Annotation of embedaddon/freevrrpd/vrrp_interface.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_interface.c,v 1.5 2004/04/01 13:14:54 spe Exp $
! 33: */
! 34:
! 35: #include "vrrp_interface.h"
! 36:
! 37: void
! 38: vrrp_interface_owner_verify(struct vrrp_vr * vr)
! 39: {
! 40: int cpt, cpt2;
! 41:
! 42: for (cpt = 0; cpt < vr->cnt_ip; cpt++)
! 43: for (cpt2 = 0; cpt2 < vr->vr_if->nb_ip; cpt2++)
! 44: if (vr->vr_ip[cpt].addr.s_addr == vr->vr_if->ip_addrs[cpt2].s_addr)
! 45: vr->vr_ip[cpt].owner = VRRP_INTERFACE_IPADDR_OWNER;
! 46:
! 47: return;
! 48: }
! 49:
! 50: char
! 51: vrrp_interface_mac_set(char *if_name, struct ether_addr * ethaddr)
! 52: {
! 53: int sd;
! 54: struct ifreq ifr;
! 55:
! 56: bzero(&ifr, sizeof(ifr));
! 57: sd = socket(AF_INET, SOCK_DGRAM, 0);
! 58: if (sd == -1) {
! 59: syslog(LOG_WARNING, "cannot open socket for deleting ip address of interface %s: %s", if_name, strerror(errno));
! 60: return -1;
! 61: }
! 62: strncpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name));
! 63: ifr.ifr_addr.sa_len = ETHER_ADDR_LEN;
! 64: ifr.ifr_addr.sa_family = AF_LINK;
! 65: bcopy(ethaddr, ifr.ifr_addr.sa_data, ETHER_ADDR_LEN);
! 66: if (ioctl(sd, SIOCSIFLLADDR, (caddr_t) & ifr) == -1) {
! 67: syslog(LOG_ERR, "cannot set mac address for interface %s (ioctl): %s", if_name, strerror(errno));
! 68: return -1;
! 69: }
! 70:
! 71: return 0;
! 72: }
! 73:
! 74: /* Set VMAC for parent interface + all child VLANs */
! 75: int
! 76: vrrp_interface_all_ethaddr_set(struct vrrp_vr *vr, struct ether_addr *ethaddr) {
! 77: struct vrrp_vlan_list *vl = vr->vr_if->vlanp->next;
! 78:
! 79: while (vl != vr->vr_if->vland) {
! 80: if (vrrp_interface_mac_set(vl->vlan_ifname, ethaddr) == -1)
! 81: return -1;
! 82: vl = vl->next;
! 83: }
! 84:
! 85: return 0;
! 86: }
! 87:
! 88: in_addr_t
! 89: vrrp_interface_compute_netmask(u_int nbbits)
! 90: {
! 91: int cpt = 0;
! 92: in_addr_t netmask = 0;
! 93:
! 94: if (nbbits > 32) {
! 95: syslog(LOG_ERR, "specified netmask is invalid: /%u", nbbits);
! 96: syslog(LOG_ERR, "netmask /32 or 255.255.255.255 is applied");
! 97: return 0xFFFFFFFF;
! 98: }
! 99: while (cpt < nbbits) {
! 100: netmask |= (in_addr_t) pow(2, 31 - cpt);
! 101: cpt++;
! 102: }
! 103:
! 104: return netmask;
! 105: }
! 106:
! 107: char
! 108: vrrp_interface_ipaddr_set(char *if_name, struct in_addr addr, in_addr_t netmask)
! 109: {
! 110: int sd;
! 111: struct ifaliasreq ifra;
! 112:
! 113: bzero(&ifra, sizeof(ifra));
! 114: sd = socket(AF_INET, SOCK_DGRAM, 0);
! 115: if (sd == -1) {
! 116: syslog(LOG_WARNING, "cannot open socket for adding ip address of interface %s: %s", if_name, strerror(errno));
! 117: return -1;
! 118: }
! 119: strncpy(ifra.ifra_name, if_name, sizeof(ifra.ifra_name));
! 120: ifra.ifra_addr.sa_len = sizeof(struct sockaddr_in);
! 121: ifra.ifra_addr.sa_family = AF_INET;
! 122: ((struct sockaddr_in *) & ifra.ifra_addr)->sin_addr = addr;
! 123: ifra.ifra_mask.sa_len = sizeof(struct sockaddr_in);
! 124: ifra.ifra_mask.sa_family = AF_INET;
! 125: ((struct sockaddr_in *) & ifra.ifra_mask)->sin_addr.s_addr = htonl(netmask);
! 126: if (ioctl(sd, SIOCAIFADDR, &ifra) == -1) {
! 127: syslog(LOG_ERR, "cannot set ip addr %s for interface %s (ioctl SIOCAIFADDR): %s", inet_ntoa(addr), if_name, strerror(errno));
! 128: close(sd);
! 129: return -1;
! 130: }
! 131: close(sd);
! 132:
! 133: return 0;
! 134: }
! 135:
! 136: char
! 137: vrrp_interface_ipaddr_delete(char *if_name, struct in_addr addr, int verbose)
