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/* $OpenBSD: interface.c,v 1.22 2015/09/27 17:31:50 stsp Exp $ */ |
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/* |
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* Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org> |
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* Copyright (c) 2004, 2005, 2007 Esben Norby <norby@openbsd.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <sys/ioctl.h> |
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#include <sys/time.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#include <net/if.h> |
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#include <net/if_types.h> |
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#include <ctype.h> |
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#include <err.h> |
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#include <stddef.h> |
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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 <string.h> |
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#include <event.h> |
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#include "ospf6d.h" |
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#include "ospf6.h" |
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#include "log.h" |
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#include "ospfe.h" |
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void if_hello_timer(int, short, void *); |
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void if_start_hello_timer(struct iface *); |
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void if_stop_hello_timer(struct iface *); |
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void if_stop_wait_timer(struct iface *); |
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void if_wait_timer(int, short, void *); |
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void if_start_wait_timer(struct iface *); |
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void if_stop_wait_timer(struct iface *); |
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struct nbr *if_elect(struct nbr *, struct nbr *); |
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struct { |
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int state; |
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enum iface_event event; |
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enum iface_action action; |
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int new_state; |
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} iface_fsm[] = { |
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/* current state event that happened action to take resulting state */ |
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{IF_STA_DOWN, IF_EVT_UP, IF_ACT_STRT, 0}, |
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{IF_STA_WAITING, IF_EVT_BACKUP_SEEN, IF_ACT_ELECT, 0}, |
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{IF_STA_WAITING, IF_EVT_WTIMER, IF_ACT_ELECT, 0}, |
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{IF_STA_ANY, IF_EVT_WTIMER, IF_ACT_NOTHING, 0}, |
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{IF_STA_WAITING, IF_EVT_NBR_CHNG, IF_ACT_NOTHING, 0}, |
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{IF_STA_MULTI, IF_EVT_NBR_CHNG, IF_ACT_ELECT, 0}, |
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{IF_STA_ANY, IF_EVT_NBR_CHNG, IF_ACT_NOTHING, 0}, |
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{IF_STA_ANY, IF_EVT_DOWN, IF_ACT_RST, IF_STA_DOWN}, |
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{IF_STA_ANY, IF_EVT_LOOP, IF_ACT_RST, IF_STA_LOOPBACK}, |
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{IF_STA_LOOPBACK, IF_EVT_UNLOOP, IF_ACT_NOTHING, IF_STA_DOWN}, |
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{-1, IF_EVT_NOTHING, IF_ACT_NOTHING, 0}, |
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}; |
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#if 0 |
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/* TODO virtual links */ |
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static int vlink_cnt = 0; |
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#endif |
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TAILQ_HEAD(, iface) iflist; |
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const char * const if_event_names[] = { |
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"NOTHING", |
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"UP", |
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"WAITTIMER", |
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"BACKUPSEEN", |
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"NEIGHBORCHANGE", |
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"LOOP", |
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"UNLOOP", |
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"DOWN" |
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}; |
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const char * const if_action_names[] = { |
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"NOTHING", |
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"START", |
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"ELECT", |
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"RESET" |
