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aosp12/external/iproute2/ip/ipmonitor.c

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/*
* ipmonitor.c "ip monitor".
*
* 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 <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 <time.h>
#include "utils.h"
#include "ip_common.h"
static void usage(void) __attribute__((noreturn));
int prefix_banner;
int listen_all_nsid;
static void usage(void)
{
fprintf(stderr, "Usage: ip monitor [ all | LISTofOBJECTS ] [ FILE ] [ label ] [all-nsid] [dev DEVICE]\n");
fprintf(stderr, "LISTofOBJECTS := link | address | route | mroute | prefix |\n");
fprintf(stderr, " neigh | netconf | rule | nsid\n");
fprintf(stderr, "FILE := file FILENAME\n");
exit(-1);
}
static void print_headers(FILE *fp, char *label, struct rtnl_ctrl_data *ctrl)
{
if (timestamp)
print_timestamp(fp);
if (listen_all_nsid) {
if (ctrl == NULL || ctrl->nsid < 0)
fprintf(fp, "[nsid current]");
else
fprintf(fp, "[nsid %d]", ctrl->nsid);
}
if (prefix_banner)
fprintf(fp, "%s", label);
}
static int accept_msg(const struct sockaddr_nl *who,
struct rtnl_ctrl_data *ctrl,
struct nlmsghdr *n, void *arg)
{
FILE *fp = (FILE *)arg;
if (n->nlmsg_type == RTM_NEWROUTE || n->nlmsg_type == RTM_DELROUTE) {
struct rtmsg *r = NLMSG_DATA(n);
int len = n->nlmsg_len - NLMSG_LENGTH(sizeof(*r));
if (len < 0) {
fprintf(stderr, "BUG: wrong nlmsg len %d\n", len);
return -1;
}
if (r->rtm_flags & RTM_F_CLONED)
return 0;
if (r->rtm_family == RTNL_FAMILY_IPMR ||
r->rtm_family == RTNL_FAMILY_IP6MR) {
print_headers(fp, "[MROUTE]", ctrl);
print_mroute(who, n, arg);
return 0;
} else {
print_headers(fp, "[ROUTE]", ctrl);
print_route(who, n, arg);
return 0;
}
}
if (n->nlmsg_type == RTM_NEWLINK || n->nlmsg_type == RTM_DELLINK) {
ll_remember_index(who, n, NULL);
print_headers(fp, "[LINK]", ctrl);
print_linkinfo(who, n, arg);
return 0;
}
if (n->nlmsg_type == RTM_NEWADDR || n->nlmsg_type == RTM_DELADDR) {
print_headers(fp, "[ADDR]", ctrl);
print_addrinfo(who, n, arg);
return 0;
}
if (n->nlmsg_type == RTM_NEWADDRLABEL || n->nlmsg_type == RTM_DELADDRLABEL) {
print_headers(fp, "[ADDRLABEL]", ctrl);
print_addrlabel(who, n, arg);
return 0;
}
if (n->nlmsg_type == RTM_NEWNEIGH || n->nlmsg_type == RTM_DELNEIGH ||
n->nlmsg_type == RTM_GETNEIGH) {
if (preferred_family) {
struct ndmsg *r = NLMSG_DATA(n);
if (r->ndm_family != preferred_family)
return 0;
}
print_headers(fp, "[NEIGH]", ctrl);
print_neigh(who, n, arg);
return 0;
}
if (n->nlmsg_type == RTM_NEWPREFIX) {
print_headers(fp, "[PREFIX]", ctrl);
print_prefix(who, n, arg);
return 0;
}
if (n->nlmsg_type == RTM_NEWRULE || n->nlmsg_type == RTM_DELRULE) {
print_headers(fp, "[RULE]", ctrl);
print_rule(who, n, arg);
return 0;
}
if (n->nlmsg_type == RTM_NEWNETCONF) {
print_headers(fp, "[NETCONF]", ctrl);
print_netconf(who, ctrl, n, arg);
return 0;
}
if (n->nlmsg_type == NLMSG_TSTAMP) {
print_nlmsg_timestamp(fp, n);
return 0;
}
if (n->nlmsg_type == RTM_NEWNSID || n->nlmsg_type == RTM_DELNSID) {
print_headers(fp, "[NSID]", ctrl);
print_nsid(who, n, arg);
return 0;
}
if (n->nlmsg_type != NLMSG_ERROR && n->nlmsg_type != NLMSG_NOOP &&
n->nlmsg_type != NLMSG_DONE) {
fprintf(fp, "Unknown message: type=0x%08x(%d) flags=0x%08x(%d)len=0x%08x(%d)\n",
n->nlmsg_type, n->nlmsg_type,
n->nlmsg_flags, n->nlmsg_flags, n->nlmsg_len,
n->nlmsg_len);
}
return 0;
}
int do_ipmonitor(int argc, char **argv)
{
char *file = NULL;
unsigned int groups = 0;
int llink = 0;
int laddr = 0;
int lroute = 0;
int lmroute = 0;
int lprefix = 0;
int lneigh = 0;
int lnetconf = 0;
int lrule = 0;
int lnsid = 0;
int ifindex = 0;
groups |= nl_mgrp(RTNLGRP_LINK);
groups |= nl_mgrp(RTNLGRP_IPV4_IFADDR);
groups |= nl_mgrp(RTNLGRP_IPV6_IFADDR);
groups |= nl_mgrp(RTNLGRP_IPV4_ROUTE);
