--- /dev/null
+/*
+ * q_u32.c U32 filter.
+ *
+ * This program is free software; you can u32istribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
+ * Match mark added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro> [5 nov 2004]
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <syslog.h>
+#include <fcntl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <string.h>
+#include <linux/if.h>
+
+#include "utils.h"
+#include "tc_util.h"
+
+static void explain(void)
+{
+ fprintf(stderr, "Usage: ... u32 [ match SELECTOR ... ] [ link HTID ] [ classid CLASSID ]\n");
+ fprintf(stderr, " [ police POLICE_SPEC ] [ offset OFFSET_SPEC ]\n");
+ fprintf(stderr, " [ ht HTID ] [ hashkey HASHKEY_SPEC ]\n");
+ fprintf(stderr, " [ sample SAMPLE ]\n");
+ fprintf(stderr, "or u32 divisor DIVISOR\n");
+ fprintf(stderr, "\n");
+ fprintf(stderr, "Where: SELECTOR := SAMPLE SAMPLE ...\n");
+ fprintf(stderr, " SAMPLE := { ip | ip6 | udp | tcp | icmp | u{32|16|8} | mark } SAMPLE_ARGS\n");
+ fprintf(stderr, " FILTERID := X:Y:Z\n");
+}
+
+#define usage() return(-1)
+
+int get_u32_handle(__u32 *handle, char *str)
+{
+ __u32 htid=0, hash=0, nodeid=0;
+ char *tmp = strchr(str, ':');
+
+ if (tmp == NULL) {
+ if (memcmp("0x", str, 2) == 0)
+ return get_u32(handle, str, 16);
+ return -1;
+ }
+ htid = strtoul(str, &tmp, 16);
+ if (tmp == str && *str != ':' && *str != 0)
+ return -1;
+ if (htid>=0x1000)
+ return -1;
+ if (*tmp) {
+ str = tmp+1;
+ hash = strtoul(str, &tmp, 16);
+ if (tmp == str && *str != ':' && *str != 0)
+ return -1;
+ if (hash>=0x100)
+ return -1;
+ if (*tmp) {
+ str = tmp+1;
+ nodeid = strtoul(str, &tmp, 16);
+ if (tmp == str && *str != 0)
+ return -1;
+ if (nodeid>=0x1000)
+ return -1;
+ }
+ }
+ *handle = (htid<<20)|(hash<<12)|nodeid;
+ return 0;
+}
+
+char * sprint_u32_handle(__u32 handle, char *buf)
+{
+ int bsize = SPRINT_BSIZE-1;
+ __u32 htid = TC_U32_HTID(handle);
+ __u32 hash = TC_U32_HASH(handle);
+ __u32 nodeid = TC_U32_NODE(handle);
+ char *b = buf;
+
+ if (handle == 0) {
+ snprintf(b, bsize, "none");
+ return b;
+ }
+ if (htid) {
+ int l = snprintf(b, bsize, "%x:", htid>>20);
+ bsize -= l;
+ b += l;
+ }
+ if (nodeid|hash) {
+ if (hash) {
+ int l = snprintf(b, bsize, "%x", hash);
+ bsize -= l;
+ b += l;
+ }
+ if (nodeid) {
+ int l = snprintf(b, bsize, ":%x", nodeid);
+ bsize -= l;
+ b += l;
+ }
+ }
+ if (show_raw)
+ snprintf(b, bsize, "[%08x] ", handle);
+ return buf;
+}
+
+static int pack_key(struct tc_u32_sel *sel, __u32 key, __u32 mask, int off, int offmask)
+{
+ int i;
+ int hwm = sel->nkeys;
+
+ key &= mask;
+
+ for (i=0; i<hwm; i++) {
+ if (sel->keys[i].off == off && sel->keys[i].offmask == offmask) {
+ __u32 intersect = mask&sel->keys[i].mask;
+
+ if ((key^sel->keys[i].val) & intersect)
+ return -1;
+ sel->keys[i].val |= key;
+ sel->keys[i].mask |= mask;
+ return 0;
+ }
+ }
+
+ if (hwm >= 128)
+ return -1;
+ if (off % 4)
+ return -1;
+ sel->keys[hwm].val = key;
+ sel->keys[hwm].mask = mask;
+ sel->keys[hwm].off = off;
+ sel->keys[hwm].offmask = offmask;
+ sel->nkeys++;
+ return 0;
+}
+
+static int pack_key32(struct tc_u32_sel *sel, __u32 key, __u32 mask, int off, int offmask)
+{
+ key = htonl(key);
+ mask = htonl(mask);