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}; |
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int |
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if_fsm(struct iface *iface, enum iface_event event) |
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{ |
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int old_state; |
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int new_state = 0; |
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int i, ret = 0; |
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old_state = iface->state; |
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for (i = 0; iface_fsm[i].state != -1; i++) |
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if ((iface_fsm[i].state & old_state) && |
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(iface_fsm[i].event == event)) { |
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new_state = iface_fsm[i].new_state; |
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break; |
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} |
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if (iface_fsm[i].state == -1) { |
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/* event outside of the defined fsm, ignore it. */ |
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log_debug("if_fsm: interface %s, " |
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"event %s not expected in state %s", iface->name, |
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if_event_names[event], if_state_name(old_state)); |
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return (0); |
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} |
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switch (iface_fsm[i].action) { |
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case IF_ACT_STRT: |
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ret = if_act_start(iface); |
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break; |
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case IF_ACT_ELECT: |
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ret = if_act_elect(iface); |
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break; |
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case IF_ACT_RST: |
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ret = if_act_reset(iface); |
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break; |
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case IF_ACT_NOTHING: |
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/* do nothing */ |
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break; |
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} |
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if (ret) { |
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log_debug("if_fsm: error changing state for interface %s, " |
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"event %s, state %s", iface->name, if_event_names[event], |
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if_state_name(old_state)); |
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return (-1); |
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} |
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if (new_state != 0) |
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iface->state = new_state; |
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if (iface->state != old_state) { |
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orig_rtr_lsa(iface); |
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orig_link_lsa(iface); |
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/* state change inform RDE */ |
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ospfe_imsg_compose_rde(IMSG_IFINFO, iface->self->peerid, 0, |
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&iface->state, sizeof(iface->state)); |
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} |
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if (old_state & (IF_STA_MULTI | IF_STA_POINTTOPOINT) && |
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(iface->state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) == 0) |
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ospfe_demote_iface(iface, 0); |
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if ((old_state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) == 0 && |
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iface->state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) |
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ospfe_demote_iface(iface, 1); |
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log_debug("if_fsm: event %s resulted in action %s and changing " |
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"state for interface %s from %s to %s", |
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if_event_names[event], if_action_names[iface_fsm[i].action], |
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iface->name, if_state_name(old_state), if_state_name(iface->state)); |
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return (ret); |
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} |
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int |
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if_init(void) |
