/bridge/link.c
C | 476 lines | 403 code | 61 blank | 12 comment | 149 complexity | 7281e40d32b98612bbc3d18b42ad05b7 MD5 | raw file
- #include <stdio.h>
- #include <stdlib.h>
- #include <unistd.h>
- #include <time.h>
- #include <sys/socket.h>
- #include <sys/time.h>
- #include <netinet/in.h>
- #include <linux/if.h>
- #include <linux/if_bridge.h>
- #include <string.h>
- #include <stdbool.h>
- #include "libnetlink.h"
- #include "utils.h"
- #include "br_common.h"
- static unsigned int filter_index;
- static const char *port_states[] = {
- [BR_STATE_DISABLED] = "disabled",
- [BR_STATE_LISTENING] = "listening",
- [BR_STATE_LEARNING] = "learning",
- [BR_STATE_FORWARDING] = "forwarding",
- [BR_STATE_BLOCKING] = "blocking",
- };
- extern char *if_indextoname (unsigned int __ifindex, char *__ifname);
- static void print_link_flags(FILE *fp, unsigned flags)
- {
- fprintf(fp, "<");
- if (flags & IFF_UP && !(flags & IFF_RUNNING))
- fprintf(fp, "NO-CARRIER%s", flags ? "," : "");
- flags &= ~IFF_RUNNING;
- #define _PF(f) if (flags&IFF_##f) { \
- flags &= ~IFF_##f ; \
- fprintf(fp, #f "%s", flags ? "," : ""); }
- _PF(LOOPBACK);
- _PF(BROADCAST);
- _PF(POINTOPOINT);
- _PF(MULTICAST);
- _PF(NOARP);
- _PF(ALLMULTI);
- _PF(PROMISC);
- _PF(MASTER);
- _PF(SLAVE);
- _PF(DEBUG);
- _PF(DYNAMIC);
- _PF(AUTOMEDIA);
- _PF(PORTSEL);
- _PF(NOTRAILERS);
- _PF(UP);
- _PF(LOWER_UP);
- _PF(DORMANT);
- _PF(ECHO);
- #undef _PF
- if (flags)
- fprintf(fp, "%x", flags);
- fprintf(fp, "> ");
- }
- static const char *oper_states[] = {
- "UNKNOWN", "NOTPRESENT", "DOWN", "LOWERLAYERDOWN",
- "TESTING", "DORMANT", "UP"
- };
- static const char *hw_mode[] = {"VEB", "VEPA"};
- static void print_operstate(FILE *f, __u8 state)
- {
- if (state >= sizeof(oper_states)/sizeof(oper_states[0]))
- fprintf(f, "state %#x ", state);
- else
- fprintf(f, "state %s ", oper_states[state]);
- }
- static void print_portstate(FILE *f, __u8 state)
- {
- if (state <= BR_STATE_BLOCKING)
- fprintf(f, "state %s ", port_states[state]);
- else
- fprintf(f, "state (%d) ", state);
- }
- static void print_onoff(FILE *f, char *flag, __u8 val)
- {
- fprintf(f, "%s %s ", flag, val ? "on" : "off");
- }
- static void print_hwmode(FILE *f, __u16 mode)
- {
- if (mode >= sizeof(hw_mode)/sizeof(hw_mode[0]))
- fprintf(f, "hwmode %#hx ", mode);
- else
- fprintf(f, "hwmode %s ", hw_mode[mode]);
- }
- int print_linkinfo(const struct sockaddr_nl *who,
- struct nlmsghdr *n, void *arg)
- {
- FILE *fp = arg;
- int len = n->nlmsg_len;
- struct ifinfomsg *ifi = NLMSG_DATA(n);
- struct rtattr * tb[IFLA_MAX+1];
- char b1[IFNAMSIZ];
- len -= NLMSG_LENGTH(sizeof(*ifi));
