1353 lines
32 KiB
C
1353 lines
32 KiB
C
/*
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* Copyright (c) 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* This code contributed by Atanu Ghosh (atanu@cs.ucl.ac.uk),
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* University College London.
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*/
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/*
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* Packet capture routine for dlpi under SunOS 5
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*
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* Notes:
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*
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* - Apparently the DLIOCRAW ioctl() is specific to SunOS.
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*
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* - There is a bug in bufmod(7) such that setting the snapshot
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* length results in data being left of the front of the packet.
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*
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* - It might be desirable to use pfmod(7) to filter packets in the
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* kernel.
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*/
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#ifndef lint
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static const char rcsid[] =
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"@(#) $Header: /tcpdump/master/libpcap/pcap-dlpi.c,v 1.74 2001/12/10 07:14:15 guy Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/types.h>
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#include <sys/time.h>
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#ifdef HAVE_SYS_BUFMOD_H
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#include <sys/bufmod.h>
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#endif
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#include <sys/dlpi.h>
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#ifdef HAVE_SYS_DLPI_EXT_H
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#include <sys/dlpi_ext.h>
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#endif
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#ifdef HAVE_HPUX9
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#include <sys/socket.h>
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#endif
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#ifdef DL_HP_PPA_ACK_OBS
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#include <sys/stat.h>
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#endif
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#include <sys/stream.h>
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#if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
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#include <sys/systeminfo.h>
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#endif
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#ifdef HAVE_HPUX9
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#include <net/if.h>
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#endif
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#include <ctype.h>
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#ifdef HAVE_HPUX9
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#include <nlist.h>
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <memory.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stropts.h>
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#include <unistd.h>
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#include "pcap-int.h"
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#ifdef HAVE_OS_PROTO_H
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#include "os-proto.h"
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#endif
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#ifndef PCAP_DEV_PREFIX
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#ifdef _AIX
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#define PCAP_DEV_PREFIX "/dev/dlpi"
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#else
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#define PCAP_DEV_PREFIX "/dev"
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#endif
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#endif
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#define MAXDLBUF 8192
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/* Forwards */
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static char *split_dname(char *, int *, char *);
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static int dlattachreq(int, bpf_u_int32, char *);
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static int dlbindack(int, char *, char *);
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static int dlbindreq(int, bpf_u_int32, char *);
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static int dlinfoack(int, char *, char *);
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static int dlinforeq(int, char *);
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static int dlokack(int, const char *, char *, char *);
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static int recv_ack(int, int, const char *, char *, char *);
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static char *dlstrerror(bpf_u_int32);
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static char *dlprim(bpf_u_int32);
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static int dlpromisconreq(int, bpf_u_int32, char *);
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#if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
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static char *get_release(bpf_u_int32 *, bpf_u_int32 *, bpf_u_int32 *);
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#endif
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static int send_request(int, char *, int, char *, char *);
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#ifdef HAVE_SYS_BUFMOD_H
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static int strioctl(int, int, int, char *);
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#endif
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#ifdef HAVE_HPUX9
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static int dlpi_kread(int, off_t, void *, u_int, char *);
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#endif
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#ifdef HAVE_DEV_DLPI
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static int get_dlpi_ppa(int, const char *, int, char *);
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#endif
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int
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pcap_stats(pcap_t *p, struct pcap_stat *ps)
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{
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/*
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* "ps_recv" counts packets handed to the filter, not packets
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* that passed the filter. As filtering is done in userland,
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* this does not include packets dropped because we ran out
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* of buffer space.
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*
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* "ps_drop" counts packets dropped inside the DLPI service
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* provider device device because of flow control requirements
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* or resource exhaustion; it doesn't count packets dropped by
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* the interface driver, or packets dropped upstream. As
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* filtering is done in userland, it counts packets regardless
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* of whether they would've passed the filter.
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*
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* These statistics don't include packets not yet read from
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* the kernel by libpcap, but they may include packets not
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* yet read from libpcap by the application.
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*/
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*ps = p->md.stat;
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return (0);
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}
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/* XXX Needed by HP-UX (at least) */
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static bpf_u_int32 ctlbuf[MAXDLBUF];
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static struct strbuf ctl = {
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MAXDLBUF,
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0,
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(char *)ctlbuf
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};
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int
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pcap_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
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{
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register int cc, n, caplen, origlen;
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register u_char *bp, *ep, *pk;
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register struct bpf_insn *fcode;
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#ifdef HAVE_SYS_BUFMOD_H
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register struct sb_hdr *sbp;
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#ifdef LBL_ALIGN
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struct sb_hdr sbhdr;
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#endif
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#endif
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int flags;
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struct strbuf data;
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struct pcap_pkthdr pkthdr;
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flags = 0;
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cc = p->cc;
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if (cc == 0) {
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data.buf = (char *)p->buffer + p->offset;
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data.maxlen = MAXDLBUF;
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data.len = 0;
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do {
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if (getmsg(p->fd, &ctl, &data, &flags) < 0) {
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/* Don't choke when we get ptraced */
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if (errno == EINTR) {
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cc = 0;
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continue;
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}
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strlcpy(p->errbuf, pcap_strerror(errno),
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sizeof(p->errbuf));
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return (-1);
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}
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cc = data.len;
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} while (cc == 0);
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bp = p->buffer + p->offset;
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} else
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bp = p->bp;
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/* Loop through packets */
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fcode = p->fcode.bf_insns;
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ep = bp + cc;
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n = 0;
