+++ /dev/null
-/*
- * arpd.c ARP helper daemon.
- *
- * This program is free software; you can redistribute 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>
- */
-
-#include <stdio.h>
-#include <syslog.h>
-#include <malloc.h>
-#include <string.h>
-#include <unistd.h>
-#include <stdlib.h>
-#include <netdb.h>
-#include <db_185.h>
-#include <sys/ioctl.h>
-#include <sys/poll.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <sys/uio.h>
-#include <sys/socket.h>
-#include <sys/time.h>
-#include <time.h>
-#include <signal.h>
-#include <linux/if.h>
-#include <linux/if_ether.h>
-#include <linux/if_arp.h>
-#include <netinet/in.h>
-#include <arpa/inet.h>
-#include <linux/if_packet.h>
-#include <linux/filter.h>
-
-#include "libnetlink.h"
-#include "utils.h"
-
-int resolve_hosts;
-
-DB *dbase;
-char *dbname = "/var/lib/arpd/arpd.db";
-
-int ifnum;
-int *ifvec;
-char **ifnames;
-
-struct dbkey
-{
- __u32 iface;
- __u32 addr;
-};
-
-#define IS_NEG(x) (((__u8*)(x))[0] == 0xFF)
-#define NEG_TIME(x) (((x)[2]<<24)|((x)[3]<<16)|((x)[4]<<8)|(x)[5])
-#define NEG_AGE(x) ((__u32)time(NULL) - NEG_TIME((__u8*)x))
-#define NEG_VALID(x) (NEG_AGE(x) < negative_timeout)
-#define NEG_CNT(x) (((__u8*)(x))[1])
-
-struct rtnl_handle rth;
-
-struct pollfd pset[2];
-int udp_sock = -1;
-
-volatile int do_exit;
-volatile int do_sync;
-volatile int do_stats;
-
-struct {
- unsigned long arp_new;
- unsigned long arp_change;
-
- unsigned long app_recv;
- unsigned long app_success;
- unsigned long app_bad;
- unsigned long app_neg;
- unsigned long app_suppressed;
-
- unsigned long kern_neg;
- unsigned long kern_new;
- unsigned long kern_change;
-
- unsigned long probes_sent;
- unsigned long probes_suppressed;
-} stats;
-
-int active_probing;
-int negative_timeout = 60;
-int no_kernel_broadcasts;
-int broadcast_rate = 1000;
-int broadcast_burst = 3000;
-
-void usage(void)
-{
- fprintf(stderr,
-"Usage: arpd [ -lk ] [ -a N ] [ -b dbase ] [ -f file ] [ interfaces ]\n");
- exit(1);
-}
-
-int handle_if(int ifindex)
-{
- int i;
-
- if (ifnum == 0)
- return 1;
-
- for (i=0; i<ifnum; i++)
- if (ifvec[i] == ifindex)
- return 1;
- return 0;
-}
-
-int sysctl_adjusted;
-
-void do_sysctl_adjustments(void)
-{
- int i;
-
- if (!ifnum)
- return;
-
- for (i=0; i<ifnum; i++) {
- char buf[128];
- FILE *fp;
-
- if (active_probing) {
- sprintf(buf, "/proc/sys/net/ipv4/neigh/%s/mcast_solicit", ifnames[i]);
- if ((fp = fopen(buf, "w")) != NULL) {
- if (no_kernel_broadcasts)
- strcpy(buf, "0\n");
- else
- sprintf(buf, "%d\n", active_probing>=2 ? 1 : 3-active_probing);
- fputs(buf, fp);
- fclose(fp);
- }
- }
-
- sprintf(buf, "/proc/sys/net/ipv4/neigh/%s/app_solicit", ifnames[i]);
- if ((fp = fopen(buf, "w")) != NULL) {
- sprintf(buf, "%d\n", active_probing<=1 ? 1 : active_probing);
- fputs(buf, fp);
- fclose(fp);
- }
- }
- sysctl_adjusted = 1;
-}
-
-void undo_sysctl_adjustments(void)
-{
- int i;
-
- if (!sysctl_adjusted)
- return;
-
- for (i=0; i<ifnum; i++) {
- char buf[128];
- FILE *fp;
-
- if (active_probing) {
- sprintf(buf, "/proc/sys/net/ipv4/neigh/%s/mcast_solicit", ifnames[i]);
- if ((fp = fopen(buf, "w")) != NULL) {
- strcpy(buf, "3\n");
- fputs(buf, fp);
- fclose(fp);
- }
- }
- sprintf(buf, "/proc/sys/net/ipv4/neigh/%s/app_solicit", ifnames[i]);
- if ((fp = fopen(buf, "w")) != NULL) {
- strcpy(buf, "0\n");
- fputs(buf, fp);
- fclose(fp);
- }
- }
- sysctl_adjusted = 0;
