Annotation of embedaddon/freevrrpd/vrrp_moncircuit.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (c) 2001,2002 Sebastien Petit <spe@bsdfr.org>
! 3: *
! 4: * Redistribution and use in source forms, with and without modification,
! 5: * are permitted provided that the following conditions are met:
! 6: * 1. Redistributions of source code must retain the above copyright notice,
! 7: * this list of conditions and the following disclaimer.
! 8: * 2. Redistributions in binary form must reproduce the above copyright notice,
! 9: * this list of conditions and the following disclaimer in the documentation
! 10: * and/or other materials provided with the distribution. Obviously, it
! 11: * would be nice if you gave credit where credit is due but requiring it
! 12: * would be too onerous.
! 13: * 3. All advertising materials mentioning features or use of this software
! 14: * must display the following acknowledgement:
! 15: * This product includes software developed by Sebastien Petit.
! 16: * 4. Neither the name of its contributors may be used to endorse or promote
! 17: * products derived from this software without specific prior written
! 18: * permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: *
! 32: * $Id: vrrp_moncircuit.c,v 1.6 2004/04/01 15:40:52 spe Exp $
! 33: */
! 34:
! 35: #include <sys/types.h>
! 36: #include <sys/socket.h>
! 37: #include <sys/ioctl.h>
! 38: #include <net/if.h>
! 39: #include <net/if_media.h>
! 40: #include <errno.h>
! 41: #include <semaphore.h>
! 42: #include <syslog.h>
! 43: #include <stdarg.h>
! 44: #include <stdio.h>
! 45: #include <string.h>
! 46: #include <unistd.h>
! 47: #include <pthread.h>
! 48: #include "vrrp_moncircuit.h"
! 49: #include "vrrp_define.h"
! 50:
! 51: /*
! 52: * Function that returns an integer that represent a status (carrier) of a
! 53: * specified if_name interface transmited by argument
! 54: * return -3: ioctl SIOCGIFMEDIA is not supported, disable moncircuits
! 55: * return -2: interface is faulty or doesn't exist !
! 56: * return -1: error
! 57: * return 0: no carrier
! 58: * return 1: ok, carrier, interface is working
! 59: */
! 60: int vrrp_moncircuit_interface_status(int sd, char *if_name)
! 61: {
! 62: struct ifmediareq ifmr;
! 63:
! 64: if (sd < 0) {
! 65: syslog(LOG_ERR, "socket descriptor must be != -1");
! 66: return -1;
! 67: }
! 68: bzero(&ifmr, sizeof(ifmr));
! 69: strncpy(ifmr.ifm_name, if_name, sizeof(ifmr.ifm_name));
! 70:
! 71: if (ioctl(sd, SIOCGIFMEDIA, (caddr_t)&ifmr) < 0) {
! 72: if (errno == EINVAL) {
! 73: syslog(LOG_ERR, "your NIC doesn't support SIOCGIFMEDIA ioctl: %s", strerror(errno));
! 74: return -3;
! 75: }
! 76: else
! 77: syslog(LOG_ERR, "cannot do ioctl, intertface is faulty: %s", strerror(errno));
! 78: return -2;
! 79: }
! 80:
! 81: if (ifmr.ifm_status & IFM_AVALID) {
! 82: if (ifmr.ifm_status & IFM_ACTIVE)
! 83: return 1;
! 84: else
! 85: return 0;
! 86: }
! 87:
! 88: /* Interface has no carrier cable problem ? */
! 89: return 0;
! 90: }
! 91:
! 92: void *vrrp_moncircuit_monitor_thread(void *args)
! 93: {
! 94: int **args2 = (int **)args;
! 95: int delay = *args2[0];
! 96: sem_t *sem = (sem_t *)args2[1];
! 97: int numvrid, numvrid2;
! 98: int cpt;
! 99: int sd;
! 100: int returnCode;