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#ifdef HAVE_SYS_BUFMOD_H
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while (bp < ep) {
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#ifdef LBL_ALIGN
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if ((long)bp & 3) {
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sbp = &sbhdr;
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memcpy(sbp, bp, sizeof(*sbp));
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} else
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#endif
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sbp = (struct sb_hdr *)bp;
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p->md.stat.ps_drop += sbp->sbh_drops;
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pk = bp + sizeof(*sbp);
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bp += sbp->sbh_totlen;
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origlen = sbp->sbh_origlen;
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caplen = sbp->sbh_msglen;
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#else
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origlen = cc;
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caplen = min(p->snapshot, cc);
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pk = bp;
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bp += caplen;
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#endif
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++p->md.stat.ps_recv;
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if (bpf_filter(fcode, pk, origlen, caplen)) {
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#ifdef HAVE_SYS_BUFMOD_H
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pkthdr.ts = sbp->sbh_timestamp;
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#else
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(void)gettimeofday(&pkthdr.ts, NULL);
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#endif
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pkthdr.len = origlen;
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pkthdr.caplen = caplen;
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/* Insure caplen does not exceed snapshot */
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if (pkthdr.caplen > p->snapshot)
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pkthdr.caplen = p->snapshot;
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(*callback)(user, &pkthdr, pk);
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if (++n >= cnt && cnt >= 0) {
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p->cc = ep - bp;
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p->bp = bp;
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return (n);
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}
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}
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#ifdef HAVE_SYS_BUFMOD_H
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}
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#endif
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p->cc = 0;
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return (n);
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}
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pcap_t *
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pcap_open_live(char *device, int snaplen, int promisc, int to_ms, char *ebuf)
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{
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register char *cp;
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register pcap_t *p;
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int ppa;
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register dl_info_ack_t *infop;
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#ifdef HAVE_SYS_BUFMOD_H
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bpf_u_int32 ss, flag;
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#ifdef HAVE_SOLARIS
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register char *release;
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bpf_u_int32 osmajor, osminor, osmicro;
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#endif
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#endif
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bpf_u_int32 buf[MAXDLBUF];
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char dname[100];
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#ifndef HAVE_DEV_DLPI
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char dname2[100];
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#endif
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p = (pcap_t *)malloc(sizeof(*p));
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if (p == NULL) {
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strlcpy(ebuf, pcap_strerror(errno), PCAP_ERRBUF_SIZE);
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return (NULL);
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}
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memset(p, 0, sizeof(*p));
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p->fd = -1; /* indicate that it hasn't been opened yet */
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#ifdef HAVE_DEV_DLPI
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/*
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** Remove any "/dev/" on the front of the device.
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*/
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cp = strrchr(device, '/');
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if (cp == NULL)
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cp = device;
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else
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cp++;
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strlcpy(dname, cp, sizeof(dname));
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/*
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* Split the device name into a device type name and a unit number;
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* chop off the unit number, so "dname" is just a device type name.
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*/
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cp = split_dname(dname, &ppa, ebuf);
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if (cp == NULL)
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goto bad;
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*cp = '\0';
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/*
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* Use "/dev/dlpi" as the device.
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*
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* XXX - HP's DLPI Programmer's Guide for HP-UX 11.00 says that
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* the "dl_mjr_num" field is for the "major number of interface
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* driver"; that's the major of "/dev/dlpi" on the system on
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* which I tried this, but there may be DLPI devices that
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* use a different driver, in which case we may need to
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* search "/dev" for the appropriate device with that major
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* device number, rather than hardwiring "/dev/dlpi".
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*/
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cp = "/dev/dlpi";
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if ((p->fd = open(cp, O_RDWR)) < 0) {
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snprintf(ebuf, PCAP_ERRBUF_SIZE,
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"%s: %s", cp, pcap_strerror(errno));
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goto bad;
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}
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/*
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* Get a table of all PPAs for that device, and search that
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* table for the specified device type name and unit number.
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*/
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ppa = get_dlpi_ppa(p->fd, dname, ppa, ebuf);
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if (ppa < 0)
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goto bad;
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#else
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/*
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* Get the unit number, and a pointer to the end of the device
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* type name.
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*/
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cp = split_dname(device, &ppa, ebuf);
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if (cp == NULL)
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goto bad;
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|
|
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/*
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* If the device name begins with "/", assume it begins with
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* the pathname of the directory containing the device to open;
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* otherwise, concatenate the device directory name and the
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* device name.
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*/
|
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if (*device == '/')
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strlcpy(dname, device, sizeof(dname));
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else
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snprintf(dname, sizeof(dname), "%s/%s", PCAP_DEV_PREFIX,
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device);
|
|
|
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/*
|
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* Make a copy of the device pathname, and then remove the unit
|
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* number from the device pathname.
|
|
*/
|
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strlcpy(dname2, dname, sizeof(dname));
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*(dname + strlen(dname) - strlen(cp)) = '\0';
|
|
|
|
/* Try device without unit number */
|
|
if ((p->fd = open(dname, O_RDWR)) < 0) {
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|
if (errno != ENOENT) {
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|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s: %s", dname,
|
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pcap_strerror(errno));
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|
goto bad;
|
|
}
|
|
|
|
/* Try again with unit number */
|
|
if ((p->fd = open(dname2, O_RDWR)) < 0) {
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snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s: %s", dname2,
|
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pcap_strerror(errno));
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goto bad;
|
|
}
|
|
/* XXX Assume unit zero */
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ppa = 0;
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|
}
|
|
#endif
|
|
|
|
p->snapshot = snaplen;
|
|
|
|
/*
|
|
** Attach if "style 2" provider
|
|
*/
|
|
if (dlinforeq(p->fd, ebuf) < 0 ||
|
|
dlinfoack(p->fd, (char *)buf, ebuf) < 0)
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goto bad;
|
|
infop = &((union DL_primitives *)buf)->info_ack;
|
|
if (infop->dl_provider_style == DL_STYLE2 &&
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(dlattachreq(p->fd, ppa, ebuf) < 0 ||
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dlokack(p->fd, "attach", (char *)buf, ebuf) < 0))
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goto bad;
|
|
/*
|
|
** Bind (defer if using HP-UX 9 or HP-UX 10.20, totally skip if
|
|
** using SINIX)
|
|
*/
|
|
#if !defined(HAVE_HPUX9) && !defined(HAVE_HPUX10_20) && !defined(sinix)
