diff options
Diffstat (limited to 'package/etrax-tools/src/e100boot/libpcap-0.4/pcap-dlpi.c')
| -rw-r--r-- | package/etrax-tools/src/e100boot/libpcap-0.4/pcap-dlpi.c | 848 |
1 files changed, 848 insertions, 0 deletions
diff --git a/package/etrax-tools/src/e100boot/libpcap-0.4/pcap-dlpi.c b/package/etrax-tools/src/e100boot/libpcap-0.4/pcap-dlpi.c new file mode 100644 index 000000000..11d19d866 --- /dev/null +++ b/package/etrax-tools/src/e100boot/libpcap-0.4/pcap-dlpi.c @@ -0,0 +1,848 @@ +/* + * Copyright (c) 1993, 1994, 1995, 1996, 1997 + * 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. + */ + +/* + * 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. + */ + +#ifndef lint +static const char rcsid[] = + "@(#) $Header: /usr/local/cvs/linux/tools/build/e100boot/libpcap-0.4/pcap-dlpi.c,v 1.1 1999/08/26 10:05:23 johana Exp $ (LBL)"; +#endif + +#include <sys/types.h> +#include <sys/time.h> +#ifdef HAVE_SYS_BUFMOD_H +#include <sys/bufmod.h> +#endif +#include <sys/dlpi.h> +#ifdef HAVE_SYS_DLPI_EXT_H +#include <sys/dlpi_ext.h> +#endif +#ifdef HAVE_HPUX9 +#include <sys/socket.h> +#endif +#ifdef DL_HP_PPA_ACK_OBS +#include <sys/stat.h> +#endif +#include <sys/stream.h> +#if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H) +#include <sys/systeminfo.h> +#endif + +#ifdef HAVE_HPUX9 +#include <net/if.h> +#endif + +#include <ctype.h> +#ifdef HAVE_HPUX9 +#include <nlist.h> +#endif +#include <errno.h> +#include <fcntl.h> +#include <memory.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stropts.h> +#include <unistd.h> + +#include "pcap-int.h" + +#include "gnuc.h" +#ifdef HAVE_OS_PROTO_H +#include "os-proto.h" +#endif + +#ifndef PCAP_DEV_PREFIX +#define PCAP_DEV_PREFIX "/dev" +#endif + +#define MAXDLBUF 8192 + +/* Forwards */ +static int dlattachreq(int, bpf_u_int32, char *); +static int dlbindack(int, char *, char *); +static int dlbindreq(int, bpf_u_int32, char *); +static int dlinfoack(int, char *, char *); +static int dlinforeq(int, char *); +static int dlokack(int, const char *, char *, char *); +static int recv_ack(int, int, const char *, char *, char *); +static int dlpromisconreq(int, bpf_u_int32, char *); +#if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H) +static char *get_release(bpf_u_int32 *, bpf_u_int32 *, bpf_u_int32 *); +#endif +static int send_request(int, char *, int, char *, char *); +#ifdef HAVE_SYS_BUFMOD_H +static int strioctl(int, int, int, char *); +#endif +#ifdef HAVE_HPUX9 +static int dlpi_kread(int, off_t, void *, u_int, char *); +#endif +#ifdef HAVE_DEV_DLPI +static int get_dlpi_ppa(int, const char *, int, char *); +#endif + +int +pcap_stats(pcap_t *p, struct pcap_stat *ps) +{ + + *ps = p->md.stat; + return (0); +} + +/* XXX Needed by HP-UX (at least) */ +static bpf_u_int32 ctlbuf[MAXDLBUF]; +static struct strbuf ctl = { + MAXDLBUF, + 0, + (char *)ctlbuf +}; + +int +pcap_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) +{ + register int cc, n, caplen, origlen; + register u_char *bp, *ep, *pk; + register struct bpf_insn *fcode; +#ifdef HAVE_SYS_BUFMOD_H + register struct sb_hdr *sbp; +#ifdef LBL_ALIGN + struct sb_hdr sbhdr; +#endif +#endif + int flags; + struct strbuf data; + struct pcap_pkthdr pkthdr; + + flags = 0; + cc = p->cc; + if (cc == 0) { + data.buf = (char *)p->buffer + p->offset; + data.maxlen = MAXDLBUF; + data.len = 