-}
-
-
-int send_probe(int ifindex, __u32 addr)
-{
- struct ifreq ifr;
- struct sockaddr_in dst;
- socklen_t len;
- unsigned char buf[256];
- struct arphdr *ah = (struct arphdr*)buf;
- unsigned char *p = (unsigned char *)(ah+1);
- struct sockaddr_ll sll;
-
- memset(&ifr, 0, sizeof(ifr));
- ifr.ifr_ifindex = ifindex;
- if (ioctl(udp_sock, SIOCGIFNAME, &ifr))
- return -1;
- if (ioctl(udp_sock, SIOCGIFHWADDR, &ifr))
- return -1;
- if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER)
- return -1;
- if (setsockopt(udp_sock, SOL_SOCKET, SO_BINDTODEVICE, ifr.ifr_name, strlen(ifr.ifr_name)+1) < 0)
- return -1;
-
- dst.sin_family = AF_INET;
- dst.sin_port = htons(1025);
- dst.sin_addr.s_addr = addr;
- if (connect(udp_sock, (struct sockaddr*)&dst, sizeof(dst)) < 0)
- return -1;
- len = sizeof(dst);
- if (getsockname(udp_sock, (struct sockaddr*)&dst, &len) < 0)
- return -1;
-
- ah->ar_hrd = htons(ifr.ifr_hwaddr.sa_family);
- ah->ar_pro = htons(ETH_P_IP);
- ah->ar_hln = 6;
- ah->ar_pln = 4;
- ah->ar_op = htons(ARPOP_REQUEST);
-
- memcpy(p, ifr.ifr_hwaddr.sa_data, ah->ar_hln);
- p += ah->ar_hln;
-
- memcpy(p, &dst.sin_addr, 4);
- p+=4;
-
- sll.sll_family = AF_PACKET;
- memset(sll.sll_addr, 0xFF, sizeof(sll.sll_addr));
- sll.sll_ifindex = ifindex;
- sll.sll_protocol = htons(ETH_P_ARP);
- memcpy(p, &sll.sll_addr, ah->ar_hln);
- p+=ah->ar_hln;
-
- memcpy(p, &addr, 4);
- p+=4;
-
- if (sendto(pset[0].fd, buf, p-buf, 0, (struct sockaddr*)&sll, sizeof(sll)) < 0)
- return -1;
- stats.probes_sent++;
- return 0;
-}
-
-/* Be very tough on sending probes: 1 per second with burst of 3. */
-
-int queue_active_probe(int ifindex, __u32 addr)
-{
- static struct timeval prev;
- static int buckets;
- struct timeval now;
-
- gettimeofday(&now, NULL);
- if (prev.tv_sec) {
- int diff = (now.tv_sec-prev.tv_sec)*1000+(now.tv_usec-prev.tv_usec)/1000;
- buckets += diff;
- } else {
- buckets = broadcast_burst;
- }
- if (buckets > broadcast_burst)
- buckets = broadcast_burst;
- if (buckets >= broadcast_rate && !send_probe(ifindex, addr)) {
- buckets -= broadcast_rate;
- prev = now;
- return 0;
- }
- stats.probes_suppressed++;
- return -1;
-}
-
-int respond_to_kernel(int ifindex, __u32 addr, char *lla, int llalen)
-{
- struct {
- struct nlmsghdr n;
- struct ndmsg ndm;
- char buf[256];
- } req;
-
- memset(&req.n, 0, sizeof(req.n));
- memset(&req.ndm, 0, sizeof(req.ndm));
-
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ndmsg));
- req.n.nlmsg_flags = NLM_F_REQUEST;
- req.n.nlmsg_type = RTM_NEWNEIGH;
- req.ndm.ndm_family = AF_INET;
- req.ndm.ndm_state = NUD_STALE;
- req.ndm.ndm_ifindex = ifindex;
- req.ndm.ndm_type = RTN_UNICAST;
-
- addattr_l(&req.n, sizeof(req), NDA_DST, &addr, 4);
- addattr_l(&req.n, sizeof(req), NDA_LLADDR, lla, llalen);
- return rtnl_send(&rth, (char*)&req, req.n.nlmsg_len) <= 0;
-}
-
-void prepare_neg_entry(__u8 *ndata, __u32 stamp)
-{
- ndata[0] = 0xFF;
- ndata[1] = 0;
- ndata[2] = stamp>>24;
- ndata[3] = stamp>>16;
- ndata[4] = stamp>>8;
- ndata[5] = stamp;
-}
-
-
-int do_one_request(struct nlmsghdr *n)
-{
- struct ndmsg *ndm = NLMSG_DATA(n);
- int len = n->nlmsg_len;
- struct rtattr * tb[NDA_MAX+1];
- struct dbkey key;
- DBT dbkey, dbdat;
- int do_acct = 0;
-
- if (n->nlmsg_type == NLMSG_DONE) {
- dbase->sync(dbase, 0);
-
- /* Now we have at least mirror of kernel db, so that
- * may start real resolution.