|
|
#ifdef _AIX
|
|
/* According to IBM's AIX Support Line, the dl_sap value
|
|
** should not be less than 0x600 (1536) for standard Ethernet.
|
|
** However, we seem to get DL_BADADDR - "DLSAP addr in improper
|
|
** format or invalid" - errors if we use 1537 on the "tr0"
|
|
** device, which, given that its name starts with "tr" and that
|
|
** it's IBM, probably means a Token Ring device. (Perhaps we
|
|
** need to use 1537 on "/dev/dlpi/en" because that device is for
|
|
** D/I/X Ethernet, the "SAP" is actually an Ethernet type, and
|
|
** it rejects invalid Ethernet types.)
|
|
**
|
|
** So if 1537 fails, we try 2, as Hyung Sik Yoon of IBM Korea
|
|
** says that works on Token Ring (he says that 0 does *not*
|
|
** work; perhaps that's considered an invalid LLC SAP value - I
|
|
** assume the SAP value in a DLPI bind is an LLC SAP for network
|
|
** types that use 802.2 LLC).
|
|
*/
|
|
if ((dlbindreq(p->fd, 1537, ebuf) < 0 &&
|
|
dlbindreq(p->fd, 2, ebuf) < 0) ||
|
|
#else
|
|
if (dlbindreq(p->fd, 0, ebuf) < 0 ||
|
|
#endif
|
|
dlbindack(p->fd, (char *)buf, ebuf) < 0)
|
|
goto bad;
|
|
#endif
|
|
|
|
if (promisc) {
|
|
/*
|
|
** Enable promiscuous
|
|
*/
|
|
if (dlpromisconreq(p->fd, DL_PROMISC_PHYS, ebuf) < 0 ||
|
|
dlokack(p->fd, "promisc_phys", (char *)buf, ebuf) < 0)
|
|
goto bad;
|
|
|
|
/*
|
|
** Try to enable multicast (you would have thought
|
|
** promiscuous would be sufficient). (Skip if using
|
|
** HP-UX or SINIX)
|
|
*/
|
|
#if !defined(__hpux) && !defined(sinix)
|
|
if (dlpromisconreq(p->fd, DL_PROMISC_MULTI, ebuf) < 0 ||
|
|
dlokack(p->fd, "promisc_multi", (char *)buf, ebuf) < 0)
|
|
fprintf(stderr,
|
|
"WARNING: DL_PROMISC_MULTI failed (%s)\n", ebuf);
|
|
#endif
|
|
}
|
|
/*
|
|
** Try to enable sap (when not in promiscuous mode when using
|
|
** using HP-UX and never under SINIX)
|
|
*/
|
|
#ifndef sinix
|
|
if (
|
|
#ifdef __hpux
|
|
!promisc &&
|
|
#endif
|
|
(dlpromisconreq(p->fd, DL_PROMISC_SAP, ebuf) < 0 ||
|
|
dlokack(p->fd, "promisc_sap", (char *)buf, ebuf) < 0)) {
|
|
/* Not fatal if promisc since the DL_PROMISC_PHYS worked */
|
|
if (promisc)
|
|
fprintf(stderr,
|
|
"WARNING: DL_PROMISC_SAP failed (%s)\n", ebuf);
|
|
else
|
|
goto bad;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
** HP-UX 9 and HP-UX 10.20 must bind after setting promiscuous
|
|
** options)
|
|
*/
|
|
#if defined(HAVE_HPUX9) || defined(HAVE_HPUX10_20)
|
|
if (dlbindreq(p->fd, 0, ebuf) < 0 ||
|
|
dlbindack(p->fd, (char *)buf, ebuf) < 0)
|
|
goto bad;
|
|
#endif
|
|
|
|
/*
|
|
** Determine link type
|
|
*/
|
|
if (dlinforeq(p->fd, ebuf) < 0 ||
|
|
dlinfoack(p->fd, (char *)buf, ebuf) < 0)
|
|
goto bad;
|
|
|
|
infop = &((union DL_primitives *)buf)->info_ack;
|
|
switch (infop->dl_mac_type) {
|
|
|
|
case DL_CSMACD:
|
|
case DL_ETHER:
|
|
p->linktype = DLT_EN10MB;
|
|
p->offset = 2;
|
|
break;
|
|
|
|
case DL_FDDI:
|
|
p->linktype = DLT_FDDI;
|
|
p->offset = 3;
|
|
break;
|
|
|
|
case DL_TPR:
|
|
p->linktype = DLT_IEEE802;
|
|
p->offset = 2;
|
|
break;
|
|
|
|
default:
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "unknown mac type %lu",
|
|
infop->dl_mac_type);
|
|
goto bad;
|
|
}
|
|
|
|
#ifdef DLIOCRAW
|
|
/*
|
|
** This is a non standard SunOS hack to get the ethernet header.
|
|
*/
|
|
if (strioctl(p->fd, DLIOCRAW, 0, NULL) < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "DLIOCRAW: %s",
|
|
pcap_strerror(errno));
|
|
goto bad;
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_SYS_BUFMOD_H
|
|
/*
|
|
** Another non standard call to get the data nicely buffered
|
|
*/
|
|
if (ioctl(p->fd, I_PUSH, "bufmod") != 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "I_PUSH bufmod: %s",
|
|
pcap_strerror(errno));