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{ |
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TAILQ_INIT(&iflist); |
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return (fetchifs(0)); |
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} |
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/* XXX using a linked list should be OK for now */ |
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struct iface * |
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if_find(unsigned int ifindex) |
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{ |
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struct iface *iface; |
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TAILQ_FOREACH(iface, &iflist, list) { |
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if (ifindex == iface->ifindex) |
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return (iface); |
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} |
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return (NULL); |
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} |
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struct iface * |
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if_findname(char *name) |
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{ |
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struct iface *iface; |
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TAILQ_FOREACH(iface, &iflist, list) { |
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if (!strcmp(name, iface->name)) |
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return (iface); |
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} |
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return (NULL); |
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} |
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struct iface * |
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if_new(u_short ifindex, char *ifname) |
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{ |
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struct iface *iface; |
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if ((iface = calloc(1, sizeof(*iface))) == NULL) |
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err(1, "if_new: calloc"); |
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iface->state = IF_STA_DOWN; |
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LIST_INIT(&iface->nbr_list); |
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TAILQ_INIT(&iface->ifa_list); |
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TAILQ_INIT(&iface->ls_ack_list); |
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RB_INIT(&iface->lsa_tree); |
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#if 0 |
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/* TODO */ |
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if (virtual) { |
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iface->type = IF_TYPE_VIRTUALLINK; |
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snprintf(iface->name, sizeof(iface->name), "vlink%d", |
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vlink_cnt++); |
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iface->flags |= IFF_UP; |
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iface->mtu = IP_MSS; |
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return (iface); |
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} |
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#endif |
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strlcpy(iface->name, ifname, sizeof(iface->name)); |
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iface->ifindex = ifindex; |
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TAILQ_INSERT_TAIL(&iflist, iface, list); |
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return (iface); |
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} |
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void |
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if_update(struct iface *iface, int mtu, int flags, u_int8_t type, |
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u_int8_t state, u_int64_t rate) |
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{ |
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iface->mtu = mtu; |
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iface->flags = flags; |
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iface->if_type = type; |
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iface->linkstate = state; |
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iface->baudrate = rate; |
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/* set type */ |
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if (flags & IFF_POINTOPOINT) |
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iface->type = IF_TYPE_POINTOPOINT; |
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if (flags & IFF_BROADCAST && flags & IFF_MULTICAST) |
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iface->type = IF_TYPE_BROADCAST; |
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if (flags & IFF_LOOPBACK) { |
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iface->type = IF_TYPE_POINTOPOINT; |
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iface->cflags |= F_IFACE_PASSIVE; |