- if (len < 0) {
- fprintf(stderr, "Message too short!\n");
- return -1;
- }
- if (!(ifi->ifi_family == AF_BRIDGE || ifi->ifi_family == AF_UNSPEC))
- return 0;
- if (filter_index && filter_index != ifi->ifi_index)
- return 0;
- parse_rtattr_flags(tb, IFLA_MAX, IFLA_RTA(ifi), len, NLA_F_NESTED);
- if (tb[IFLA_IFNAME] == NULL) {
- fprintf(stderr, "BUG: nil ifname\n");
- return -1;
- }
- if (n->nlmsg_type == RTM_DELLINK)
- fprintf(fp, "Deleted ");
- fprintf(fp, "%d: %s ", ifi->ifi_index,
- tb[IFLA_IFNAME] ? rta_getattr_str(tb[IFLA_IFNAME]) : "<nil>");
- if (tb[IFLA_OPERSTATE])
- print_operstate(fp, rta_getattr_u8(tb[IFLA_OPERSTATE]));
- if (tb[IFLA_LINK]) {
- SPRINT_BUF(b1);
- int iflink = rta_getattr_u32(tb[IFLA_LINK]);
- if (iflink == 0)
- fprintf(fp, "@NONE: ");
- else
- fprintf(fp, "@%s: ",
- if_indextoname(iflink, b1));
- } else
- fprintf(fp, ": ");
- print_link_flags(fp, ifi->ifi_flags);
- if (tb[IFLA_MTU])
- fprintf(fp, "mtu %u ", rta_getattr_u32(tb[IFLA_MTU]));
- if (tb[IFLA_MASTER])
- fprintf(fp, "master %s ",
- if_indextoname(rta_getattr_u32(tb[IFLA_MASTER]), b1));
- if (tb[IFLA_PROTINFO]) {
- if (tb[IFLA_PROTINFO]->rta_type & NLA_F_NESTED) {
- struct rtattr *prtb[IFLA_BRPORT_MAX+1];
- parse_rtattr_nested(prtb, IFLA_BRPORT_MAX,
- tb[IFLA_PROTINFO]);
- if (prtb[IFLA_BRPORT_STATE])
- print_portstate(fp,
- rta_getattr_u8(prtb[IFLA_BRPORT_STATE]));
- if (prtb[IFLA_BRPORT_PRIORITY])
- fprintf(fp, "priority %hu ",
- rta_getattr_u16(prtb[IFLA_BRPORT_PRIORITY]));
- if (prtb[IFLA_BRPORT_COST])
- fprintf(fp, "cost %u ",
- rta_getattr_u32(prtb[IFLA_BRPORT_COST]));
- if (show_details) {
- fprintf(fp, "%s ", _SL_);
- if (prtb[IFLA_BRPORT_MODE])
- print_onoff(fp, "hairpin",
- rta_getattr_u8(prtb[IFLA_BRPORT_MODE]));
- if (prtb[IFLA_BRPORT_GUARD])
- print_onoff(fp, "guard",
- rta_getattr_u8(prtb[IFLA_BRPORT_GUARD]));
- if (prtb[IFLA_BRPORT_PROTECT])
- print_onoff(fp, "root_block",
- rta_getattr_u8(prtb[IFLA_BRPORT_PROTECT]));
- if (prtb[IFLA_BRPORT_FAST_LEAVE])
- print_onoff(fp, "fastleave",
- rta_getattr_u8(prtb[IFLA_BRPORT_FAST_LEAVE]));
- if (prtb[IFLA_BRPORT_LEARNING])
- print_onoff(fp, "learning",
- rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING]));
- if (prtb[IFLA_BRPORT_LEARNING_SYNC])
- print_onoff(fp, "learning_sync",
- rta_getattr_u8(prtb[IFLA_BRPORT_LEARNING_SYNC]));
- if (prtb[IFLA_BRPORT_UNICAST_FLOOD])
- print_onoff(fp, "flood",
- rta_getattr_u8(prtb[IFLA_BRPORT_UNICAST_FLOOD]));
- }
- } else
- print_portstate(fp, rta_getattr_u8(tb[IFLA_PROTINFO]));
- }
- if (tb[IFLA_AF_SPEC]) {
- /* This is reported by HW devices that have some bridging
- * capabilities.
