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/*
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* ipmonitor.c "ip monitor".
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include <time.h>
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#include "utils.h"
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#include "ip_common.h"
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static void usage(void) __attribute__((noreturn));
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static int prefix_banner;
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int listen_all_nsid;
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static void usage(void)
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{
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fprintf(stderr,
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"Usage: ip monitor [ all | LISTofOBJECTS ] [ FILE ] [ label ] [all-nsid] [dev DEVICE]\n"
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"LISTofOBJECTS := link | address | route | mroute | prefix |\n"
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" neigh | netconf | rule | nsid\n"
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"FILE := file FILENAME\n");
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exit(-1);
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}
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static void print_headers(FILE *fp, char *label, struct rtnl_ctrl_data *ctrl)
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{
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if (timestamp)
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print_timestamp(fp);
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if (listen_all_nsid) {
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if (ctrl == NULL || ctrl->nsid < 0)
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fprintf(fp, "[nsid current]");
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else
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fprintf(fp, "[nsid %d]", ctrl->nsid);
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}
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if (prefix_banner)
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fprintf(fp, "%s", label);
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}
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static int accept_msg(struct rtnl_ctrl_data *ctrl,
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struct nlmsghdr *n, void *arg)
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{
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FILE *fp = (FILE *)arg;
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switch (n->nlmsg_type) {
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case RTM_NEWROUTE:
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case RTM_DELROUTE: {
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struct rtmsg *r = NLMSG_DATA(n);
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int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
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if (len < 0) {
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fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
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return -1;
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}
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if (r->rtm_flags & RTM_F_CLONED)
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return 0;
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if (r->rtm_family == RTNL_FAMILY_IPMR ||
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r->rtm_family == RTNL_FAMILY_IP6MR) {
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print_headers(fp, "[MROUTE]", ctrl);
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print_mroute(n, arg);
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return 0;
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} else {
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print_headers(fp, "[ROUTE]", ctrl);
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print_route(n, arg);
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return 0;
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}
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}
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case RTM_NEWNEXTHOP:
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case RTM_DELNEXTHOP:
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print_headers(fp, "[NEXTHOP]", ctrl);
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print_nexthop(n, arg);
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return 0;
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case RTM_NEWLINK:
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case RTM_DELLINK:
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ll_remember_index(n, NULL);
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print_headers(fp, "[LINK]", ctrl);
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print_linkinfo(n, arg);
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return 0;
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case RTM_NEWADDR:
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case RTM_DELADDR:
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print_headers(fp, "[ADDR]", ctrl);
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print_addrinfo(n, arg);
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return 0;
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case RTM_NEWADDRLABEL:
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case RTM_DELADDRLABEL:
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print_headers(fp, "[ADDRLABEL]", ctrl);
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print_addrlabel(n, arg);
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return 0;
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case RTM_NEWNEIGH:
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case RTM_DELNEIGH:
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case RTM_GETNEIGH:
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if (preferred_family) {
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struct ndmsg *r = NLMSG_DATA(n);
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if (r->ndm_family != preferred_family)
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return 0;
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}
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print_headers(fp, "[NEIGH]", ctrl);
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print_neigh(n, arg);
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return 0;
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case RTM_NEWPREFIX:
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print_headers(fp, "[PREFIX]", ctrl);
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print_prefix(n, arg);
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return 0;
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case RTM_NEWRULE:
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case RTM_DELRULE:
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print_headers(fp, "[RULE]", ctrl);