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} |
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} |
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void |
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if_del(struct iface *iface) |
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{ |
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struct nbr *nbr = NULL; |
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log_debug("if_del: interface %s", iface->name); |
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264 |
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/* revert the demotion when the interface is deleted */ |
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if ((iface->state & (IF_STA_MULTI | IF_STA_POINTTOPOINT)) == 0) |
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ospfe_demote_iface(iface, 1); |
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268 |
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/* clear lists etc */ |
269 |
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while ((nbr = LIST_FIRST(&iface->nbr_list)) != NULL) |
270 |
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nbr_del(nbr); |
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272 |
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if (evtimer_pending(&iface->hello_timer, NULL)) |
273 |
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evtimer_del(&iface->hello_timer); |
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if (evtimer_pending(&iface->wait_timer, NULL)) |
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evtimer_del(&iface->wait_timer); |
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if (evtimer_pending(&iface->lsack_tx_timer, NULL)) |
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evtimer_del(&iface->lsack_tx_timer); |
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279 |
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ls_ack_list_clr(iface); |
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TAILQ_REMOVE(&iflist, iface, list); |
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free(iface); |
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} |
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void |
285 |
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if_start(struct ospfd_conf *xconf, struct iface *iface) |
286 |
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{ |
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/* init the dummy local neighbor */ |
288 |
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iface->self = nbr_new(ospfe_router_id(), iface, iface->ifindex, 1, |
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NULL); |
290 |
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291 |
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/* set event handlers for interface */ |
292 |
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evtimer_set(&iface->lsack_tx_timer, ls_ack_tx_timer, iface); |
293 |
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evtimer_set(&iface->hello_timer, if_hello_timer, iface); |
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evtimer_set(&iface->wait_timer, if_wait_timer, iface); |
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296 |
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iface->fd = xconf->ospf_socket; |
297 |
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298 |
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ospfe_demote_iface(iface, 0); |
299 |
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300 |
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if (if_fsm(iface, IF_EVT_UP)) |
301 |
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log_debug("error starting interface %s", iface->name); |
302 |
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} |
303 |
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304 |
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/* timers */ |
305 |
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/* ARGSUSED */ |
306 |
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void |
307 |
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if_hello_timer(int fd, short event, void *arg) |
308 |
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{ |
309 |
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struct iface *iface = arg; |
310 |
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struct timeval tv; |
311 |
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312 |
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send_hello(iface); |
313 |
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314 |
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/* reschedule hello_timer */ |
315 |
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timerclear(&tv); |
316 |
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tv.tv_sec = iface->hello_interval; |
317 |
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if (evtimer_add(&iface->hello_timer, &tv) == -1) |
318 |
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fatal("if_hello_timer"); |
319 |
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} |
320 |
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321 |
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void |
322 |
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if_start_hello_timer(struct iface *iface) |
