diff options
Diffstat (limited to 'lib/libpcap/pcap-bpf.c')
| -rw-r--r-- | lib/libpcap/pcap-bpf.c | 235 |
1 files changed, 0 insertions, 235 deletions
diff --git a/lib/libpcap/pcap-bpf.c b/lib/libpcap/pcap-bpf.c deleted file mode 100644 index b576f04..0000000 --- a/lib/libpcap/pcap-bpf.c +++ /dev/null @@ -1,235 +0,0 @@ -/* - * Copyright (c) 1993, 1994 - * 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: /home/ncvs/src/lib/libpcap/pcap-bpf.c,v 1.1.1.1 1995/01/20 04:13:03 jkh Exp $ (LBL)"; -#endif - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <netdb.h> -#include <ctype.h> -#include <signal.h> -#include <errno.h> -#include <sys/param.h> /* optionally get BSD define */ -#include <sys/time.h> -#include <sys/timeb.h> -#include <sys/socket.h> -#include <sys/file.h> -#include <sys/ioctl.h> -#include <net/bpf.h> -#include <net/if.h> -#include <string.h> - -#include "pcap-int.h" - -int -pcap_stats(pcap_t *p, struct pcap_stat *ps) -{ - struct bpf_stat s; - - if (ioctl(p->fd, BIOCGSTATS, &s) < 0) { - sprintf(p->errbuf, "BIOCGSTATS: %s", pcap_strerror(errno)); - return (-1); - } - - ps->ps_recv = s.bs_recv; - ps->ps_drop = s.bs_drop; - return (0); -} - -int -pcap_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) -{ - int cc; - int n = 0; - register u_char *bp, *ep; - - again: - cc = p->cc; - if (p->cc == 0) { - cc = read(p->fd, (char *)p->buffer, p->bufsize); - if (cc < 0) { - /* Don't choke when we get ptraced */ - switch (errno) { - - case EINTR: - goto again; - - case EWOULDBLOCK: - return (0); -#if defined(sun) && !defined(BSD) - /* - * Due to a SunOS bug, after 2^31 bytes, the kernel - * file offset overflows and read fails with EINVAL. - * The lseek() to 0 will fix things. - */ - case EINVAL: - if ((long)(tell(p->fd) + p->bufsize) < 0) { - (void)lseek(p->fd, 0, 0); - goto again; - } - /* fall through */ -#endif - } - sprintf(p->errbuf, "read: %s", pcap_strerror(errno)); - return (-1); - } - bp = p->buffer; - } else - bp = p->bp; - - /* - * Loop through each packet. - */ -#define bhp ((struct bpf_hdr *)bp) - ep = bp + cc; - while (bp < ep) { - register int caplen, hdrlen; - caplen = bhp->bh_caplen; - hdrlen = bhp->bh_hdrlen; - /* - * XXX A bpf_hdr matches a pcap_pkthdr. - */ - (*callback)(user, (struct pcap_pkthdr*)bp, bp + hdrlen); - bp += BPF_WORDALIGN(caplen + hdrlen); - if (++n >= cnt && cnt > 0) { - p->bp = bp; - p->cc = ep - bp; - return (n); - } - } -#undef bhp - p->cc = 0; - return (n); -} - -static inline int -bpf_open(pcap_t *p, char *errbuf) -{ - int fd; - int n = 0; - char device[sizeof "/dev/bpf000"]; - - /* - * Go through all the minors and find one that isn't in use. - */ - do { - (void)sprintf(device, "/dev/bpf%d", n++); - fd = open(device, O_RDONLY); - } while (fd < 0 && errno == EBUSY); - - /* - * XXX better message for all minors used - */ - if (fd < 0) - sprintf(errbuf, "%s: %s", device, pcap_strerror(errno)); - - return (fd); -} - -pcap_t * -pcap_open_live(char *device, int snaplen, int promisc, int to_ms, char *ebuf) -{ - int fd; - struct ifreq ifr; - struct bpf_version bv; - u_int v; - pcap_t *p; - - p = (pcap_t *)malloc(sizeof(*p)); - if (p == NULL) { - sprintf(ebuf, "malloc: %s", pcap_strerror(errno)); - return (NULL); - } - bzero(p, sizeof(*p)); - fd = bpf_open(p, ebuf); - if (fd < 0) - goto bad; - - p->fd = fd; - p->snapshot = snaplen; - - if (ioctl(fd, BIOCVERSION, (caddr_t)&bv) < 0) { - sprintf(ebuf, "BIOCVERSION: %s", pcap_strerror(errno)); - goto bad; - } - if (bv.bv_major != BPF_MAJOR_VERSION || - bv.bv_minor < BPF_MINOR_VERSION) { - sprintf(ebuf, "kernel bpf filter out of date"); - goto bad; - } - (void)strncpy(ifr.ifr_name, device, sizeof(ifr.ifr_name)); - if (ioctl(fd, BIOCSETIF, (caddr_t)&ifr) < 0) { - sprintf(ebuf, "%s: %s", device, pcap_strerror(errno)); - goto bad; - } - /* Get the data link layer type. */ - if (ioctl(fd, BIOCGDLT, (caddr_t)&v) < 0) { - sprintf(ebuf, "BIOCGDLT: %s", pcap_strerror(errno)); - goto bad; - } - p->linktype = v; - - /* set timeout */ - if (to_ms != 0) { - struct timeval to; - to.tv_sec = to_ms / 1000; - to.tv_usec = (to_ms * 1000) % 1000000; - if (ioctl(p->fd, BIOCSRTIMEOUT, (caddr_t)&to) < 0) { - sprintf(ebuf, "BIOCSRTIMEOUT: %s", - pcap_strerror(errno)); - goto bad; - } - } - if (promisc) - /* set promiscuous mode, okay if it fails */ - (void)ioctl(p->fd, BIOCPROMISC, NULL); - - if (ioctl(fd, BIOCGBLEN, (caddr_t)&v) < 0) { - sprintf(ebuf, "BIOCGBLEN: %s", pcap_strerror(errno)); - goto bad; - } - p->bufsize = v; - p->buffer = (u_char*)malloc(p->bufsize); - if (p->buffer == NULL) { - sprintf(ebuf, "malloc: %s", pcap_strerror(errno)); - goto bad; - } - - return (p); - bad: - free(p); - return (NULL); -} - -int -pcap_setfilter(pcap_t *p, struct bpf_program *fp) -{ - if (p->sf.rfile != NULL) - p->fcode = *fp; - else if (ioctl(p->fd, BIOCSETF, (caddr_t)fp) < 0) { - sprintf(p->errbuf, "BIOCSETF: %s", pcap_strerror(errno)); - return (-1); - } - return (0); -} |
