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- /*
- * 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.
- *
- * This code contributed by Atanu Ghosh (atanu@cs.ucl.ac.uk),
- * University College London.
- */
- #ifndef lint
- static char rcsid[] =
- "@(#)$Header: pcap-dlpi.c,v 1.22x 94/10/12 20:08:15 leres Exp $ (LBL)";
- #endif
-
- /*
- * Packet capture routine for dlpi under SunOS 5
- *
- * Notes:
- *
- * - Apparently the DLIOCRAW ioctl() is specific to SunOS.
- *
- * - There is a bug in bufmod(7) such that setting the snapshot
- * length results in data being left of the front of the packet.
- *
- * - It might be desirable to use pfmod(7) to filter packets in the
- * kernel.
- */
-
- #include <sys/types.h>
- #include <sys/time.h>
- #include <sys/bufmod.h>
- #include <sys/dlpi.h>
- #include <sys/stream.h>
- #include <sys/systeminfo.h>
-
- #include <net/bpf.h>
-
- #include <ctype.h>
- #include <errno.h>
- #include <fcntl.h>
- #include <memory.h>
- #include <signal.h>
- #include <stdio.h>
- #if __STDC__
- #include <stdlib.h>
- #endif
- #include <string.h>
- #include <stropts.h>
- #include <unistd.h>
-
- #include "pcap-int.h"
-
- #define MAXDLBUF 8192
-
- /* Forwards */
- static int send_request(int, char *, int, char *, char *);
- static int dlattachreq(int, u_long, char *);
- static int dlinfoack(int, char *, char *);
- static int dlinforeq(int, char *);
- static int dlpromisconreq(int, u_long, char *);
- static int dlokack(int, char *, char *);
- static int strioctl(int, int, int, char *);
- #ifdef SOLARIS
- static char *getrelease(long *, long *, long *);
- #endif
-
- int
- pcap_stats_live(pcap_t *p, struct pcap_stat *ps)
- {
- *ps = p->md.stat;
- return (0);
- }
-
- int
- pcap_read_live(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
- {
- register int cc, n;
- register u_char *bp, *ep, *pk;
- register struct bpf_insn *fcode;
- register struct sb_hdr *sbp;
- int flags;
- struct strbuf data;
- struct pcap_hdr hdr;
-
- flags = 0;
- cc = p->cc;
- if (cc == 0) {
- data.buf = (char *)p->buffer;
- data.maxlen = MAXDLBUF;
- data.len = 0;
- do {
- if (getmsg(p->fd, NULL, &data, &flags) < 0) {
- /* Don't choke when we get ptraced */
- if (errno == EINTR) {
- cc = 0;
- continue;
- }
- strcpy(p->errbuf, pcap_strerror(errno));
- return (-1);
- }
- cc = data.len;
- } while (cc == 0);
- bp = p->buffer;
- } else
- bp = p->bp;
-
- /* Loop through packets */
- fcode = p->fcode.bf_insns;
- ep = bp + cc;
- n = 0;
- while (bp < ep) {
- sbp = (struct sb_hdr *)bp;
- p->md.stat.ps_drop += sbp->sbh_drops;
- ++p->md.stat.ps_recv;
- pk = bp + sizeof(*sbp);
- bp += sbp->sbh_totlen;
- if (fcode == NULL ||
- bpf_filter(fcode, pk, sbp->sbh_origlen, sbp->sbh_msglen)) {
- hdr.ts = sbp->sbh_timestamp;
- hdr.len = sbp->sbh_origlen;
- hdr.caplen = sbp->sbh_msglen;
- hdr.drops = p->md.stat.ps_drop;
- (*callback)(user, &hdr, pk);
- if (++n >= cnt && cnt >= 0) {
- p->cc = ep - bp;
- p->bp = bp;
- return (n);
- }
- }
- }
- p->cc = 0;
- return (n);
- }
-
- pcap_t *
- pcap_open_live(char *device, int snaplen, int promisc, int to_ms, char *ebuf)
- {
- register pcap_t *p;
- long buf[MAXDLBUF];
- int ppa;
- int cppa;
- register dl_info_ack_t *infop;
- u_long ss, flag;
- #ifdef SOLARIS
- char *release;
- long osmajor, osminor, osmicro;
- #endif
- char dname[100];
-
- p = (pcap_t *)malloc(sizeof(*p));
- if (p == NULL) {
- strcpy(ebuf, pcap_strerror(errno));
- return (NULL);
- }
- memset(p, 0, sizeof(*p));
-
- /*
- ** 1) In order to get the ppa take the last character of the device
- ** name if it is a number then fail the open.
- **
- ** 2) If the name starts with a '/' then this is an absolute pathname,
- ** otherwise prepend '/dev/'.
- **
- ** 3) Remove the trailing digit and try and open the device
- ** not staggeringly intuitive but it should work.
- **
- ** If there are more than 9 devices this code will fail.
