misc/ss.c

   1 /*
   2  * ss.c         "sockstat", socket statistics
   3  *
   4  *              This program is free software; you can redistribute it and/or
   5  *              modify it under the terms of the GNU General Public License
   6  *              as published by the Free Software Foundation; either version
   7  *              2 of the License, or (at your option) any later version.
   8  *
   9  * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
  10  */
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <unistd.h>
  15 #include <syslog.h>
  16 #include <fcntl.h>
  17 #include <sys/ioctl.h>
  18 #include <sys/socket.h>
  19 #include <sys/uio.h>
  20 #include <netinet/in.h>
  21 #include <string.h>
  22 #include <errno.h>
  23 #include <netdb.h>
  24 #include <arpa/inet.h>
  25 #include <resolv.h>
  26 #include <dirent.h>
  27 #include <fnmatch.h>
  28 #include <getopt.h>
  29
  30 #include "utils.h"
  31 #include "rt_names.h"
  32 #include "ll_map.h"
  33 #include "libnetlink.h"
  34 #include "SNAPSHOT.h"
  35
  36 #include <linux/inet_diag.h>
  37 #include <linux/tcp.h>
  38 #include <net/tcp_states.h>
  39
  40 int resolve_hosts = 0;
  41 int resolve_services = 1;
  42 int preferred_family = AF_UNSPEC;
  43 int show_options = 0;
  44 int show_details = 0;
  45 int show_users = 0;
  46 int show_mem = 0;
  47 int show_tcpinfo = 0;
  48
  49 int netid_width;
  50 int state_width;
  51 int addrp_width;
  52 int addr_width;
  53 int serv_width;
  54 int screen_width;
  55
  56 static const char *TCP_PROTO = "tcp";
  57 static const char *UDP_PROTO = "udp";
  58 static const char *RAW_PROTO = "raw";
  59 static const char *dg_proto = NULL;
  60
  61 enum
  62 {
  63         TCP_DB,
  64         DCCP_DB,
  65         UDP_DB,
  66         RAW_DB,
  67         UNIX_DG_DB,
  68         UNIX_ST_DB,
  69         PACKET_DG_DB,
  70         PACKET_R_DB,
  71         NETLINK_DB,
  72         MAX_DB
  73 };
  74
  75 #define PACKET_DBM ((1<<PACKET_DG_DB)|(1<<PACKET_R_DB))
  76 #define UNIX_DBM ((1<<UNIX_DG_DB)|(1<<UNIX_ST_DB))
  77 #define ALL_DB ((1<<MAX_DB)-1)
  78
  79 enum {
  80         SS_UNKNOWN,
  81         SS_ESTABLISHED,
  82         SS_SYN_SENT,
  83         SS_SYN_RECV,
  84         SS_FIN_WAIT1,
  85         SS_FIN_WAIT2,
  86         SS_TIME_WAIT,
  87         SS_CLOSE,
  88         SS_CLOSE_WAIT,
  89         SS_LAST_ACK,
  90         SS_LISTEN,
  91         SS_CLOSING,
  92         SS_MAX
  93 };
  94
  95 #define SS_ALL ((1<<SS_MAX)-1)
  96
  97 #include "ssfilter.h"
  98
  99 struct filter
 100 {
 101         int dbs;
 102         int states;
 103         int families;
 104         struct ssfilter *f;
 105 };
 106
 107 struct filter default_filter = {
 108         dbs: (1<<TCP_DB),
 109         states: SS_ALL & ~((1<<SS_LISTEN)|(1<<SS_CLOSE)|(1<<SS_TIME_WAIT)|(1<<SS_SYN_RECV)),
 110         families: (1<<AF_INET)|(1<<AF_INET6),
 111 };
 112
 113 struct filter current_filter;
 114
 115 int generic_proc_open(char *env, char *name)
 116 {
 117         char store[128];
 118         char *p = getenv(env);
 119         if (!p) {
 120                 p = getenv("PROC_ROOT") ? : "/proc";
 121                 snprintf(store, sizeof(store)-1, "%s/%s", p, name);
 122                 p = store;
 123         }
 124         return open(store, O_RDONLY);
 125 }
 126
 127 int net_tcp_open(void)
 128 {
 129         return generic_proc_open("PROC_NET_TCP", "net/tcp");
 130 }
 131
 132 int net_tcp6_open(void)
 133 {
 134         return generic_proc_open("PROC_NET_TCP6", "net/tcp6");
 135 }
 136
 137 int net_udp_open(void)
 138 {
 139         return generic_proc_open("PROC_NET_UDP", "net/udp");
 140 }
 141
 142 int net_udp6_open(void)
 143 {
 144         return generic_proc_open("PROC_NET_UDP6", "net/udp6");
 145 }
 146
 147 int net_raw_open(void)
 148 {
 149         return generic_proc_open("PROC_NET_RAW", "net/raw");
 150 }
 151
 152 int net_raw6_open(void)
 153 {
 154         return generic_proc_open("PROC_NET_RAW6", "net/raw6");
 155 }
 156
 157 int net_unix_open(void)
 158 {
 159         return generic_proc_open("PROC_NET_UNIX", "net/unix");
 160 }
 161
 162 int net_packet_open(void)
 163 {
 164         return generic_proc_open("PROC_NET_PACKET", "net/packet");
 165 }
 166
 167 int net_netlink_open(void)
 168 {
 169         return generic_proc_open("PROC_NET_NETLINK", "net/netlink");
 170 }
 171
 172 int slabinfo_open(void)
 173 {
 174         return generic_proc_open("PROC_SLABINFO", "slabinfo");
 175 }
 176
 177 int net_sockstat_open(void)
 178 {
 179         return generic_proc_open("PROC_NET_SOCKSTAT", "net/sockstat");
 180 }
 181
 182 int net_sockstat6_open(void)
 183 {
 184         return generic_proc_open("PROC_NET_SOCKSTAT6", "net/sockstat6");
 185 }
 186
 187 int net_snmp_open(void)
 188 {
 189         return generic_proc_open("PROC_NET_SNMP", "net/snmp");
 190 }
 191
 192 int net_netstat_open(void)
 193 {
 194         return generic_proc_open("PROC_NET_NETSTAT", "net/netstat");
 195 }
 196
 197 int ephemeral_ports_open(void)
 198 {
 199         return generic_proc_open("PROC_IP_LOCAL_PORT_RANGE", "sys/net/ipv4/ip_local_port_range");
 200 }
 201
 202 int find_users(int ino, char *buf, int buflen)
 203 {
 204         char pattern[64];
 205         int  pattern_len;
 206         char *ptr = buf;
 207         char name[1024];
 208         DIR *dir;
 209         struct dirent *d;
 210         int cnt = 0;
 211         int nameoff;
 212
 213         if (!ino)
 214                 return 0;
 215
 216         sprintf(pattern, "socket:[%d]", ino);
 217         pattern_len = strlen(pattern);
 218
 219         strncpy(name, getenv("PROC_ROOT") ? : "/proc/", sizeof(name)/2);
 220         name[sizeof(name)/2] = 0;
 221         if (strlen(name) == 0 ||
 222             name[strlen(name)-1] != '/')
 223                 strcat(name, "/");
 224         nameoff = strlen(name);
 225         if ((dir = opendir(name)) == NULL)
 226                 return 0;
 227
 228         while ((d = readdir(dir)) != NULL) {
 229                 DIR *dir1;
 230                 struct dirent *d1;
 231                 int pid;
 232                 int pos;
 233                 char crap;
 234                 char process[16];
 235
 236                 if (sscanf(d->d_name, "%d%c", &pid, &crap) != 1)
 237                         continue;
 238
 239                 sprintf(name+nameoff, "%d/fd/", pid);
 240                 pos = strlen(name);
 241                 if ((dir1 = opendir(name)) == NULL)
 242                         continue;
 243
 244                 process[0] = 0;
 245
 246                 while ((d1 = readdir(dir1)) != NULL) {
 247                         int fd, n;
 248                         char lnk[64];
 249
 250                         if (sscanf(d1->d_name, "%d%c", &fd, &crap) != 1)
 251                                 continue;
 252
 253                         sprintf(name+pos, "%d", fd);
 254                         n = readlink(name, lnk, sizeof(lnk)-1);
 255                         if (n != pattern_len ||
 256                             memcmp(lnk, pattern, n))
 257                                 continue;
 258
 259                         if (ptr-buf >= buflen-1)
 260                                 break;
 261
 262                         if (process[0] == 0) {
 263                                 char tmp[1024];
 264                                 FILE *fp;
 265                                 snprintf(tmp, sizeof(tmp), "%s/%d/stat",
 266                                          getenv("PROC_ROOT") ? : "/proc", pid);
 267                                 if ((fp = fopen(tmp, "r")) != NULL) {
 268                                         fscanf(fp, "%*d (%[^)])", process);
 269                                         fclose(fp);
 270                                 }
 271                         }
 272
 273                         snprintf(ptr, buflen-(ptr-buf), "(\"%s\",%d,%d),", process, pid, fd);
 274                         ptr += strlen(ptr);
 275                         cnt++;
 276                 }
 277                 closedir(dir1);
 278         }
 279         closedir(dir);
 280         if (ptr != buf)
 281                 ptr[-1] = 0;
 282         return cnt;
 283 }
 284
 285
 286 /* Get stats from slab */
 287
 288 struct slabstat
 289 {
 290         int socks;
 291         int tcp_ports;
 292         int tcp_tws;
 293         int tcp_syns;
 294         int skbs;
 295 };
 296
 297 struct slabstat slabstat;
 298
 299 static const char *slabstat_ids[] =
 300 {
 301         "sock",
 302         "tcp_bind_bucket",
 303         "tcp_tw_bucket",
 304         "tcp_open_request",
 305         "skbuff_head_cache",
 306 };
 307
 308 int get_slabstat(struct slabstat *s)
 309 {
 310         char buf[256];
 311         FILE *fp;
 312         int cnt;
 313
 314         memset(s, 0, sizeof(*s));
 315
 316         if ((fp = fdopen(slabinfo_open(), "r")) == NULL)
 317                 return -1;
 318
 319         cnt = sizeof(*s)/sizeof(int);
 320
 321         fgets(buf, sizeof(buf), fp);
 322         while(fgets(buf, sizeof(buf), fp) != NULL) {
 323                 int i;
 324                 for (i=0; i<sizeof(slabstat_ids)/sizeof(slabstat_ids[0]); i++) {
 325                         if (memcmp(buf, slabstat_ids[i], strlen(slabstat_ids[i])) == 0) {
 326                                 sscanf(buf, "%*s%d", ((int *)s) + i);
 327                                 cnt--;
 328                                 break;
 329                         }
 330                 }
 331                 if (cnt <= 0)
 332                         break;
 333         }
 334
 335         fclose(fp);
 336         return 0;
 337 }
 338
 339 static const char *sstate_name[] = {
 340         "UNKNOWN",
 341         [TCP_ESTABLISHED] = "ESTAB",
 342         [TCP_SYN_SENT] = "SYN-SENT",
 343         [TCP_SYN_RECV] = "SYN-RECV",
 344         [TCP_FIN_WAIT1] = "FIN-WAIT-1",
 345         [TCP_FIN_WAIT2] = "FIN-WAIT-2",
 346         [TCP_TIME_WAIT] = "TIME-WAIT",
 347         [TCP_CLOSE] = "UNCONN",
 348         [TCP_CLOSE_WAIT] = "CLOSE-WAIT",
 349         [TCP_LAST_ACK] = "LAST-ACK",
 350         [TCP_LISTEN] =  "LISTEN",
 351         [TCP_CLOSING] = "CLOSING",
 352 };
 353
 354 static const char *sstate_namel[] = {
 355         "UNKNOWN",
 356         [TCP_ESTABLISHED] = "established",
 357         [TCP_SYN_SENT] = "syn-sent",
 358         [TCP_SYN_RECV] = "syn-recv",
 359         [TCP_FIN_WAIT1] = "fin-wait-1",
 360         [TCP_FIN_WAIT2] = "fin-wait-2",
 361         [TCP_TIME_WAIT] = "time-wait",
 362         [TCP_CLOSE] = "unconnected",
 363         [TCP_CLOSE_WAIT] = "close-wait",
 364         [TCP_LAST_ACK] = "last-ack",
 365         [TCP_LISTEN] =  "listening",
 366         [TCP_CLOSING] = "closing",
 367 };
 368
 369 struct tcpstat
 370 {
 371         inet_prefix     local;
 372         inet_prefix     remote;
 373         int             lport;
 374         int             rport;
 375         int             state;
 376         int             rq, wq;
 377         int             timer;
 378         int             timeout;
 379         int             retrs;
 380         int             ino;
 381         int             probes;
 382         int             uid;
 383         int             refcnt;
 384         unsigned long long sk;
 385         int             rto, ato, qack, cwnd, ssthresh;
 386 };
 387
 388 static const char *tmr_name[] = {
 389         "off",
 390         "on",
 391         "keepalive",
 392         "timewait",
 393         "persist",
 394         "unknown"
 395 };
 396
 397 const char *print_ms_timer(int timeout)
 398 {
 399         static char buf[64];
 400         int secs, msecs, minutes;
 401         if (timeout < 0)
 402                 timeout = 0;
 403         secs = timeout/1000;
 404         minutes = secs/60;
 405         secs = secs%60;
 406         msecs = timeout%1000;
 407         buf[0] = 0;
 408         if (minutes) {
 409                 msecs = 0;
 410                 snprintf(buf, sizeof(buf)-16, "%dmin", minutes);
 411                 if (minutes > 9)
 412                         secs = 0;
 413         }
 414         if (secs) {
 415                 if (secs > 9)
 416                         msecs = 0;
 417                 sprintf(buf+strlen(buf), "%d%s", secs, msecs ? "." : "sec");
 418         }
 419         if (msecs)
 420                 sprintf(buf+strlen(buf), "%03dms", msecs);
 421         return buf;
 422 };
 423
 424 const char *print_hz_timer(int timeout)
 425 {
 426         int hz = get_hz();
 427         return print_ms_timer(((timeout*1000) + hz-1)/hz);
 428 };
 429
 430 struct scache
 431 {
 432         struct scache *next;
 433         int port;
 434         char *name;
 435         const char *proto;
 436 };
 437
 438 struct scache *rlist;
 439
 440 void init_service_resolver(void)
 441 {
 442         char buf[128];
 443         FILE *fp = popen("/usr/sbin/rpcinfo -p 2>/dev/null", "r");
 444         if (fp) {
 445                 fgets(buf, sizeof(buf), fp);
 446                 while (fgets(buf, sizeof(buf), fp) != NULL) {
 447                         unsigned int progn, port;
 448                         char proto[128], prog[128];
 449                         if (sscanf(buf, "%u %*d %s %u %s", &progn, proto,
 450                                    &port, prog+4) == 4) {
 451                                 struct scache *c = malloc(sizeof(*c));
 452                                 if (c) {
 453                                         c->port = port;
 454                                         memcpy(prog, "rpc.", 4);
 455                                         c->name = strdup(prog);
 456                                         if (strcmp(proto, TCP_PROTO) == 0)
 457                                                 c->proto = TCP_PROTO;
 458                                         else if (strcmp(proto, UDP_PROTO) == 0)
 459                                                 c->proto = UDP_PROTO;
 460                                         else
 461                                                 c->proto = NULL;
 462                                         c->next = rlist;
 463                                         rlist = c;
 464                                 }
 465                         }
 466                 }
 467         }
 468 }
 469
 470 static int ip_local_port_min, ip_local_port_max;
 471
 472 /* Even do not try default linux ephemeral port ranges:
 473  * default /etc/services contains so much of useless crap
 474  * wouldbe "allocated" to this area that resolution
 475  * is really harmful. I shrug each time when seeing
 476  * "socks" or "cfinger" in dumps.