+ return pack_key(sel, key, mask, off, offmask);
+}
+
+static int pack_key16(struct tc_u32_sel *sel, __u32 key, __u32 mask, int off, int offmask)
+{
+ if (key > 0xFFFF || mask > 0xFFFF)
+ return -1;
+
+ if ((off & 3) == 0) {
+ key <<= 16;
+ mask <<= 16;
+ }
+ off &= ~3;
+ key = htonl(key);
+ mask = htonl(mask);
+
+ return pack_key(sel, key, mask, off, offmask);
+}
+
+static int pack_key8(struct tc_u32_sel *sel, __u32 key, __u32 mask, int off, int offmask)
+{
+ if (key > 0xFF || mask > 0xFF)
+ return -1;
+
+ if ((off & 3) == 0) {
+ key <<= 24;
+ mask <<= 24;
+ } else if ((off & 3) == 1) {
+ key <<= 16;
+ mask <<= 16;
+ } else if ((off & 3) == 2) {
+ key <<= 8;
+ mask <<= 8;
+ }
+ off &= ~3;
+ key = htonl(key);
+ mask = htonl(mask);
+
+ return pack_key(sel, key, mask, off, offmask);
+}
+
+
+int parse_at(int *argc_p, char ***argv_p, int *off, int *offmask)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ char *p = *argv;
+
+ if (argc <= 0)
+ return -1;
+
+ if (strlen(p) > strlen("nexthdr+") &&
+ memcmp(p, "nexthdr+", strlen("nexthdr+")) == 0) {
+ *offmask = -1;
+ p += strlen("nexthdr+");
+ } else if (matches(*argv, "nexthdr+") == 0) {
+ NEXT_ARG();
+ *offmask = -1;
+ p = *argv;
+ }
+
+ if (get_integer(off, p, 0))
+ return -1;
+ argc--; argv++;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return 0;
+}
+
+
+static int parse_u32(int *argc_p, char ***argv_p, struct tc_u32_sel *sel, int off, int offmask)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ __u32 key;
+ __u32 mask;
+
+ if (argc < 2)
+ return -1;
+
+ if (get_u32(&key, *argv, 0))
+ return -1;
+ argc--; argv++;
+
+ if (get_u32(&mask, *argv, 16))
+ return -1;
+ argc--; argv++;
+
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+
+ res = pack_key32(sel, key, mask, off, offmask);
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_u16(int *argc_p, char ***argv_p, struct tc_u32_sel *sel, int off, int offmask)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ __u32 key;
+ __u32 mask;
+
+ if (argc < 2)
+ return -1;
+
+ if (get_u32(&key, *argv, 0))
+ return -1;
+ argc--; argv++;
+
+ if (get_u32(&mask, *argv, 16))
+ return -1;
+ argc--; argv++;
+
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+ res = pack_key16(sel, key, mask, off, offmask);
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_u8(int *argc_p, char ***argv_p, struct tc_u32_sel *sel, int off, int offmask)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ __u32 key;
+ __u32 mask;
+
+ if (argc < 2)
+ return -1;
+
+ if (get_u32(&key, *argv, 0))
+ return -1;
+ argc--; argv++;
+
+ if (get_u32(&mask, *argv, 16))
+ return -1;
+ argc--; argv++;
+
+ if (key > 0xFF || mask > 0xFF)
+ return -1;
+
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+
+ res = pack_key8(sel, key, mask, off, offmask);
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_ip_addr(int *argc_p, char ***argv_p, struct tc_u32_sel *sel, int off)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ inet_prefix addr;
+ __u32 mask;
+ int offmask = 0;
+
+ if (argc < 1)
+ return -1;
+
+ if (get_prefix_1(&addr, *argv, AF_INET))
+ return -1;
+ argc--; argv++;
+
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+
+ mask = 0;
+ if (addr.bitlen)