- */
- do_sysctl_adjustments();
- return 0;
- }
-
- if (n->nlmsg_type != RTM_GETNEIGH && n->nlmsg_type != RTM_NEWNEIGH)
- return 0;
-
- len -= NLMSG_LENGTH(sizeof(*ndm));
- if (len < 0)
- return -1;
-
- if (ndm->ndm_family != AF_INET ||
- (ifnum && !handle_if(ndm->ndm_ifindex)) ||
- ndm->ndm_flags ||
- ndm->ndm_type != RTN_UNICAST ||
- !(ndm->ndm_state&~NUD_NOARP))
- return 0;
-
- parse_rtattr(tb, NDA_MAX, NDA_RTA(ndm), len);
-
- if (!tb[NDA_DST])
- return 0;
-
- key.iface = ndm->ndm_ifindex;
- memcpy(&key.addr, RTA_DATA(tb[NDA_DST]), 4);
- dbkey.data = &key;
- dbkey.size = sizeof(key);
-
- if (dbase->get(dbase, &dbkey, &dbdat, 0) != 0) {
- dbdat.data = 0;
- dbdat.size = 0;
- }
-
- if (n->nlmsg_type == RTM_GETNEIGH) {
- if (!(n->nlmsg_flags&NLM_F_REQUEST))
- return 0;
-
- if (!(ndm->ndm_state&(NUD_PROBE|NUD_INCOMPLETE))) {
- stats.app_bad++;
- return 0;
- }
-
- if (ndm->ndm_state&NUD_PROBE) {
- /* If we get this, kernel still has some valid
- * address, but unicast probing failed and host
- * is either dead or changed its mac address.
- * Kernel is going to initiate broadcast resolution.
- * OK, we invalidate our information as well.
- */
- if (dbdat.data && !IS_NEG(dbdat.data))
- stats.app_neg++;
-
- dbase->del(dbase, &dbkey, 0);
- } else {
- /* If we get this kernel does not have any information.
- * If we have something tell this to kernel. */
- stats.app_recv++;
- if (dbdat.data && !IS_NEG(dbdat.data)) {
- stats.app_success++;
- respond_to_kernel(key.iface, key.addr, dbdat.data, dbdat.size);
- return 0;
- }
-
- /* Sheeit! We have nothing to tell. */
- /* If we have recent negative entry, be silent. */
- if (dbdat.data && NEG_VALID(dbdat.data)) {
- if (NEG_CNT(dbdat.data) >= active_probing) {
- stats.app_suppressed++;
- return 0;
- }
- do_acct = 1;
- }
- }
-
- if (active_probing &&
- queue_active_probe(ndm->ndm_ifindex, key.addr) == 0 &&
- do_acct) {
- NEG_CNT(dbdat.data)++;
- dbase->put(dbase, &dbkey, &dbdat, 0);
- }
- } else if (n->nlmsg_type == RTM_NEWNEIGH) {
- if (n->nlmsg_flags&NLM_F_REQUEST)
- return 0;
-
- if (ndm->ndm_state&NUD_FAILED) {
- /* Kernel was not able to resolve. Host is dead.
