diff options
Diffstat (limited to 'ip/ip.c')
| -rw-r--r-- | ip/ip.c | 327 |
1 files changed, 327 insertions, 0 deletions
@@ -0,0 +1,327 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * ip.c "ip" utility frontend. + * + * 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 echo_request; +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 | stats | 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 } | -echo | -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 }, + { "stats", do_ipstats }, + { 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 = CONF_COLOR; + + /* 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_bpf 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 if (strcmp(opt, "-echo") == 0) { + ++echo_request; + } 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(); +} |