 477  */
 478 static int is_ephemeral(int port)
 479 {
 480         if (!ip_local_port_min) {
 481                 FILE *f = fdopen(ephemeral_ports_open(), "r");
 482                 if (f) {
 483                         fscanf(f, "%d %d",
 484                                &ip_local_port_min, &ip_local_port_max);
 485                         fclose(f);
 486                 } else {
 487                         ip_local_port_min = 1024;
 488                         ip_local_port_max = 4999;
 489                 }
 490         }
 491
 492         return (port >= ip_local_port_min && port<= ip_local_port_max);
 493 }
 494
 495
 496 const char *__resolve_service(int port)
 497 {
 498         struct scache *c;
 499
 500         for (c = rlist; c; c = c->next) {
 501                 if (c->port == port && c->proto == dg_proto)
 502                         return c->name;
 503         }
 504
 505         if (!is_ephemeral(port)) {
 506                 static int notfirst;
 507                 struct servent *se;
 508                 if (!notfirst) {
 509                         setservent(1);
 510                         notfirst = 1;
 511                 }
 512                 se = getservbyport(htons(port), dg_proto);
 513                 if (se)
 514                         return se->s_name;
 515         }
 516
 517         return NULL;
 518 }
 519
 520
 521 const char *resolve_service(int port)
 522 {
 523         static char buf[128];
 524         static struct scache cache[256];
 525
 526         if (port == 0) {
 527                 buf[0] = '*';
 528                 buf[1] = 0;
 529                 return buf;
 530         }
 531
 532         if (resolve_services) {
 533                 if (dg_proto == RAW_PROTO) {
 534                         return inet_proto_n2a(port, buf, sizeof(buf));
 535                 } else {
 536                         struct scache *c;
 537                         const char *res;
 538                         int hash = (port^(((unsigned long)dg_proto)>>2))&255;
 539
 540                         for (c = &cache[hash]; c; c = c->next) {
 541                                 if (c->port == port &&
 542                                     c->proto == dg_proto) {
 543                                         if (c->name)
 544                                                 return c->name;
 545                                         goto do_numeric;
 546                                 }
 547                         }
 548
 549                         if ((res = __resolve_service(port)) != NULL) {
 550                                 if ((c = malloc(sizeof(*c))) == NULL)
 551                                         goto do_numeric;
 552                         } else {
 553                                 c = &cache[hash];
 554                                 if (c->name)
 555                                         free(c->name);
 556                         }
 557                         c->port = port;
 558                         c->name = NULL;
 559                         c->proto = dg_proto;
 560                         if (res) {
 561                                 c->name = strdup(res);
 562                                 c->next = cache[hash].next;
 563                                 cache[hash].next = c;
 564                         }
 565                         if (c->name)
 566                                 return c->name;
 567                 }
 568         }
 569
 570         do_numeric:
 571         sprintf(buf, "%u", port);
 572         return buf;
 573 }
 574
 575 void formatted_print(const inet_prefix *a, int port)
 576 {
 577         char buf[1024];
 578         const char *ap = buf;
 579         int est_len;
 580
 581         est_len = addr_width;
 582
 583         if (a->family == AF_INET) {
 584                 if (a->data[0] == 0) {
 585                         buf[0] = '*';
 586                         buf[1] = 0;
 587                 } else {
 588                         ap = format_host(AF_INET, 4, a->data, buf, sizeof(buf));
 589                 }
 590         } else {
 591                 ap = format_host(a->family, 16, a->data, buf, sizeof(buf));
 592                 est_len = strlen(ap);
 593                 if (est_len <= addr_width)
 594                         est_len = addr_width;
 595                 else
 596                         est_len = addr_width + ((est_len-addr_width+3)/4)*4;
 597         }
 598         printf("%*s:%-*s ", est_len, ap, serv_width, resolve_service(port));
 599 }
 600
 601 struct aafilter
 602 {
 603         inet_prefix     addr;
 604         int             port;
 605         struct aafilter *next;
 606 };
 607
 608 int inet2_addr_match(const inet_prefix *a, const inet_prefix *p, int plen)
 609 {
 610         if (!inet_addr_match(a, p, plen))
 611                 return 0;
 612
 613         /* Cursed "v4 mapped" addresses: v4 mapped socket matches
 614          * pure IPv4 rule, but v4-mapped rule selects only v4-mapped
 615          * sockets. Fair? */
 616         if (p->family == AF_INET && a->family == AF_INET6) {
 617                 if (a->data[0] == 0 && a->data[1] == 0 &&
 618                     a->data[2] == htonl(0xffff)) {
 619                         inet_prefix tmp = *a;
 620                         tmp.data[0] = a->data[3];
 621                         return inet_addr_match(&tmp, p, plen);
 622                 }
 623         }
 624         return 1;
 625 }
 626
 627 int unix_match(const inet_prefix *a, const inet_prefix *p)
 628 {
 629         char *addr, *pattern;
 630         memcpy(&addr, a->data, sizeof(addr));
 631         memcpy(&pattern, p->data, sizeof(pattern));
 632         if (pattern == NULL)
 633                 return 1;
 634         if (addr == NULL)
 635                 addr = "";
 636         return !fnmatch(pattern, addr, 0);
 637 }
 638
 639 int run_ssfilter(struct ssfilter *f, struct tcpstat *s)
 640 {
 641         switch (f->type) {
 642                 case SSF_S_AUTO:
 643         {
 644                 static int low, high=65535;
 645
 646                 if (s->local.family == AF_UNIX) {
 647                         char *p;
 648                         memcpy(&p, s->local.data, sizeof(p));
 649                         return p == NULL || (p[0] == '@' && strlen(p) == 6 &&
 650                                              strspn(p+1, "0123456789abcdef") == 5);
 651                 }
 652                 if (s->local.family == AF_PACKET)
 653                         return s->lport == 0 && s->local.data == 0;
 654                 if (s->local.family == AF_NETLINK)
 655                         return s->lport < 0;
 656
 657                 if (!low) {
 658                         FILE *fp = fdopen(ephemeral_ports_open(), "r");
 659                         if (fp) {
 660                                 fscanf(fp, "%d%d", &low, &high);
 661                                 fclose(fp);
 662                         }
 663                 }
 664                 return s->lport >= low && s->lport <= high;
 665         }
 666                 case SSF_DCOND:
 667         {
 668                 struct aafilter *a = (void*)f->pred;
 669                 if (a->addr.family == AF_UNIX)
 670                         return unix_match(&s->remote, &a->addr);
 671                 if (a->port != -1 && a->port != s->rport)
 672                         return 0;
 673                 if (a->addr.bitlen) {
 674                         do {
 675                                 if (!inet2_addr_match(&s->remote, &a->addr, a->addr.bitlen))
 676                                         return 1;
 677                         } while ((a = a->next) != NULL);
 678                         return 0;
 679                 }
 680                 return 1;
 681         }
 682                 case SSF_SCOND:
 683         {
 684                 struct aafilter *a = (void*)f->pred;
 685                 if (a->addr.family == AF_UNIX)
 686                         return unix_match(&s->local, &a->addr);
 687                 if (a->port != -1 && a->port != s->lport)
 688                         return 0;
 689                 if (a->addr.bitlen) {
 690                         do {
 691                                 if (!inet2_addr_match(&s->local, &a->addr, a->addr.bitlen))
 692                                         return 1;
 693                         } while ((a = a->next) != NULL);
 694                         return 0;
 695                 }
 696                 return 1;
 697         }
 698                 case SSF_D_GE:
 699         {
 700                 struct aafilter *a = (void*)f->pred;
 701                 return s->rport >= a->port;
 702         }
 703                 case SSF_D_LE:
 704         {
 705                 struct aafilter *a = (void*)f->pred;
 706                 return s->rport <= a->port;
 707         }
 708                 case SSF_S_GE:
 709         {
 710                 struct aafilter *a = (void*)f->pred;
 711                 return s->lport >= a->port;
 712         }
 713                 case SSF_S_LE:
 714         {
 715                 struct aafilter *a = (void*)f->pred;
 716                 return s->lport <= a->port;
 717         }
 718
 719                 /* Yup. It is recursion. Sorry. */
 720                 case SSF_AND:
 721                 return run_ssfilter(f->pred, s) && run_ssfilter(f->post, s);
 722                 case SSF_OR:
 723                 return run_ssfilter(f->pred, s) || run_ssfilter(f->post, s);
 724                 case SSF_NOT:
 725                 return !run_ssfilter(f->pred, s);
 726                 default:
 727                 abort();
 728         }
 729 }
 730
 731 /* Relocate external jumps by reloc. */
 732 static void ssfilter_patch(char *a, int len, int reloc)
 733 {
 734         while (len > 0) {
 735                 struct inet_diag_bc_op *op = (struct inet_diag_bc_op*)a;
 736                 if (op->no == len+4)
 737                         op->no += reloc;
 738                 len -= op->yes;
 739                 a += op->yes;
 740         }
 741         if (len < 0)
 742                 abort();
 743 }
 744
 745 static int ssfilter_bytecompile(struct ssfilter *f, char **bytecode)
 746 {
 747         switch (f->type) {
 748                 case SSF_S_AUTO:
 749         {
 750                 if (!(*bytecode=malloc(4))) abort();
 751                 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_AUTO, 4, 8 };
 752                 return 8;
 753         }
 754                 case SSF_DCOND:
 755                 case SSF_SCOND:
 756         {
 757                 struct aafilter *a = (void*)f->pred;
 758                 struct aafilter *b;
 759                 char *ptr;
 760                 int  code = (f->type == SSF_DCOND ? INET_DIAG_BC_D_COND : INET_DIAG_BC_S_COND);
 761                 int len = 0;
 762
 763                 for (b=a; b; b=b->next) {
 764                         len += 4 + sizeof(struct inet_diag_hostcond);
 765                         if (a->addr.family == AF_INET6)
 766                                 len += 16;
 767                         else
 768                                 len += 4;
 769                         if (b->next)
 770                                 len += 4;
 771                 }
 772                 if (!(ptr = malloc(len))) abort();
 773                 *bytecode = ptr;
 774                 for (b=a; b; b=b->next) {
 775                         struct inet_diag_bc_op *op = (struct inet_diag_bc_op *)ptr;
 776                         int alen = (a->addr.family == AF_INET6 ? 16 : 4);
 777                         int oplen = alen + 4 + sizeof(struct inet_diag_hostcond);
 778                         struct inet_diag_hostcond *cond = (struct inet_diag_hostcond*)(ptr+4);
 779
 780                         *op = (struct inet_diag_bc_op){ code, oplen, oplen+4 };
 781                         cond->family = a->addr.family;
 782                         cond->port = a->port;
 783                         cond->prefix_len = a->addr.bitlen;
 784                         memcpy(cond->addr, a->addr.data, alen);
 785                         ptr += oplen;
 786                         if (b->next) {
 787                                 op = (struct inet_diag_bc_op *)ptr;
