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