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print_rule(n, arg);
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return 0;
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case NLMSG_TSTAMP:
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print_nlmsg_timestamp(fp, n);
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return 0;
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case RTM_NEWNETCONF:
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case RTM_DELNETCONF:
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print_headers(fp, "[NETCONF]", ctrl);
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print_netconf(ctrl, n, arg);
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return 0;
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case RTM_DELNSID:
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case RTM_NEWNSID:
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print_headers(fp, "[NSID]", ctrl);
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print_nsid(n, arg);
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return 0;
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case NLMSG_ERROR:
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case NLMSG_NOOP:
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case NLMSG_DONE:
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break; /* ignore */
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default:
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fprintf(stderr,
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"Unknown message: type=0x%08x(%d) flags=0x%08x(%d) len=0x%08x(%d)\n",
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n->nlmsg_type, n->nlmsg_type,
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n->nlmsg_flags, n->nlmsg_flags, n->nlmsg_len,
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n->nlmsg_len);
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}
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return 0;
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}
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int do_ipmonitor(int argc, char **argv)
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{
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int lnexthop = 0, nh_set = 1;
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char *file = NULL;
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unsigned int groups = 0;
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int llink = 0;
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int laddr = 0;
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int lroute = 0;
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int lmroute = 0;
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int lprefix = 0;
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int lneigh = 0;
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int lnetconf = 0;
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int lrule = 0;
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int lnsid = 0;
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int ifindex = 0;
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groups |= nl_mgrp(RTNLGRP_LINK);
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groups |= nl_mgrp(RTNLGRP_IPV4_IFADDR);
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groups |= nl_mgrp(RTNLGRP_IPV6_IFADDR);
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groups |= nl_mgrp(RTNLGRP_IPV4_ROUTE);
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groups |= nl_mgrp(RTNLGRP_IPV6_ROUTE);
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groups |= nl_mgrp(RTNLGRP_MPLS_ROUTE);
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groups |= nl_mgrp(RTNLGRP_IPV4_MROUTE);
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groups |= nl_mgrp(RTNLGRP_IPV6_MROUTE);
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groups |= nl_mgrp(RTNLGRP_IPV6_PREFIX);
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groups |= nl_mgrp(RTNLGRP_NEIGH);
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groups |= nl_mgrp(RTNLGRP_IPV4_NETCONF);
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groups |= nl_mgrp(RTNLGRP_IPV6_NETCONF);
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groups |= nl_mgrp(RTNLGRP_IPV4_RULE);
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groups |= nl_mgrp(RTNLGRP_IPV6_RULE);
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groups |= nl_mgrp(RTNLGRP_NSID);
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groups |= nl_mgrp(RTNLGRP_MPLS_NETCONF);
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rtnl_close(&rth);
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while (argc > 0) {
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if (matches(*argv, "file") == 0) {
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NEXT_ARG();
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file = *argv;
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} else if (matches(*argv, "label") == 0) {
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prefix_banner = 1;
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} else if (matches(*argv, "link") == 0) {
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llink = 1;
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groups = 0;
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nh_set = 0;
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} else if (matches(*argv, "address") == 0) {
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laddr = 1;
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groups = 0;
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nh_set = 0;
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} else if (matches(*argv, "route") == 0) {
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lroute = 1;
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groups = 0;
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nh_set = 0;
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} else if (matches(*argv, "mroute") == 0) {
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lmroute = 1;
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groups = 0;
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nh_set = 0;
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} else if (matches(*argv, "prefix") == 0) {
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lprefix = 1;
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groups = 0;
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nh_set = 0;
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} else if (matches(*argv, "neigh") == 0) {
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lneigh = 1;
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groups = 0;
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nh_set = 0;
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} else if (matches(*argv, "netconf") == 0) {
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lnetconf = 1;
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groups = 0;
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nh_set = 0;
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} else if (matches(*argv, "rule") == 0) {