 788                                 *op = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, len - (ptr-*bytecode)};
 789                                 ptr += 4;
 790                         }
 791                 }
 792                 return ptr - *bytecode;
 793         }
 794                 case SSF_D_GE:
 795         {
 796                 struct aafilter *x = (void*)f->pred;
 797                 if (!(*bytecode=malloc(8))) abort();
 798                 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_D_GE, 8, 12 };
 799                 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
 800                 return 8;
 801         }
 802                 case SSF_D_LE:
 803         {
 804                 struct aafilter *x = (void*)f->pred;
 805                 if (!(*bytecode=malloc(8))) abort();
 806                 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_D_LE, 8, 12 };
 807                 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
 808                 return 8;
 809         }
 810                 case SSF_S_GE:
 811         {
 812                 struct aafilter *x = (void*)f->pred;
 813                 if (!(*bytecode=malloc(8))) abort();
 814                 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_S_GE, 8, 12 };
 815                 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
 816                 return 8;
 817         }
 818                 case SSF_S_LE:
 819         {
 820                 struct aafilter *x = (void*)f->pred;
 821                 if (!(*bytecode=malloc(8))) abort();
 822                 ((struct inet_diag_bc_op*)*bytecode)[0] = (struct inet_diag_bc_op){ INET_DIAG_BC_S_LE, 8, 12 };
 823                 ((struct inet_diag_bc_op*)*bytecode)[1] = (struct inet_diag_bc_op){ 0, 0, x->port };
 824                 return 8;
 825         }
 826
 827                 case SSF_AND:
 828         {
 829                 char *a1, *a2, *a, l1, l2;
 830                 l1 = ssfilter_bytecompile(f->pred, &a1);
 831                 l2 = ssfilter_bytecompile(f->post, &a2);
 832                 if (!(a = malloc(l1+l2))) abort();
 833                 memcpy(a, a1, l1);
 834                 memcpy(a+l1, a2, l2);
 835                 free(a1); free(a2);
 836                 ssfilter_patch(a, l1, l2);
 837                 *bytecode = a;
 838                 return l1+l2;
 839         }
 840                 case SSF_OR:
 841         {
 842                 char *a1, *a2, *a, l1, l2;
 843                 l1 = ssfilter_bytecompile(f->pred, &a1);
 844                 l2 = ssfilter_bytecompile(f->post, &a2);
 845                 if (!(a = malloc(l1+l2+4))) abort();
 846                 memcpy(a, a1, l1);
 847                 memcpy(a+l1+4, a2, l2);
 848                 free(a1); free(a2);
 849                 *(struct inet_diag_bc_op*)(a+l1) = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, l2+4 };
 850                 *bytecode = a;
 851                 return l1+l2+4;
 852         }
 853                 case SSF_NOT:
 854         {
 855                 char *a1, *a, l1;
 856                 l1 = ssfilter_bytecompile(f->pred, &a1);
 857                 if (!(a = malloc(l1+4))) abort();
 858                 memcpy(a, a1, l1);
 859                 free(a1);
 860                 *(struct inet_diag_bc_op*)(a+l1) = (struct inet_diag_bc_op){ INET_DIAG_BC_JMP, 4, 8 };
 861                 *bytecode = a;
 862                 return l1+4;
 863         }
 864                 default:
 865                 abort();
 866         }
 867 }
 868
 869 static int remember_he(struct aafilter *a, struct hostent *he)
 870 {
 871         char **ptr = he->h_addr_list;
 872         int cnt = 0;
 873         int len;
 874
 875         if (he->h_addrtype == AF_INET)
 876                 len = 4;
 877         else if (he->h_addrtype == AF_INET6)
 878                 len = 16;
 879         else
 880                 return 0;
 881
 882         while (*ptr) {
 883                 struct aafilter *b = a;
 884                 if (a->addr.bitlen) {
 885                         if ((b = malloc(sizeof(*b))) == NULL)
 886                                 return cnt;
 887                         *b = *a;
 888                         b->next = a->next;
 889                         a->next = b;
 890                 }
 891                 memcpy(b->addr.data, *ptr, len);
 892                 b->addr.bytelen = len;
 893                 b->addr.bitlen = len*8;
 894                 b->addr.family = he->h_addrtype;
 895                 ptr++;
 896                 cnt++;
 897         }
 898         return cnt;
 899 }
 900
 901 static int get_dns_host(struct aafilter *a, const char *addr, int fam)
 902 {
 903         static int notfirst;
 904         int cnt = 0;
 905         struct hostent *he;
 906
 907         a->addr.bitlen = 0;
 908         if (!notfirst) {
 909                 sethostent(1);
 910                 notfirst = 1;
 911         }
 912         he = gethostbyname2(addr, fam == AF_UNSPEC ? AF_INET : fam);
 913         if (he)
 914                 cnt = remember_he(a, he);
 915         if (fam == AF_UNSPEC) {
 916                 he = gethostbyname2(addr, AF_INET6);
 917                 if (he)
 918                         cnt += remember_he(a, he);
 919         }
 920         return !cnt;
 921 }
 922
 923 static int xll_initted = 0;
 924
 925 static void xll_init(void)
 926 {
 927         struct rtnl_handle rth;
 928         rtnl_open(&rth, 0);
 929         ll_init_map(&rth);
 930         rtnl_close(&rth);
 931         xll_initted = 1;
 932 }
 933
 934 static const char *xll_index_to_name(int index)
 935 {
 936         if (!xll_initted)
 937                 xll_init();
 938         return ll_index_to_name(index);
 939 }
 940
 941 static int xll_name_to_index(const char *dev)
 942 {
 943         if (!xll_initted)
 944                 xll_init();
 945         return ll_name_to_index(dev);
 946 }
 947
 948 void *parse_hostcond(char *addr)
 949 {
 950         char *port = NULL;
 951         struct aafilter a;
 952         struct aafilter *res;
 953         int fam = preferred_family;
 954
 955         memset(&a, 0, sizeof(a));
 956         a.port = -1;
 957
 958         if (fam == AF_UNIX || strncmp(addr, "unix:", 5) == 0) {
 959                 char *p;
 960                 a.addr.family = AF_UNIX;
 961                 if (strncmp(addr, "unix:", 5) == 0)
 962                         addr+=5;
 963                 p = strdup(addr);
 964                 a.addr.bitlen = 8*strlen(p);
 965                 memcpy(a.addr.data, &p, sizeof(p));
 966                 goto out;
 967         }
 968
 969         if (fam == AF_PACKET || strncmp(addr, "link:", 5) == 0) {
 970                 a.addr.family = AF_PACKET;
 971                 a.addr.bitlen = 0;
 972                 if (strncmp(addr, "link:", 5) == 0)
 973                         addr+=5;
 974                 port = strchr(addr, ':');
 975                 if (port) {
 976                         *port = 0;
 977                         if (port[1] && strcmp(port+1, "*")) {
 978                                 if (get_integer(&a.port, port+1, 0)) {
 979                                         if ((a.port = xll_name_to_index(port+1)) <= 0)
 980                                                 return NULL;
 981                                 }
 982                         }
 983                 }
 984                 if (addr[0] && strcmp(addr, "*")) {
 985                         unsigned short tmp;
 986                         a.addr.bitlen = 32;
 987                         if (ll_proto_a2n(&tmp, addr))
 988                                 return NULL;
 989                         a.addr.data[0] = ntohs(tmp);
 990                 }
 991                 goto out;
 992         }
 993
 994         if (fam == AF_NETLINK || strncmp(addr, "netlink:", 8) == 0) {
 995                 a.addr.family = AF_NETLINK;
 996                 a.addr.bitlen = 0;
 997                 if (strncmp(addr, "netlink:", 8) == 0)
 998                         addr+=8;
 999                 port = strchr(addr, ':');
1000                 if (port) {
1001                         *port = 0;
1002                         if (port[1] && strcmp(port+1, "*")) {
1003                                 if (get_integer(&a.port, port+1, 0)) {
1004                                         if (strcmp(port+1, "kernel") == 0)
1005                                                 a.port = 0;
1006                                         else
1007                                                 return NULL;
1008                                 }
1009                         }
1010                 }
1011                 if (addr[0] && strcmp(addr, "*")) {
1012                         a.addr.bitlen = 32;
1013                         if (get_u32(a.addr.data, addr, 0)) {
1014                                 if (strcmp(addr, "rtnl") == 0)
1015                                         a.addr.data[0] = 0;
1016                                 else if (strcmp(addr, "fw") == 0)
1017                                         a.addr.data[0] = 3;
1018                                 else if (strcmp(addr, "tcpdiag") == 0)
1019                                         a.addr.data[0] = 4;
1020                                 else
1021                                         return NULL;
1022                         }
1023                 }
1024                 goto out;
1025         }
1026
1027         if (strncmp(addr, "inet:", 5) == 0) {
1028                 addr += 5;
1029                 fam = AF_INET;
1030         } else if (strncmp(addr, "inet6:", 6) == 0) {
1031                 addr += 6;
1032                 fam = AF_INET6;
1033         }
1034
1035         /* URL-like literal [] */
1036         if (addr[0] == '[') {
1037                 addr++;
1038                 if ((port = strchr(addr, ']')) == NULL)
1039                         return NULL;
1040                 *port++ = 0;
1041         } else if (addr[0] == '*') {
1042                 port = addr+1;
1043         } else {
1044                 port = strrchr(strchr(addr, '/') ? : addr, ':');
1045         }
1046         if (port && *port) {
1047                 if (*port != ':')
1048                         return NULL;
1049                 *port++ = 0;
1050                 if (*port && *port != '*') {
1051                         if (get_integer(&a.port, port, 0)) {
1052                                 struct servent *se1 = NULL;
1053                                 struct servent *se2 = NULL;
1054                                 if (current_filter.dbs&(1<<UDP_DB))
1055                                         se1 = getservbyname(port, UDP_PROTO);
1056                                 if (current_filter.dbs&(1<<TCP_DB))
1057                                         se2 = getservbyname(port, TCP_PROTO);
1058                                 if (se1 && se2 && se1->s_port != se2->s_port) {
1059                                         fprintf(stderr, "Error: ambiguous port \"%s\".\n", port);
1060                                         return NULL;
1061                                 }
1062                                 if (!se1)
1063                                         se1 = se2;
1064                                 if (se1) {
1065                                         a.port = ntohs(se1->s_port);
1066                                 } else {
1067                                         struct scache *s;
1068                                         for (s = rlist; s; s = s->next) {
1069                                                 if ((s->proto == UDP_PROTO &&
1070                                                      (current_filter.dbs&(1<<UDP_DB))) ||
1071                                                     (s->proto == TCP_PROTO &&
1072                                                      (current_filter.dbs&(1<<TCP_DB)))) {
1073                                                         if (s->name && strcmp(s->name, port) == 0) {
1074                                                                 if (a.port > 0 && a.port != s->port) {
1075                                                                         fprintf(stderr, "Error: ambiguous port \"%s\".\n", port);
1076                                                                         return NULL;