- */
- struct rtattr *aftb[IFLA_BRIDGE_MAX+1];
- parse_rtattr_nested(aftb, IFLA_BRIDGE_MAX, tb[IFLA_AF_SPEC]);
- if (aftb[IFLA_BRIDGE_MODE])
- print_hwmode(fp, rta_getattr_u16(aftb[IFLA_BRIDGE_MODE]));
- }
- fprintf(fp, "\n");
- fflush(fp);
- return 0;
- }
- static void usage(void)
- {
- fprintf(stderr, "Usage: bridge link set dev DEV [ cost COST ] [ priority PRIO ] [ state STATE ]\n");
- fprintf(stderr, " [ guard {on | off} ]\n");
- fprintf(stderr, " [ hairpin {on | off} ] \n");
- fprintf(stderr, " [ fastleave {on | off} ]\n");
- fprintf(stderr, " [ root_block {on | off} ]\n");
- fprintf(stderr, " [ learning {on | off} ]\n");
- fprintf(stderr, " [ learning_sync {on | off} ]\n");
- fprintf(stderr, " [ flood {on | off} ]\n");
- fprintf(stderr, " [ hwmode {vepa | veb} ]\n");
- fprintf(stderr, " [ self ] [ master ]\n");
- fprintf(stderr, " bridge link show [dev DEV]\n");
- exit(-1);
- }
- static bool on_off(char *arg, __s8 *attr, char *val)
- {
- if (strcmp(val, "on") == 0)
- *attr = 1;
- else if (strcmp(val, "off") == 0)
- *attr = 0;
- else {
- fprintf(stderr,
- "Error: argument of \"%s\" must be \"on\" or \"off\"\n",
- arg);
- return false;
- }
- return true;
- }
- static int brlink_modify(int argc, char **argv)
- {
- struct {
- struct nlmsghdr n;
- struct ifinfomsg ifm;
- char buf[512];
- } req;
- char *d = NULL;
- __s8 learning = -1;
- __s8 learning_sync = -1;
- __s8 flood = -1;
- __s8 hairpin = -1;
- __s8 bpdu_guard = -1;
- __s8 fast_leave = -1;
- __s8 root_block = -1;
- __u32 cost = 0;
- __s16 priority = -1;
- __s8 state = -1;
- __s16 mode = -1;
- __u16 flags = 0;
- struct rtattr *nest;
- memset(&req, 0, sizeof(req));
- req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
- req.n.nlmsg_flags = NLM_F_REQUEST;
- req.n.nlmsg_type = RTM_SETLINK;
- req.ifm.ifi_family = PF_BRIDGE;
- while (argc > 0) {
- if (strcmp(*argv, "dev") == 0) {
- NEXT_ARG();
- d = *argv;
- } else if (strcmp(*argv, "guard") == 0) {
- NEXT_ARG();
- if (!on_off("guard", &bpdu_guard, *argv))
- return -1;
- } else if (strcmp(*argv, "hairpin") == 0) {
- NEXT_ARG();
- if (!on_off("hairping", &hairpin, *argv))
- return -1;
- } else if (strcmp(*argv, "fastleave") == 0) {
- NEXT_ARG();
- if (!on_off("fastleave", &fast_leave, *argv))
- return -1;
- } else if (strcmp(*argv, "root_block") == 0) {
- NEXT_ARG();
- if (!on_off("root_block", &root_block, *argv))
- return -1;
- } else if (strcmp(*argv, "learning") == 0) {
- NEXT_ARG();
- if (!on_off("learning", &learning, *argv))
- return -1;
- } else if (strcmp(*argv, "learning_sync") == 0) {
- NEXT_ARG();
- if (!on_off("learning_sync", &learning_sync, *argv))
- return -1;
- } else if (strcmp(*argv, "flood") == 0) {
- NEXT_ARG();
- if (!on_off("flood", &flood, *argv))
- return -1;
- } else if (strcmp(*argv, "cost") == 0) {
- NEXT_ARG();
- cost = atoi(*argv);
- } else if (strcmp(*argv, "priority") == 0) {
- NEXT_ARG();
- priority = atoi(*argv);
- } else if (strcmp(*argv, "state") == 0) {
- NEXT_ARG();
- char *endptr;
- size_t nstates = sizeof(port_states) / sizeof(*port_states);
- state = strtol(*argv, &endptr, 10);
- if (!(**argv != '\0' && *endptr == '\0')) {
- for (state = 0; state < nstates; state++)
- if (strcmp(port_states[state], *argv) == 0)
- break;
- if (state == nstates) {
- fprintf(stderr,
- "Error: invalid STP port state\n");
- return -1;
- }
- }
- } else if (strcmp(*argv, "hwmode") == 0) {
- NEXT_ARG();
- flags = BRIDGE_FLAGS_SELF;
- if (strcmp(*argv, "vepa") == 0)
- mode = BRIDGE_MODE_VEPA;
- else if (strcmp(*argv, "veb") == 0)
- mode = BRIDGE_MODE_VEB;
- else {
- fprintf(stderr,
- "Mode argument must be \"vepa\" or "
- "\"veb\".\n");
- return -1;
- }
- } else if (strcmp(*argv, "self") == 0) {
- flags |= BRIDGE_FLAGS_SELF;
- } else if (strcmp(*argv, "master") == 0) {
- flags |= BRIDGE_FLAGS_MASTER;
- } else {
- usage();
- }
- argc--; argv++;
- }
- if (d == NULL) {
- fprintf(stderr, "Device is a required argument.\n");
- return -1;
- }
- req.ifm.ifi_index = ll_name_to_index(d);
- if (req.ifm.ifi_index == 0) {
- fprintf(stderr, "Cannot find bridge device \"%s\"\n", d);
- return -1;
- }
- /* Nested PROTINFO attribute. Contains: port flags, cost, priority and
- * state.