- * Create negative entry if it is not present
- * or renew it if it is too old. */
- if (!dbdat.data ||
- !IS_NEG(dbdat.data) ||
- !NEG_VALID(dbdat.data)) {
- __u8 ndata[6];
- stats.kern_neg++;
- prepare_neg_entry(ndata, time(NULL));
- dbdat.data = ndata;
- dbdat.size = sizeof(ndata);
- dbase->put(dbase, &dbkey, &dbdat, 0);
- }
- } else if (tb[NDA_LLADDR]) {
- if (dbdat.data && !IS_NEG(dbdat.data)) {
- if (memcmp(RTA_DATA(tb[NDA_LLADDR]), dbdat.data, dbdat.size) == 0)
- return 0;
- stats.kern_change++;
- } else {
- stats.kern_new++;
- }
- dbdat.data = RTA_DATA(tb[NDA_LLADDR]);
- dbdat.size = RTA_PAYLOAD(tb[NDA_LLADDR]);
- dbase->put(dbase, &dbkey, &dbdat, 0);
- }
- }
- return 0;
-}
-
-void load_initial_table(void)
-{
- rtnl_wilddump_request(&rth, AF_INET, RTM_GETNEIGH);
-}
-
-void get_kern_msg(void)
-{
- int status;
- struct nlmsghdr *h;
- struct sockaddr_nl nladdr;
- struct iovec iov;
- char buf[8192];
- struct msghdr msg = {
- (void*)&nladdr, sizeof(nladdr),
- &iov, 1,
- NULL, 0,
- 0
- };
-
- memset(&nladdr, 0, sizeof(nladdr));
-
- iov.iov_base = buf;
- iov.iov_len = sizeof(buf);
-
- status = recvmsg(rth.fd, &msg, MSG_DONTWAIT);
-
- if (status <= 0)
- return;
-
- if (msg.msg_namelen != sizeof(nladdr))
- return;
-
- if (nladdr.nl_pid)
- return;
-
- for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) {
- int len = h->nlmsg_len;
- int l = len - sizeof(*h);
-
- if (l < 0 || len > status)
- return;
-
- if (do_one_request(h) < 0)
- return;
-
- status -= NLMSG_ALIGN(len);
- h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len));
- }
-}
-
-/* Receive gratuitous ARP messages and store them, that's all. */
-void get_arp_pkt(void)
-{
- unsigned char buf[1024];
- struct sockaddr_ll sll;
- socklen_t sll_len = sizeof(sll);
- struct arphdr *a = (struct arphdr*)buf;
- struct dbkey key;
- DBT dbkey, dbdat;
- int n;
-
- n = recvfrom(pset[0].fd, buf, sizeof(buf), MSG_DONTWAIT,
- (struct sockaddr*)&sll, &sll_len);
- if (n < 0) {
- if (errno != EINTR && errno != EAGAIN)
- syslog(LOG_ERR, "recvfrom: %m");
- return;
- }
-
- if (ifnum && !handle_if(sll.sll_ifindex))
- return;
-
- /* Sanity checks */
-
- if (n < sizeof(*a) ||
- (a->ar_op != htons(ARPOP_REQUEST) &&
- a->ar_op != htons(ARPOP_REPLY)) ||
- a->ar_pln != 4 ||
- a->ar_pro != htons(ETH_P_IP) ||
- a->ar_hln != sll.sll_halen ||
- sizeof(*a) + 2*4 + 2*a->ar_hln > n)
- return;
-
- key.iface = sll.sll_ifindex;
- memcpy(&key.addr, (char*)(a+1) + a->ar_hln, 4);
-
- /* DAD message, ignore. */
- if (key.addr == 0)
- return;
-
- dbkey.data = &key;
- dbkey.size = sizeof(key);
-
- if (dbase->get(dbase, &dbkey, &dbdat, 0) == 0 && !IS_NEG(dbdat.data)) {
- if (memcmp(dbdat.data, a+1, dbdat.size) == 0)
- return;
- stats.arp_change++;
- } else {
- stats.arp_new++;
- }
-
- dbdat.data = a+1;
- dbdat.size = a->ar_hln;
- dbase->put(dbase, &dbkey, &dbdat, 0);
-}
-
-void catch_signal(int sig, void (*handler)(int))
-{
- struct sigaction sa;
-
- memset(&sa, 0, sizeof(sa));