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
** Now that the bufmod is pushed lets configure it.
|
|
**
|
|
** There is a bug in bufmod(7). When dealing with messages of
|
|
** less than snaplen size it strips data from the beginning not
|
|
** the end.
|
|
**
|
|
** This bug is supposed to be fixed in 5.3.2. Also, there is a
|
|
** patch available. Ask for bugid 1149065.
|
|
*/
|
|
ss = snaplen;
|
|
#ifdef HAVE_SOLARIS
|
|
release = get_release(&osmajor, &osminor, &osmicro);
|
|
if (osmajor == 5 && (osminor <= 2 || (osminor == 3 && osmicro < 2)) &&
|
|
getenv("BUFMOD_FIXED") == NULL) {
|
|
fprintf(stderr,
|
|
"WARNING: bufmod is broken in SunOS %s; ignoring snaplen.\n",
|
|
release);
|
|
ss = 0;
|
|
}
|
|
#endif
|
|
if (ss > 0 &&
|
|
strioctl(p->fd, SBIOCSSNAP, sizeof(ss), (char *)&ss) != 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "SBIOCSSNAP: %s",
|
|
pcap_strerror(errno));
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
** Set up the bufmod flags
|
|
*/
|
|
if (strioctl(p->fd, SBIOCGFLAGS, sizeof(flag), (char *)&flag) < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "SBIOCGFLAGS: %s",
|
|
pcap_strerror(errno));
|
|
goto bad;
|
|
}
|
|
flag |= SB_NO_DROPS;
|
|
if (strioctl(p->fd, SBIOCSFLAGS, sizeof(flag), (char *)&flag) != 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "SBIOCSFLAGS: %s",
|
|
pcap_strerror(errno));
|
|
goto bad;
|
|
}
|
|
/*
|
|
** Set up the bufmod timeout
|
|
*/
|
|
if (to_ms != 0) {
|
|
struct timeval to;
|
|
|
|
to.tv_sec = to_ms / 1000;
|
|
to.tv_usec = (to_ms * 1000) % 1000000;
|
|
if (strioctl(p->fd, SBIOCSTIME, sizeof(to), (char *)&to) != 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "SBIOCSTIME: %s",
|
|
pcap_strerror(errno));
|
|
goto bad;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
** As the last operation flush the read side.
|
|
*/
|
|
if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "FLUSHR: %s",
|
|
pcap_strerror(errno));
|
|
goto bad;
|
|
}
|
|
/* Allocate data buffer */
|
|
p->bufsize = MAXDLBUF * sizeof(bpf_u_int32);
|
|
p->buffer = (u_char *)malloc(p->bufsize + p->offset);
|
|
|
|
return (p);
|
|
bad:
|
|
if (p->fd >= 0)
|
|
close(p->fd);
|
|
free(p);
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Split a device name into a device type name and a unit number;
|
|
* return the a pointer to the beginning of the unit number, which
|
|
* is the end of the device type name, and set "*unitp" to the unit
|
|
* number.
|
|
*
|
|
* Returns NULL on error, and fills "ebuf" with an error message.
|
|
*/
|
|
static char *
|
|
split_dname(char *device, int *unitp, char *ebuf)
|
|
{
|
|
char *cp;
|
|
char *eos;
|
|
int unit;
|
|
|
|
/*
|
|
* Look for a number at the end of the device name string.
|
|
*/
|
|
cp = device + strlen(device) - 1;
|
|
if (*cp < '0' || *cp > '9') {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s missing unit number",
|
|
device);
|
|
return (NULL);
|
|
}
|
|
|
|
/* Digits at end of string are unit number */
|
|
while (cp-1 >= device && *(cp-1) >= '0' && *(cp-1) <= '9')
|
|
cp--;
|
|
|
|
unit = strtol(cp, &eos, 10);
|
|
if (*eos != '\0') {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s bad unit number", device);
|
|
return (NULL);
|
|
}
|
|
*unitp = unit;
|
|
return (cp);
|
|
}
|
|
|
|
int
|
|
pcap_setfilter(pcap_t *p, struct bpf_program *fp)
|
|
{
|
|
|
|
if (install_bpf_program(p, fp) < 0)
|
|
return (-1);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
send_request(int fd, char *ptr, int len, char *what, char *ebuf)
|
|
{
|
|
struct strbuf ctl;
|
|
int flags;
|
|
|
|
ctl.maxlen = 0;
|
|
ctl.len = len;
|
|
ctl.buf = ptr;
|
|
|
|
flags = 0;
|
|
if (putmsg(fd, &ctl, (struct strbuf *) NULL, flags) < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"send_request: putmsg \"%s\": %s",
|
|
what, pcap_strerror(errno));
|
|
return (-1);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
recv_ack(int fd, int size, const char *what, char *bufp, char *ebuf)
|
|
{
|
|
union DL_primitives *dlp;
|
|
struct strbuf ctl;
|
|
int flags;
|
|
|
|
ctl.maxlen = MAXDLBUF;
|
|
ctl.len = 0;
|
|
ctl.buf = bufp;
|
|
|
|
flags = 0;
|
|
if (getmsg(fd, &ctl, (struct strbuf*)NULL, &flags) < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "recv_ack: %s getmsg: %s",
|
|
what, pcap_strerror(errno));
|
|
return (-1);
|
|
}
|
|
|
|
dlp = (union DL_primitives *) ctl.buf;
|
|
switch (dlp->dl_primitive) {
|
|
|
|
case DL_INFO_ACK:
|
|
case DL_BIND_ACK:
|
|
case DL_OK_ACK:
|
|
#ifdef DL_HP_PPA_ACK
|
|
case DL_HP_PPA_ACK:
|
|
#endif
|
|
/* These are OK */
|
|
break;
|
|
|
|
case DL_ERROR_ACK:
|
|
switch (dlp->error_ack.dl_errno) {
|
|
|
|
case DL_SYSERR:
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"recv_ack: %s: UNIX error - %s",
|
|
what, pcap_strerror(dlp->error_ack.dl_unix_errno));
|
|
break;
|
|
|
|
default:
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "recv_ack: %s: %s",
|
|
what, dlstrerror(dlp->error_ack.dl_errno));
|
|
break;
|
|
}
|
|
return (-1);
|
|
|
|
default:
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"recv_ack: %s: Unexpected primitive ack %s",
|
|
what, dlprim(dlp->dl_primitive));
|
|
return (-1);
|
|
}
|
|
|
|
if (ctl.len < size) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"recv_ack: %s: Ack too small (%d < %d)",
|
|
what, ctl.len, size);
|
|
return (-1);
|
|
}
|
|
return (ctl.len);
|
|
}
|
|
|
|
static char *
|
|
dlstrerror(bpf_u_int32 dl_errno)
|
|
{
|
|
static char errstring[6+2+8+1];
|
|
|
|
switch (dl_errno) {
|
|
|
|
case DL_ACCESS:
|
|
return ("Improper permissions for request");
|
|
|
|
case DL_BADADDR:
|
|
return ("DLSAP addr in improper format or invalid");
|
|
|
|
case DL_BADCORR:
|
|
return ("Seq number not from outstand DL_CONN_IND");
|
|
|
|
case DL_BADDATA:
|
|
return ("User data exceeded provider limit");
|
|
|
|
case DL_BADPPA:
|
|
#ifdef HAVE_DEV_DLPI
|
|
/*
|
|
* With a single "/dev/dlpi" device used for all
|
|
* DLPI providers, PPAs have nothing to do with
|
|
* unit numbers.