1077                                                                 }
1078                                                                 a.port = s->port;
1079                                                         }
1080                                                 }
1081                                         }
1082                                         if (a.port <= 0) {
1083                                                 fprintf(stderr, "Error: \"%s\" does not look like a port.\n", port);
1084                                                 return NULL;
1085                                         }
1086                                 }
1087                         }
1088                 }
1089         }
1090         if (addr && *addr && *addr != '*') {
1091                 if (get_prefix_1(&a.addr, addr, fam)) {
1092                         if (get_dns_host(&a, addr, fam)) {
1093                                 fprintf(stderr, "Error: an inet prefix is expected rather than \"%s\".\n", addr);
1094                                 return NULL;
1095                         }
1096                 }
1097         }
1098
1099         out:
1100         res = malloc(sizeof(*res));
1101         if (res)
1102                 memcpy(res, &a, sizeof(a));
1103         return res;
1104 }
1105
1106 static int tcp_show_line(char *line, struct filter *f, int family)
1107 {
1108         struct tcpstat s;
1109         char *loc, *rem, *data;
1110         char opt[256];
1111         int n;
1112         char *p;
1113
1114         if ((p = strchr(line, ':')) == NULL)
1115                 return -1;
1116         loc = p+2;
1117
1118         if ((p = strchr(loc, ':')) == NULL)
1119                 return -1;
1120         p[5] = 0;
1121         rem = p+6;
1122
1123         if ((p = strchr(rem, ':')) == NULL)
1124                 return -1;
1125         p[5] = 0;
1126         data = p+6;
1127
1128         do {
1129                 int state = (data[1] >= 'A') ? (data[1] - 'A' + 10) : (data[1] - '0');
1130
1131                 if (!(f->states & (1<<state)))
1132                         return 0;
1133         } while (0);
1134
1135         s.local.family = s.remote.family = family;
1136         if (family == AF_INET) {
1137                 sscanf(loc, "%x:%x", s.local.data, (unsigned*)&s.lport);
1138                 sscanf(rem, "%x:%x", s.remote.data, (unsigned*)&s.rport);
1139                 s.local.bytelen = s.remote.bytelen = 4;
1140         } else {
1141                 sscanf(loc, "%08x%08x%08x%08x:%x",
1142                        s.local.data,
1143                        s.local.data+1,
1144                        s.local.data+2,
1145                        s.local.data+3,
1146                        &s.lport);
1147                 sscanf(rem, "%08x%08x%08x%08x:%x",
1148                        s.remote.data,
1149                        s.remote.data+1,
1150                        s.remote.data+2,
1151                        s.remote.data+3,
1152                        &s.rport);
1153                 s.local.bytelen = s.remote.bytelen = 16;
1154         }
1155
1156         if (f->f && run_ssfilter(f->f, &s) == 0)
1157                 return 0;
1158
1159         opt[0] = 0;
1160         n = sscanf(data, "%x %x:%x %x:%x %x %d %d %d %d %llx %d %d %d %d %d %[^\n]\n",
1161                    &s.state, &s.wq, &s.rq,
1162                    &s.timer, &s.timeout, &s.retrs, &s.uid, &s.probes, &s.ino,
1163                    &s.refcnt, &s.sk, &s.rto, &s.ato, &s.qack,
1164                    &s.cwnd, &s.ssthresh, opt);
1165
1166         if (n < 17)
1167                 opt[0] = 0;
1168
1169         if (n < 12) {
1170                 s.rto = 0;
1171                 s.cwnd = 2;
1172                 s.ssthresh = -1;
1173                 s.ato = s.qack = 0;
1174         }
1175
1176         if (netid_width)
1177                 printf("%-*s ", netid_width, "tcp");
1178         if (state_width)
1179                 printf("%-*s ", state_width, sstate_name[s.state]);
1180
1181         printf("%-6d %-6d ", s.rq, s.wq);
1182
1183         formatted_print(&s.local, s.lport);
1184         formatted_print(&s.remote, s.rport);
1185
1186         if (show_options) {
1187                 if (s.timer) {
1188                         if (s.timer > 4)
1189                                 s.timer = 5;
1190                         printf(" timer:(%s,%s,%d)",
1191                                tmr_name[s.timer],
1192                                print_hz_timer(s.timeout),
1193                                s.timer != 1 ? s.probes : s.retrs);
1194                 }
1195         }
1196         if (show_tcpinfo) {
1197                 if (s.rto && s.rto != 3*get_hz())
1198                         printf(" rto:%g", (double)s.rto/get_hz());
1199                 if (s.ato)
1200                         printf(" ato:%g", (double)s.ato/get_hz());
1201                 if (s.cwnd != 2)
1202                         printf(" cwnd:%d", s.cwnd);
1203                 if (s.ssthresh != -1)
1204                         printf(" ssthresh:%d", s.ssthresh);
1205                 if (s.qack/2)
1206                         printf(" qack:%d", s.qack/2);
1207                 if (s.qack&1)
1208                         printf(" bidir");
1209         }
1210         if (show_users) {
1211                 char ubuf[4096];
1212                 if (find_users(s.ino, ubuf, sizeof(ubuf)) > 0)
1213                         printf(" users:(%s)", ubuf);
1214         }
1215         if (show_details) {
1216                 if (s.uid)
1217                         printf(" uid:%u", (unsigned)s.uid);
1218                 printf(" ino:%u", (unsigned)s.ino);
1219                 printf(" sk:%llx", s.sk);
1220                 if (opt[0])
1221                         printf(" opt:\"%s\"", opt);
1222         }
1223         printf("\n");
1224
1225         return 0;
1226 }
1227
1228 static int generic_record_read(int fd, char *buf, int bufsize,
1229                         int (*worker)(char*, struct filter *, int),
1230                         struct filter *f, int fam)
1231 {
1232         int n;
1233         int recsize;
1234         int eof = 0;
1235         char *p;
1236
1237         /* Load the first chunk and calculate record length from it. */
1238         n = read(fd, buf, bufsize);
1239         if (n < 0)
1240                 goto outerr;
1241         /* I _know_ that this is wrong, do not remind. :-)
1242          * But this works nowadays. */
1243         if (n < bufsize)
1244                 eof = 1;
1245         p = memchr(buf, '\n', n);
1246         if (p == NULL || (p-buf) >= n)
1247                 goto outwrongformat;
1248         recsize = (p-buf)+1;
1249         p = buf+recsize;
1250
1251         for (;;) {
1252                 while ((p+recsize) - buf <= n) {
1253                         if (p[recsize-1] != '\n')
1254                                 goto outwrongformat;
1255                         p[recsize-1] = 0;
1256                         if (worker(p, f, fam) < 0)
1257                                 goto done;
1258                         p += recsize;
1259                 }
1260                 if (!eof) {
1261                         int remains = (buf+bufsize) - p;
1262                         memcpy(buf, p, remains);
1263                         p = buf+remains;
1264                         n = read(fd, p, (buf+bufsize) - p);
1265                         if (n < 0)
1266                                 goto outerr;
1267                         if (n < (buf+bufsize) - p) {
1268                                 eof = 1;
1269                                 if (n == 0) {
1270                                         if (remains)
1271                                                 goto outwrongformat;
1272                                         goto done;
1273                                 }
1274                         }
1275                         n += remains;
1276                         p = buf;
1277                 } else {
1278                         if (p != buf+n)
1279                                 goto outwrongformat;
1280                         goto done;
1281                 }
1282         }
1283 done:
1284         return 0;
1285
1286 outwrongformat:
1287         errno = EINVAL;
1288 outerr:
1289         return -1;
1290 }
1291
1292 static char *sprint_bw(char *buf, double bw)
1293 {
1294         if (bw > 1000000.)
1295                 sprintf(buf,"%.1fM", bw / 1000000.);
1296         else if (bw > 1000.)
1297                 sprintf(buf,"%.1fK", bw / 1000.);
1298         else
1299                 sprintf(buf, "%g", bw);
1300
1301         return buf;
1302 }
1303
1304 static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r)
1305 {
1306         struct rtattr * tb[INET_DIAG_MAX+1];
1307         char b1[64];
1308         double rtt = 0;
1309
1310         parse_rtattr(tb, INET_DIAG_MAX, (struct rtattr*)(r+1),
1311                      nlh->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
1312
1313         if (tb[INET_DIAG_MEMINFO]) {
1314                 const struct inet_diag_meminfo *minfo
1315                         = RTA_DATA(tb[INET_DIAG_MEMINFO]);
1316                 printf(" mem:(r%u,w%u,f%u,t%u)",
1317                        minfo->idiag_rmem,
1318                        minfo->idiag_wmem,
1319                        minfo->idiag_fmem,
1320                        minfo->idiag_tmem);
1321         }
1322
1323         if (tb[INET_DIAG_INFO]) {
1324                 struct tcp_info *info;
1325                 int len = RTA_PAYLOAD(tb[INET_DIAG_INFO]);
1326
1327                 /* workaround for older kernels with less fields */
1328                 if (len < sizeof(*info)) {
1329                         info = alloca(sizeof(*info));
1330                         memset(info, 0, sizeof(*info));
1331                         memcpy(info, RTA_DATA(tb[INET_DIAG_INFO]), len);
1332                 } else
1333                         info = RTA_DATA(tb[INET_DIAG_INFO]);
1334
1335                 if (show_options) {
1336                         if (info->tcpi_options & TCPI_OPT_TIMESTAMPS)
1337                                 printf(" ts");
1338                         if (info->tcpi_options & TCPI_OPT_SACK)
1339                                 printf(" sack");
1340                         if (info->tcpi_options & TCPI_OPT_ECN)
1341                                 printf(" ecn");
1342                 }
1343
1344                 if (tb[INET_DIAG_CONG])
1345                         printf("%s", (char *) RTA_DATA(tb[INET_DIAG_CONG]));
1346
1347                 if (info->tcpi_options & TCPI_OPT_WSCALE)
1348                         printf(" wscale:%d,%d", info->tcpi_snd_wscale,
1349                                info->tcpi_rcv_wscale);
1350                 if (info->tcpi_rto && info->tcpi_rto != 3000000)
1351                         printf(" rto:%g", (double)info->tcpi_rto/1000);
1352                 if (info->tcpi_rtt)
1353                         printf(" rtt:%g/%g", (double)info->tcpi_rtt/1000,
1354                                (double)info->tcpi_rttvar/1000);
1355                 if (info->tcpi_ato)
1356                         printf(" ato:%g", (double)info->tcpi_ato/1000);
1357                 if (info->tcpi_snd_cwnd != 2)
1358                         printf(" cwnd:%d", info->tcpi_snd_cwnd);
1359                 if (info->tcpi_snd_ssthresh < 0xFFFF)
1360                         printf(" ssthresh:%d", info->tcpi_snd_ssthresh);
1361
1362                 rtt = (double) info->tcpi_rtt;
1363                 if (tb[INET_DIAG_VEGASINFO]) {
1364                         const struct tcpvegas_info *vinfo
1365                                 = RTA_DATA(tb[INET_DIAG_VEGASINFO]);
1366
1367                         if (vinfo->tcpv_enabled &&
1368                             vinfo->tcpv_rtt && vinfo->tcpv_rtt != 0x7fffffff)
1369                                 rtt =  vinfo->tcpv_rtt;
1370                 }
1371
1372                 if (rtt > 0 && info->tcpi_snd_mss && info->tcpi_snd_cwnd) {
1373                         printf(" send %sbps",
1374                                sprint_bw(b1, (double) info->tcpi_snd_cwnd *
1375                                          (double) info->tcpi_snd_mss * 8000000.
