diff options
Diffstat (limited to 'keyexchange/isakmpd-20041012/if.c')
| -rw-r--r-- | keyexchange/isakmpd-20041012/if.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/keyexchange/isakmpd-20041012/if.c b/keyexchange/isakmpd-20041012/if.c new file mode 100644 index 0000000..b9cf927 --- /dev/null +++ b/keyexchange/isakmpd-20041012/if.c @@ -0,0 +1,152 @@ +/* $OpenBSD: if.c,v 1.22 2004/06/14 09:55:41 ho Exp $ */ +/* $EOM: if.c,v 1.12 1999/10/01 13:45:20 niklas Exp $ */ + +/* + * Copyright (c) 1998, 1999 Niklas Hallqvist. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * This code was written under funding by Ericsson Radio Systems. + */ + +#include <sys/ioctl.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <net/if.h> +#include <stdlib.h> +#include <unistd.h> +#ifdef HAVE_GETIFADDRS +#include <ifaddrs.h> +#endif + +#include "sysdep.h" + +#include "log.h" +#include "monitor.h" +#include "if.h" + +#ifndef HAVE_GETIFADDRS +/* XXX Unsafe if either x or y has side-effects. */ +#ifndef MAX +#define MAX(x, y) ((x) > (y) ? (x) : (y)) +#endif + +/* Most boxes has less than 16 interfaces, so this might be a good guess. */ +#define INITIAL_IFREQ_COUNT 16 + +/* + * Get all network interface configurations. + * Return 0 if successful, -1 otherwise. + */ +int +siocgifconf(struct ifconf *ifcp) +{ + caddr_t buf, new_buf; + int s, len; + + /* Get a socket to ask for the network interface configurations. */ + s = socket(AF_INET, SOCK_DGRAM, 0); + if (s == -1) { + log_error("siocgifconf: " + "socket (AF_INET, SOCK_DGRAM, 0) failed"); + return -1; + } + len = sizeof(struct ifreq) * INITIAL_IFREQ_COUNT; + buf = 0; + while (1) { + /* + * Allocate a larger buffer each time around the loop and get + * the network interfaces configurations into it. + */ + new_buf = realloc(buf, len); + if (!new_buf) { + log_error("siocgifconf: realloc (%p, %d) failed", buf, + len); + goto err; + } + ifcp->ifc_len = len; + ifcp->ifc_buf = buf = new_buf; + if (ioctl(s, SIOCGIFCONF, ifcp) == -1) { + log_error("siocgifconf: ioctl (%d, SIOCGIFCONF, ...) " + "failed", s); + goto err; + } + + /* + * If there is place for another ifreq we can be sure that the + * buffer was big enough, otherwise double the size and try + * again. + */ + if (len - ifcp->ifc_len >= sizeof(struct ifreq)) + break; + len *= 2; + } + close(s); + return 0; + +err: + if (buf) + free(buf); + ifcp->ifc_len = 0; + ifcp->ifc_buf = 0; + close(s); + return -1; +} +#endif + +int +if_map(int (*func)(char *, struct sockaddr *, void *), void *arg) +{ + int err = 0; + +#ifdef HAVE_GETIFADDRS + struct ifaddrs *ifap, *ifa; + + if (getifaddrs(&ifap) < 0) + return -1; + + for (ifa = ifap; ifa; ifa = ifa->ifa_next) + if ((*func)(ifa->ifa_name, ifa->ifa_addr, arg) == -1) + err = -1; + freeifaddrs(ifap); +#else + struct ifconf ifc; + struct ifreq *ifrp; + caddr_t limit, p; + size_t len; + + if (siocgifconf(&ifc)) + return -1; + + limit = ifc.ifc_buf + ifc.ifc_len; + for (p = ifc.ifc_buf; p < limit; p += len) { + ifrp = (struct ifreq *)p; + if ((*func)(ifrp->ifr_name, &ifrp->ifr_addr, arg) == -1) + err = -1; + len = sizeof ifrp->ifr_name + + MAX(sysdep_sa_len(&ifrp->ifr_addr), sizeof ifrp->ifr_addr); + } + free(ifc.ifc_buf); +#endif + return err; +} |