diff options
Diffstat (limited to 'usr.sbin/tcpdump/tcpdump/inet.c')
| -rw-r--r-- | usr.sbin/tcpdump/tcpdump/inet.c | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/usr.sbin/tcpdump/tcpdump/inet.c b/usr.sbin/tcpdump/tcpdump/inet.c deleted file mode 100644 index 550129e..0000000 --- a/usr.sbin/tcpdump/tcpdump/inet.c +++ /dev/null @@ -1,172 +0,0 @@ -/* - * Copyright (c) 1990 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: (1) source code distributions - * retain the above copyright notice and this paragraph in its entirety, (2) - * distributions including binary code include the above copyright notice and - * this paragraph in its entirety in the documentation or other materials - * provided with the distribution, and (3) all advertising materials mentioning - * features or use of this software display the following acknowledgement: - * ``This product includes software developed by the University of California, - * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of - * the University nor the names of its contributors may be used to endorse - * or promote products derived from this software without specific prior - * written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF - * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -#ifndef lint -static char rcsid[] = - "@(#)$Header: inet.c,v 1.12 92/01/29 12:46:18 mccanne Exp $ (LBL)"; -#endif - -#include <stdio.h> -#include <ctype.h> -#include <strings.h> -#include <sys/types.h> -#include <sys/socket.h> -#include <sys/file.h> -#include <sys/ioctl.h> - -#include <net/if.h> -#include <netinet/in.h> - -#include "interface.h" - -/* Not all systems have IFF_LOOPBACK */ -#ifdef IFF_LOOPBACK -#define ISLOOPBACK(p) ((p)->ifr_flags & IFF_LOOPBACK) -#else -#define ISLOOPBACK(p) (strcmp((p)->ifr_name, "lo0") == 0) -#endif - -/* - * Return the name of a network interface attached to the system, or 0 - * if none can be found. The interface must be configured up; the - * lowest unit number is preferred; loopback is ignored. - */ -char * -lookup_device() -{ - struct ifreq ibuf[16], *ifrp, *ifend, *mp; - struct ifconf ifc; - int fd; - int minunit, n; - char *cp; - static char device[sizeof(ifrp->ifr_name)]; - - fd = socket(AF_INET, SOCK_DGRAM, 0); - if (fd < 0) { - perror("tcpdump: socket"); - exit(1); - } - ifc.ifc_len = sizeof ibuf; - ifc.ifc_buf = (caddr_t)ibuf; - - if (ioctl(fd, SIOCGIFCONF, (char *)&ifc) < 0 || - ifc.ifc_len < sizeof(struct ifreq)) { - perror("tcpdump: SIOCGIFCONF: "); - exit(1); - } - ifrp = ibuf; - ifend = (struct ifreq *)((char *)ibuf + ifc.ifc_len); - - mp = 0; - minunit = 666; - while (ifrp < ifend) { - struct ifreq ifr; - /* - * 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.) - */ - bcopy(ifrp->ifr_name, ifr.ifr_name, sizeof(ifr.ifr_name)); - if (ioctl(fd, SIOCGIFFLAGS, (char *)&ifr) < 0) { - fprintf(stderr, "tcpdump: SIOCGIFFLAGS: "); - perror(ifrp->ifr_name); - exit(1); - } - if ((ifr.ifr_flags & IFF_UP) && !ISLOOPBACK(&ifr)) { - for (cp = ifrp->ifr_name; !isdigit(*cp); ++cp) - ; - n = atoi(cp); - if (n < minunit) { - minunit = n; - mp = ifrp; - } - } -#if BSD >= 199006 - n = ifrp->ifr_addr.sa_len + sizeof(ifrp->ifr_name); - if (n < sizeof(*ifrp)) - ++ifrp; - else - ifrp = (struct ifreq *)((char *)ifrp + n); -#else - ++ifrp; -#endif - } - close(fd); - if (mp == 0) - return (0); - - (void)strcpy(device, mp->ifr_name); - return (device); -} - -/* - * Get the netmask of an IP address. This routine is used if - * SIOCGIFNETMASK doesn't work. - */ -static u_long -ipaddrtonetmask(addr) - u_long addr; -{ - if (IN_CLASSA(addr)) - return (IN_CLASSA_NET); - if (IN_CLASSB(addr)) - return (IN_CLASSB_NET); - if (IN_CLASSC(addr)) - return (IN_CLASSC_NET); - error("unknown IP address class: %08X", addr); - /* NOTREACHED */ -} - -void -lookup_net(device, netp, maskp) - char *device; - u_long *netp; - u_long *maskp; -{ - int fd; - struct ifreq ifr; - struct sockaddr_in *sin = (struct sockaddr_in *)&ifr.ifr_addr; - - /* Use data gram socket to get IP address. */ - if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { - perror("tcpdump: socket"); - exit(1); - } - (void)strncpy(ifr.ifr_name, device, sizeof ifr.ifr_name); - if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) { - /* - * This will fail if an IP address hasn't been assigned. - */ - *netp = 0; - *maskp = 0; - return; - } - *netp = sin->sin_addr.s_addr; - if (ioctl(fd, SIOCGIFNETMASK, (char *)&ifr) < 0) - *maskp = 0; - else - *maskp = sin->sin_addr.s_addr; - if (*maskp == 0) - *maskp = ipaddrtonetmask(*netp); - *netp &= *maskp; - (void)close(fd); -} |