|
|
*/
|
|
return ("Specified PPA was invalid");
|
|
#else
|
|
/*
|
|
* We have separate devices for separate devices;
|
|
* the PPA is just the unit number.
|
|
*/
|
|
return ("Specified PPA (device unit) was invalid");
|
|
#endif
|
|
|
|
case DL_BADPRIM:
|
|
return ("Primitive received not known by provider");
|
|
|
|
case DL_BADQOSPARAM:
|
|
return ("QOS parameters contained invalid values");
|
|
|
|
case DL_BADQOSTYPE:
|
|
return ("QOS structure type is unknown/unsupported");
|
|
|
|
case DL_BADSAP:
|
|
return ("Bad LSAP selector");
|
|
|
|
case DL_BADTOKEN:
|
|
return ("Token used not an active stream");
|
|
|
|
case DL_BOUND:
|
|
return ("Attempted second bind with dl_max_conind");
|
|
|
|
case DL_INITFAILED:
|
|
return ("Physical link initialization failed");
|
|
|
|
case DL_NOADDR:
|
|
return ("Provider couldn't allocate alternate address");
|
|
|
|
case DL_NOTINIT:
|
|
return ("Physical link not initialized");
|
|
|
|
case DL_OUTSTATE:
|
|
return ("Primitive issued in improper state");
|
|
|
|
case DL_SYSERR:
|
|
return ("UNIX system error occurred");
|
|
|
|
case DL_UNSUPPORTED:
|
|
return ("Requested service not supplied by provider");
|
|
|
|
case DL_UNDELIVERABLE:
|
|
return ("Previous data unit could not be delivered");
|
|
|
|
case DL_NOTSUPPORTED:
|
|
return ("Primitive is known but not supported");
|
|
|
|
case DL_TOOMANY:
|
|
return ("Limit exceeded");
|
|
|
|
case DL_NOTENAB:
|
|
return ("Promiscuous mode not enabled");
|
|
|
|
case DL_BUSY:
|
|
return ("Other streams for PPA in post-attached");
|
|
|
|
case DL_NOAUTO:
|
|
return ("Automatic handling XID&TEST not supported");
|
|
|
|
case DL_NOXIDAUTO:
|
|
return ("Automatic handling of XID not supported");
|
|
|
|
case DL_NOTESTAUTO:
|
|
return ("Automatic handling of TEST not supported");
|
|
|
|
case DL_XIDAUTO:
|
|
return ("Automatic handling of XID response");
|
|
|
|
case DL_TESTAUTO:
|
|
return ("Automatic handling of TEST response");
|
|
|
|
case DL_PENDING:
|
|
return ("Pending outstanding connect indications");
|
|
|
|
default:
|
|
sprintf(errstring, "Error %02x", dl_errno);
|
|
return (errstring);
|
|
}
|
|
}
|
|
|
|
static char *
|
|
dlprim(bpf_u_int32 prim)
|
|
{
|
|
static char primbuf[80];
|
|
|
|
switch (prim) {
|
|
|
|
case DL_INFO_REQ:
|
|
return ("DL_INFO_REQ");
|
|
|
|
case DL_INFO_ACK:
|
|
return ("DL_INFO_ACK");
|
|
|
|
case DL_ATTACH_REQ:
|
|
return ("DL_ATTACH_REQ");
|
|
|
|
case DL_DETACH_REQ:
|
|
return ("DL_DETACH_REQ");
|
|
|
|
case DL_BIND_REQ:
|
|
return ("DL_BIND_REQ");
|
|
|
|
case DL_BIND_ACK:
|
|
return ("DL_BIND_ACK");
|
|
|
|
case DL_UNBIND_REQ:
|
|
return ("DL_UNBIND_REQ");
|
|
|
|
case DL_OK_ACK:
|
|
return ("DL_OK_ACK");
|
|
|
|
case DL_ERROR_ACK:
|
|
return ("DL_ERROR_ACK");
|
|
|
|
case DL_SUBS_BIND_REQ:
|
|
return ("DL_SUBS_BIND_REQ");
|
|
|
|
case DL_SUBS_BIND_ACK:
|
|
return ("DL_SUBS_BIND_ACK");
|
|
|
|
case DL_UNITDATA_REQ:
|
|
return ("DL_UNITDATA_REQ");
|
|
|
|
case DL_UNITDATA_IND:
|
|
return ("DL_UNITDATA_IND");
|
|
|
|
case DL_UDERROR_IND:
|
|
return ("DL_UDERROR_IND");
|
|
|
|
case DL_UDQOS_REQ:
|
|
return ("DL_UDQOS_REQ");
|
|
|
|
case DL_CONNECT_REQ:
|
|
return ("DL_CONNECT_REQ");
|
|
|
|
case DL_CONNECT_IND:
|
|
return ("DL_CONNECT_IND");
|
|
|
|
case DL_CONNECT_RES:
|
|
return ("DL_CONNECT_RES");
|
|
|
|
case DL_CONNECT_CON:
|
|
return ("DL_CONNECT_CON");
|
|
|
|
case DL_TOKEN_REQ:
|
|
return ("DL_TOKEN_REQ");
|
|
|
|
case DL_TOKEN_ACK:
|
|
return ("DL_TOKEN_ACK");
|
|
|
|
case DL_DISCONNECT_REQ:
|
|
return ("DL_DISCONNECT_REQ");
|
|
|
|
case DL_DISCONNECT_IND:
|
|
return ("DL_DISCONNECT_IND");
|
|
|
|
case DL_RESET_REQ:
|
|
return ("DL_RESET_REQ");
|
|
|
|
case DL_RESET_IND:
|
|
return ("DL_RESET_IND");
|
|
|
|
case DL_RESET_RES:
|
|
return ("DL_RESET_RES");
|
|
|
|
case DL_RESET_CON:
|
|
return ("DL_RESET_CON");
|
|
|
|
default:
|
|
(void) sprintf(primbuf, "unknown primitive 0x%x", prim);
|
|
return (primbuf);
|
|
}
|
|
}
|
|
|
|
static int
|
|
dlattachreq(int fd, bpf_u_int32 ppa, char *ebuf)
|
|
{
|
|
dl_attach_req_t req;
|
|
|
|
req.dl_primitive = DL_ATTACH_REQ;
|
|
req.dl_ppa = ppa;
|
|
|
|
return (send_request(fd, (char *)&req, sizeof(req), "attach", ebuf));
|
|
}
|
|
|
|
static int
|
|
dlbindreq(int fd, bpf_u_int32 sap, char *ebuf)
|
|
{
|
|
|
|
dl_bind_req_t req;
|
|
|
|
memset((char *)&req, 0, sizeof(req));
|
|
req.dl_primitive = DL_BIND_REQ;
|
|
#ifdef DL_HP_RAWDLS
|
|
req.dl_max_conind = 1; /* XXX magic number */
|
|
/* 22 is INSAP as per the HP-UX DLPI Programmer's Guide */
|
|
req.dl_sap = 22;
|
|
req.dl_service_mode = DL_HP_RAWDLS;
|
|
#else
|
|
req.dl_sap = sap;
|
|
#ifdef DL_CLDLS
|
|
req.dl_service_mode = DL_CLDLS;
|
|
#endif
|
|
#endif
|
|
|
|
return (send_request(fd, (char *)&req, sizeof(req), "bind", ebuf));
|
|
}
|
|
|
|
static int
|
|
dlbindack(int fd, char *bufp, char *ebuf)
|
|
{
|
|
|
|
return (recv_ack(fd, DL_BIND_ACK_SIZE, "bind", bufp, ebuf));
|
|
}
|
|
|
|
static int
|
|
dlpromisconreq(int fd, bpf_u_int32 level, char *ebuf)
|
|
{
|
|
dl_promiscon_req_t req;
|
|
|
|
req.dl_primitive = DL_PROMISCON_REQ;
|
|
req.dl_level = level;
|
|
|
|
return (send_request(fd, (char *)&req, sizeof(req), "promiscon", ebuf));
|
|
}
|
|
|
|
static int
|
|
dlokack(int fd, const char *what, char *bufp, char *ebuf)
|
|
{
|
|
|
|
return (recv_ack(fd, DL_OK_ACK_SIZE, what, bufp, ebuf));
|
|
}
|
|
|
|
|
|
static int
|
|
dlinforeq(int fd, char *ebuf)
|
|
{
|
|
dl_info_req_t req;
|
|
|
|
req.dl_primitive = DL_INFO_REQ;
|
|
|
|
return (send_request(fd, (char *)&req, sizeof(req), "info", ebuf));
|
|
}
|
|
|
|
static int
|
|
dlinfoack(int fd, char *bufp, char *ebuf)
|
|
{
|
|
|
|
return (recv_ack(fd, DL_INFO_ACK_SIZE, "info", bufp, ebuf));
|
|
}
|
|
|
|
#ifdef HAVE_SYS_BUFMOD_H
|
|
static int
|
|
strioctl(int fd, int cmd, int len, char *dp)
|
|
{
|
|
struct strioctl str;
|
|
int rc;
|
|
|
|
str.ic_cmd = cmd;
|
|
str.ic_timout = -1;
|
|
str.ic_len = len;
|
|
str.ic_dp = dp;
|
|
rc = ioctl(fd, I_STR, &str);
|
|
|
|
if (rc < 0)
|
|
return (rc);
|
|
else
|
|
return (str.ic_len);
|
|
}
|
|
#endif
|
|
|
|
#if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
|
|
static char *
|
|
get_release(bpf_u_int32 *majorp, bpf_u_int32 *minorp, bpf_u_int32 *microp)
|
|
{
|
|
char *cp;
|
|
static char buf[32];
|
|
|
|
*majorp = 0;
|
|
*minorp = 0;
|
|
*microp = 0;
|
|
if (sysinfo(SI_RELEASE, buf, sizeof(buf)) < 0)
|
|
return ("?");
|
|
cp = buf;
|
|
if (!isdigit((unsigned char)*cp))
|
|
return (buf);
|
|
*majorp = strtol(cp, &cp, 10);
|
|
if (*cp++ != '.')
|
|
return (buf);
|
|
*minorp = strtol(cp, &cp, 10);
|
|
if (*cp++ != '.')
|
|
return (buf);
|
|
*microp = strtol(cp, &cp, 10);
|
|
return (buf);
|
|
}
|
|
#endif
|
|
|
|
#ifdef DL_HP_PPA_ACK_OBS
|
|
/*
|
|
* Under HP-UX 10 and HP-UX 11, we can ask for the ppa
|
|
*/
|
|
|
|
|
|
/*
|
|
* Determine ppa number that specifies ifname.
|
|
*
|
|
* If the "dl_hp_ppa_info_t" doesn't have a "dl_module_id_1" member,
|
|
* the code that's used here is the old code for HP-UX 10.x.