+ mask = htonl(0xFFFFFFFF<<(32-addr.bitlen));
+ if (pack_key(sel, addr.data[0], mask, off, offmask) < 0)
+ return -1;
+ res = 0;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_ip6_addr(int *argc_p, char ***argv_p, struct tc_u32_sel *sel, int off)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ int plen = 128;
+ int i;
+ inet_prefix addr;
+ int offmask = 0;
+
+ if (argc < 1)
+ return -1;
+
+ if (get_prefix_1(&addr, *argv, AF_INET6))
+ return -1;
+ argc--; argv++;
+
+ if (argc > 0 && strcmp(argv[0], "at") == 0) {
+ NEXT_ARG();
+ if (parse_at(&argc, &argv, &off, &offmask))
+ return -1;
+ }
+
+ plen = addr.bitlen;
+ for (i=0; i<plen; i+=32) {
+// if (((i+31)&~0x1F)<=plen) {
+ if (((i+31))<=plen) {
+ if ((res = pack_key(sel, addr.data[i/32], 0xFFFFFFFF, off+4*(i/32), offmask)) < 0)
+ return -1;
+ } else if (i<plen) {
+ __u32 mask = htonl(0xFFFFFFFF<<(32-(plen-i)));
+ if ((res = pack_key(sel, addr.data[i/32], mask, off+4*(i/32), offmask)) < 0)
+ return -1;
+ }
+ }
+ res = 0;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_ip(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ if (strcmp(*argv, "src") == 0) {
+ NEXT_ARG();
+ res = parse_ip_addr(&argc, &argv, sel, 12);
+ goto done;
+ }
+ if (strcmp(*argv, "dst") == 0) {
+ NEXT_ARG();
+ res = parse_ip_addr(&argc, &argv, sel, 16);
+ goto done;
+ }
+ if (strcmp(*argv, "tos") == 0 ||
+ matches(*argv, "dsfield") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 1, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "ihl") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 0, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "protocol") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 9, 0);
+ goto done;
+ }
+ if (matches(*argv, "precedence") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 1, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "nofrag") == 0) {
+ argc--; argv++;
+ res = pack_key16(sel, 0, 0x3FFF, 6, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "firstfrag") == 0) {
+ argc--; argv++;
+ res = pack_key16(sel, 0, 0x1FFF, 6, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "df") == 0) {
+ argc--; argv++;
+ res = pack_key16(sel, 0x4000, 0x4000, 6, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "mf") == 0) {
+ argc--; argv++;
+ res = pack_key16(sel, 0x2000, 0x2000, 6, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "dport") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 22, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "sport") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 20, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "icmp_type") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 20, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "icmp_code") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 20, 1);
+ goto done;
+ }
+ return -1;
+
+done:
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_ip6(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ if (strcmp(*argv, "src") == 0) {
+ NEXT_ARG();
+ res = parse_ip6_addr(&argc, &argv, sel, 8);
+ goto done;
+ }
+ if (strcmp(*argv, "dst") == 0) {
+ NEXT_ARG();
+ res = parse_ip6_addr(&argc, &argv, sel, 24);
+ goto done;
+ }
