| /* |
| * ip.c "ip" utility frontend. |
| * |
| * 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 <fcntl.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| #include <string.h> |
| #include <errno.h> |
| |
| #include "version.h" |
| #include "utils.h" |
| #include "ip_common.h" |
| #include "namespace.h" |
| #include "color.h" |
| #include "rt_names.h" |
| #include "bpf_util.h" |
| |
| #ifndef LIBDIR |
| #define LIBDIR "/usr/lib" |
| #endif |
| |
| int preferred_family = AF_UNSPEC; |
| int human_readable; |
| int use_iec; |
| int show_stats; |
| int show_details; |
| int oneline; |
| int brief; |
| int json; |
| int timestamp; |
| int force; |
| int max_flush_loops = 10; |
| int batch_mode; |
| bool do_all; |
| |
| struct rtnl_handle rth = { .fd = -1 }; |
| |
| const char *get_ip_lib_dir(void) |
| { |
| const char *lib_dir; |
| |
| lib_dir = getenv("IP_LIB_DIR"); |
| if (!lib_dir) |
| lib_dir = LIBDIR "/ip"; |
| |
| return lib_dir; |
| } |
| |
| static void usage(void) __attribute__((noreturn)); |
| |
| static void usage(void) |
| { |
| fprintf(stderr, |
| "Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }\n" |
| " ip [ -force ] -batch filename\n" |
| "where OBJECT := { address | addrlabel | fou | help | ila | ioam | l2tp | link |\n" |
| " macsec | maddress | monitor | mptcp | mroute | mrule |\n" |
| " neighbor | neighbour | netconf | netns | nexthop | ntable |\n" |
| " ntbl | route | rule | sr | tap | tcpmetrics |\n" |
| " token | tunnel | tuntap | vrf | xfrm }\n" |
| " OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |\n" |
| " -h[uman-readable] | -iec | -j[son] | -p[retty] |\n" |
| " -f[amily] { inet | inet6 | mpls | bridge | link } |\n" |
| " -4 | -6 | -M | -B | -0 |\n" |
| " -l[oops] { maximum-addr-flush-attempts } | -br[ief] |\n" |
| " -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |\n" |
| " -rc[vbuf] [size] | -n[etns] name | -N[umeric] | -a[ll] |\n" |
| " -c[olor]}\n"); |
| exit(-1); |
| } |
| |
| static int do_help(int argc, char **argv) |
| { |
| usage(); |
| return 0; |
| } |
| |
| static const struct cmd { |
| const char *cmd; |
| int (*func)(int argc, char **argv); |
| } cmds[] = { |
| { "address", do_ipaddr }, |
| { "addrlabel", do_ipaddrlabel }, |
| { "maddress", do_multiaddr }, |
| { "route", do_iproute }, |
| { "rule", do_iprule }, |
| { "neighbor", do_ipneigh }, |
| { "neighbour", do_ipneigh }, |
| { "ntable", do_ipntable }, |
| { "ntbl", do_ipntable }, |
| { "link", do_iplink }, |
| { "l2tp", do_ipl2tp }, |
| { "fou", do_ipfou }, |
| { "ila", do_ipila }, |
| { "macsec", do_ipmacsec }, |
| { "tunnel", do_iptunnel }, |
| { "tunl", do_iptunnel }, |
| { "tuntap", do_iptuntap }, |
| { "tap", do_iptuntap }, |
| { "token", do_iptoken }, |
| { "tcpmetrics", do_tcp_metrics }, |
| { "tcp_metrics", do_tcp_metrics }, |
| { "monitor", do_ipmonitor }, |
| { "xfrm", do_xfrm }, |
| { "mroute", do_multiroute }, |
| { "mrule", do_multirule }, |
| { "netns", do_netns }, |
| { "netconf", do_ipnetconf }, |
| { "vrf", do_ipvrf}, |
| { "sr", do_seg6 }, |
| { "nexthop", do_ipnh }, |
| { "mptcp", do_mptcp }, |
| { "ioam", do_ioam6 }, |
| { "help", do_help }, |
| { 0 } |
| }; |
| |
| static int do_cmd(const char *argv0, int argc, char **argv, bool final) |
| { |
| const struct cmd *c; |
| |
| for (c = cmds; c->cmd; ++c) { |
| if (matches(argv0, c->cmd) == 0) |
| return -(c->func(argc-1, argv+1)); |
| } |
| |
| if (final) |
| fprintf(stderr, "Object \"%s\" is unknown, try \"ip help\".\n", argv0); |
| return EXIT_FAILURE; |
| } |
| |
| static int ip_batch_cmd(int argc, char *argv[], void *data) |
| { |
| const int *orig_family = data; |
| |
| preferred_family = *orig_family; |
| return do_cmd(argv[0], argc, argv, true); |
| } |
| |
| static int batch(const char *name) |
| { |
| int orig_family = preferred_family; |
| int ret; |
| |
| if (rtnl_open(&rth, 0) < 0) { |
| fprintf(stderr, "Cannot open rtnetlink\n"); |
| return EXIT_FAILURE; |
| } |
| |
| batch_mode = 1; |
| ret = do_batch(name, force, ip_batch_cmd, &orig_family); |
| |
| rtnl_close(&rth); |
| return ret; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| const char *libbpf_version; |