323 |
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{ |
324 |
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struct timeval tv; |
325 |
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326 |
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timerclear(&tv); |
327 |
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if (evtimer_add(&iface->hello_timer, &tv) == -1) |
328 |
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fatal("if_start_hello_timer"); |
329 |
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} |
330 |
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331 |
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void |
332 |
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if_stop_hello_timer(struct iface *iface) |
333 |
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{ |
334 |
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if (evtimer_del(&iface->hello_timer) == -1) |
335 |
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fatal("if_stop_hello_timer"); |
336 |
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} |
337 |
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338 |
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/* ARGSUSED */ |
339 |
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void |
340 |
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if_wait_timer(int fd, short event, void *arg) |
341 |
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{ |
342 |
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struct iface *iface = arg; |
343 |
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344 |
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if_fsm(iface, IF_EVT_WTIMER); |
345 |
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} |
346 |
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347 |
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void |
348 |
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if_start_wait_timer(struct iface *iface) |
349 |
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{ |
350 |
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struct timeval tv; |
351 |
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352 |
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timerclear(&tv); |
353 |
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tv.tv_sec = iface->dead_interval; |
354 |
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if (evtimer_add(&iface->wait_timer, &tv) == -1) |
355 |
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fatal("if_start_wait_timer"); |
356 |
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} |
357 |
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358 |
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void |
359 |
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if_stop_wait_timer(struct iface *iface) |
360 |
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{ |
361 |
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if (evtimer_del(&iface->wait_timer) == -1) |
362 |
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fatal("if_stop_wait_timer"); |
363 |
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} |
364 |
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|
365 |
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/* actions */ |
366 |
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int |
367 |
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if_act_start(struct iface *iface) |
368 |
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{ |
369 |
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struct in6_addr addr; |
370 |
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struct timeval now; |
371 |
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|
372 |
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if (!((iface->flags & IFF_UP) && |
373 |
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LINK_STATE_IS_UP(iface->linkstate))) { |
374 |
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log_debug("if_act_start: interface %s link down", |
375 |
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iface->name); |
376 |
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return (0); |
377 |
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} |
378 |
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|
379 |
|
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if (iface->if_type == IFT_CARP && |
380 |
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!(iface->cflags & F_IFACE_PASSIVE)) { |
381 |
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/* force passive mode on carp interfaces */ |
382 |
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log_warnx("if_act_start: forcing interface %s to passive", |
383 |
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iface->name); |
384 |
|
|
iface->cflags |= F_IFACE_PASSIVE; |
385 |
|
|
} |
386 |
|
|
|
387 |
|
|
gettimeofday(&now, NULL); |
388 |
|
|
iface->uptime = now.tv_sec; |
389 |
|
|
|
390 |
|
|
/* loopback interfaces have a special state */ |
391 |
|
|
if (iface->flags & IFF_LOOPBACK) |
392 |
|
|
iface->state = IF_STA_LOOPBACK; |
393 |
|
|
|
394 |
|
|
if (iface->cflags & F_IFACE_PASSIVE) { |
395 |
|
|
/* for an update of stub network entries */ |
396 |
|
|
orig_rtr_lsa(iface); |
397 |
|
|