+ if (strcmp(*argv, "priority") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 0, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "protocol") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 6, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "flowlabel") == 0) {
+ NEXT_ARG();
+ res = parse_u32(&argc, &argv, sel, 0, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "dport") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 42, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "sport") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 40, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "icmp_type") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 40, 0);
+ goto done;
+ }
+ if (strcmp(*argv, "icmp_code") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 41, 1);
+ goto done;
+ }
+ return -1;
+
+done:
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+#define parse_tcp parse_udp
+static int parse_udp(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ if (strcmp(*argv, "src") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 0, -1);
+ goto done;
+ }
+ if (strcmp(*argv, "dst") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 2, -1);
+ goto done;
+ }
+ return -1;
+
+done:
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_icmp(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ if (argc < 2)
+ return -1;
+
+ if (strcmp(*argv, "type") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 0, -1);
+ goto done;
+ }
+ if (strcmp(*argv, "code") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 1, -1);
+ goto done;
+ }
+ return -1;
+
+done:
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_mark(int *argc_p, char ***argv_p, struct nlmsghdr *n)
+{
+ int res = -1;
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ struct tc_u32_mark mark;
+
+ if (argc <= 1)
+ return -1;
+
+ if (get_u32(&mark.val, *argv, 0)) {
+ fprintf(stderr, "Illegal \"mark\" value\n");
+ return -1;
+ }
+ NEXT_ARG();
+
+ if (get_u32(&mark.mask, *argv, 0)) {
+ fprintf(stderr, "Illegal \"mark\" mask\n");
+ return -1;
+ }
+ NEXT_ARG();
+
+ if ((mark.val & mark.mask) != mark.val) {
+ fprintf(stderr, "Illegal \"mark\" (impossible combination)\n");
+ return -1;
+ }
+
+ addattr_l(n, MAX_MSG, TCA_U32_MARK, &mark, sizeof(mark));
+ res = 0;
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_selector(int *argc_p, char ***argv_p, struct tc_u32_sel *sel, struct nlmsghdr *n)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+ int res = -1;
+
+ if (argc <= 0)
+ return -1;
+
+ if (matches(*argv, "u32") == 0) {
+ NEXT_ARG();
+ res = parse_u32(&argc, &argv, sel, 0, 0);
+ goto done;
+ }
+ if (matches(*argv, "u16") == 0) {
+ NEXT_ARG();
+ res = parse_u16(&argc, &argv, sel, 0, 0);
+ goto done;
+ }
+ if (matches(*argv, "u8") == 0) {
+ NEXT_ARG();
+ res = parse_u8(&argc, &argv, sel, 0, 0);
+ goto done;
+ }
+ if (matches(*argv, "ip") == 0) {
+ NEXT_ARG();
+ res = parse_ip(&argc, &argv, sel);
+ goto done;
+ }
+ if (matches(*argv, "ip6") == 0) {
+ NEXT_ARG();
+ res = parse_ip6(&argc, &argv, sel);
+ goto done;
+ }
+ if (matches(*argv, "udp") == 0) {
+ NEXT_ARG();
+ res = parse_udp(&argc, &argv, sel);
+ goto done;
+ }
+ if (matches(*argv, "tcp") == 0) {
+ NEXT_ARG();