|
|
*
|
|
* However, HP-UX 10.20, at least, appears to have such a member
|
|
* in its "dl_hp_ppa_info_t" structure, so the new code is used.
|
|
* The new code didn't work on an old 10.20 system on which Rick
|
|
* Jones of HP tried it, but with later patches installed, it
|
|
* worked - it appears that the older system had those members but
|
|
* didn't put anything in them, so, if the search by name fails, we
|
|
* do the old search.
|
|
*
|
|
* Rick suggests that making sure your system is "up on the latest
|
|
* lancommon/DLPI/driver patches" is probably a good idea; it'd fix
|
|
* that problem, as well as allowing libpcap to see packets sent
|
|
* from the system on which the libpcap application is being run.
|
|
* (On 10.20, in addition to getting the latest patches, you need
|
|
* to turn the kernel "lanc_outbound_promisc_flag" flag on with ADB;
|
|
* a posting to "comp.sys.hp.hpux" at
|
|
*
|
|
* http://www.deja.com/[ST_rn=ps]/getdoc.xp?AN=558092266
|
|
*
|
|
* says that, to see the machine's outgoing traffic, you'd need to
|
|
* apply the right patches to your system, and also set that variable
|
|
* with:
|
|
|
|
echo 'lanc_outbound_promisc_flag/W1' | /usr/bin/adb -w /stand/vmunix /dev/kmem
|
|
|
|
* which could be put in, for example, "/sbin/init.d/lan".
|
|
*
|
|
* Setting the variable is not necessary on HP-UX 11.x.
|
|
*/
|
|
static int
|
|
get_dlpi_ppa(register int fd, register const char *device, register int unit,
|
|
register char *ebuf)
|
|
{
|
|
register dl_hp_ppa_ack_t *ap;
|
|
register dl_hp_ppa_info_t *ipstart, *ip;
|
|
register int i;
|
|
char dname[100];
|
|
register u_long majdev;
|
|
struct stat statbuf;
|
|
dl_hp_ppa_req_t req;
|
|
char buf[MAXDLBUF];
|
|
char *ppa_data_buf;
|
|
dl_hp_ppa_ack_t *dlp;
|
|
struct strbuf ctl;
|
|
int flags;
|
|
int ppa;
|
|
|
|
memset((char *)&req, 0, sizeof(req));
|
|
req.dl_primitive = DL_HP_PPA_REQ;
|
|
|
|
memset((char *)buf, 0, sizeof(buf));
|
|
if (send_request(fd, (char *)&req, sizeof(req), "hpppa", ebuf) < 0)
|
|
return (-1);
|
|
|
|
ctl.maxlen = DL_HP_PPA_ACK_SIZE;
|
|
ctl.len = 0;
|
|
ctl.buf = (char *)buf;
|
|
|
|
flags = 0;
|
|
/*
|
|
* DLPI may return a big chunk of data for a DL_HP_PPA_REQ. The normal
|
|
* recv_ack will fail because it set the maxlen to MAXDLBUF (8192)
|
|
* which is NOT big enough for a DL_HP_PPA_REQ.
|
|
*
|
|
* This causes libpcap applications to fail on a system with HP-APA
|
|
* installed.
|
|
*
|
|
* To figure out how big the returned data is, we first call getmsg
|
|
* to get the small head and peek at the head to get the actual data
|
|
* length, and then issue another getmsg to get the actual PPA data.
|
|
*/
|
|
/* get the head first */
|
|
if (getmsg(fd, &ctl, (struct strbuf *)NULL, &flags) < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"get_dlpi_ppa: hpppa getmsg: %s", pcap_strerror(errno));
|
|
return (-1);
|
|
}
|
|
|
|
dlp = (dl_hp_ppa_ack_t *)ctl.buf;
|
|
if (dlp->dl_primitive != DL_HP_PPA_ACK) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"get_dlpi_ppa: hpppa unexpected primitive ack 0x%x",
|
|
(bpf_u_int32)dlp->dl_primitive);
|
|
return (-1);
|
|
}
|
|
|
|
if (ctl.len < DL_HP_PPA_ACK_SIZE) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"get_dlpi_ppa: hpppa ack too small (%d < %d)",
|
|
ctl.len, DL_HP_PPA_ACK_SIZE);
|
|
return (-1);
|
|
}
|
|
|
|
/* allocate buffer */
|
|
if ((ppa_data_buf = (char *)malloc(dlp->dl_length)) == NULL) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"get_dlpi_ppa: hpppa malloc: %s", pcap_strerror(errno));
|
|
return (-1);
|
|
}
|
|
ctl.maxlen = dlp->dl_length;
|
|
ctl.len = 0;
|
|
ctl.buf = (char *)ppa_data_buf;
|
|
/* get the data */
|
|
if (getmsg(fd, &ctl, (struct strbuf *)NULL, &flags) < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"get_dlpi_ppa: hpppa getmsg: %s", pcap_strerror(errno));
|
|
free(ppa_data_buf);
|
|
return (-1);
|
|
}
|
|
if (ctl.len < dlp->dl_length) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"get_dlpi_ppa: hpppa ack too small (%d < %d)",
|
|
ctl.len, dlp->dl_length);
|
|
free(ppa_data_buf);
|
|
return (-1);
|
|
}
|
|
|
|
ap = (dl_hp_ppa_ack_t *)buf;
|
|
ipstart = (dl_hp_ppa_info_t *)ppa_data_buf;
|
|
ip = ipstart;
|
|
|
|
#ifdef HAVE_HP_PPA_INFO_T_DL_MODULE_ID_1
|
|
/*
|
|
* The "dl_hp_ppa_info_t" structure has a "dl_module_id_1"
|
|
* member that should, in theory, contain the part of the
|
|
* name for the device that comes before the unit number,
|
|
* and should also have a "dl_module_id_2" member that may
|
|
* contain an alternate name (e.g., I think Ethernet devices
|
|
* have both "lan", for "lanN", and "snap", for "snapN", with
|
|
* the former being for Ethernet packets and the latter being
|
|
* for 802.3/802.2 packets).