return (0); |
398 |
|
|
} |
399 |
|
|
|
400 |
|
|
switch (iface->type) { |
401 |
|
|
case IF_TYPE_POINTOPOINT: |
402 |
|
|
inet_pton(AF_INET6, AllSPFRouters, &addr); |
403 |
|
|
|
404 |
|
|
if (if_join_group(iface, &addr)) |
405 |
|
|
return (-1); |
406 |
|
|
iface->state = IF_STA_POINTTOPOINT; |
407 |
|
|
break; |
408 |
|
|
case IF_TYPE_VIRTUALLINK: |
409 |
|
|
iface->state = IF_STA_POINTTOPOINT; |
410 |
|
|
break; |
411 |
|
|
case IF_TYPE_POINTOMULTIPOINT: |
412 |
|
|
case IF_TYPE_NBMA: |
413 |
|
|
log_debug("if_act_start: type %s not supported, interface %s", |
414 |
|
|
if_type_name(iface->type), iface->name); |
415 |
|
|
return (-1); |
416 |
|
|
case IF_TYPE_BROADCAST: |
417 |
|
|
inet_pton(AF_INET6, AllSPFRouters, &addr); |
418 |
|
|
|
419 |
|
|
if (if_join_group(iface, &addr)) |
420 |
|
|
return (-1); |
421 |
|
|
if (iface->priority == 0) { |
422 |
|
|
iface->state = IF_STA_DROTHER; |
423 |
|
|
} else { |
424 |
|
|
iface->state = IF_STA_WAITING; |
425 |
|
|
if_start_wait_timer(iface); |
426 |
|
|
} |
427 |
|
|
break; |
428 |
|
|
default: |
429 |
|
|
fatalx("if_act_start: unknown interface type"); |
430 |
|
|
} |
431 |
|
|
|
432 |
|
|
/* hello timer needs to be started in any case */ |
433 |
|
|
if_start_hello_timer(iface); |
434 |
|
|
return (0); |
435 |
|
|
} |
436 |
|
|
|
437 |
|
|
struct nbr * |
438 |
|
|
if_elect(struct nbr *a, struct nbr *b) |
439 |
|
|
{ |
440 |
|
|
if (a->priority > b->priority) |
441 |
|
|
return (a); |
442 |
|
|
if (a->priority < b->priority) |
443 |
|
|
return (b); |
444 |
|
|
if (ntohl(a->id.s_addr) > ntohl(b->id.s_addr)) |
445 |
|
|
return (a); |
446 |
|
|
return (b); |
447 |
|
|
} |
448 |
|
|
|
449 |
|
|
int |
450 |
|
|
if_act_elect(struct iface *iface) |
451 |
|
|
{ |
452 |
|
|
struct in6_addr addr; |
453 |
|
|
struct nbr *nbr, *bdr = NULL, *dr = NULL; |
454 |
|
|
int round = 0; |
455 |
|
|
int changed = 0; |
456 |
|
|
int old_state; |
457 |
|
|
char b1[16], b2[16], b3[16], b4[16]; |
458 |
|
|
|
459 |
|
|
start: |
460 |
|
|
/* elect backup designated router */ |
461 |
|
|
LIST_FOREACH(nbr, &iface->nbr_list, entry) { |
462 |
|
|
if (nbr->priority == 0 || nbr == dr || /* not electable */ |
463 |
|
|
nbr->state & NBR_STA_PRELIM || /* not available */ |
464 |
|
|
nbr->dr.s_addr == nbr->id.s_addr) /* don't elect DR */ |
465 |
|
|
continue; |
466 |
|
|
if (bdr != NULL) { |
467 |
|
|
/* |
468 |
|
|
* routers announcing themselves as BDR have higher |
469 |
|
|
* precedence over those routers announcing a |
470 |
|
|
* different BDR. |
471 |
|
|
*/ |
472 |
|
|
if (nbr->bdr.s_addr == nbr->id.s_addr) { |
473 |
|
|
if (bdr->bdr.s_addr == bdr->id.s_addr) |
474 |
|
|
bdr = if_elect(bdr, nbr); |
475 |
|
|
else |
476 |
|
|
bdr = nbr; |
477 |
|
|
} else if (bdr->bdr.s_addr != bdr->id.s_addr) |
478 |
|
|
bdr = if_elect(bdr, nbr); |
479 |
|
|
} else |
480 |
|
|
bdr = nbr; |
481 |
|
|
} |
482 |
|
|
|
483 |
|
|
/* elect designated router */ |
484 |
|
|
LIST_FOREACH(nbr, &iface->nbr_list, entry) { |
485 |
|
|
if (nbr->priority == 0 || nbr->state & NBR_STA_PRELIM || |
486 |
|
|
(nbr != dr && nbr->dr.s_addr != nbr->id.s_addr)) |
487 |
|
|
/* only DR may be elected check priority too */ |
488 |
|
|
continue; |
489 |
|
|
if (dr == NULL) |
490 |
|
|
dr = nbr; |
491 |
|
|
else |
492 |
|
|
dr = if_elect(dr, nbr); |
493 |
|
|
} |
494 |
|
|
|
495 |
|
|
if (dr == NULL) { |
496 |
|
|
/* no designate router found use backup DR */ |
497 |
|
|
dr = bdr; |
498 |
|
|
bdr = NULL; |
499 |
|
|
} |
500 |
|
|
|
501 |
|
|
/* |
502 |
|
|
* if we are involved in the election (e.g. new DR or no |
503 |
|
|
* longer BDR) redo the election |
504 |
|
|
*/ |
505 |
|
|
if (round == 0 && |
506 |
|
|
((iface->self == dr && iface->self != iface->dr) || |
507 |
|
|
(iface->self != dr && iface->self == iface->dr) || |
508 |
|
|
(iface->self == bdr && iface->self != iface->bdr) || |
509 |
|
|
(iface->self != bdr && iface->self == iface->bdr))) { |
510 |
|
|
/* |
511 |
|
|
* Reset announced DR/BDR to calculated one, so |
512 |
|
|
* that we may get elected in the second round. |
513 |
|
|
* This is needed to drop from a DR to a BDR. |
514 |
|
|
*/ |
515 |
|
|
iface->self->dr.s_addr = dr->id.s_addr; |
516 |
|
|
if (bdr) |
517 |
|
|
iface->self->bdr.s_addr = bdr->id.s_addr; |
518 |
|
|
round = 1; |
519 |
|
|
goto start; |
520 |
|
|
} |
521 |
|
|
|
522 |
|
|
log_debug("if_act_elect: interface %s old dr %s new dr %s, " |
523 |
|
|
"old bdr %s new bdr %s", iface->name, |
524 |
|
|
iface->dr ? inet_ntop(AF_INET, &iface->dr->id, b1, sizeof(b1)) : |
525 |
|
|
"none", dr ? inet_ntop(AF_INET, &dr->id, b2, sizeof(b2)) : "none", |
526 |
|
|
iface->bdr ? inet_ntop(AF_INET, &iface->bdr->id, b3, sizeof(b3)) : |
527 |
|
|
"none", bdr ? inet_ntop(AF_INET, &bdr->id, b4, sizeof(b4)) : |
528 |
|
|
"none"); |
529 |
|
|
|
530 |
|
|
/* |
531 |
|
|
* After the second round still DR or BDR change state to DR or BDR, |
532 |
|
|
* etc. |
533 |
|
|
*/ |
534 |
|
|
old_state = iface->state; |
535 |
|
|
if (dr == iface->self) |
536 |
|
|
iface->state = IF_STA_DR; |
537 |
|
|
else if (bdr == iface->self) |
538 |
|
|
iface->state = IF_STA_BACKUP; |
539 |
|
|
else |
540 |
|
|
iface->state = IF_STA_DROTHER; |
541 |
|
|
|
542 |
|
|
/* TODO if iface is NBMA send all non eligible neighbors event Start */ |
543 |
|
|
|
544 |
|
|
/* |
545 |
|
|
* if DR or BDR changed issue a AdjOK? event for all neighbors > 2-Way |