+ res = parse_tcp(&argc, &argv, sel);
+ goto done;
+ }
+ if (matches(*argv, "icmp") == 0) {
+ NEXT_ARG();
+ res = parse_icmp(&argc, &argv, sel);
+ goto done;
+ }
+ if (matches(*argv, "mark") == 0) {
+ NEXT_ARG();
+ res = parse_mark(&argc, &argv, n);
+ goto done;
+ }
+
+ return -1;
+
+done:
+ *argc_p = argc;
+ *argv_p = argv;
+ return res;
+}
+
+static int parse_offset(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ while (argc > 0) {
+ if (matches(*argv, "plus") == 0) {
+ int off;
+ NEXT_ARG();
+ if (get_integer(&off, *argv, 0))
+ return -1;
+ sel->off = off;
+ sel->flags |= TC_U32_OFFSET;
+ } else if (matches(*argv, "at") == 0) {
+ int off;
+ NEXT_ARG();
+ if (get_integer(&off, *argv, 0))
+ return -1;
+ sel->offoff = off;
+ if (off%2) {
+ fprintf(stderr, "offset \"at\" must be even\n");
+ return -1;
+ }
+ sel->flags |= TC_U32_VAROFFSET;
+ } else if (matches(*argv, "mask") == 0) {
+ __u16 mask;
+ NEXT_ARG();
+ if (get_u16(&mask, *argv, 16))
+ return -1;
+ sel->offmask = htons(mask);
+ sel->flags |= TC_U32_VAROFFSET;
+ } else if (matches(*argv, "shift") == 0) {
+ int shift;
+ NEXT_ARG();
+ if (get_integer(&shift, *argv, 0))
+ return -1;
+ sel->offshift = shift;
+ sel->flags |= TC_U32_VAROFFSET;
+ } else if (matches(*argv, "eat") == 0) {
+ sel->flags |= TC_U32_EAT;
+ } else {
+ break;
+ }
+ argc--; argv++;
+ }
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return 0;
+}
+
+static int parse_hashkey(int *argc_p, char ***argv_p, struct tc_u32_sel *sel)
+{
+ int argc = *argc_p;
+ char **argv = *argv_p;
+
+ while (argc > 0) {
+ if (matches(*argv, "mask") == 0) {
+ __u32 mask;
+ NEXT_ARG();
+ if (get_u32(&mask, *argv, 16))
+ return -1;
+ sel->hmask = htonl(mask);
+ } else if (matches(*argv, "at") == 0) {
+ int num;
+ NEXT_ARG();
+ if (get_integer(&num, *argv, 0))
+ return -1;
+ if (num%4)
+ return -1;
+ sel->hoff = num;
+ } else {
+ break;
+ }
+ argc--; argv++;
+ }
+
+ *argc_p = argc;
+ *argv_p = argv;
+ return 0;
+}
+
+static int u32_parse_opt(struct filter_util *qu, char *handle, int argc, char **argv, struct nlmsghdr *n)
+{
+ struct {
+ struct tc_u32_sel sel;
+ struct tc_u32_key keys[128];
+ } sel;
+ struct tcmsg *t = NLMSG_DATA(n);
+ struct rtattr *tail;
+ int sel_ok = 0;
+ int sample_ok = 0;
+ __u32 htid = 0;
+ __u32 order = 0;
+
+ memset(&sel, 0, sizeof(sel));
+
+ if (handle && get_u32_handle(&t->tcm_handle, handle)) {
+ fprintf(stderr, "Illegal filter ID\n");
+ return -1;
+ }
+
+ if (argc == 0)
+ return 0;
+
+ tail = NLMSG_TAIL(n);
+ addattr_l(n, MAX_MSG, TCA_OPTIONS, NULL, 0);
+
+ while (argc > 0) {
+ if (matches(*argv, "match") == 0) {
+ NEXT_ARG();
+ if (parse_selector(&argc, &argv, &sel.sel, n)) {
+ fprintf(stderr, "Illegal \"match\"\n");
+ return -1;
+ }
+ sel_ok++;
+ continue;
+ } else if (matches(*argv, "offset") == 0) {
+ NEXT_ARG();
+ if (parse_offset(&argc, &argv, &sel.sel)) {
+ fprintf(stderr, "Illegal \"offset\"\n");
+ return -1;
+ }
+ continue;
+ } else if (matches(*argv, "hashkey") == 0) {
+ NEXT_ARG();
+ if (parse_hashkey(&argc, &argv, &sel.sel)) {
+ fprintf(stderr, "Illegal \"hashkey\"\n");
+ return -1;
+ }
+ continue;
+ } else if (matches(*argv, "classid") == 0 ||
+ strcmp(*argv, "flowid") == 0) {