- sa.sa_handler = handler;
-#ifdef SA_INTERRUPT
- sa.sa_flags = SA_INTERRUPT;
-#endif
- sigaction(sig, &sa, NULL);
-}
-
-#include <setjmp.h>
-sigjmp_buf env;
-volatile int in_poll;
-
-void sig_exit(int signo)
-{
- do_exit = 1;
- if (in_poll)
- siglongjmp(env, 1);
-}
-
-void sig_sync(int signo)
-{
- do_sync = 1;
- if (in_poll)
- siglongjmp(env, 1);
-}
-
-void sig_stats(int signo)
-{
- do_sync = 1;
- do_stats = 1;
- if (in_poll)
- siglongjmp(env, 1);
-}
-
-void send_stats(void)
-{
- syslog(LOG_INFO, "arp_rcv: n%lu c%lu app_rcv: tot %lu hits %lu bad %lu neg %lu sup %lu",
- stats.arp_new, stats.arp_change,
-
- stats.app_recv, stats.app_success,
- stats.app_bad, stats.app_neg, stats.app_suppressed
- );
- syslog(LOG_INFO, "kern: n%lu c%lu neg %lu arp_send: %lu rlim %lu",
- stats.kern_new, stats.kern_change, stats.kern_neg,
-
- stats.probes_sent, stats.probes_suppressed
- );
- do_stats = 0;
-}
-
-
-int main(int argc, char **argv)
-{
- int opt;
- int do_list = 0;
- char *do_load = NULL;
-
- while ((opt = getopt(argc, argv, "h?b:lf:a:n:kR:B:")) != EOF) {
- switch (opt) {
- case 'b':
- dbname = optarg;
- break;
- case 'f':
- if (do_load) {
- fprintf(stderr, "Duplicate option -f\n");
- usage();
- }
- do_load = optarg;
- break;
- case 'l':
- do_list = 1;
- break;
- case 'a':
- active_probing = atoi(optarg);
- break;
- case 'n':
- negative_timeout = atoi(optarg);
- break;
- case 'k':
- no_kernel_broadcasts = 1;
- break;
- case 'R':
- if ((broadcast_rate = atoi(optarg)) <= 0 ||
- (broadcast_rate = 1000/broadcast_rate) <= 0) {
- fprintf(stderr, "Invalid ARP rate\n");
- exit(-1);
- }
- break;
- case 'B':
- if ((broadcast_burst = atoi(optarg)) <= 0 ||
- (broadcast_burst = 1000*broadcast_burst) <= 0) {
- fprintf(stderr, "Invalid ARP burst\n");
- exit(-1);
- }
- break;
- case 'h':
- case '?':
- default:
- usage();
- }
- }
- argc -= optind;
- argv += optind;
-
- if (argc > 0) {
- ifnum = argc;
- ifnames = argv;
- ifvec = malloc(argc*sizeof(int));
- if (!ifvec) {
- perror("malloc");
- exit(-1);
- }
- }
-
- if ((udp_sock = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
- perror("socket");
- exit(-1);
- }
-
- if (ifnum) {
- int i;
- struct ifreq ifr;
- memset(&ifr, 0, sizeof(ifr));
- for (i=0; i<ifnum; i++) {
- strncpy(ifr.ifr_name, ifnames[i], IFNAMSIZ);
- if (ioctl(udp_sock, SIOCGIFINDEX, &ifr)) {
- perror("ioctl(SIOCGIFINDEX)");
- exit(-1);;
- }
- ifvec[i] = ifr.ifr_ifindex;
- }
- }
-
- dbase = dbopen(dbname, O_CREAT|O_RDWR, 0644, DB_HASH, NULL);
- if (dbase == NULL) {
- perror("db_open");
- exit(-1);
- }
-
- if (do_load) {
- char buf[128];
- FILE *fp;
- struct dbkey k;
- DBT dbkey, dbdat;
-
- dbkey.data = &k;
- dbkey.size = sizeof(k);
-
- if (strcmp(do_load, "-") == 0 || strcmp(do_load, "--") == 0) {
- fp = stdin;
- } else if ((fp = fopen(do_load, "r")) == NULL) {
- perror("fopen");
- goto do_abort;
- }
-
- buf[sizeof(buf)-1] = 0;
- while (fgets(buf, sizeof(buf)-1, fp)) {
- __u8 b1[6];
- char ipbuf[128];
- char macbuf[128];