546 |
|
|
*/ |
547 |
|
|
if (iface->dr != dr || iface->bdr != bdr) |
548 |
|
|
changed = 1; |
549 |
|
|
|
550 |
|
|
iface->dr = dr; |
551 |
|
|
iface->bdr = bdr; |
552 |
|
|
|
553 |
|
|
if (changed) { |
554 |
|
|
inet_pton(AF_INET6, AllDRouters, &addr); |
555 |
|
|
if (old_state & IF_STA_DRORBDR && |
556 |
|
|
(iface->state & IF_STA_DRORBDR) == 0) { |
557 |
|
|
if (if_leave_group(iface, &addr)) |
558 |
|
|
return (-1); |
559 |
|
|
} else if ((old_state & IF_STA_DRORBDR) == 0 && |
560 |
|
|
iface->state & IF_STA_DRORBDR) { |
561 |
|
|
if (if_join_group(iface, &addr)) |
562 |
|
|
return (-1); |
563 |
|
|
} |
564 |
|
|
|
565 |
|
|
LIST_FOREACH(nbr, &iface->nbr_list, entry) { |
566 |
|
|
if (nbr->state & NBR_STA_BIDIR) |
567 |
|
|
nbr_fsm(nbr, NBR_EVT_ADJ_OK); |
568 |
|
|
} |
569 |
|
|
|
570 |
|
|
orig_rtr_lsa(iface); |
571 |
|
|
if (iface->state & IF_STA_DR || old_state & IF_STA_DR) |
572 |
|
|
orig_net_lsa(iface); |
573 |
|
|
} |
574 |
|
|
|
575 |
|
|
if_start_hello_timer(iface); |
576 |
|
|
return (0); |
577 |
|
|
} |
578 |
|
|
|
579 |
|
|
int |
580 |
|
|
if_act_reset(struct iface *iface) |
581 |
|
|
{ |
582 |
|
|
struct nbr *nbr = NULL; |
583 |
|
|
struct in6_addr addr; |
584 |
|
|
|
585 |
|
|
if (iface->cflags & F_IFACE_PASSIVE) { |
586 |
|
|
/* for an update of stub network entries */ |
587 |
|
|
orig_rtr_lsa(iface); |
588 |
|
|
return (0); |
589 |
|
|
} |
590 |
|
|
|
591 |
|
|
switch (iface->type) { |
592 |
|
|
case IF_TYPE_POINTOPOINT: |
593 |
|
|
case IF_TYPE_BROADCAST: |
594 |
|
|
inet_pton(AF_INET6, AllSPFRouters, &addr); |
595 |
|
|
if (if_leave_group(iface, &addr)) { |
596 |
|
|
log_warnx("if_act_reset: error leaving group %s, " |
597 |
|
|
"interface %s", log_in6addr(&addr), iface->name); |
598 |
|
|
} |
599 |
|
|
if (iface->state & IF_STA_DRORBDR) { |
600 |
|
|
inet_pton(AF_INET6, AllDRouters, &addr); |
601 |
|
|
if (if_leave_group(iface, &addr)) { |
602 |
|
|
log_warnx("if_act_reset: " |
603 |
|
|
"error leaving group %s, interface %s", |
604 |
|
|
log_in6addr(&addr), iface->name); |
605 |
|
|
} |
606 |
|
|
} |
607 |
|
|
break; |
608 |
|
|
case IF_TYPE_VIRTUALLINK: |
609 |
|
|
/* nothing */ |
610 |
|
|
break; |
611 |
|
|
case IF_TYPE_NBMA: |
612 |
|
|
case IF_TYPE_POINTOMULTIPOINT: |
613 |
|
|
log_debug("if_act_reset: type %s not supported, interface %s", |
614 |
|
|
if_type_name(iface->type), iface->name); |
615 |
|
|
return (-1); |
616 |
|
|
default: |
617 |
|
|
fatalx("if_act_reset: unknown interface type"); |
618 |
|
|
} |
619 |
|
|
|
620 |
|
|
LIST_FOREACH(nbr, &iface->nbr_list, entry) { |
621 |
|
|
if (nbr_fsm(nbr, NBR_EVT_KILL_NBR)) { |
622 |
|
|
log_debug("if_act_reset: error killing neighbor %s", |
623 |
|
|
inet_ntoa(nbr->id)); |
624 |
|
|
} |
625 |
|
|
} |
626 |
|
|
|
627 |
|
|
iface->dr = NULL; |
628 |
|
|
iface->bdr = NULL; |
629 |
|
|
|
630 |
|
|
ls_ack_list_clr(iface); |
631 |
|
|
stop_ls_ack_tx_timer(iface); |
632 |
|
|
if_stop_hello_timer(iface); |
633 |
|
|
if_stop_wait_timer(iface); |
634 |
|
|
|
635 |
|
|
/* send empty hello to tell everybody that we are going down */ |
636 |
|
|
send_hello(iface); |
637 |
|
|
|
638 |
|
|
return (0); |
639 |
|
|
} |
640 |
|
|
|
641 |
|
|
struct ctl_iface * |
642 |
|
|
if_to_ctl(struct iface *iface) |
643 |
|
|
{ |
644 |
|
|
static struct ctl_iface ictl; |
645 |
|
|
struct timeval tv, now, res; |
646 |
|
|
struct nbr *nbr; |
647 |
|
|
|
648 |
|
|
memcpy(ictl.name, iface->name, sizeof(ictl.name)); |
649 |
|
|
memcpy(&ictl.addr, &iface->addr, sizeof(ictl.addr)); |
650 |
|
|
ictl.rtr_id.s_addr = ospfe_router_id(); |
651 |
|
|
memcpy(&ictl.area, &iface->area_id, sizeof(ictl.area)); |
652 |
|
|
if (iface->dr) { |
653 |
|
|
memcpy(&ictl.dr_id, &iface->dr->id, sizeof(ictl.dr_id)); |
654 |
|
|
memcpy(&ictl.dr_addr, &iface->dr->addr, sizeof(ictl.dr_addr)); |
655 |
|
|
} else { |
656 |
|
|
bzero(&ictl.dr_id, sizeof(ictl.dr_id)); |
657 |
|
|
bzero(&ictl.dr_addr, sizeof(ictl.dr_addr)); |
658 |
|
|
} |
659 |
|
|
if (iface->bdr) { |
660 |
|
|
memcpy(&ictl.bdr_id, &iface->bdr->id, sizeof(ictl.bdr_id)); |
661 |
|
|
memcpy(&ictl.bdr_addr, &iface->bdr->addr, |
662 |
|
|
sizeof(ictl.bdr_addr)); |
663 |
|
|
} else { |
664 |
|
|
bzero(&ictl.bdr_id, sizeof(ictl.bdr_id)); |
665 |
|
|
bzero(&ictl.bdr_addr, sizeof(ictl.bdr_addr)); |
666 |
|
|
} |
667 |
|
|
ictl.ifindex = iface->ifindex; |
668 |
|
|
ictl.state = iface->state; |
669 |
|
|
ictl.mtu = iface->mtu; |
670 |
|
|
ictl.nbr_cnt = 0; |
671 |
|
|
ictl.adj_cnt = 0; |
672 |
|
|
ictl.baudrate = iface->baudrate; |
673 |
|
|
ictl.dead_interval = iface->dead_interval; |
674 |
|
|
ictl.transmit_delay = iface->transmit_delay; |
675 |
|
|
ictl.hello_interval = iface->hello_interval; |
676 |
|
|
ictl.flags = iface->flags; |
677 |
|
|
ictl.metric = iface->metric; |
678 |
|
|
ictl.rxmt_interval = iface->rxmt_interval; |
679 |
|
|
ictl.type = iface->type; |
680 |
|
|
ictl.linkstate = iface->linkstate; |
681 |
|
|
ictl.if_type = iface->if_type; |
682 |
|
|
ictl.priority = iface->priority; |
683 |
|
|
ictl.passive = (iface->cflags & F_IFACE_PASSIVE) == F_IFACE_PASSIVE; |
684 |
|
|
|
685 |
|
|
gettimeofday(&now, NULL); |
686 |
|
|
if (evtimer_pending(&iface->hello_timer, &tv)) { |
687 |
|
|
timersub(&tv, &now, &res); |
688 |
|
|
ictl.hello_timer = res.tv_sec; |
689 |
|
|
} else |
690 |
|
|
ictl.hello_timer = -1; |
691 |
|
|
|
692 |
|
|
if (iface->state != IF_STA_DOWN) { |