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lrule = 1;
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groups = 0;
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nh_set = 0;
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} else if (matches(*argv, "nsid") == 0) {
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lnsid = 1;
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groups = 0;
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nh_set = 0;
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} else if (matches(*argv, "nexthop") == 0) {
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lnexthop = 1;
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groups = 0;
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} else if (strcmp(*argv, "all") == 0) {
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prefix_banner = 1;
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} else if (matches(*argv, "all-nsid") == 0) {
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listen_all_nsid = 1;
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} else if (matches(*argv, "help") == 0) {
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usage();
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} else if (strcmp(*argv, "dev") == 0) {
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NEXT_ARG();
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ifindex = ll_name_to_index(*argv);
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if (!ifindex)
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invarg("Device does not exist\n", *argv);
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} else {
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fprintf(stderr, "Argument \"%s\" is unknown, try \"ip monitor help\".\n", *argv);
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exit(-1);
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}
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argc--; argv++;
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}
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ipaddr_reset_filter(1, ifindex);
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iproute_reset_filter(ifindex);
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ipmroute_reset_filter(ifindex);
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ipneigh_reset_filter(ifindex);
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ipnetconf_reset_filter(ifindex);
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if (llink)
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groups |= nl_mgrp(RTNLGRP_LINK);
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if (laddr) {
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if (!preferred_family || preferred_family == AF_INET)
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groups |= nl_mgrp(RTNLGRP_IPV4_IFADDR);
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if (!preferred_family || preferred_family == AF_INET6)
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groups |= nl_mgrp(RTNLGRP_IPV6_IFADDR);
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}
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if (lroute) {
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if (!preferred_family || preferred_family == AF_INET)
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groups |= nl_mgrp(RTNLGRP_IPV4_ROUTE);
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if (!preferred_family || preferred_family == AF_INET6)
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groups |= nl_mgrp(RTNLGRP_IPV6_ROUTE);
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if (!preferred_family || preferred_family == AF_MPLS)
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groups |= nl_mgrp(RTNLGRP_MPLS_ROUTE);
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}
|
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if (lmroute) {
|
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if (!preferred_family || preferred_family == AF_INET)
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Packit Service |
3880ab |
groups |= nl_mgrp(RTNLGRP_IPV4_MROUTE);
|
|
Packit Service |
3880ab |
if (!preferred_family || preferred_family == AF_INET6)
|
|
Packit Service |
3880ab |
groups |= nl_mgrp(RTNLGRP_IPV6_MROUTE);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (lprefix) {
|
|
Packit Service |
3880ab |
if (!preferred_family || preferred_family == AF_INET6)
|
|
Packit Service |
3880ab |
groups |= nl_mgrp(RTNLGRP_IPV6_PREFIX);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (lneigh) {
|
|
Packit Service |
3880ab |
groups |= nl_mgrp(RTNLGRP_NEIGH);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (lnetconf) {
|
|
Packit Service |
3880ab |
if (!preferred_family || preferred_family == AF_INET)
|
|
Packit Service |
3880ab |
groups |= nl_mgrp(RTNLGRP_IPV4_NETCONF);
|
|
Packit Service |
3880ab |
if (!preferred_family || preferred_family == AF_INET6)
|
|
Packit Service |
3880ab |
groups |= nl_mgrp(RTNLGRP_IPV6_NETCONF);
|
|
Packit Service |
3880ab |
if (!preferred_family || preferred_family == AF_MPLS)
|
|
Packit Service |
3880ab |
groups |= nl_mgrp(RTNLGRP_MPLS_NETCONF);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (lrule) {
|
|
Packit Service |
3880ab |
if (!preferred_family || preferred_family == AF_INET)
|
|
Packit Service |
3880ab |
groups |= nl_mgrp(RTNLGRP_IPV4_RULE);
|
|
Packit Service |
3880ab |
if (!preferred_family || preferred_family == AF_INET6)
|
|
Packit Service |
3880ab |
groups |= nl_mgrp(RTNLGRP_IPV6_RULE);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (lnsid) {
|
|
Packit Service |
3880ab |
groups |= nl_mgrp(RTNLGRP_NSID);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
if (nh_set)
|
|
Packit Service |
3880ab |
lnexthop = 1;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (file) {
|
|
Packit Service |
3880ab |
FILE *fp;
|
|
Packit Service |
3880ab |
int err;
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
fp = fopen(file, "r");
|
|
Packit Service |
3880ab |
if (fp == NULL) {
|
|
Packit Service |
3880ab |
perror("Cannot fopen");
|
|
Packit Service |
3880ab |
exit(-1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
err = rtnl_from_file(fp, accept_msg, stdout);
|
|
Packit Service |
3880ab |
fclose(fp);
|
|
Packit Service |
3880ab |
return err;
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (rtnl_open(&rth, groups) < 0)
|
|
Packit Service |
3880ab |
exit(1);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (lnexthop && rtnl_add_nl_group(&rth, RTNLGRP_NEXTHOP) < 0) {
|
|
Packit Service |
3880ab |
fprintf(stderr, "Failed to add nexthop group to list\n");
|
|
Packit Service |
3880ab |
exit(1);
|
|
Packit Service |
3880ab |
}
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (listen_all_nsid && rtnl_listen_all_nsid(&rth) < 0)
|
|
Packit Service |
3880ab |
exit(1);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
ll_init_map(&rth);
|
|
Packit Service |
3880ab |
netns_nsid_socket_init();
|
|
Packit Service |
3880ab |
netns_map_init();
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
if (rtnl_listen(&rth, accept_msg, stdout) < 0)
|
|
Packit Service |
3880ab |
exit(2);
|
|
Packit Service |
3880ab |
|
|
Packit Service |
3880ab |
return 0;
|
|
Packit Service |
3880ab |
}
|