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<hr><p align="left"><small>:pcap_dlpi.c <br>
---------------------------------------------------------------------------- <br>
---- <br>
: scz 于 2001-2-5 21:10:58 加贴在 绿盟科技论坛(bbs.nsfocus.com)--UNIX系统安全 <br>
： <br>
/* <br>
* Copyright (c) 1993, 1994 <br>
* The Regents of the University of California. All rights reserved. <br>
* <br>
* Redistribution and use in source and binary forms, with or without <br>
* modification, are permitted provided that: (1) source code distributions <br>
* retain the above copyright notice and this paragraph in its entirety, (2) <br>
* distributions including binary code include the above copyright notice and <br>
<br>
* this paragraph in its entirety in the documentation or other materials <br>
* provided with the distribution, and (3) all advertising materials mentioni <br>
ng <br>
* features or use of this software display the following acknowledgement: <br>
* ``This product includes software developed by the University of California <br>
, <br>
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of <br>
* the University nor the names of its contributors may be used to endorse <br>
* or promote products derived from this software without specific prior <br>
* written permission. <br>
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED <br>
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF <br>
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. <br>
* <br>
* This code contributed by Atanu Ghosh (atanu@cs.ucl.ac.uk), <br>
* University College London. <br>
*/ <br>
#ifndef lint <br>
static char rcsid[] = <br>
"@(#)$Header: pcap-dlpi.c,v 1.18 94/06/20 19:07:56 leres Exp $ (LBL)"; <br>
#endif <br>
/* <br>
* Packet capture routine for dlpi under SunOS 5 <br>
* <br>
* Notes: <br>
* <br>
* - Apparently the DLIOCRAW ioctl() is specific to SunOS. <br>
* <br>
* - There is a bug in bufmod(7) such that setting the snapshot <br>
* length results in data being left of the front of the packet. <br>
* <br>
* <br>
* - It might be desirable to use pfmod(7) to filter packets in the <br>
* kernel. <br>
*/ <br>
#include <sys/types.h> <br>
#include <sys/time.h> <br>
#include <sys/bufmod.h> <br>
#include <sys/dlpi.h> <br>
#include <sys/signal.h> <br>
#include <sys/stream.h> <br>
#include <sys/systeminfo.h> <br>
#include <net/bpf.h> <br>
#include <ctype.h> <br>
#include <errno.h> <br>
#include <fcntl.h> <br>
#include <memory.h> <br>
#include <stdio.h> <br>
#include <stdlib.h> <br>
#include <string.h> <br>
#include <stropts.h> <br>
#include <unistd.h> <br>
#include "pcap-int.h" <br>
#define MAXDLBUF 8192 <br>
/* Forwards */ <br>
static int send_request(int, char *, int, char *, char *); <br>
static int dlattachreq(int, u_long, char *); <br>
static int dlpromisconreq(int, u_long, char *); <br>
static int dlokack(int, char *, char *); <br>
static int strioctl(int, int, int, char *); <br>
#ifdef SOLARIS <br>
static char *getrelease(long *, long *, long *); <br>
#endif <br>
static void dlbindreq(int, u_long, u_long, u_long, u_long, u_long); <br>
static int dlbindack(int, char *); <br>
int <br>
pcap_stats(pcap_t *p, struct pcap_stat *ps) <br>
{ <br>
*ps = p->md.stat; <br>
return (0); <br>
} <br>
int <br>
pcap_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) <br>
{ <br>
register int cc, n; <br>
register u_char *bp, *ep, *pk; <br>
register struct bpf_insn *fcode; <br>
register struct sb_hdr *sbp; <br>
int flags; <br>
struct strbuf data; <br>
struct pcap_pkthdr pkthdr; <br>
flags = 0; <br>
cc = p->cc; <br>
if (cc == 0) { <br>
data.buf = (char *)p->buffer; <br>
data.maxlen = MAXDLBUF; <br>
data.len = 0; <br>
do { <br>
if (getmsg(p->fd, NULL, &data, &flags) < 0) { <br>
/* Don't choke when we get ptraced */ <br>
if (errno == EINTR) { <br>