693 |
|
|
ictl.uptime = now.tv_sec - iface->uptime; |
694 |
|
|
} else |
695 |
|
|
ictl.uptime = 0; |
696 |
|
|
|
697 |
|
|
LIST_FOREACH(nbr, &iface->nbr_list, entry) { |
698 |
|
|
if (nbr == iface->self) |
699 |
|
|
continue; |
700 |
|
|
ictl.nbr_cnt++; |
701 |
|
|
if (nbr->state & NBR_STA_ADJFORM) |
702 |
|
|
ictl.adj_cnt++; |
703 |
|
|
} |
704 |
|
|
|
705 |
|
|
return (&ictl); |
706 |
|
|
} |
707 |
|
|
|
708 |
|
|
/* misc */ |
709 |
|
|
void |
710 |
|
|
if_set_recvbuf(int fd) |
711 |
|
|
{ |
712 |
|
|
int bsize; |
713 |
|
|
|
714 |
|
|
bsize = 65535; |
715 |
|
|
while (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &bsize, |
716 |
|
|
sizeof(bsize)) == -1) |
717 |
|
|
bsize /= 2; |
718 |
|
|
} |
719 |
|
|
|
720 |
|
|
int |
721 |
|
|
if_join_group(struct iface *iface, struct in6_addr *addr) |
722 |
|
|
{ |
723 |
|
|
struct ipv6_mreq mreq; |
724 |
|
|
|
725 |
|
|
switch (iface->type) { |
726 |
|
|
case IF_TYPE_POINTOPOINT: |
727 |
|
|
case IF_TYPE_BROADCAST: |
728 |
|
|
log_debug("if_join_group: interface %s addr %s", |
729 |
|
|
iface->name, log_in6addr(addr)); |
730 |
|
|
mreq.ipv6mr_multiaddr = *addr; |
731 |
|
|
mreq.ipv6mr_interface = iface->ifindex; |
732 |
|
|
|
733 |
|
|
if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, |
734 |
|
|
&mreq, sizeof(mreq)) < 0) { |
735 |
|
|
log_warn("if_join_group: error IPV6_JOIN_GROUP, " |
736 |
|
|
"interface %s address %s", iface->name, |
737 |
|
|
log_in6addr(addr)); |
738 |
|
|
return (-1); |
739 |
|
|
} |
740 |
|
|
break; |
741 |
|
|
case IF_TYPE_POINTOMULTIPOINT: |
742 |
|
|
case IF_TYPE_VIRTUALLINK: |
743 |
|
|
case IF_TYPE_NBMA: |
744 |
|
|
log_debug("if_join_group: type %s not supported, interface %s", |
745 |
|
|
if_type_name(iface->type), iface->name); |
746 |
|
|
return (-1); |
747 |
|
|
default: |
748 |
|
|
fatalx("if_join_group: unknown interface type"); |
749 |
|
|
} |
750 |
|
|
|
751 |
|
|
return (0); |
752 |
|
|
} |
753 |
|
|
|
754 |
|
|
int |
755 |
|
|
if_leave_group(struct iface *iface, struct in6_addr *addr) |
756 |
|
|
{ |
757 |
|
|
struct ipv6_mreq mreq; |
758 |
|
|
|
759 |
|
|
switch (iface->type) { |
760 |
|
|
case IF_TYPE_POINTOPOINT: |
761 |
|
|
case IF_TYPE_BROADCAST: |
762 |
|
|
log_debug("if_leave_group: interface %s addr %s", |
763 |
|
|
iface->name, log_in6addr(addr)); |
764 |
|
|
mreq.ipv6mr_multiaddr = *addr; |
765 |
|
|
mreq.ipv6mr_interface = iface->ifindex; |
766 |
|
|
|
767 |
|
|
if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_LEAVE_GROUP, |
768 |
|
|
(void *)&mreq, sizeof(mreq)) < 0) { |
769 |
|
|
log_warn("if_leave_group: error IPV6_LEAVE_GROUP, " |
770 |
|
|
"interface %s address %s", iface->name, |
771 |
|
|
log_in6addr(addr)); |
772 |
|
|
return (-1); |
773 |
|
|
} |
774 |
|
|
break; |
775 |
|
|
case IF_TYPE_POINTOMULTIPOINT: |
776 |
|
|
case IF_TYPE_VIRTUALLINK: |
777 |
|
|
case IF_TYPE_NBMA: |
778 |
|
|
log_debug("if_leave_group: type %s not supported, interface %s", |
779 |
|
|
if_type_name(iface->type), iface->name); |
780 |
|
|
return (-1); |
781 |
|
|
default: |
782 |
|
|
fatalx("if_leave_group: unknown interface type"); |
783 |
|
|
} |
784 |
|
|
return (0); |
785 |
|
|
} |
786 |
|
|
|
787 |
|
|
int |
788 |
|
|
if_set_mcast(struct iface *iface) |
789 |
|
|
{ |
790 |
|
|
switch (iface->type) { |
791 |
|
|
case IF_TYPE_POINTOPOINT: |
792 |
|
|
case IF_TYPE_BROADCAST: |
793 |
|
|
if (setsockopt(iface->fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, |
794 |
|
|
&iface->ifindex, sizeof(iface->ifindex)) < 0) { |
795 |
|
|
log_debug("if_set_mcast: error setting " |
796 |
|
|
"IP_MULTICAST_IF, interface %s", iface->name); |
797 |
|
|
return (-1); |
798 |
|
|
} |
799 |
|
|
break; |
800 |
|
|
case IF_TYPE_POINTOMULTIPOINT: |
801 |
|
|
case IF_TYPE_VIRTUALLINK: |
802 |
|
|
case IF_TYPE_NBMA: |
803 |
|
|
log_debug("if_set_mcast: type %s not supported, interface %s", |
804 |
|
|
if_type_name(iface->type), iface->name); |
805 |
|
|
return (-1); |
806 |
|
|
default: |
807 |
|
|
fatalx("if_set_mcast: unknown interface type"); |
808 |
|
|
} |
809 |
|
|
|
810 |
|
|
return (0); |
811 |
|
|
} |
812 |
|
|
|
813 |
|
|
int |
814 |
|
|
if_set_mcast_loop(int fd) |
815 |
|
|
{ |
816 |
|
|
u_int loop = 0; |
817 |
|
|
|
818 |
|
|
if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, |
819 |
|
|
(u_int *)&loop, sizeof(loop)) < 0) { |
820 |
|
|
log_warn("if_set_mcast_loop: error setting " |
821 |
|
|
"IPV6_MULTICAST_LOOP"); |
822 |
|
|
return (-1); |
823 |
|
|
} |
824 |
|
|
|
825 |
|
|
return (0); |
826 |
|
|
} |
827 |
|
|
|
828 |
|
|
int |
829 |
|
|
if_set_ipv6_pktinfo(int fd, int enable) |
830 |
|
|
{ |
831 |
|
|
if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &enable, |
832 |
|
|
sizeof(enable)) < 0) { |
833 |
|
|
log_warn("if_set_ipv6_pktinfo: error setting IPV6_PKTINFO"); |
834 |
|
|
return (-1); |
835 |
|
|
} |
836 |
|
|
|
837 |
|
|
return (0); |
838 |
|
|
} |
839 |
|
|
|
840 |
|
|
int |
841 |
|
|
if_set_ipv6_checksum(int fd) |
842 |
|
|
{ |
843 |
|
|
int offset = offsetof(struct ospf_hdr, chksum); |
844 |
|
|
|
845 |
|
|
log_debug("if_set_ipv6_checksum setting cksum offset to %d", offset); |
846 |
|
|
if (setsockopt(fd, IPPROTO_IPV6, IPV6_CHECKSUM, &offset, |
847 |
|
|
sizeof(offset)) < 0) { |
848 |
|
|
log_warn("if_set_ipv6_checksum: error setting IPV6_CHECKSUM"); |
849 |
|
|
return (-1); |
850 |
|
|
} |
851 |
|
|
return (0); |
852 |
|
|
} |