groups |= nl_mgrp(RTNLGRP_IPV6_ROUTE);
groups |= nl_mgrp(RTNLGRP_MPLS_ROUTE);
groups |= nl_mgrp(RTNLGRP_IPV4_MROUTE);
groups |= nl_mgrp(RTNLGRP_IPV6_MROUTE);
groups |= nl_mgrp(RTNLGRP_IPV6_PREFIX);
groups |= nl_mgrp(RTNLGRP_NEIGH);
groups |= nl_mgrp(RTNLGRP_IPV4_NETCONF);
groups |= nl_mgrp(RTNLGRP_IPV6_NETCONF);
groups |= nl_mgrp(RTNLGRP_IPV4_RULE);
groups |= nl_mgrp(RTNLGRP_IPV6_RULE);
groups |= nl_mgrp(RTNLGRP_NSID);
groups |= nl_mgrp(RTNLGRP_MPLS_NETCONF);
rtnl_close(&rth);
while (argc > 0) {
if (matches(*argv, "file") == 0) {
NEXT_ARG();
file = *argv;
} else if (matches(*argv, "label") == 0) {
prefix_banner = 1;
} else if (matches(*argv, "link") == 0) {
llink = 1;
groups = 0;
} else if (matches(*argv, "address") == 0) {
laddr = 1;
groups = 0;
} else if (matches(*argv, "route") == 0) {
lroute = 1;
groups = 0;
} else if (matches(*argv, "mroute") == 0) {
lmroute = 1;
groups = 0;
} else if (matches(*argv, "prefix") == 0) {
lprefix = 1;
groups = 0;
} else if (matches(*argv, "neigh") == 0) {
lneigh = 1;
groups = 0;
} else if (matches(*argv, "netconf") == 0) {
lnetconf = 1;
groups = 0;
} else if (matches(*argv, "rule") == 0) {
lrule = 1;
groups = 0;
} else if (matches(*argv, "nsid") == 0) {
lnsid = 1;
groups = 0;
} else if (strcmp(*argv, "all") == 0) {
prefix_banner = 1;
} else if (matches(*argv, "all-nsid") == 0) {
listen_all_nsid = 1;
} else if (matches(*argv, "help") == 0) {
usage();
} else if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();
ifindex = ll_name_to_index(*argv);
if (!ifindex)
invarg("Device does not exist\n", *argv);
} else {
fprintf(stderr, "Argument \"%s\" is unknown, try \"ip monitor help\".\n", *argv);
exit(-1);
}
argc--; argv++;
}
ipaddr_reset_filter(1, ifindex);
iproute_reset_filter(ifindex);
ipmroute_reset_filter(ifindex);
ipneigh_reset_filter(ifindex);
ipnetconf_reset_filter(ifindex);
if (llink)
groups |= nl_mgrp(RTNLGRP_LINK);
if (laddr) {
if (!preferred_family || preferred_family == AF_INET)
groups |= nl_mgrp(RTNLGRP_IPV4_IFADDR);
if (!preferred_family || preferred_family == AF_INET6)
groups |= nl_mgrp(RTNLGRP_IPV6_IFADDR);
}
if (lroute) {
if (!preferred_family || preferred_family == AF_INET)
groups |= nl_mgrp(RTNLGRP_IPV4_ROUTE);
if (!preferred_family || preferred_family == AF_INET6)
groups |= nl_mgrp(RTNLGRP_IPV6_ROUTE);
if (!preferred_family || preferred_family == AF_MPLS)
groups |= nl_mgrp(RTNLGRP_MPLS_ROUTE);
}
if (lmroute) {
if (!preferred_family || preferred_family == AF_INET)
groups |= nl_mgrp(RTNLGRP_IPV4_MROUTE);
if (!preferred_family || preferred_family == AF_INET6)
groups |= nl_mgrp(RTNLGRP_IPV6_MROUTE);
}
if (lprefix) {
if (!preferred_family || preferred_family == AF_INET6)
groups |= nl_mgrp(RTNLGRP_IPV6_PREFIX);
}
if (lneigh) {
groups |= nl_mgrp(RTNLGRP_NEIGH);
}
if (lnetconf) {
if (!preferred_family || preferred_family == AF_INET)
groups |= nl_mgrp(RTNLGRP_IPV4_NETCONF);
if (!preferred_family || preferred_family == AF_INET6)
groups |= nl_mgrp(RTNLGRP_IPV6_NETCONF);
if (!preferred_family || preferred_family == AF_MPLS)
groups |= nl_mgrp(RTNLGRP_MPLS_NETCONF);
}
if (lrule) {
if (!preferred_family || preferred_family == AF_INET)
groups |= nl_mgrp(RTNLGRP_IPV4_RULE);
if (!preferred_family || preferred_family == AF_INET6)
groups |= nl_mgrp(RTNLGRP_IPV6_RULE);
}
if (lnsid) {
groups |= nl_mgrp(RTNLGRP_NSID);
}
if (file) {
FILE *fp;
int err;
fp = fopen(file, "r");
if (fp == NULL) {
perror("Cannot fopen");
exit(-1);
}
err = rtnl_from_file(fp, accept_msg, stdout);
fclose(fp);
return err;
}
if (rtnl_open(&rth, groups) < 0)
exit(1);
if (listen_all_nsid && rtnl_listen_all_nsid(&rth) < 0)
exit(1);
ll_init_map(&rth);
netns_nsid_socket_init();
netns_map_init();
if (rtnl_listen(&rth, accept_msg, stdout) < 0)
exit(2);
return 0;
}
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