1376                                          / rtt));
1377                 }
1378
1379                 if (info->tcpi_rcv_rtt)
1380                         printf(" rcv_rtt:%g", (double) info->tcpi_rcv_rtt/1000);
1381                 if (info->tcpi_rcv_space)
1382                         printf(" rcv_space:%d", info->tcpi_rcv_space);
1383
1384         }
1385 }
1386
1387 int tcp_show_sock(struct nlmsghdr *nlh, struct filter *f)
1388 {
1389         struct inet_diag_msg *r = NLMSG_DATA(nlh);
1390         struct tcpstat s;
1391
1392         s.state = r->idiag_state;
1393         s.local.family = s.remote.family = r->idiag_family;
1394         s.lport = ntohs(r->id.idiag_sport);
1395         s.rport = ntohs(r->id.idiag_dport);
1396         if (s.local.family == AF_INET) {
1397                 s.local.bytelen = s.remote.bytelen = 4;
1398         } else {
1399                 s.local.bytelen = s.remote.bytelen = 16;
1400         }
1401         memcpy(s.local.data, r->id.idiag_src, s.local.bytelen);
1402         memcpy(s.remote.data, r->id.idiag_dst, s.local.bytelen);
1403
1404         if (f && f->f && run_ssfilter(f->f, &s) == 0)
1405                 return 0;
1406
1407         if (netid_width)
1408                 printf("%-*s ", netid_width, "tcp");
1409         if (state_width)
1410                 printf("%-*s ", state_width, sstate_name[s.state]);
1411
1412         printf("%-6d %-6d ", r->idiag_rqueue, r->idiag_wqueue);
1413
1414         formatted_print(&s.local, s.lport);
1415         formatted_print(&s.remote, s.rport);
1416
1417         if (show_options) {
1418                 if (r->idiag_timer) {
1419                         if (r->idiag_timer > 4)
1420                                 r->idiag_timer = 5;
1421                         printf(" timer:(%s,%s,%d)",
1422                                tmr_name[r->idiag_timer],
1423                                print_ms_timer(r->idiag_expires),
1424                                r->idiag_retrans);
1425                 }
1426         }
1427         if (show_users) {
1428                 char ubuf[4096];
1429                 if (find_users(r->idiag_inode, ubuf, sizeof(ubuf)) > 0)
1430                         printf(" users:(%s)", ubuf);
1431         }
1432         if (show_details) {
1433                 if (r->idiag_uid)
1434                         printf(" uid:%u", (unsigned)r->idiag_uid);
1435                 printf(" ino:%u", (unsigned)r->idiag_inode);
1436                 printf(" sk:%08x", r->id.idiag_cookie[0]);
1437                 if (r->id.idiag_cookie[1] != 0)
1438                         printf("%08x", r->id.idiag_cookie[1]);
1439         }
1440         if (show_mem || show_tcpinfo) {
1441                 printf("\n\t");
1442                 tcp_show_info(nlh, r);
1443         }
1444
1445         printf("\n");
1446
1447         return 0;
1448 }
1449
1450 int tcp_show_netlink(struct filter *f, FILE *dump_fp, int socktype)
1451 {
1452         int fd;
1453         struct sockaddr_nl nladdr;
1454         struct {
1455                 struct nlmsghdr nlh;
1456                 struct inet_diag_req r;
1457         } req;
1458         char    *bc = NULL;
1459         int     bclen;
1460         struct msghdr msg;
1461         struct rtattr rta;
1462         char    buf[8192];
1463         struct iovec iov[3];
1464
1465         if ((fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_INET_DIAG)) < 0)
1466                 return -1;
1467
1468         memset(&nladdr, 0, sizeof(nladdr));
1469         nladdr.nl_family = AF_NETLINK;
1470
1471         req.nlh.nlmsg_len = sizeof(req);
1472         req.nlh.nlmsg_type = socktype;
1473         req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST;
1474         req.nlh.nlmsg_pid = 0;
1475         req.nlh.nlmsg_seq = 123456;
1476         memset(&req.r, 0, sizeof(req.r));
1477         req.r.idiag_family = AF_INET;
1478         req.r.idiag_states = f->states;
1479         if (show_mem)
1480                 req.r.idiag_ext |= (1<<(INET_DIAG_MEMINFO-1));
1481
1482         if (show_tcpinfo) {
1483                 req.r.idiag_ext |= (1<<(INET_DIAG_INFO-1));
1484                 req.r.idiag_ext |= (1<<(INET_DIAG_VEGASINFO-1));
1485                 req.r.idiag_ext |= (1<<(INET_DIAG_CONG-1));
1486         }
1487
1488         iov[0] = (struct iovec){
1489                 .iov_base = &req,
1490                 .iov_len = sizeof(req)
1491         };
1492         if (f->f) {
1493                 bclen = ssfilter_bytecompile(f->f, &bc);
1494                 rta.rta_type = INET_DIAG_REQ_BYTECODE;
1495                 rta.rta_len = RTA_LENGTH(bclen);
1496                 iov[1] = (struct iovec){ &rta, sizeof(rta) };
1497                 iov[2] = (struct iovec){ bc, bclen };
1498                 req.nlh.nlmsg_len += RTA_LENGTH(bclen);
1499         }
1500
1501         msg = (struct msghdr) {
1502                 .msg_name = (void*)&nladdr,
1503                 .msg_namelen = sizeof(nladdr),
1504                 .msg_iov = iov,
1505                 .msg_iovlen = f->f ? 3 : 1,
1506         };
1507
1508         if (sendmsg(fd, &msg, 0) < 0)
1509                 return -1;
1510
1511         iov[0] = (struct iovec){
1512                 .iov_base = buf,
1513                 .iov_len = sizeof(buf)
1514         };
1515
1516         while (1) {
1517                 int status;
1518                 struct nlmsghdr *h;
1519
1520                 msg = (struct msghdr) {
1521                         (void*)&nladdr, sizeof(nladdr),
1522                         iov,    1,
1523                         NULL,   0,
1524                         0
1525                 };
1526
1527                 status = recvmsg(fd, &msg, 0);
1528
1529                 if (status < 0) {
1530                         if (errno == EINTR)
1531                                 continue;
1532                         perror("OVERRUN");
1533                         continue;
1534                 }
1535                 if (status == 0) {
1536                         fprintf(stderr, "EOF on netlink\n");
1537                         return 0;
1538                 }
1539
1540                 if (dump_fp)
1541                         fwrite(buf, 1, NLMSG_ALIGN(status), dump_fp);
1542
1543                 h = (struct nlmsghdr*)buf;
1544                 while (NLMSG_OK(h, status)) {
1545                         int err;
1546
1547                         if (/*h->nlmsg_pid != rth->local.nl_pid ||*/
1548                             h->nlmsg_seq != 123456)
1549                                 goto skip_it;
1550
1551                         if (h->nlmsg_type == NLMSG_DONE)
1552                                 return 0;
1553                         if (h->nlmsg_type == NLMSG_ERROR) {
1554                                 struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
1555                                 if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
1556                                         fprintf(stderr, "ERROR truncated\n");
1557                                 } else {
1558                                         errno = -err->error;
1559                                         perror("TCPDIAG answers");
1560                                 }
1561                                 return 0;
1562                         }
1563                         if (!dump_fp) {
1564                                 err = tcp_show_sock(h, NULL);
1565                                 if (err < 0)
1566                                         return err;
1567                         }
1568
1569 skip_it:
1570                         h = NLMSG_NEXT(h, status);
1571                 }
1572                 if (msg.msg_flags & MSG_TRUNC) {
1573                         fprintf(stderr, "Message truncated\n");
1574                         continue;
1575                 }
1576                 if (status) {
1577                         fprintf(stderr, "!!!Remnant of size %d\n", status);
1578                         exit(1);
1579                 }
1580         }
1581         return 0;
1582 }
1583
1584 int tcp_show_netlink_file(struct filter *f)
1585 {
1586         FILE    *fp;
1587         char    buf[8192];
1588
1589         if ((fp = fopen(getenv("TCPDIAG_FILE"), "r")) == NULL) {
1590                 perror("fopen($TCPDIAG_FILE)");
1591                 return -1;
1592         }
1593
1594         while (1) {
1595                 int status, err;
1596                 struct nlmsghdr *h = (struct nlmsghdr*)buf;
1597
1598                 status = fread(buf, 1, sizeof(*h), fp);
1599                 if (status < 0) {
1600                         perror("Reading header from $TCPDIAG_FILE");
1601                         return -1;
1602                 }
1603                 if (status != sizeof(*h)) {
1604                         perror("Unexpected EOF reading $TCPDIAG_FILE");
1605                         return -1;
1606                 }
1607
1608                 status = fread(h+1, 1, NLMSG_ALIGN(h->nlmsg_len-sizeof(*h)), fp);
1609
1610                 if (status < 0) {
1611                         perror("Reading $TCPDIAG_FILE");
1612                         return -1;
1613                 }
1614                 if (status + sizeof(*h) < h->nlmsg_len) {
1615                         perror("Unexpected EOF reading $TCPDIAG_FILE");
1616                         return -1;
1617                 }
1618
1619                 /* The only legal exit point */
1620                 if (h->nlmsg_type == NLMSG_DONE)
1621                         return 0;
1622
1623                 if (h->nlmsg_type == NLMSG_ERROR) {
1624                         struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h);
1625                         if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) {
1626                                 fprintf(stderr, "ERROR truncated\n");
1627                         } else {
1628                                 errno = -err->error;
1629                                 perror("TCPDIAG answered");
1630                         }
1631                         return -1;
1632                 }
1633
1634                 err = tcp_show_sock(h, f);
1635                 if (err < 0)
1636                         return err;
1637         }
1638 }
1639
1640 int tcp_show(struct filter *f, int socktype)
1641 {
1642         int fd = -1;
1643         char *buf = NULL;
1644         int bufsize = 64*1024;
1645
1646         dg_proto = TCP_PROTO;
1647
1648         if (getenv("TCPDIAG_FILE"))
1649                 return tcp_show_netlink_file(f);
1650
1651         if (!getenv("PROC_NET_TCP") && !getenv("PROC_ROOT")
1652             && tcp_show_netlink(f, NULL, socktype) == 0)
1653                 return 0;
1654
1655         /* Sigh... We have to parse /proc/net/tcp... */
1656
1657         /* Estimate amount of sockets and try to allocate
1658          * huge buffer to read all the table at one read.
1659          * Limit it by 16MB though. The assumption is: as soon as
1660          * kernel was able to hold information about N connections,
1661          * it is able to give us some memory for snapshot.
1662          */
1663         if (1) {
1664                 int guess = slabstat.socks+slabstat.tcp_syns;
1665                 if (f->states&(1<<SS_TIME_WAIT))
1666                         guess += slabstat.tcp_tws;
1667                 if (guess > (16*1024*1024)/128)
1668                         guess = (16*1024*1024)/128;
1669                 guess *= 128;
1670                 if (guess > bufsize)
1671                         bufsize = guess;
1672         }
1673         while (bufsize >= 64*1024) {
1674                 if ((buf = malloc(bufsize)) != NULL)
1675                         break;
1676                 bufsize /= 2;
1677         }
1678         if (buf == NULL) {
1679                 errno = ENOMEM;
1680                 return -1;
1681         }
1682
1683         if (f->families & (1<<AF_INET)) {
1684                 if ((fd = net_tcp_open()) < 0)
1685                         goto outerr;
1686                 if (generic_record_read(fd, buf, bufsize, tcp_show_line, f, AF_INET))
1687                         goto outerr;
1688                 close(fd);
1689         }
1690
1691         if ((f->families & (1<<AF_INET6)) &&
1692             (fd = net_tcp6_open()) >= 0) {
1693                 if (generic_record_read(fd, buf, bufsize, tcp_show_line, f, AF_INET6))
1694                         goto outerr;
1695                 close(fd);
1696         }
1697
1698         free(buf);
1699         return 0;
1700
1701 outerr:
1702         do {
1703                 int saved_errno = errno;
1704                 if (buf)
1705                         free(buf);
1706                 if (fd >= 0)
1707                         close(fd);
1708                 errno = saved_errno;
1709                 return -1;
1710         } while (0);
1711 }
1712
1713
1714 int dgram_show_line(char *line, struct filter *f, int family)
1715 {
1716         struct tcpstat s;
1717         char *loc, *rem, *data;
1718         char opt[256];
1719         int n;
1720         char *p;
1721
1722         if ((p = strchr(line, ':')) == NULL)
1723                 return -1;
1724         loc = p+2;
1725
1726         if ((p = strchr(loc, ':')) == NULL)
1727                 return -1;
1728         p[5] = 0;
1729         rem = p+6;
1730
1731         if ((p = strchr(rem, ':')) == NULL)
1732                 return -1;
1733         p[5] = 0;
1734         data = p+6;
1735
1736         do {
1737                 int state = (data[1] >= 'A') ? (data[1] - 'A' + 10) : (data[1] - '0');
1738
1739                 if (!(f->states & (1<<state)))
1740                         return 0;
1741         } while (0);
1742
1743         s.local.family = s.remote.family = family;
1744         if (family == AF_INET) {
1745                 sscanf(loc, "%x:%x", s.local.data, (unsigned*)&s.lport);
1746                 sscanf(rem, "%x:%x", s.remote.data, (unsigned*)&s.rport);
1747                 s.local.bytelen = s.remote.bytelen = 4;
1748         } else {
1749                 sscanf(loc, "%08x%08x%08x%08x:%x",
1750                        s.local.data,
1751                        s.local.data+1,
1752                        s.local.data+2,
1753                        s.local.data+3,
