--- /dev/null
+/*
+ * Copyright (c) 1994, 1995, 1996, 1997, 1998
+ * The Regents of the University of California. 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.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the Computer Systems
+ * Engineering Group at Lawrence Berkeley Laboratory.
+ * 4. Neither the name of the University nor of the Laboratory may be used
+ * to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
+ */
+
+#ifndef lint
+static const char rcsid[] =
+ "@(#) $Header: /usr/local/cvs/linux/tools/build/e100boot/libpcap-0.4/inet.c,v 1.1 1999/08/26 10:05:22 johana Exp $ (LBL)";
+#endif
+
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#ifdef HAVE_SYS_SOCKIO_H
+#include <sys/sockio.h>
+#endif
+#include <sys/time.h> /* concession to AIX */
+
+#if __STDC__
+struct mbuf;
+struct rtentry;
+#endif
+
+#include <net/if.h>
+#include <netinet/in.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <memory.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "pcap-int.h"
+
+#include "gnuc.h"
+#ifdef HAVE_OS_PROTO_H
+#include "os-proto.h"
+#endif
+
+/* Not all systems have IFF_LOOPBACK */
+#ifdef IFF_LOOPBACK
+#define ISLOOPBACK(p) ((p)->ifr_flags & IFF_LOOPBACK)
+#else
+#define ISLOOPBACK(p) ((p)->ifr_name[0] == 'l' && (p)->ifr_name[1] == 'o' && \
+ (isdigit((p)->ifr_name[2]) || (p)->ifr_name[2] == '\0'))
+#endif
+
+/*
+ * Return the name of a network interface attached to the system, or NULL
+ * if none can be found. The interface must be configured up; the
+ * lowest unit number is preferred; loopback is ignored.
+ */
+char *
+pcap_lookupdev(errbuf)
+ register char *errbuf;
+{
+ register int fd, minunit, n;
+ register char *cp;
+ register struct ifreq *ifrp, *ifend, *ifnext, *mp;
+ struct ifconf ifc;
+ struct ifreq ibuf[16], ifr;
+ static char device[sizeof(ifrp->ifr_name) + 1];
+
+ fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ (void)sprintf(errbuf, "socket: %s", pcap_strerror(errno));
+ return (NULL);
+ }
+ ifc.ifc_len = sizeof ibuf;
+ ifc.ifc_buf = (caddr_t)ibuf;
+
+ memset((char *)ibuf, 0, sizeof(ibuf));
+ if (ioctl(fd, SIOCGIFCONF, (char *)&ifc) < 0 ||
+ ifc.ifc_len < sizeof(struct ifreq)) {
+ (void)sprintf(errbuf, "SIOCGIFCONF: %s", pcap_strerror(errno));
+ (void)close(fd);
+ return (NULL);
+ }
+ ifrp = ibuf;
+ ifend = (struct ifreq *)((char *)ibuf + ifc.ifc_len);
+
+ mp = NULL;
+ minunit = 666;
+ for (; ifrp < ifend; ifrp = ifnext) {
+#ifdef HAVE_SOCKADDR_SA_LEN
+ n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name);
+ if (n < sizeof(*ifrp))
+ ifnext = ifrp + 1;
+ else
+ ifnext = (struct ifreq *)((char *)ifrp + n);
+ if (ifrp->ifr_addr.sa_family != AF_INET)
+ continue;
+#else
+ ifnext = ifrp + 1;
+#endif
+ /*
+ * Need a template to preserve address info that is
+ * used below to locate the next entry. (Otherwise,
+ * SIOCGIFFLAGS stomps over it because the requests
+ * are returned in a union.)
+ */
+ strncpy(ifr.ifr_name, ifrp->ifr_name, sizeof(ifr.ifr_name));
+ if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifr) < 0) {
+ if (errno == ENXIO)
+ continue;
+ (void)sprintf(errbuf, "SIOCGIFFLAGS: %.*s: %s",
+ (int)sizeof(ifr.ifr_name), ifr.ifr_name,
+ pcap_strerror(errno));
+ (void)close(fd);
+ return (NULL);
+ }
+
+ /* Must be up and not the loopback */
+ if ((ifr.ifr_flags & IFF_UP) == 0 || ISLOOPBACK(&ifr))
+ continue;
+
+ for (cp = ifrp->ifr_name; !isdigit(*cp); ++cp)
+ continue;
+ n = atoi(cp);
+ if (n < minunit) {
+ minunit = n;
+ mp = ifrp;
+ }
+ }
+ (void)close(fd);
+ if (mp == NULL) {
+ (void)strcpy(errbuf, "no suitable device found");
+ return (NULL);
+ }
+
+ (void)strncpy(device, mp->ifr_name, sizeof(device) - 1);
+ device[sizeof(device) - 1] = '\0';
+ return (device);
+}
+
+int
+pcap_lookupnet(device, netp, maskp, errbuf)
+ register char *device;
+ register bpf_u_int32 *netp, *maskp;
+ register char *errbuf;
+{
+ register int fd;
+ register struct sockaddr_in *sin;
+ struct ifreq ifr;
+
+ fd = socket(AF_INET, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ (void)sprintf(errbuf, "socket: %s", pcap_strerror(errno));
+ return (-1);
+ }
+ memset(&ifr, 0, sizeof(ifr));
+#ifdef linux
+ /* XXX Work around Linux kernel bug */
+ ifr.ifr_addr.sa_family = AF_INET;
+#endif
+ (void)strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name));
+ if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
+ (void)sprintf(errbuf, "SIOCGIFADDR: %s: %s",
+ device, pcap_strerror(errno));
+ (void)close(fd);
+ return (-1);
+ }
+ sin = (struct sockaddr_in *)&ifr.ifr_addr;
+ *netp = sin->sin_addr.s_addr;
+ if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) {
+ (void)sprintf(errbuf, "SIOCGIFNETMASK: %s: %s",
+ device, pcap_strerror(errno));
+ (void)close(fd);
+ return (-1);
+ }
+ (void)close(fd);
+ *maskp = sin->sin_addr.s_addr;
+ if (*maskp == 0) {
+ if (IN_CLASSA(*netp))
+ *maskp = IN_CLASSA_NET;
+ else if (IN_CLASSB(*netp))
+ *maskp = IN_CLASSB_NET;
+ else if (IN_CLASSC(*netp))
+ *maskp = IN_CLASSC_NET;
+ else {
+ (void)sprintf(errbuf, "inet class for 0x%x unknown",
+ *netp);
+ return (-1);
+ }
+ }
+ *netp &= *maskp;
+ return (0);
+}
projects / openwrt / svn-archive / archive.git / blobdiff