| char *batch_file = NULL; |
| char *basename; |
| int color = 0; |
| |
| /* to run vrf exec without root, capabilities might be set, drop them |
| * if not needed as the first thing. |
| * execv will drop them for the child command. |
| * vrf exec requires: |
| * - cap_dac_override to create the cgroup subdir in /sys |
| * - cap_sys_admin to load the BPF program |
| * - cap_net_admin to set the socket into the cgroup |
| */ |
| if (argc < 3 || strcmp(argv[1], "vrf") != 0 || |
| strcmp(argv[2], "exec") != 0) |
| drop_cap(); |
| |
| basename = strrchr(argv[0], '/'); |
| if (basename == NULL) |
| basename = argv[0]; |
| else |
| basename++; |
| |
| while (argc > 1) { |
| char *opt = argv[1]; |
| |
| if (strcmp(opt, "--") == 0) { |
| argc--; argv++; |
| break; |
| } |
| if (opt[0] != '-') |
| break; |
| if (opt[1] == '-') |
| opt++; |
| if (matches(opt, "-loops") == 0) { |
| argc--; |
| argv++; |
| if (argc <= 1) |
| usage(); |
| max_flush_loops = atoi(argv[1]); |
| } else if (matches(opt, "-family") == 0) { |
| argc--; |
| argv++; |
| if (argc <= 1) |
| usage(); |
| if (strcmp(argv[1], "help") == 0) |
| usage(); |
| else |
| preferred_family = read_family(argv[1]); |
| if (preferred_family == AF_UNSPEC) |
| invarg("invalid protocol family", argv[1]); |
| } else if (strcmp(opt, "-4") == 0) { |
| preferred_family = AF_INET; |
| } else if (strcmp(opt, "-6") == 0) { |
| preferred_family = AF_INET6; |
| } else if (strcmp(opt, "-0") == 0) { |
| preferred_family = AF_PACKET; |
| } else if (strcmp(opt, "-M") == 0) { |
| preferred_family = AF_MPLS; |
| } else if (strcmp(opt, "-B") == 0) { |
| preferred_family = AF_BRIDGE; |
| } else if (matches(opt, "-human") == 0 || |
| matches(opt, "-human-readable") == 0) { |
| ++human_readable; |
| } else if (matches(opt, "-iec") == 0) { |
| ++use_iec; |
| } else if (matches(opt, "-stats") == 0 || |
| matches(opt, "-statistics") == 0) { |
| ++show_stats; |
| } else if (matches(opt, "-details") == 0) { |
| ++show_details; |
| } else if (matches(opt, "-resolve") == 0) { |
| ++resolve_hosts; |
| } else if (matches(opt, "-oneline") == 0) { |
| ++oneline; |
| } else if (matches(opt, "-timestamp") == 0) { |
| ++timestamp; |
| } else if (matches(opt, "-tshort") == 0) { |
| ++timestamp; |
| ++timestamp_short; |
| } else if (matches(opt, "-Version") == 0) { |
| printf("ip utility, iproute2-%s", version); |
| libbpf_version = get_libbpf_version(); |
| if (libbpf_version) |
| printf(", libbpf %s", libbpf_version); |
| printf("\n"); |
| exit(0); |
| } else if (matches(opt, "-force") == 0) { |
| ++force; |
| } else if (matches(opt, "-batch") == 0) { |
| argc--; |
| argv++; |
| if (argc <= 1) |
| usage(); |
| batch_file = argv[1]; |
| } else if (matches(opt, "-brief") == 0) { |
| ++brief; |
| } else if (matches(opt, "-json") == 0) { |
| ++json; |
| } else if (matches(opt, "-pretty") == 0) { |
| ++pretty; |
| } else if (matches(opt, "-rcvbuf") == 0) { |
| unsigned int size; |
| |
| argc--; |
| argv++; |
| if (argc <= 1) |
| usage(); |
| if (get_unsigned(&size, argv[1], 0)) { |
| fprintf(stderr, "Invalid rcvbuf size '%s'\n", |
| argv[1]); |
| exit(-1); |
| } |
| rcvbuf = size; |
| } else if (matches_color(opt, &color)) { |
| } else if (matches(opt, "-help") == 0) { |
| usage(); |
| } else if (matches(opt, "-netns") == 0) { |
| NEXT_ARG(); |
| if (netns_switch(argv[1])) |
| exit(-1); |
| } else if (matches(opt, "-Numeric") == 0) { |
| ++numeric; |
| } else if (matches(opt, "-all") == 0) { |
| do_all = true; |
| } else { |
| fprintf(stderr, |
| "Option \"%s\" is unknown, try \"ip -help\".\n", |
| opt); |
| exit(-1); |
| } |
| argc--; argv++; |
| } |
| |
| _SL_ = oneline ? "\\" : "\n"; |
| |
| check_enable_color(color, json); |
| |
| if (batch_file) |
| return batch(batch_file); |
| |
| if (rtnl_open(&rth, 0) < 0) |
| exit(1); |
| |
| rtnl_set_strict_dump(&rth); |
| |
| if (strlen(basename) > 2) { |
| int ret = do_cmd(basename+2, argc, argv, false); |
| if (ret != EXIT_FAILURE) |
| return ret; |
| } |
| |
| if (argc > 1) |
| return do_cmd(argv[1], argc-1, argv+1, true); |
| |
| rtnl_close(&rth); |
| usage(); |
| } |