! 101:
! 102: sd = socket(PF_INET, SOCK_DGRAM, 0);
! 103: if (sd < 0) {
! 104: syslog(LOG_ERR, "cannot open a DGRAM socket: %s", strerror(errno));
! 105: pthread_exit(NULL);
! 106: }
! 107: sem_post(sem);
! 108: for (;;) {
! 109: numvrid = 0;
! 110: while (vr_ptr[numvrid]) {
! 111: vrrp_thread_mutex_lock_monitor();
! 112: returnCode = vrrp_moncircuit_interface_status(sd, vr_ptr[numvrid]->vr_if->if_name);
! 113: vrrp_thread_mutex_unlock_monitor();
! 114: if (returnCode == -3) {
! 115: vr_ptr[numvrid]->useMonitoredCircuits = 0;
! 116: syslog(LOG_NOTICE, "monitored circuits engine disabled");
! 117: pthread_exit(NULL);
! 118: }
! 119: if ((returnCode == 1) && (! vr_ptr[numvrid]->fault)) {
! 120: if (vr_ptr[numvrid]->vr_if->nberrors < VRRP_MONCIRCUIT_MAX_ERRORS) {
! 121: if (! vr_ptr[numvrid]->vr_if->alive) {
! 122: vr_ptr[numvrid]->vr_if->alive = 1;
! 123: syslog(LOG_ERR, "interface %s is alive again, reactivate it on VRRP", vr_ptr[numvrid]->vr_if->if_name);
! 124: if (vr_ptr[numvrid]->vridsdeps) {
! 125: numvrid2 = 0;
! 126: while (vr_ptr[numvrid2]) {
! 127: cpt = 0;
! 128: while (vr_ptr[numvrid]->vridsdeps[cpt] != -1) {
! 129: if ((vr_ptr[numvrid2]->vr_id == vr_ptr[numvrid]->vridsdeps[cpt])
! 130: && (vr_ptr[numvrid2]->vr_if->alive == -1)) {
! 131: vr_ptr[numvrid2]->vr_if->alive = 1;
! 132: syslog(LOG_ERR, "VRID %d (interface %s) has been reactivated due to dependance", vr_ptr[numvrid2]->vr_id, vr_ptr[numvrid2]->vr_if->if_name);
! 133: }
! 134: cpt++;
! 135: }
! 136: numvrid2++;
! 137: }
! 138: }
! 139: }
! 140: vr_ptr[numvrid]->vr_if->checksok++;
! 141: if (vr_ptr[numvrid]->vr_if->checksok > vr_ptr[numvrid]->monitoredCircuitsClearErrorsCount) {
! 142: vr_ptr[numvrid]->vr_if->nberrors = 0;
! 143: vr_ptr[numvrid]->vr_if->checksok = 0;
! 144: syslog(LOG_NOTICE, "all errors are cleared on interface %s", vr_ptr[numvrid]->vr_if->if_name);
! 145: }
! 146: }
! 147: else {
! 148: if (! vr_ptr[numvrid]->vr_if->reportsyslog) {
! 149: syslog(LOG_ERR, "cannot reactivate interface %s, too much errors on it !", vr_ptr[numvrid]->vr_if->if_name);
! 150: vr_ptr[numvrid]->vr_if->reportsyslog = 1;
! 151: }
! 152: }
! 153: }
! 154: else {
! 155: if (vr_ptr[numvrid]->vr_if->alive == 1) {
! 156: vr_ptr[numvrid]->vr_if->nberrors++;
! 157: vr_ptr[numvrid]->vr_if->alive = 0;
! 158: vr_ptr[numvrid]->vr_if->checksok = 0;
! 159: syslog(LOG_ERR, "interface %s is faulty, deactivated from VRRP VRIDs", vr_ptr[numvrid]->vr_if->if_name);
! 160: if (vr_ptr[numvrid]->vridsdeps) {
! 161: numvrid2 = 0;
! 162: while (vr_ptr[numvrid2]) {
! 163: cpt = 0;
! 164: while (vr_ptr[numvrid]->vridsdeps[cpt] != -1) {
! 165: if ((vr_ptr[numvrid2]->vr_id == vr_ptr[numvrid]->vridsdeps[cpt])
! 166: && (vr_ptr[numvrid2]->vr_if->alive == 1)) {
! 167: vr_ptr[numvrid2]->vr_if->alive = -1;
! 168: vr_ptr[numvrid2]->vr_if->checksok = 0;
! 169: syslog(LOG_ERR, "VRID %d (interface %s) has been deactivated due to dependance", vr_ptr[numvrid2]->vr_id, vr_ptr[numvrid2]->vr_if->if_name);
! 170: }
! 171: cpt++;
! 172: }
! 173: numvrid2++;
! 174: }
! 175: }
! 176: }
! 177: }
! 178: numvrid++;
! 179: }
! 180: sleep(delay);
! 181: }
! 182:
! 183: /* Never executed */
! 184: pthread_exit(NULL);
! 185: }
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