! 138: {
! 139: int sd;
! 140: struct ifreq ifr;
! 141:
! 142: bzero(&ifr, sizeof(ifr));
! 143: sd = socket(AF_INET, SOCK_DGRAM, 0);
! 144: if (sd == -1) {
! 145: syslog(LOG_WARNING, "cannot open socket for deleting ip address of interface %s: %s", if_name, strerror(errno));
! 146: return -1;
! 147: }
! 148: strncpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name));
! 149: ifr.ifr_addr.sa_len = sizeof(struct sockaddr_in);
! 150: ifr.ifr_addr.sa_family = AF_INET;
! 151: ((struct sockaddr_in *) & ifr.ifr_addr)->sin_addr = addr;
! 152: if ((ioctl(sd, SIOCDIFADDR, (char *)&ifr) == -1) && verbose) {
! 153: syslog(LOG_ERR, "cannot delete ip addr %s for interface %s (ioctl SIOCDIFADDR): %s", inet_ntoa(addr), if_name, strerror(errno));
! 154: close(sd);
! 155: return -1;
! 156: }
! 157: close(sd);
! 158:
! 159: return 0;
! 160: }
! 161:
! 162: char
! 163: vrrp_interface_vripaddr_set(struct vrrp_vr * vr)
! 164: {
! 165: int cpt;
! 166:
! 167: for (cpt = 0; cpt < vr->cnt_ip; cpt++) {
! 168: if (!vr->vr_ip[cpt].owner) {
! 169: if (vrrp_interface_ipaddr_set(vr->viface_name, vr->vr_ip[cpt].addr, vrrp_interface_compute_netmask(vr->vr_netmask[cpt])) == -1) {
! 170: if (errno != EEXIST) {
! 171: syslog(LOG_ERR, "vrid [%d] Error occured during setting virtual router ip address %s", vr->vr_id, inet_ntoa(vr->vr_ip[cpt].addr));
! 172: return -1;
! 173: }
! 174: }
! 175: }
! 176: }
! 177:
! 178: return 0;
! 179: }
! 180:
! 181: char
! 182: vrrp_interface_vripaddr_delete(struct vrrp_vr * vr)
! 183: {
! 184: int cpt;
! 185:
! 186: for (cpt = 0; cpt < vr->cnt_ip; cpt++) {
! 187: if (vr->vr_ip[cpt].owner != VRRP_INTERFACE_IPADDR_OWNER) {
! 188: if (vrrp_interface_ipaddr_delete(vr->viface_name, vr->vr_ip[cpt].addr, 0) == -1) {
! 189: if (errno != EADDRNOTAVAIL) {
! 190: syslog(LOG_ERR, "vrid [%d] Error occured during deleting virtual router ip address %s", vr->vr_id, inet_ntoa(vr->vr_ip[cpt].addr));
! 191: return -1;
! 192: }
! 193: }
! 194: }
! 195: }
! 196:
! 197: return 0;
! 198: }
! 199:
! 200:
! 201:
! 202: char
! 203: vrrp_interface_set_flags(char *if_name, int value) {
! 204: int sd;
! 205: struct ifreq ifr;
! 206: int flags;
! 207:
! 208: bzero(&ifr, sizeof(ifr));
! 209: strncpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name));
! 210: sd = socket(AF_INET, SOCK_DGRAM, 0);
! 211: if (sd == -1)
! 212: return -1;
! 213: if (ioctl(sd, SIOCGIFFLAGS, (caddr_t)&ifr) < 0) {
! 214: close(sd);
! 215: return -1;
! 216: }
! 217: flags = (ifr.ifr_flags & 0xffff) | (ifr.ifr_flagshigh << 16);
! 218:
! 219: if (value < 0) {
! 220: value = -value;
! 221: flags &= ~value;
! 222: } else
! 223: flags |= value;
! 224: ifr.ifr_flags = flags & 0xffff;
! 225: ifr.ifr_flagshigh = flags >> 16;
! 226:
! 227: if (ioctl(sd, SIOCSIFFLAGS, (caddr_t)&ifr) < 0) {
! 228: close(sd);
! 229: return -1;
! 230: }
! 231:
! 232: close(sd);
! 233:
! 234: return 0;
! 235: }
! 236:
! 237: char
! 238: vrrp_interface_promiscuous(char *if_name) {
! 239: return vrrp_interface_set_flags(if_name, IFF_PPROMISC);
! 240: }
! 241:
! 242: char
! 243: vrrp_interface_nopromiscuous(char *if_name) {
! 244: return vrrp_interface_set_flags(if_name, -IFF_PPROMISC);
! 245: }
! 246:
! 247: char
! 248: vrrp_interface_up(char *if_name) {
! 249: return vrrp_interface_set_flags(if_name, IFF_UP);
! 250: }
! 251:
! 252: char
! 253: vrrp_interface_down(char *if_name) {
! 254: return vrrp_interface_set_flags(if_name, -IFF_UP);
! 255: }
! 256:
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