1754                        &s.lport);
1755                 sscanf(rem, "%08x%08x%08x%08x:%x",
1756                        s.remote.data,
1757                        s.remote.data+1,
1758                        s.remote.data+2,
1759                        s.remote.data+3,
1760                        &s.rport);
1761                 s.local.bytelen = s.remote.bytelen = 16;
1762         }
1763
1764         if (f->f && run_ssfilter(f->f, &s) == 0)
1765                 return 0;
1766
1767         opt[0] = 0;
1768         n = sscanf(data, "%x %x:%x %*x:%*x %*x %d %*d %d %d %llx %[^\n]\n",
1769                &s.state, &s.wq, &s.rq,
1770                &s.uid, &s.ino,
1771                &s.refcnt, &s.sk, opt);
1772
1773         if (n < 9)
1774                 opt[0] = 0;
1775
1776         if (netid_width)
1777                 printf("%-*s ", netid_width, dg_proto);
1778         if (state_width)
1779                 printf("%-*s ", state_width, sstate_name[s.state]);
1780
1781         printf("%-6d %-6d ", s.rq, s.wq);
1782
1783         formatted_print(&s.local, s.lport);
1784         formatted_print(&s.remote, s.rport);
1785
1786         if (show_users) {
1787                 char ubuf[4096];
1788                 if (find_users(s.ino, ubuf, sizeof(ubuf)) > 0)
1789                         printf(" users:(%s)", ubuf);
1790         }
1791
1792         if (show_details) {
1793                 if (s.uid)
1794                         printf(" uid=%u", (unsigned)s.uid);
1795                 printf(" ino=%u", (unsigned)s.ino);
1796                 printf(" sk=%llx", s.sk);
1797                 if (opt[0])
1798                         printf(" opt:\"%s\"", opt);
1799         }
1800         printf("\n");
1801
1802         return 0;
1803 }
1804
1805
1806 int udp_show(struct filter *f)
1807 {
1808         int fd = -1;
1809         char buf[8192];
1810         int  bufsize = sizeof(buf);
1811
1812         dg_proto = UDP_PROTO;
1813
1814         if (f->families&(1<<AF_INET)) {
1815                 if ((fd = net_udp_open()) < 0)
1816                         goto outerr;
1817                 if (generic_record_read(fd, buf, bufsize, dgram_show_line, f, AF_INET))
1818                         goto outerr;
1819                 close(fd);
1820         }
1821
1822         if ((f->families&(1<<AF_INET6)) &&
1823             (fd = net_udp6_open()) >= 0) {
1824                 if (generic_record_read(fd, buf, bufsize, dgram_show_line, f, AF_INET6))
1825                         goto outerr;
1826                 close(fd);
1827         }
1828         return 0;
1829
1830 outerr:
1831         do {
1832                 int saved_errno = errno;
1833                 if (fd >= 0)
1834                         close(fd);
1835                 errno = saved_errno;
1836                 return -1;
1837         } while (0);
1838 }
1839
1840 int raw_show(struct filter *f)
1841 {
1842         int fd = -1;
1843         char buf[8192];
1844         int  bufsize = sizeof(buf);
1845
1846         dg_proto = RAW_PROTO;
1847
1848         if (f->families&(1<<AF_INET)) {
1849                 if ((fd = net_raw_open()) < 0)
1850                         goto outerr;
1851                 if (generic_record_read(fd, buf, bufsize, dgram_show_line, f, AF_INET))
1852                         goto outerr;
1853                 close(fd);
1854         }
1855
1856         if ((f->families&(1<<AF_INET6)) &&
1857             (fd = net_raw6_open()) >= 0) {
1858                 if (generic_record_read(fd, buf, bufsize, dgram_show_line, f, AF_INET6))
1859                         goto outerr;
1860                 close(fd);
1861         }
1862         return 0;
1863
1864 outerr:
1865         do {
1866                 int saved_errno = errno;
1867                 if (fd >= 0)
1868                         close(fd);
1869                 errno = saved_errno;
1870                 return -1;
1871         } while (0);
1872 }
1873
1874
1875 struct unixstat
1876 {
1877         struct unixstat *next;
1878         int ino;
1879         int peer;
1880         int rq;
1881         int wq;
1882         int state;
1883         int type;
1884         char *name;
1885 };
1886
1887
1888
1889 int unix_state_map[] = { SS_CLOSE, SS_SYN_SENT,
1890                          SS_ESTABLISHED, SS_CLOSING };
1891
1892
1893 #define MAX_UNIX_REMEMBER (1024*1024/sizeof(struct unixstat))
1894
1895 void unix_list_free(struct unixstat *list)
1896 {
1897         while (list) {
1898                 struct unixstat *s = list;
1899                 list = list->next;
1900                 if (s->name)
1901                         free(s->name);
1902                 free(s);
1903         }
1904 }
1905
1906 void unix_list_print(struct unixstat *list, struct filter *f)
1907 {
1908         struct unixstat *s;
1909         char *peer;
1910
1911         for (s = list; s; s = s->next) {
1912                 if (!(f->states & (1<<s->state)))
1913                         continue;
1914                 if (s->type == SOCK_STREAM && !(f->dbs&(1<<UNIX_ST_DB)))
1915                         continue;
1916                 if (s->type == SOCK_DGRAM && !(f->dbs&(1<<UNIX_DG_DB)))
1917                         continue;
1918
1919                 peer = "*";
1920                 if (s->peer) {
1921                         struct unixstat *p;
1922                         for (p = list; p; p = p->next) {
1923                                 if (s->peer == p->ino)
1924                                         break;
1925                         }
1926                         if (!p) {
1927                                 peer = "?";
1928                         } else {
1929                                 peer = p->name ? : "*";
1930                         }
1931                 }
1932
1933                 if (f->f) {
1934                         struct tcpstat tst;
1935                         tst.local.family = AF_UNIX;
1936                         tst.remote.family = AF_UNIX;
1937                         memcpy(tst.local.data, &s->name, sizeof(s->name));
1938                         if (strcmp(peer, "*") == 0)
1939                                 memset(tst.remote.data, 0, sizeof(peer));
1940                         else
1941                                 memcpy(tst.remote.data, &peer, sizeof(peer));
1942                         if (run_ssfilter(f->f, &tst) == 0)
1943                                 continue;
1944                 }
1945
1946                 if (netid_width)
1947                         printf("%-*s ", netid_width,
1948                                s->type == SOCK_STREAM ? "u_str" : "u_dgr");
1949                 if (state_width)
1950                         printf("%-*s ", state_width, sstate_name[s->state]);
1951                 printf("%-6d %-6d ", s->rq, s->wq);
1952                 printf("%*s %-*d %*s %-*d",
1953                        addr_width, s->name ? : "*", serv_width, s->ino,
1954                        addr_width, peer, serv_width, s->peer);
1955                 if (show_users) {
1956                         char ubuf[4096];
1957                         if (find_users(s->ino, ubuf, sizeof(ubuf)) > 0)
1958                                 printf(" users:(%s)", ubuf);
1959                 }
1960                 printf("\n");
1961         }
1962 }
1963
1964 int unix_show(struct filter *f)
1965 {
1966         FILE *fp;
1967         char buf[256];
1968         char name[128];
1969         int  newformat = 0;
1970         int  cnt;
1971         struct unixstat *list = NULL;
1972
1973         if ((fp = fdopen(net_unix_open(), "r")) == NULL)
1974                 return -1;
1975         fgets(buf, sizeof(buf)-1, fp);
1976
1977         if (memcmp(buf, "Peer", 4) == 0)
1978                 newformat = 1;
1979         cnt = 0;
1980
1981         while (fgets(buf, sizeof(buf)-1, fp)) {
1982                 struct unixstat *u, **insp;
1983                 int flags;
1984
1985                 if (!(u = malloc(sizeof(*u))))
1986                         break;
1987                 u->name = NULL;
1988
1989                 if (sscanf(buf, "%x: %x %x %x %x %x %d %s",
1990                            &u->peer, &u->rq, &u->wq, &flags, &u->type,
1991                            &u->state, &u->ino, name) < 8)
1992                         name[0] = 0;
1993
1994                 if (flags&(1<<16)) {
1995                         u->state = SS_LISTEN;
1996                 } else {
1997                         u->state = unix_state_map[u->state-1];
1998                         if (u->type == SOCK_DGRAM &&
1999                             u->state == SS_CLOSE &&
2000                             u->peer)
2001                                 u->state = SS_ESTABLISHED;
2002                 }
2003
2004                 if (!newformat) {
2005                         u->peer = 0;
2006                         u->rq = 0;
2007                         u->wq = 0;
2008                 }
2009
2010                 insp = &list;
2011                 while (*insp) {
2012                         if (u->type < (*insp)->type ||
2013                             (u->type == (*insp)->type &&
2014                              u->ino < (*insp)->ino))
2015                                 break;
2016                         insp = &(*insp)->next;
2017                 }
2018                 u->next = *insp;
2019                 *insp = u;
2020
2021                 if (name[0]) {
2022                         if ((u->name = malloc(strlen(name)+1)) == NULL)
2023                                 break;
2024                         strcpy(u->name, name);
2025                 }
2026                 if (++cnt > MAX_UNIX_REMEMBER) {
2027                         unix_list_print(list, f);
2028                         unix_list_free(list);
2029                         list = NULL;
2030                         cnt = 0;
2031                 }
2032         }
2033
2034         if (list) {
2035                 unix_list_print(list, f);
2036                 unix_list_free(list);
2037                 list = NULL;
2038                 cnt = 0;
2039         }
2040
2041         return 0;
2042 }
2043
2044
2045 int packet_show(struct filter *f)
2046 {
2047         FILE *fp;
2048         char buf[256];
2049         int type;
2050         int prot;
2051         int iface;
2052         int state;
2053         int rq;
2054         int uid;
2055         int ino;
2056         unsigned long long sk;
2057
2058         if (!(f->states & (1<<SS_CLOSE)))
2059                 return 0;
2060
2061         if ((fp = fdopen(net_packet_open(), "r")) == NULL)
2062                 return -1;
2063         fgets(buf, sizeof(buf)-1, fp);
2064
2065         while (fgets(buf, sizeof(buf)-1, fp)) {
2066                 sscanf(buf, "%llx %*d %d %x %d %d %u %u %u",
2067                        &sk,
2068                        &type, &prot, &iface, &state,
2069                        &rq, &uid, &ino);
2070
2071                 if (type == SOCK_RAW && !(f->dbs&(1<<PACKET_R_DB)))
2072                         continue;
2073                 if (type == SOCK_DGRAM && !(f->dbs&(1<<PACKET_DG_DB)))
2074                         continue;
2075                 if (f->f) {
2076                         struct tcpstat tst;
2077                         tst.local.family = AF_PACKET;
2078                         tst.remote.family = AF_PACKET;
2079                         tst.rport = 0;
2080                         tst.lport = iface;
2081                         tst.local.data[0] = prot;
2082                         tst.remote.data[0] = 0;
2083                         if (run_ssfilter(f->f, &tst) == 0)
2084                                 continue;
2085                 }
2086
2087                 if (netid_width)
2088                         printf("%-*s ", netid_width,
2089                                type == SOCK_RAW ? "p_raw" : "p_dgr");
2090                 if (state_width)
2091                         printf("%-*s ", state_width, "UNCONN");
2092                 printf("%-6d %-6d ", rq, 0);
2093                 if (prot == 3) {
2094                         printf("%*s:", addr_width, "*");
2095                 } else {
2096                         char tb[16];
2097                         printf("%*s:", addr_width,
2098                                ll_proto_n2a(htons(prot), tb, sizeof(tb)));
2099                 }
2100                 if (iface == 0) {
2101                         printf("%-*s ", serv_width, "*");
2102                 } else {
2103                         printf("%-*s ", serv_width, xll_index_to_name(iface));
2104                 }
2105                 printf("%*s*%-*s",
2106                        addr_width, "", serv_width, "");
2107
2108                 if (show_users) {
2109                         char ubuf[4096];
2110                         if (find_users(ino, ubuf, sizeof(ubuf)) > 0)
2111                                 printf(" users:(%s)", ubuf);
2112                 }
2113                 if (show_details) {
2114                         printf(" ino=%u uid=%u sk=%llx", ino, uid, sk);
2115                 }
2116                 printf("\n");
2117         }
2118
2119         return 0;
2120 }
2121
2122 int netlink_show(struct filter *f)
2123 {
2124         FILE *fp;
2125         char buf[256];
2126         int prot, pid;
2127         unsigned groups;
2128         int rq, wq, rc;
2129         unsigned long long sk, cb;
2130
2131         if (!(f->states & (1<<SS_CLOSE)))
2132                 return 0;
2133
2134         if ((fp = fdopen(net_netlink_open(), "r")) == NULL)
2135                 return -1;
2136         fgets(buf, sizeof(buf)-1, fp);
2137
2138         while (fgets(buf, sizeof(buf)-1, fp)) {
2139                 sscanf(buf, "%llx %d %d %x %d %d %llx %d",
2140                        &sk,
2141                        &prot, &pid, &groups, &rq, &wq, &cb, &rc);
2142
2143                 if (f->f) {
2144                         struct tcpstat tst;
2145                         tst.local.family = AF_NETLINK;
2146                         tst.remote.family = AF_NETLINK;
2147                         tst.rport = -1;
2148                         tst.lport = pid;
2149                         tst.local.data[0] = prot;
2150                         tst.remote.data[0] = 0;
2151                         if (run_ssfilter(f->f, &tst) == 0)
