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 1.1.1.1 2017/06/14 12:01:54 misho 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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