|
|
*
|
|
* Search for the device that has the specified name and
|
|
* instance number.
|
|
*/
|
|
for (i = 0; i < ap->dl_count; i++) {
|
|
if ((strcmp((const char *)ip->dl_module_id_1, device) == 0 ||
|
|
strcmp((const char *)ip->dl_module_id_2, device) == 0) &&
|
|
ip->dl_instance_num == unit)
|
|
break;
|
|
|
|
ip = (dl_hp_ppa_info_t *)((u_char *)ipstart + ip->dl_next_offset);
|
|
}
|
|
#else
|
|
/*
|
|
* We don't have that member, so the search is impossible; make it
|
|
* look as if the search failed.
|
|
*/
|
|
i = ap->dl_count;
|
|
#endif
|
|
|
|
if (i == ap->dl_count) {
|
|
/*
|
|
* Well, we didn't, or can't, find the device by name.
|
|
*
|
|
* HP-UX 10.20, whilst it has "dl_module_id_1" and
|
|
* "dl_module_id_2" fields in the "dl_hp_ppa_info_t",
|
|
* doesn't seem to fill them in unless the system is
|
|
* at a reasonably up-to-date patch level.
|
|
*
|
|
* Older HP-UX 10.x systems might not have those fields
|
|
* at all.
|
|
*
|
|
* Therefore, we'll search for the entry with the major
|
|
* device number of a device with the name "/dev/<dev><unit>",
|
|
* if such a device exists, as the old code did.
|
|
*/
|
|
snprintf(dname, sizeof(dname), "/dev/%s%d", device, unit);
|
|
if (stat(dname, &statbuf) < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "stat: %s: %s",
|
|
dname, pcap_strerror(errno));
|
|
return (-1);
|
|
}
|
|
majdev = major(statbuf.st_rdev);
|
|
|
|
ip = ipstart;
|
|
|
|
for (i = 0; i < ap->dl_count; i++) {
|
|
if (ip->dl_mjr_num == majdev &&
|
|
ip->dl_instance_num == unit)
|
|
break;
|
|
|
|
ip = (dl_hp_ppa_info_t *)((u_char *)ipstart + ip->dl_next_offset);
|
|
}
|
|
}
|
|
if (i == ap->dl_count) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"can't find /dev/dlpi PPA for %s%d", device, unit);
|
|
return (-1);
|
|
}
|
|
if (ip->dl_hdw_state == HDW_DEAD) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"%s%d: hardware state: DOWN\n", device, unit);
|
|
free(ppa_data_buf);
|
|
return (-1);
|
|
}
|
|
ppa = ip->dl_ppa;
|
|
free(ppa_data_buf);
|
|
return (ppa);
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_HPUX9
|
|
/*
|
|
* Under HP-UX 9, there is no good way to determine the ppa.
|
|
* So punt and read it from /dev/kmem.
|
|
*/
|
|
static struct nlist nl[] = {
|
|
#define NL_IFNET 0
|
|
{ "ifnet" },
|
|
{ "" }
|
|
};
|
|
|
|
static char path_vmunix[] = "/hp-ux";
|
|
|
|
/* Determine ppa number that specifies ifname */
|
|
static int
|
|
get_dlpi_ppa(register int fd, register const char *ifname, register int unit,
|
|
register char *ebuf)
|
|
{
|
|
register const char *cp;
|
|
register int kd;
|
|
void *addr;
|
|
struct ifnet ifnet;
|
|
char if_name[sizeof(ifnet.if_name) + 1];
|
|
|
|
cp = strrchr(ifname, '/');
|
|
if (cp != NULL)
|
|
ifname = cp + 1;
|
|
if (nlist(path_vmunix, &nl) < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "nlist %s failed",
|
|
path_vmunix);
|
|
return (-1);
|
|
}
|
|
if (nl[NL_IFNET].n_value == 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
|
"could't find %s kernel symbol",
|
|
nl[NL_IFNET].n_name);
|
|
return (-1);
|
|
}
|
|
kd = open("/dev/kmem", O_RDONLY);
|
|
if (kd < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "kmem open: %s",
|
|
pcap_strerror(errno));
|
|
return (-1);
|
|
}
|
|
if (dlpi_kread(kd, nl[NL_IFNET].n_value,
|
|
&addr, sizeof(addr), ebuf) < 0) {
|
|
close(kd);
|
|
return (-1);
|
|
}
|
|
for (; addr != NULL; addr = ifnet.if_next) {
|
|
if (dlpi_kread(kd, (off_t)addr,
|
|
&ifnet, sizeof(ifnet), ebuf) < 0 ||
|
|
dlpi_kread(kd, (off_t)ifnet.if_name,
|
|
if_name, sizeof(ifnet.if_name), ebuf) < 0) {
|
|
(void)close(kd);
|
|
return (-1);
|
|
}
|
|
if_name[sizeof(ifnet.if_name)] = '\0';
|
|
if (strcmp(if_name, ifname) == 0 && ifnet.if_unit == unit)
|
|
return (ifnet.if_index);
|
|
}
|
|
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "Can't find %s", ifname);
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
dlpi_kread(register int fd, register off_t addr,
|
|
register void *buf, register u_int len, register char *ebuf)
|
|
{
|
|
register int cc;
|
|
|
|
if (lseek(fd, addr, SEEK_SET) < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "lseek: %s",
|
|
pcap_strerror(errno));
|
|
return (-1);
|
|
}
|
|
cc = read(fd, buf, len);
|
|
if (cc < 0) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "read: %s",
|
|
pcap_strerror(errno));
|
|
return (-1);
|
|
} else if (cc != len) {
|
|
snprintf(ebuf, PCAP_ERRBUF_SIZE, "short read (%d != %d)", cc,
|
|
len);
|
|
return (-1);
|
|
}
|
|
return (cc);
|
|
}
|
|
#endif
|