- */
- nest = addattr_nest(&req.n, sizeof(req),
- IFLA_PROTINFO | NLA_F_NESTED);
- /* Flags first */
- if (bpdu_guard >= 0)
- addattr8(&req.n, sizeof(req), IFLA_BRPORT_GUARD, bpdu_guard);
- if (hairpin >= 0)
- addattr8(&req.n, sizeof(req), IFLA_BRPORT_MODE, hairpin);
- if (fast_leave >= 0)
- addattr8(&req.n, sizeof(req), IFLA_BRPORT_FAST_LEAVE,
- fast_leave);
- if (root_block >= 0)
- addattr8(&req.n, sizeof(req), IFLA_BRPORT_PROTECT, root_block);
- if (flood >= 0)
- addattr8(&req.n, sizeof(req), IFLA_BRPORT_UNICAST_FLOOD, flood);
- if (learning >= 0)
- addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING, learning);
- if (learning_sync >= 0)
- addattr8(&req.n, sizeof(req), IFLA_BRPORT_LEARNING_SYNC,
- learning_sync);
- if (cost > 0)
- addattr32(&req.n, sizeof(req), IFLA_BRPORT_COST, cost);
- if (priority >= 0)
- addattr16(&req.n, sizeof(req), IFLA_BRPORT_PRIORITY, priority);
- if (state >= 0)
- addattr8(&req.n, sizeof(req), IFLA_BRPORT_STATE, state);
- addattr_nest_end(&req.n, nest);
- /* IFLA_AF_SPEC nested attribute. Contains IFLA_BRIDGE_FLAGS that
- * designates master or self operation and IFLA_BRIDGE_MODE
- * for hw 'vepa' or 'veb' operation modes. The hwmodes are
- * only valid in 'self' mode on some devices so far.
- */
- if (mode >= 0 || flags > 0) {
- nest = addattr_nest(&req.n, sizeof(req), IFLA_AF_SPEC);
- if (flags > 0)
- addattr16(&req.n, sizeof(req), IFLA_BRIDGE_FLAGS, flags);
- if (mode >= 0)
- addattr16(&req.n, sizeof(req), IFLA_BRIDGE_MODE, mode);
- addattr_nest_end(&req.n, nest);
- }
- if (rtnl_talk(&rth, &req.n, NULL, 0) < 0)
- return -1;
- return 0;
- }
- static int brlink_show(int argc, char **argv)
- {
- char *filter_dev = NULL;
- while (argc > 0) {
- if (strcmp(*argv, "dev") == 0) {
- NEXT_ARG();
- if (filter_dev)
- duparg("dev", *argv);
- filter_dev = *argv;
- }
- argc--; argv++;
- }
- if (filter_dev) {
- if ((filter_index = ll_name_to_index(filter_dev)) == 0) {
- fprintf(stderr, "Cannot find device \"%s\"\n",
- filter_dev);
- return -1;
- }
- }
- if (rtnl_wilddump_request(&rth, PF_BRIDGE, RTM_GETLINK) < 0) {
- perror("Cannon send dump request");
- exit(1);
- }
- if (rtnl_dump_filter(&rth, print_linkinfo, stdout) < 0) {
- fprintf(stderr, "Dump terminated\n");
- exit(1);
- }
- return 0;
- }
- int do_link(int argc, char **argv)
- {
- ll_init_map(&rth);
- if (argc > 0) {
- if (matches(*argv, "set") == 0 ||
- matches(*argv, "change") == 0)
- return brlink_modify(argc-1, argv+1);
- if (matches(*argv, "show") == 0 ||
- matches(*argv, "lst") == 0 ||
- matches(*argv, "list") == 0)
- return brlink_show(argc-1, argv+1);
- if (matches(*argv, "help") == 0)
- usage();
- } else
- return brlink_show(0, NULL);
- fprintf(stderr, "Command \"%s\" is unknown, try \"bridge link help\".\n", *argv);
- exit(-1);
- }