cc = 0; <br>
continue; <br>
} <br>
strcpy(p->errbuf, pcap_strerror(errno)); <br>
return (-1); <br>
} <br>
cc = data.len; <br>
} while (cc == 0); <br>
bp = p->buffer; <br>
} else <br>
bp = p->bp; <br>
/* Loop through packets */ <br>
fcode = p->fcode.bf_insns; <br>
ep = bp + cc; <br>
n = 0; <br>
while (bp < ep) { <br>
sbp = (struct sb_hdr *)bp; <br>
p->md.stat.ps_drop += sbp->sbh_drops; <br>
++p->md.stat.ps_recv; <br>
pk = bp + sizeof(*sbp); <br>
bp += sbp->sbh_totlen; <br>
if (bpf_filter(fcode, pk, sbp->sbh_origlen, sbp->sbh_msglen)) { <br>
pkthdr.ts = sbp->sbh_timestamp; <br>
pkthdr.len = sbp->sbh_origlen; <br>
pkthdr.caplen = sbp->sbh_msglen; <br>
(*callback)(user, &pkthdr, pk); <br>
if (++n >= cnt && cnt >= 0) { <br>
p->cc = ep - bp; <br>
p->bp = bp; <br>
return (n); <br>
} <br>
} <br>
} <br>
p->cc = 0; <br>
return (n); <br>
} <br>
/* XXX to_ms isn't implemented? */ <br>
pcap_t * <br>
pcap_open_live(char *device, int snaplen, int promisc, int to_ms, char *ebuf <br>
) <br>
{ <br>
register pcap_t *p; <br>
long buf[MAXDLBUF]; <br>
int ppa; <br>
int cppa; <br>
u_long ss, flag; <br>
#ifdef SOLARIS <br>
char *release; <br>
long osmajor, osminor, osmicro; <br>
#endif <br>
char dname[100]; <br>
/*nfswatch */ <br>
struct strioctl si; <br>
struct timeval timeout; <br>
u_int chunksz; <br>
p = (pcap_t *)malloc(sizeof(*p)); <br>
if (p == NULL) { <br>
strcpy(ebuf, pcap_strerror(errno)); <br>
return (NULL); <br>
} <br>
memset(p, 0, sizeof(*p)); <br>
/* <br>
** 1) In order to get the ppa take the last character of the device <br>
** name if it is a number then fail the open. <br>
** <br>
** 2) If the name starts with a '/' then this is an absolute pathname, <br>
** otherwise prepend '/dev/'. <br>
** <br>
** 3) Remove the trailing digit and try and open the device <br>
** not staggeringly intuitive but it should work. <br>
** <br>
** If there are more than 9 devices this code will fail. <br>
*/ <br>
*/ <br>
cppa = device[strlen(device) - 1]; <br>
if (!isdigit(cppa)) { <br>
sprintf(ebuf, "%c is not a digit, therefore not a valid ppa", <br>
cppa); <br>
goto bad; <br>
} <br>
dname[0] = '\0'; <br>
if (device[0] != '/') <br>
strcpy(dname, "/dev/"); <br>
strcat(dname, device); <br>
dname[strlen(dname) - 1] = '\0'; <br>
if ((p->fd = open(dname, O_RDWR)) < 0) { <br>
sprintf(ebuf, "%s: %s", dname, pcap_strerror(errno)); <br>
goto bad; <br>
} <br>
p->snapshot = snaplen; <br>
ppa = cppa - '0'; <br>
/* <br>
** Attach. <br>
*/ <br>
if (dlattachreq(p->fd, ppa, ebuf) < 0 || <br>
dlokack(p->fd, (char *)buf, ebuf) < 0) <br>
goto bad; <br>
/* <br>
* Bind to the specific unit. nfswatch <br>
*/ <br>
#define DLPI_DEFAULTSAP 0x0800 /* IP protocol */ <br>
dlbindreq(p->fd, DLPI_DEFAULTSAP, 0, DL_CLDLS, 0, 0); <br>
if (dlbindack(p->fd, (char *)buf) < 0) { <br>
sprintf(ebuf, "dlbindack failed.\n"); <br>
goto bad; <br>
} <br>
if (promisc) { <br>
/* <br>
** enable promiscuous. <br>
*/ <br>
if (dlpromisconreq(p->fd, DL_PROMISC_PHYS, ebuf) < 0 || <br>
dlokack(p->fd, (char *)buf, ebuf) < 0) <br>
goto bad; <br>
if (dlpromisconreq(p->fd, DL_PROMISC_SAP, ebuf) < 0 || <br>
dlokack(p->fd, (char *)buf, ebuf) < 0) <br>
goto bad; <br>
/* <br>
** enable multicast, you would have thought promiscuous <br>
** would be sufficient. <br>
*/ <br>
if (dlpromisconreq(p->fd, DL_PROMISC_MULTI, ebuf) < 0 || <br>
dlokack(p->fd, (char *)buf, ebuf) < 0) <br>
goto bad; <br>
} <br>
#ifdef DLIOCRAW <br>
/* <br>
** This is a non standard SunOS hack to get the ethernet header. <br>
*/ <br>
if (strioctl(p->fd, DLIOCRAW, 0, NULL) < 0) { <br>
sprintf(ebuf, "DLIOCRAW: %s", pcap_strerror(errno)); <br>
goto bad; <br>
} <br>
#endif <br>
/* <br>
** Another non standard call to get the data nicely buffered <br>
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