+ unsigned handle;
+ NEXT_ARG();
+ if (get_tc_classid(&handle, *argv)) {
+ fprintf(stderr, "Illegal \"classid\"\n");
+ return -1;
+ }
+ addattr_l(n, MAX_MSG, TCA_U32_CLASSID, &handle, 4);
+ sel.sel.flags |= TC_U32_TERMINAL;
+ } else if (matches(*argv, "divisor") == 0) {
+ unsigned divisor;
+ NEXT_ARG();
+ if (get_unsigned(&divisor, *argv, 0) || divisor == 0 ||
+ divisor > 0x100) {
+ fprintf(stderr, "Illegal \"divisor\"\n");
+ return -1;
+ }
+ addattr_l(n, MAX_MSG, TCA_U32_DIVISOR, &divisor, 4);
+ } else if (matches(*argv, "order") == 0) {
+ NEXT_ARG();
+ if (get_u32(&order, *argv, 0)) {
+ fprintf(stderr, "Illegal \"order\"\n");
+ return -1;
+ }
+ } else if (strcmp(*argv, "link") == 0) {
+ unsigned handle;
+ NEXT_ARG();
+ if (get_u32_handle(&handle, *argv)) {
+ fprintf(stderr, "Illegal \"link\"\n");
+ return -1;
+ }
+ if (handle && TC_U32_NODE(handle)) {
+ fprintf(stderr, "\"link\" must be a hash table.\n");
+ return -1;
+ }
+ addattr_l(n, MAX_MSG, TCA_U32_LINK, &handle, 4);
+ } else if (strcmp(*argv, "ht") == 0) {
+ unsigned handle;
+ NEXT_ARG();
+ if (get_u32_handle(&handle, *argv)) {
+ fprintf(stderr, "Illegal \"ht\"\n");
+ return -1;
+ }
+ if (handle && TC_U32_NODE(handle)) {
+ fprintf(stderr, "\"ht\" must be a hash table.\n");
+ return -1;
+ }
+ if (sample_ok)
+ htid = (htid&0xFF000)|(handle&0xFFF00000);
+ else
+ htid = (handle&0xFFFFF000);
+ } else if (strcmp(*argv, "sample") == 0) {
+ __u32 hash;
+ struct {
+ struct tc_u32_sel sel;
+ struct tc_u32_key keys[4];
+ } sel2;
+ NEXT_ARG();
+ if (parse_selector(&argc, &argv, &sel2.sel, n)) {
+ fprintf(stderr, "Illegal \"sample\"\n");
+ return -1;
+ }
+ if (sel2.sel.nkeys != 1) {
+ fprintf(stderr, "\"sample\" must contain exactly ONE key.\n");
+ return -1;
+ }
+ hash = sel2.sel.keys[0].val&sel2.sel.keys[0].mask;
+ hash ^= hash>>16;
+ hash ^= hash>>8;
+ htid = ((hash<<12)&0xFF000)|(htid&0xFFF00000);
+ sample_ok = 1;
+ continue;
+ } else if (strcmp(*argv, "indev") == 0) {
+ char ind[IFNAMSIZ + 1];
+ memset(ind, 0, sizeof (ind));
+ argc--;
+ argv++;
+ if (argc < 1) {
+ fprintf(stderr, "Illegal indev\n");
+ return -1;
+ }
+ strncpy(ind, *argv, sizeof (ind) - 1);
+ addattr_l(n, MAX_MSG, TCA_U32_INDEV, ind, strlen(ind) + 1);
+
+ } else if (matches(*argv, "action") == 0) {
+ NEXT_ARG();
+ if (parse_action(&argc, &argv, TCA_U32_ACT, n)) {
+ fprintf(stderr, "Illegal \"action\"\n");
+ return -1;
+ }
+ continue;
+
+ } else if (matches(*argv, "police") == 0) {
+ NEXT_ARG();
+ if (parse_police(&argc, &argv, TCA_U32_POLICE, n)) {
+ fprintf(stderr, "Illegal \"police\"\n");
+ return -1;
+ }
+ continue;
+ } else if (strcmp(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "What is \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--; argv++;
+ }
+
+ if (order) {
+ if (TC_U32_NODE(t->tcm_handle) && order != TC_U32_NODE(t->tcm_handle)) {
+ fprintf(stderr, "\"order\" contradicts \"handle\"\n");
+ return -1;
+ }
+ t->tcm_handle |= order;
+ }
+
+ if (htid)
+ addattr_l(n, MAX_MSG, TCA_U32_HASH, &htid, 4);
+ if (sel_ok)
+ addattr_l(n, MAX_MSG, TCA_U32_SEL, &sel, sizeof(sel.sel)+sel.sel.nkeys*sizeof(struct tc_u32_key));
+ tail->rta_len = (void *) NLMSG_TAIL(n) - (void *) tail;
+ return 0;
+}
+