2152                                 continue;
2153                 }
2154
2155                 if (netid_width)
2156                         printf("%-*s ", netid_width, "nl");
2157                 if (state_width)
2158                         printf("%-*s ", state_width, "UNCONN");
2159                 printf("%-6d %-6d ", rq, wq);
2160                 if (resolve_services && prot == 0)
2161                         printf("%*s:", addr_width, "rtnl");
2162                 else if (resolve_services && prot == 3)
2163                         printf("%*s:", addr_width, "fw");
2164                 else if (resolve_services && prot == 4)
2165                         printf("%*s:", addr_width, "tcpdiag");
2166                 else
2167                         printf("%*d:", addr_width, prot);
2168                 if (pid == -1) {
2169                         printf("%-*s ", serv_width, "*");
2170                 } else if (resolve_services) {
2171                         int done = 0;
2172                         if (!pid) {
2173                                 done = 1;
2174                                 printf("%-*s ", serv_width, "kernel");
2175                         } else if (pid > 0) {
2176                                 char procname[64];
2177                                 FILE *fp;
2178                                 sprintf(procname, "%s/%d/stat",
2179                                         getenv("PROC_ROOT") ? : "/proc", pid);
2180                                 if ((fp = fopen(procname, "r")) != NULL) {
2181                                         if (fscanf(fp, "%*d (%[^)])", procname) == 1) {
2182                                                 sprintf(procname+strlen(procname), "/%d", pid);
2183                                                 printf("%-*s ", serv_width, procname);
2184                                                 done = 1;
2185                                         }
2186                                         fclose(fp);
2187                                 }
2188                         }
2189                         if (!done)
2190                                 printf("%-*d ", serv_width, pid);
2191                 } else {
2192                         printf("%-*d ", serv_width, pid);
2193                 }
2194                 printf("%*s*%-*s",
2195                        addr_width, "", serv_width, "");
2196
2197                 if (show_details) {
2198                         printf(" sk=%llx cb=%llx groups=0x%08x", sk, cb, groups);
2199                 }
2200                 printf("\n");
2201         }
2202
2203         return 0;
2204 }
2205
2206 struct snmpstat
2207 {
2208         int tcp_estab;
2209 };
2210
2211 int get_snmp_int(char *proto, char *key, int *result)
2212 {
2213         char buf[1024];
2214         FILE *fp;
2215         int protolen = strlen(proto);
2216         int keylen = strlen(key);
2217
2218         *result = 0;
2219
2220         if ((fp = fdopen(net_snmp_open(), "r")) == NULL)
2221                 return -1;
2222
2223         while (fgets(buf, sizeof(buf), fp) != NULL) {
2224                 char *p = buf;
2225                 int  pos = 0;
2226                 if (memcmp(buf, proto, protolen))
2227                         continue;
2228                 while ((p = strchr(p, ' ')) != NULL) {
2229                         pos++;
2230                         p++;
2231                         if (memcmp(p, key, keylen) == 0 &&
2232                             (p[keylen] == ' ' || p[keylen] == '\n'))
2233                                 break;
2234                 }
2235                 if (fgets(buf, sizeof(buf), fp) == NULL)
2236                         break;
2237                 if (memcmp(buf, proto, protolen))
2238                         break;
2239                 p = buf;
2240                 while ((p = strchr(p, ' ')) != NULL) {
2241                         p++;
2242                         if (--pos == 0) {
2243                                 sscanf(p, "%d", result);
2244                                 fclose(fp);
2245                                 return 0;
2246                         }
2247                 }
2248         }
2249
2250         fclose(fp);
2251         errno = ESRCH;
2252         return -1;
2253 }
2254
2255
2256 /* Get stats from sockstat */
2257
2258 struct sockstat
2259 {
2260         int socks;
2261         int tcp_mem;
2262         int tcp_total;
2263         int tcp_orphans;
2264         int tcp_tws;
2265         int tcp4_hashed;
2266         int udp4;
2267         int raw4;
2268         int frag4;
2269         int frag4_mem;
2270         int tcp6_hashed;
2271         int udp6;
2272         int raw6;
2273         int frag6;
2274         int frag6_mem;
2275 };
2276
2277 static void get_sockstat_line(char *line, struct sockstat *s)
2278 {
2279         char id[256], rem[256];
2280
2281         if (sscanf(line, "%[^ ] %[^\n]\n", id, rem) != 2)
2282                 return;
2283
2284         if (strcmp(id, "sockets:") == 0)
2285                 sscanf(rem, "%*s%d", &s->socks);
2286         else if (strcmp(id, "UDP:") == 0)
2287                 sscanf(rem, "%*s%d", &s->udp4);
2288         else if (strcmp(id, "UDP6:") == 0)
2289                 sscanf(rem, "%*s%d", &s->udp6);
2290         else if (strcmp(id, "RAW:") == 0)
2291                 sscanf(rem, "%*s%d", &s->raw4);
2292         else if (strcmp(id, "RAW6:") == 0)
2293                 sscanf(rem, "%*s%d", &s->raw6);
2294         else if (strcmp(id, "TCP6:") == 0)
2295                 sscanf(rem, "%*s%d", &s->tcp6_hashed);
2296         else if (strcmp(id, "FRAG:") == 0)
2297                 sscanf(rem, "%*s%d%*s%d", &s->frag4, &s->frag4_mem);
2298         else if (strcmp(id, "FRAG6:") == 0)
2299                 sscanf(rem, "%*s%d%*s%d", &s->frag6, &s->frag6_mem);
2300         else if (strcmp(id, "TCP:") == 0)
2301                 sscanf(rem, "%*s%d%*s%d%*s%d%*s%d%*s%d",
2302                        &s->tcp4_hashed,
2303                        &s->tcp_orphans, &s->tcp_tws, &s->tcp_total, &s->tcp_mem);
2304 }
2305
2306 int get_sockstat(struct sockstat *s)
2307 {
2308         char buf[256];
2309         FILE *fp;
2310
2311         memset(s, 0, sizeof(*s));
2312
2313         if ((fp = fdopen(net_sockstat_open(), "r")) == NULL)
2314                 return -1;
2315         while(fgets(buf, sizeof(buf), fp) != NULL)
2316                 get_sockstat_line(buf, s);
2317         fclose(fp);
2318
2319         if ((fp = fdopen(net_sockstat6_open(), "r")) == NULL)
2320                 return 0;
2321         while(fgets(buf, sizeof(buf), fp) != NULL)
2322                 get_sockstat_line(buf, s);
2323         fclose(fp);
2324
2325         return 0;
2326 }
2327
2328 int print_summary(void)
2329 {
2330         struct sockstat s;
2331         struct snmpstat sn;
2332
2333         if (get_sockstat(&s) < 0)
2334                 perror("ss: get_sockstat");
2335         if (get_snmp_int("Tcp:", "CurrEstab", &sn.tcp_estab) < 0)
2336                 perror("ss: get_snmpstat");
2337
2338         printf("Total: %d (kernel %d)\n", s.socks, slabstat.socks);
2339
2340         printf("TCP:   %d (estab %d, closed %d, orphaned %d, synrecv %d, timewait %d/%d), ports %d\n",
2341                s.tcp_total + slabstat.tcp_syns + s.tcp_tws,
2342                sn.tcp_estab,
2343                s.tcp_total - (s.tcp4_hashed+s.tcp6_hashed-s.tcp_tws),
2344                s.tcp_orphans,
2345                slabstat.tcp_syns,
2346                s.tcp_tws, slabstat.tcp_tws,
2347                slabstat.tcp_ports
2348                );
2349
2350         printf("\n");
2351         printf("Transport Total     IP        IPv6\n");
2352         printf("*         %-9d %-9s %-9s\n", slabstat.socks, "-", "-");
2353         printf("RAW       %-9d %-9d %-9d\n", s.raw4+s.raw6, s.raw4, s.raw6);
2354         printf("UDP       %-9d %-9d %-9d\n", s.udp4+s.udp6, s.udp4, s.udp6);
2355         printf("TCP       %-9d %-9d %-9d\n", s.tcp4_hashed+s.tcp6_hashed, s.tcp4_hashed, s.tcp6_hashed);
2356         printf("INET      %-9d %-9d %-9d\n",
2357                s.raw4+s.udp4+s.tcp4_hashed+
2358                s.raw6+s.udp6+s.tcp6_hashed,
2359                s.raw4+s.udp4+s.tcp4_hashed,
2360                s.raw6+s.udp6+s.tcp6_hashed);
2361         printf("FRAG      %-9d %-9d %-9d\n", s.frag4+s.frag6, s.frag4, s.frag6);
2362
2363         printf("\n");
2364
2365         return 0;
2366 }
2367
2368
2369 static void usage(void) __attribute__((noreturn));
2370
2371 static void usage(void)
2372 {
2373         fprintf(stderr,
2374 "Usage: ss [ OPTIONS ]\n"
2375 "       ss [ OPTIONS ] [ FILTER ]\n"
2376 "   -h, --help          this message\n"
2377 "   -V, --version       output version information\n"
2378 "   -n, --numeric       don't resolve service names\n"
2379 "   -r, --resolve       resolve host names\n"
2380 "   -a, --all           display all sockets\n"
2381 "   -l, --listening     display listening sockets\n"
2382 "   -o, --options       show timer information\n"
2383 "   -e, --extended      show detailed socket information\n"
2384 "   -m, --memory        show socket memory usage\n"
2385 "   -p, --processes     show process using socket\n"
2386 "   -i, --info          show internal TCP information\n"
2387 "   -s, --summary       show socket usage summary\n"
2388 "\n"
2389 "   -4, --ipv4          display only IP version 4 sockets\n"
2390 "   -6, --ipv6          display only IP version 6 sockets\n"
2391 "   -0, --packet        display PACKET sockets\n"
2392 "   -t, --tcp           display only TCP sockets\n"
2393 "   -u, --udp           display only UDP sockets\n"
2394 "   -d, --dccp          display only DCCP sockets\n"
2395 "   -w, --raw           display only RAW sockets\n"
2396 "   -x, --unix          display only Unix domain sockets\n"
2397 "   -f, --family=FAMILY display sockets of type FAMILY\n"
2398 "\n"
2399 "   -A, --query=QUERY\n"
2400 "       QUERY := {all|inet|tcp|udp|raw|unix|packet|netlink}[,QUERY]\n"
2401 "\n"
2402 "   -F, --filter=FILE   read filter information from FILE\n"
2403 "       FILTER := [ state TCP-STATE ] [ EXPRESSION ]\n"
2404                 );
2405         exit(-1);
2406 }
2407
2408
2409 int scan_state(const char *state)
2410 {
2411         int i;
2412         if (strcasecmp(state, "close") == 0 ||
2413             strcasecmp(state, "closed") == 0)
2414                 return (1<<SS_CLOSE);
2415         if (strcasecmp(state, "syn-rcv") == 0)
2416                 return (1<<SS_SYN_RECV);
2417         if (strcasecmp(state, "established") == 0)
2418                 return (1<<SS_ESTABLISHED);
2419         if (strcasecmp(state, "all") == 0)
2420                 return SS_ALL;
2421         if (strcasecmp(state, "connected") == 0)
2422                 return SS_ALL & ~((1<<SS_CLOSE)|(1<<SS_LISTEN));
2423         if (strcasecmp(state, "synchronized") == 0)
2424                 return SS_ALL & ~((1<<SS_CLOSE)|(1<<SS_LISTEN)|(1<<SS_SYN_SENT));
2425         if (strcasecmp(state, "bucket") == 0)
2426                 return (1<<SS_SYN_RECV)|(1<<SS_TIME_WAIT);
2427         if (strcasecmp(state, "big") == 0)
2428                 return SS_ALL & ~((1<<SS_SYN_RECV)|(1<<SS_TIME_WAIT));
2429         for (i=0; i<SS_MAX; i++) {
2430                 if (strcasecmp(state, sstate_namel[i]) == 0)
2431                         return (1<<i);
2432         }
2433         return 0;
2434 }
2435
2436 static const struct option long_opts[] = {
2437         { "numeric", 0, 0, 'n' },
2438         { "resolve", 0, 0, 'r' },
2439         { "options", 0, 0, 'o' },
2440         { "extended", 0, 0, 'e' },
2441         { "memory", 0, 0, 'm' },
2442         { "info", 0, 0, 'i' },
2443         { "processes", 0, 0, 'p' },
2444         { "dccp", 0, 0, 'd' },
2445         { "tcp", 0, 0, 't' },
2446         { "udp", 0, 0, 'u' },
2447         { "raw", 0, 0, 'w' },
2448         { "unix", 0, 0, 'x' },
2449         { "all", 0, 0, 'a' },
2450         { "listening", 0, 0, 'l' },
2451         { "ipv4", 0, 0, '4' },
2452         { "ipv6", 0, 0, '6' },
2453         { "packet", 0, 0, '0' },
2454         { "family", 1, 0, 'f' },
2455         { "socket", 1, 0, 'A' },
2456         { "summary", 0, 0, 's' },
2457         { "diag", 0, 0, 'D' },
2458         { "filter", 1, 0, 'F' },
2459         { "version", 0, 0, 'V' },
2460         { "help", 0, 0, 'h' },
2461         { 0 }
2462
2463 };
2464
2465 int main(int argc, char *argv[])
2466 {
2467         int do_default = 1;
2468         int saw_states = 0;
2469         int saw_query = 0;
2470         int do_summary = 0;
2471         const char *dump_tcpdiag = NULL;
2472         FILE *filter_fp = NULL;
2473         int ch;
2474
2475         memset(&current_filter, 0, sizeof(current_filter));
2476
2477         current_filter.states = default_filter.states;
2478
2479         while ((ch = getopt_long(argc, argv, "dhaletuwxnro460spf:miA:D:F:vV",
2480                                  long_opts, NULL)) != EOF) {
2481                 switch(ch) {
2482                 case 'n':
2483                         resolve_services = 0;
2484                         break;
2485                 case 'r':
2486                         resolve_hosts = 1;
2487                         break;
2488                 case 'o':
2489                         show_options = 1;
2490                         break;
2491                 case 'e':
2492                         show_options = 1;
2493                         show_details++;
2494                         break;
2495                 case 'm':
2496                         show_mem = 1;
2497                         break;
2498                 case 'i':
2499                         show_tcpinfo = 1;
2500                         break;
2501                 case 'p':
2502                         show_users++;
2503                         break;
2504                 case 'd':
2505                         current_filter.dbs |= (1<<DCCP_DB);
2506                         do_default = 0;
2507                         break;
2508                 case 't':
2509                         current_filter.dbs |= (1<<TCP_DB);
2510                         do_default = 0;
2511                         break;
2512                 case 'u':
2513                         current_filter.dbs |= (1<<UDP_DB);