-
- if (buf[0] == '#')
- continue;
-
- if (sscanf(buf, "%u%s%s", &k.iface, ipbuf, macbuf) != 3) {
- fprintf(stderr, "Wrong format of input file \"%s\"\n", do_load);
- goto do_abort;
- }
- if (strncmp(macbuf, "FAILED:", 7) == 0)
- continue;
- if (!inet_aton(ipbuf, (struct in_addr*)&k.addr)) {
- fprintf(stderr, "Invalid IP address: \"%s\"\n", ipbuf);
- goto do_abort;
- }
-
- dbdat.data = hexstring_a2n(macbuf, b1, 6);
- if (dbdat.data == NULL)
- goto do_abort;
- dbdat.size = 6;
-
- if (dbase->put(dbase, &dbkey, &dbdat, 0)) {
- perror("hash->put");
- goto do_abort;
- }
- }
- dbase->sync(dbase, 0);
- if (fp != stdin)
- fclose(fp);
- }
-
- if (do_list) {
- DBT dbkey, dbdat;
- printf("%-8s %-15s %s\n", "#Ifindex", "IP", "MAC");
- while (dbase->seq(dbase, &dbkey, &dbdat, R_NEXT) == 0) {
- struct dbkey *key = dbkey.data;
- if (handle_if(key->iface)) {
- if (!IS_NEG(dbdat.data)) {
- char b1[18];
- printf("%-8d %-15s %s\n",
- key->iface,
- inet_ntoa(*(struct in_addr*)&key->addr),
- hexstring_n2a(dbdat.data, 6, b1, 18));
- } else {
- printf("%-8d %-15s FAILED: %dsec ago\n",
- key->iface,
- inet_ntoa(*(struct in_addr*)&key->addr),
- NEG_AGE(dbdat.data));
- }
- }
- }
- }
-
- if (do_load || do_list)
- goto out;
-
- pset[0].fd = socket(PF_PACKET, SOCK_DGRAM, 0);
- if (pset[0].fd < 0) {
- perror("socket");
- exit(-1);
- }
-
- if (1) {
- struct sockaddr_ll sll;
- memset(&sll, 0, sizeof(sll));
- sll.sll_family = AF_PACKET;
- sll.sll_protocol = htons(ETH_P_ARP);
- sll.sll_ifindex = (ifnum == 1 ? ifvec[0] : 0);
- if (bind(pset[0].fd, (struct sockaddr*)&sll, sizeof(sll)) < 0) {
- perror("bind");
- goto do_abort;
- }
- }
-
- if (rtnl_open(&rth, RTMGRP_NEIGH) < 0) {
- perror("rtnl_open");
- goto do_abort;
- }
- pset[1].fd = rth.fd;
-
- load_initial_table();
-
- if (1) {
- int fd;
- pid_t pid = fork();
-
- if (pid > 0)
- _exit(0);
- if (pid < 0) {
- perror("arpd: fork");
- goto do_abort;
- }
-
- chdir("/");
- fd = open("/dev/null", O_RDWR);
- if (fd >= 0) {
- dup2(fd, 0);
- dup2(fd, 1);
- dup2(fd, 2);
- if (fd > 2)
- close(fd);
- }
- setsid();
- }
-
- openlog("arpd", LOG_PID | LOG_CONS, LOG_DAEMON);
- catch_signal(SIGINT, sig_exit);
- catch_signal(SIGTERM, sig_exit);
- catch_signal(SIGHUP, sig_sync);
- catch_signal(SIGUSR1, sig_stats);
-
-#define EVENTS (POLLIN|POLLPRI|POLLERR|POLLHUP)
- pset[0].events = EVENTS;
- pset[0].revents = 0;
- pset[1].events = EVENTS;
- pset[1].revents = 0;
-
- sigsetjmp(env, 1);
-
- for (;;) {
- in_poll = 1;
-
- if (do_exit)
- break;
- if (do_sync) {
- in_poll = 0;
- dbase->sync(dbase, 0);
- do_sync = 0;
- in_poll = 1;
- }
- if (do_stats)
- send_stats();
- if (poll(pset, 2, 30000) > 0) {
- in_poll = 0;
- if (pset[0].revents&EVENTS)
- get_arp_pkt();
- if (pset[1].revents&EVENTS)
- get_kern_msg();
- } else {
- do_sync = 1;
- }
- }
-
- undo_sysctl_adjustments();
-out:
- dbase->close(dbase);
- exit(0);
-
-do_abort:
- dbase->close(dbase);
- exit(-1);
-}
git://git.onelab.eu / iproute2.git / blobdiff