+static int u32_print_opt(struct filter_util *qu, FILE *f, struct rtattr *opt, __u32 handle)
+{
+ struct rtattr *tb[TCA_U32_MAX+1];
+ struct tc_u32_sel *sel = NULL;
+ struct tc_u32_pcnt *pf = NULL;
+
+ if (opt == NULL)
+ return 0;
+
+ parse_rtattr_nested(tb, TCA_U32_MAX, opt);
+
+ if (handle) {
+ SPRINT_BUF(b1);
+ fprintf(f, "fh %s ", sprint_u32_handle(handle, b1));
+ }
+ if (TC_U32_NODE(handle)) {
+ fprintf(f, "order %d ", TC_U32_NODE(handle));
+ }
+
+ if (tb[TCA_U32_SEL]) {
+ if (RTA_PAYLOAD(tb[TCA_U32_SEL]) < sizeof(*sel))
+ return -1;
+
+ sel = RTA_DATA(tb[TCA_U32_SEL]);
+ }
+
+ if (tb[TCA_U32_DIVISOR]) {
+ fprintf(f, "ht divisor %d ", *(__u32*)RTA_DATA(tb[TCA_U32_DIVISOR]));
+ } else if (tb[TCA_U32_HASH]) {
+ __u32 htid = *(__u32*)RTA_DATA(tb[TCA_U32_HASH]);
+ fprintf(f, "key ht %x bkt %x ", TC_U32_USERHTID(htid), TC_U32_HASH(htid));
+ } else {
+ fprintf(f, "??? ");
+ }
+ if (tb[TCA_U32_CLASSID]) {
+ SPRINT_BUF(b1);
+ fprintf(f, "%sflowid %s ",
+ !sel || !(sel->flags&TC_U32_TERMINAL) ? "*" : "",
+ sprint_tc_classid(*(__u32*)RTA_DATA(tb[TCA_U32_CLASSID]), b1));
+ } else if (sel && sel->flags&TC_U32_TERMINAL) {
+ fprintf(f, "terminal flowid ??? ");
+ }
+ if (tb[TCA_U32_LINK]) {
+ SPRINT_BUF(b1);
+ fprintf(f, "link %s ", sprint_u32_handle(*(__u32*)RTA_DATA(tb[TCA_U32_LINK]), b1));
+ }
+
+ if (tb[TCA_U32_PCNT]) {
+ if (RTA_PAYLOAD(tb[TCA_U32_PCNT]) < sizeof(*pf)) {
+ fprintf(f, "Broken perf counters \n");
+ return -1;
+ }
+ pf = RTA_DATA(tb[TCA_U32_PCNT]);
+ }
+
+ if (sel && show_stats && NULL != pf)
+ fprintf(f, " (rule hit %llu success %llu)",
+ (unsigned long long) pf->rcnt,
+ (unsigned long long) pf->rhit);
+
+ if (tb[TCA_U32_MARK]) {
+ struct tc_u32_mark *mark = RTA_DATA(tb[TCA_U32_MARK]);
+ if (RTA_PAYLOAD(tb[TCA_U32_MARK]) < sizeof(*mark)) {
+ fprintf(f, "\n Invalid mark (kernel&iproute2 mismatch)\n");
+ } else {
+ fprintf(f, "\n mark 0x%04x 0x%04x (success %d)",
+ mark->val, mark->mask, mark->success);
+ }
+ }
+
+ if (sel) {
+ int i;
+ struct tc_u32_key *key = sel->keys;
+ if (sel->nkeys) {
+ for (i=0; i<sel->nkeys; i++, key++) {
+ fprintf(f, "\n match %08x/%08x at %s%d",
+ (unsigned int)ntohl(key->val),
+ (unsigned int)ntohl(key->mask),
+ key->offmask ? "nexthdr+" : "",
+ key->off);
+ if (show_stats && NULL != pf)
+ fprintf(f, " (success %lld ) ",
+ (unsigned long long) pf->kcnts[i]);
+ }
+ }
+
+ if (sel->flags&(TC_U32_VAROFFSET|TC_U32_OFFSET)) {
+ fprintf(f, "\n offset ");
+ if (sel->flags&TC_U32_VAROFFSET)
+ fprintf(f, "%04x>>%d at %d ", ntohs(sel->offmask), sel->offshift, sel->offoff);
+ if (sel->off)
+ fprintf(f, "plus %d ", sel->off);
+ }
+ if (sel->flags&TC_U32_EAT)
+ fprintf(f, " eat ");
+
+ if (sel->hmask) {
+ fprintf(f, "\n hash mask %08x at %d ",
+ (unsigned int)htonl(sel->hmask), sel->hoff);
+ }
+ }
+
+ if (tb[TCA_U32_POLICE]) {
+ fprintf(f, "\n");
+ tc_print_police(f, tb[TCA_U32_POLICE]);
+ }
+ if (tb[TCA_U32_INDEV]) {
+ struct rtattr *idev = tb[TCA_U32_INDEV];
+ fprintf(f, "\n input dev %s\n", (char *) RTA_DATA(idev));
+ }
+ if (tb[TCA_U32_ACT]) {
+ tc_print_action(f, tb[TCA_U32_ACT]);
+ }
+
+ return 0;
+}
+
+struct filter_util u32_filter_util = {
+ .id = "u32",
+ .parse_fopt = u32_parse_opt,
+ .print_fopt = u32_print_opt,
+};