2514                         do_default = 0;
2515                         break;
2516                 case 'w':
2517                         current_filter.dbs |= (1<<RAW_DB);
2518                         do_default = 0;
2519                         break;
2520                 case 'x':
2521                         current_filter.dbs |= UNIX_DBM;
2522                         do_default = 0;
2523                         break;
2524                 case 'a':
2525                         current_filter.states = SS_ALL;
2526                         break;
2527                 case 'l':
2528                         current_filter.states = (1<<SS_LISTEN);
2529                         break;
2530                 case '4':
2531                         preferred_family = AF_INET;
2532                         break;
2533                 case '6':
2534                         preferred_family = AF_INET6;
2535                         break;
2536                 case '0':
2537                         preferred_family = AF_PACKET;
2538                         break;
2539                 case 'f':
2540                         if (strcmp(optarg, "inet") == 0)
2541                                 preferred_family = AF_INET;
2542                         else if (strcmp(optarg, "inet6") == 0)
2543                                 preferred_family = AF_INET6;
2544                         else if (strcmp(optarg, "link") == 0)
2545                                 preferred_family = AF_PACKET;
2546                         else if (strcmp(optarg, "unix") == 0)
2547                                 preferred_family = AF_UNIX;
2548                         else if (strcmp(optarg, "netlink") == 0)
2549                                 preferred_family = AF_NETLINK;
2550                         else if (strcmp(optarg, "help") == 0)
2551                                 usage();
2552                         else {
2553                                 fprintf(stderr, "ss: \"%s\" is invalid family\n", optarg);
2554                                 usage();
2555                         }
2556                         break;
2557                 case 'A':
2558                 {
2559                         char *p, *p1;
2560                         if (!saw_query) {
2561                                 current_filter.dbs = 0;
2562                                 saw_query = 1;
2563                                 do_default = 0;
2564                         }
2565                         p = p1 = optarg;
2566                         do {
2567                                 if ((p1 = strchr(p, ',')) != NULL)
2568                                         *p1 = 0;
2569                                 if (strcmp(p, "all") == 0) {
2570                                         current_filter.dbs = ALL_DB;
2571                                 } else if (strcmp(p, "inet") == 0) {
2572                                         current_filter.dbs |= (1<<TCP_DB)|(1<<DCCP_DB)|(1<<UDP_DB)|(1<<RAW_DB);
2573                                 } else if (strcmp(p, "udp") == 0) {
2574                                         current_filter.dbs |= (1<<UDP_DB);
2575                                 } else if (strcmp(p, "dccp") == 0) {
2576                                         current_filter.dbs |= (1<<DCCP_DB);
2577                                 } else if (strcmp(p, "tcp") == 0) {
2578                                         current_filter.dbs |= (1<<TCP_DB);
2579                                 } else if (strcmp(p, "raw") == 0) {
2580                                         current_filter.dbs |= (1<<RAW_DB);
2581                                 } else if (strcmp(p, "unix") == 0) {
2582                                         current_filter.dbs |= UNIX_DBM;
2583                                 } else if (strcasecmp(p, "unix_stream") == 0 ||
2584                                            strcmp(p, "u_str") == 0) {
2585                                         current_filter.dbs |= (1<<UNIX_ST_DB);
2586                                 } else if (strcasecmp(p, "unix_dgram") == 0 ||
2587                                            strcmp(p, "u_dgr") == 0) {
2588                                         current_filter.dbs |= (1<<UNIX_DG_DB);
2589                                 } else if (strcmp(p, "packet") == 0) {
2590                                         current_filter.dbs |= PACKET_DBM;
2591                                 } else if (strcmp(p, "packet_raw") == 0 ||
2592                                            strcmp(p, "p_raw") == 0) {
2593                                         current_filter.dbs |= (1<<PACKET_R_DB);
2594                                 } else if (strcmp(p, "packet_dgram") == 0 ||
2595                                            strcmp(p, "p_dgr") == 0) {
2596                                         current_filter.dbs |= (1<<PACKET_DG_DB);
2597                                 } else if (strcmp(p, "netlink") == 0) {
2598                                         current_filter.dbs |= (1<<NETLINK_DB);
2599                                 } else {
2600                                         fprintf(stderr, "ss: \"%s\" is illegal socket table id\n", p);
2601                                         usage();
2602                                 }
2603                                 p = p1 + 1;
2604                         } while (p1);
2605                         break;
2606                 }
2607                 case 's':
2608                         do_summary = 1;
2609                         break;
2610                 case 'D':
2611                         dump_tcpdiag = optarg;
2612                         break;
2613                 case 'F':
2614                         if (filter_fp) {
2615                                 fprintf(stderr, "More than one filter file\n");
2616                                 exit(-1);
2617                         }
2618                         if (optarg[0] == '-')
2619                                 filter_fp = stdin;
2620                         else
2621                                 filter_fp = fopen(optarg, "r");
2622                         if (!filter_fp) {
2623                                 perror("fopen filter file");
2624                                 exit(-1);
2625                         }
2626                         break;
2627                 case 'v':
2628                 case 'V':
2629                         printf("ss utility, iproute2-ss%s\n", SNAPSHOT);
2630                         exit(0);
2631                 case 'h':
2632                 case '?':
2633                 default:
2634                         usage();
2635                 }
2636         }
2637
2638         argc -= optind;
2639         argv += optind;
2640
2641         get_slabstat(&slabstat);
2642
2643         if (do_summary) {
2644                 print_summary();
2645                 if (do_default && argc == 0)
2646                         exit(0);
2647         }
2648
2649         if (do_default)
2650                 current_filter.dbs = default_filter.dbs;
2651
2652         if (preferred_family == AF_UNSPEC) {
2653                 if (!(current_filter.dbs&~UNIX_DBM))
2654                         preferred_family = AF_UNIX;
2655                 else if (!(current_filter.dbs&~PACKET_DBM))
2656                         preferred_family = AF_PACKET;
2657                 else if (!(current_filter.dbs&~(1<<NETLINK_DB)))
2658                         preferred_family = AF_NETLINK;
2659         }
2660
2661         if (preferred_family != AF_UNSPEC) {
2662                 int mask2;
2663                 if (preferred_family == AF_INET ||
2664                     preferred_family == AF_INET6) {
2665                         mask2= (1<<TCP_DB);
2666                         if (!do_default)
2667                                 mask2 = (1<<UDP_DB)|(1<<RAW_DB);
2668                 } else if (preferred_family == AF_PACKET) {
2669                         mask2 = PACKET_DBM;
2670                 } else if (preferred_family == AF_UNIX) {
2671                         mask2 = UNIX_DBM;
2672                 } else if (preferred_family == AF_NETLINK) {
2673                         mask2 = (1<<NETLINK_DB);
2674                 } else {
2675                         mask2 = 0;
2676                 }
2677
2678                 if (do_default)
2679                         current_filter.dbs = mask2;
2680                 else
2681                         current_filter.dbs &= mask2;
2682                 current_filter.families = (1<<preferred_family);
2683         } else {
2684                 if (!do_default)
2685                         current_filter.families = ~0;
2686                 else
2687                         current_filter.families = default_filter.families;
2688         }
2689         if (current_filter.dbs == 0) {
2690                 fprintf(stderr, "ss: no socket tables to show with such filter.\n");
2691                 exit(0);
2692         }
2693         if (current_filter.families == 0) {
2694                 fprintf(stderr, "ss: no families to show with such filter.\n");
2695                 exit(0);
2696         }
2697
2698         if (resolve_services && resolve_hosts &&
2699             (current_filter.dbs&(UNIX_DBM|(1<<TCP_DB)|(1<<UDP_DB)|(1<<DCCP_DB))))
2700                 init_service_resolver();
2701
2702         /* Now parse filter... */
2703         if (argc == 0 && filter_fp) {
2704                 if (ssfilter_parse(&current_filter.f, 0, NULL, filter_fp))
2705                         usage();
2706         }
2707
2708         while (argc > 0) {
2709                 if (strcmp(*argv, "state") == 0) {
2710                         NEXT_ARG();
2711                         if (!saw_states)
2712                                 current_filter.states = 0;
2713                         current_filter.states |= scan_state(*argv);
2714                         saw_states = 1;
2715                 } else if (strcmp(*argv, "exclude") == 0 ||
2716                            strcmp(*argv, "excl") == 0) {
2717                         NEXT_ARG();
2718                         if (!saw_states)
2719                                 current_filter.states = SS_ALL;
2720                         current_filter.states &= ~scan_state(*argv);
2721                         saw_states = 1;
2722                 } else {
2723                         if (ssfilter_parse(&current_filter.f, argc, argv, filter_fp))
2724                                 usage();
2725                         break;
2726                 }
2727                 argc--; argv++;
2728         }
2729
2730         if (current_filter.states == 0) {
2731                 fprintf(stderr, "ss: no socket states to show with such filter.\n");
2732                 exit(0);
2733         }
2734
2735         if (dump_tcpdiag) {
2736                 FILE *dump_fp = stdout;
2737                 if (!(current_filter.dbs & (1<<TCP_DB))) {
2738                         fprintf(stderr, "ss: tcpdiag dump requested and no tcp in filter.\n");
2739                         exit(0);
2740                 }
2741                 if (dump_tcpdiag[0] != '-') {
2742                         dump_fp = fopen(dump_tcpdiag, "w");
2743                         if (!dump_tcpdiag) {
2744                                 perror("fopen dump file");
2745                                 exit(-1);
2746                         }
2747                 }
2748                 tcp_show_netlink(&current_filter, dump_fp, TCPDIAG_GETSOCK);
2749                 fflush(dump_fp);
2750                 exit(0);
2751         }
2752
2753         netid_width = 0;
2754         if (current_filter.dbs&(current_filter.dbs-1))
2755                 netid_width = 5;
2756
2757         state_width = 0;
2758         if (current_filter.states&(current_filter.states-1))
2759                 state_width = 10;
2760
2761         screen_width = 80;
2762         if (isatty(STDOUT_FILENO)) {
2763                 struct winsize w;
2764
2765                 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &w) != -1) {
2766                         if (w.ws_col > 0)
2767                                 screen_width = w.ws_col;
2768                 }
2769         }
2770
2771         addrp_width = screen_width;
2772         addrp_width -= netid_width+1;
2773         addrp_width -= state_width+1;
2774         addrp_width -= 14;
2775
2776         if (addrp_width&1) {
2777                 if (netid_width)
2778                         netid_width++;
2779                 else if (state_width)
2780                         state_width++;
2781         }
2782
2783         addrp_width /= 2;
2784         addrp_width--;
2785
2786         serv_width = resolve_services ? 7 : 5;
2787
2788         if (addrp_width < 15+serv_width+1)
2789                 addrp_width = 15+serv_width+1;
2790
2791         addr_width = addrp_width - serv_width - 1;
2792
2793         if (netid_width)
2794                 printf("%-*s ", netid_width, "Netid");
2795         if (state_width)
2796                 printf("%-*s ", state_width, "State");
2797         printf("%-6s %-6s ", "Recv-Q", "Send-Q");
2798
2799         printf("%*s:%-*s %*s:%-*s\n",
2800                addr_width, "Local Address", serv_width, "Port",
2801                addr_width, "Peer Address", serv_width, "Port");
2802
2803 //printf("%08x %08x %08x\n", current_filter.dbs, current_filter.states, current_filter.families);
2804         fflush(stdout);
2805
2806         if (current_filter.dbs & (1<<NETLINK_DB))
2807                 netlink_show(&current_filter);
2808         if (current_filter.dbs & PACKET_DBM)
2809                 packet_show(&current_filter);
2810         if (current_filter.dbs & UNIX_DBM)
2811                 unix_show(&current_filter);
2812         if (current_filter.dbs & (1<<RAW_DB))
2813                 raw_show(&current_filter);
2814         if (current_filter.dbs & (1<<UDP_DB))
2815                 udp_show(&current_filter);
2816         if (current_filter.dbs & (1<<TCP_DB))
2817                 tcp_show(&current_filter, TCPDIAG_GETSOCK);
2818         if (current_filter.dbs & (1<<DCCP_DB))
2819                 tcp_show(&current_filter, DCCPDIAG_GETSOCK);
2820         return 0;
2821 }