diff options
Diffstat (limited to 'package/etrax-tools/src/e100boot/libpcap-0.4/inet.c')
| -rw-r--r-- | package/etrax-tools/src/e100boot/libpcap-0.4/inet.c | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/package/etrax-tools/src/e100boot/libpcap-0.4/inet.c b/package/etrax-tools/src/e100boot/libpcap-0.4/inet.c new file mode 100644 index 000000000..ddb3a15df --- /dev/null +++ b/package/etrax-tools/src/e100boot/libpcap-0.4/inet.c @@ -0,0 +1,219 @@ +/* + * 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); +} |