- */
-
- cppa = device[strlen(device) - 1];
- if (!isdigit(cppa)) {
- sprintf(ebuf, "%c is not a digit, therefore not a valid ppa",
- cppa);
- goto bad;
- }
-
- dname[0] = '\0';
- if (device[0] != '/')
- strcpy(dname, "/dev/");
-
- strcat(dname, device);
- dname[strlen(dname) - 1] = '\0';
-
- if ((p->fd = open(dname, O_RDWR)) < 0) {
- sprintf(ebuf, "%s: %s", dname, pcap_strerror(errno));
- goto bad;
- }
- p->snapshot = snaplen;
-
- ppa = cppa - '0';
- /*
- ** Attach.
- */
- if (dlattachreq(p->fd, ppa, ebuf) < 0 ||
- dlokack(p->fd, (char *)buf, ebuf) < 0)
- goto bad;
-
- if (promisc) {
- /*
- ** enable promiscuous.
- */
- if (dlpromisconreq(p->fd, DL_PROMISC_PHYS, ebuf) < 0 ||
- dlokack(p->fd, (char *)buf, ebuf) < 0)
- goto bad;
- if (dlpromisconreq(p->fd, DL_PROMISC_SAP, ebuf) < 0 ||
- dlokack(p->fd, (char *)buf, ebuf) < 0)
- goto bad;
-
- /*
- ** enable multicast, you would have thought promiscuous
- ** would be sufficient.
- */
- if (dlpromisconreq(p->fd, DL_PROMISC_MULTI, ebuf) < 0 ||
- dlokack(p->fd, (char *)buf, ebuf) < 0)
- goto bad;
- }
-
- /*
- ** 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_ETHER:
- p->linktype = DLT_EN10MB;
- break;
-
- case DL_FDDI:
- p->linktype = DLT_FDDI;
- break;
-
- default:
- sprintf(ebuf, "unknown mac type 0x%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) {
- sprintf(ebuf, "DLIOCRAW: %s", pcap_strerror(errno));
- goto bad;
- }
- #endif
-
- /*
- ** Another non standard call to get the data nicely buffered
- */
- if (ioctl(p->fd, I_PUSH, "bufmod") != 0) {
- sprintf(ebuf, "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 SOLARIS
- release = getrelease(&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(u_long), (char *)&ss) != 0) {
- sprintf(ebuf, "SBIOCSSNAP: %s", pcap_strerror(errno));
- goto bad;
- }
-
- /*
- ** Set up the bufmod flags
- */
- if (strioctl(p->fd, SBIOCGFLAGS, sizeof(u_long), (char *)&flag) < 0) {
- sprintf(ebuf, "SBIOCGFLAGS: %s", pcap_strerror(errno));
- goto bad;
- }
- flag |= SB_NO_DROPS;
- if (strioctl(p->fd, SBIOCSFLAGS, sizeof(u_long), (char *)&flag) != 0) {
- sprintf(ebuf, "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) {
- sprintf(ebuf, "SBIOCSTIME: %s", pcap_strerror(errno));
- goto bad;
- }
- }
-
- /*
- ** As the last operation flush the read side.
- */
- if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
- sprintf(ebuf, "FLUSHR: %s", pcap_strerror(errno));
- goto bad;
- }
- /* Allocate data buffer */
- p->bufsize = MAXDLBUF * sizeof(long);
- p->buffer = (u_char *)malloc(p->bufsize);
- return (p);
- bad:
- free(p);
- return (NULL);
- }
-
- int
- pcap_setfilter_live(pcap_t *p, struct bpf_program *fp)
- {
- p->fcode = *fp;
- 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) {
- sprintf(ebuf, "putmsg \"%s\"failed: %s",
- what, pcap_strerror(errno));
- return (-1);
- }
- return (0);
- }
-
- static int
- dlattachreq(int fd, u_long 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
- dlpromisconreq(int fd, u_long 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, 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) {
- sprintf(ebuf, "getmsg: %s", pcap_strerror(errno));
- return (-1);
- }
-
- dlp = (union DL_primitives *) ctl.buf;
-
- if (dlp->dl_primitive != DL_OK_ACK) {
- sprintf(ebuf, "dlokack unexpected primitive %d",
- dlp->dl_primitive);
- return (-1);
- }
-
- if (ctl.len != sizeof(dl_ok_ack_t)) {
- sprintf(ebuf, "dlokack incorrect size returned");
- return (-1);
- }
- return (0);
- }
-
-
- 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)
- {
- 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) {
- sprintf(ebuf, "dlinfoack: getmsg: %s", pcap_strerror(errno));
- return (-1);
- }
-
- dlp = (union DL_primitives *) ctl.buf;
-
- if (dlp->dl_primitive != DL_INFO_ACK) {
- sprintf(ebuf, "dlinfoack: unexpected primitive %ld",
- dlp->dl_primitive);
- return (-1);
- }
-
- /* Extra stuff like the broadcast address can be returned */
- if (ctl.len < DL_INFO_ACK_SIZE) {
- sprintf(ebuf, "dlinfoack: incorrect size returned");
- return (-1);
- }
- return (0);
- }
-
- 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);
- }
-
- #ifdef SOLARIS
- static char *
- getrelease(long *majorp, long *minorp, long *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(*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
-