0; + do { + if (getmsg(p->fd, &ctl, &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 + p->offset; + } else + bp = p->bp; + + /* Loop through packets */ + fcode = p->fcode.bf_insns; + ep = bp + cc; + n = 0; +#ifdef HAVE_SYS_BUFMOD_H + while (bp < ep) { +#ifdef LBL_ALIGN + if ((long)bp & 3) { + sbp = &sbhdr; + memcpy(sbp, bp, sizeof(*sbp)); + } else +#endif + sbp = (struct sb_hdr *)bp; + p->md.stat.ps_drop += sbp->sbh_drops; + pk = bp + sizeof(*sbp); + bp += sbp->sbh_totlen; + origlen = sbp->sbh_origlen; + caplen = sbp->sbh_msglen; +#else + origlen = cc; + caplen = min(p->snapshot, cc); + pk = bp; + bp += caplen; +#endif + ++p->md.stat.ps_recv; + if (bpf_filter(fcode, pk, origlen, caplen)) { +#ifdef HAVE_SYS_BUFMOD_H + pkthdr.ts = sbp->sbh_timestamp; +#else + (void)gettimeofday(&pkthdr.ts, NULL); +#endif + pkthdr.len = origlen; + pkthdr.caplen = caplen; + /* Insure caplen does not exceed snapshot */ + if (pkthdr.caplen > p->snapshot) + pkthdr.caplen = p->snapshot; + (*callback)(user, &pkthdr, pk); + if (++n >= cnt && cnt >= 0) { + p->cc = ep - bp; + p->bp = bp; + return (n); + } + } +#ifdef HAVE_SYS_BUFMOD_H + } +#endif + p->cc = 0; + return (n); +} + +pcap_t * +pcap_open_live(char *device, int snaplen, int promisc, int to_ms, char *ebuf) +{ + register char *cp; + char *eos; + register pcap_t *p; + register int ppa; + register dl_info_ack_t *infop; +#ifdef HAVE_SYS_BUFMOD_H + bpf_u_int32 ss, flag; +#ifdef HAVE_SOLARIS + register char *release; + bpf_u_int32 osmajor, osminor, osmicro; +#endif +#endif + bpf_u_int32 buf[MAXDLBUF]; + char dname[100]; +#ifndef HAVE_DEV_DLPI + char dname2[100]; +#endif + + p = (pcap_t *)malloc(sizeof(*p)); + if (p == NULL) { + strcpy(ebuf, pcap_strerror(errno)); + return (NULL); + } + memset(p, 0, sizeof(*p)); + + /* + ** Determine device and ppa + */ + cp = strpbrk(device, "0123456789"); + if (cp == NULL) { + sprintf(ebuf, "%s missing unit number", device); + goto bad; + } + ppa = strtol(cp, &eos, 10); + if (*eos != '\0') { + sprintf(ebuf, "%s bad unit number", device); + goto bad; + } + + if (*device == '/') + strcpy(dname, device); + else + sprintf(dname, "%s/%s", PCAP_DEV_PREFIX, device); +#ifdef HAVE_DEV_DLPI + /* Map network device to /dev/dlpi unit */ + cp = "/dev/dlpi"; + if ((p->fd = open(cp, O_RDWR)) < 0) { + sprintf(ebuf, "%s: %s", cp, pcap_strerror(errno)); + goto bad; + } + /* Map network interface to /dev/dlpi unit */ + ppa = get_dlpi_ppa(p->fd, dname, ppa, ebuf); + if (ppa < 0) + goto bad; +#else + /* Try device without unit number */ + strcpy(dname2, dname); + cp = strchr(dname, *cp); + *cp = '\0'; + if ((p->fd = open(dname, O_RDWR)) < 0) { + if (errno != ENOENT) { + sprintf(ebuf, "%s: %s", dname, pcap_strerror(errno)); + goto bad; + } + + /* Try again with unit number */ + if ((p->fd = open(dname2, O_RDWR)) < 0) { + sprintf(ebuf, "%s: %s", dname2, pcap_strerror(errno)); + goto bad; + } + /* XXX Assume unit zero */ + ppa = 0; + } +#endif + + p->snapshot = snaplen; + + /* + ** Attach if "style 2" provider + */ + if (dlinforeq(p->fd, ebuf) < 0 || + dlinfoack(p->fd, (char *)buf, ebuf) < 0) + goto bad; + infop = &((union DL_primitives *)buf)->info_ack; + if (infop->dl_provider_style == DL_STYLE2 && + (dlattachreq(p->fd, ppa, ebuf) < 0 || + dlokack(p->fd, "attach", (char *)buf, ebuf) < 0)) + 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) + if (dlbindreq(p->fd, 0, ebuf) < 0 || + 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; + + 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 + +#ifdef HAVE_SYS_BUFMOD_H + /* + ** 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 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) { + sprintf(ebuf, "SBIOCSSNAP: %s", pcap_strerror(errno)); + goto bad; + } + + /* + ** Set up the bufmod flags + */ + if (strioctl(p->fd, SBIOCGFLAGS, sizeof(flag), (char *)&flag) < 0) { + sprintf(ebuf, "SBIOCGFLAGS: %s", pcap_strerror(errno)); + goto bad; + } + flag |= SB_NO_DROPS; + if (strioctl(p->fd, SBIOCSFLAGS, sizeof(flag), (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; + } + } +#endif + + /* + ** 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(bpf_u_int32); + p->buffer = (u_char *)malloc(p->bufsize + p->offset); + + return (p); +bad: + free(p); + return (NULL); +} + +int +pcap_setfilter(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, "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) { + sprintf(ebuf, "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_BADPPA: + sprintf(ebuf, "recv_ack: %s bad ppa (device unit)", + what); + break; + + + case DL_SYSERR: + sprintf(ebuf, "recv_ack: %s: %s", + what, pcap_strerror(dlp->error_ack.dl_unix_errno)); + break; + + case DL_UNSUPPORTED: + sprintf(ebuf, + "recv_ack: %s: Service not supplied by provider", + what); + break; + + default: + sprintf(ebuf, "recv_ack: %s error 0x%x", + what, (bpf_u_int32)dlp->error_ack.dl_errno); + break; + } + return (-1); + + default: + sprintf(ebuf, "recv_ack: %s unexpected primitive ack 0x%x ", + what, (bpf_u_int32)dlp->dl_primitive); + return (-1); + } + + if (ctl.len < size) { + sprintf(ebuf, "recv_ack: %s ack too small (%d < %d)", + what, ctl.len, size); + return (-1); + } + return (ctl.len); +} + +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(*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, we can ask for the ppa + */ + + +/* Determine ppa number that specifies ifname */ +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 *ip; + register int i; + register u_long majdev; + dl_hp_ppa_req_t req; + struct stat statbuf; + bpf_u_int32 buf[MAXDLBUF]; + + if (stat(device, &statbuf) < 0) { + sprintf(ebuf, "stat: %s: %s", device, pcap_strerror(errno)); + return (-1); + } + majdev = major(statbuf.st_rdev); + + 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 || + recv_ack(fd, DL_HP_PPA_ACK_SIZE, "hpppa", (char *)buf, ebuf) < 0) + return (-1); + + ap = (dl_hp_ppa_ack_t *)buf; + ip = (dl_hp_ppa_info_t *)((u_char *)ap + ap->dl_offset); + + 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 *)ip + ip->dl_next_offset); + } + if (i == ap->dl_count) { + sprintf(ebuf, "can't find PPA for %s", device); + return (-1); + } + if (ip->dl_hdw_state == HDW_DEAD) { + sprintf(ebuf, "%s: hardware state: DOWN\n", device); + return (-1); + } + return ((int)ip->dl_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)], tifname[32]; + + cp = strrchr(ifname, '/'); + if (cp != NULL) + ifname = cp + 1; + if (nlist(path_vmunix, &nl) < 0) { + sprintf(ebuf, "nlist %s failed", path_vmunix); + return (-1); + } + if (nl[NL_IFNET].n_value == 0) { + sprintf(ebuf, "could't find %s kernel symbol", + nl[NL_IFNET].n_name); + return (-1); + } + kd = open("/dev/kmem", O_RDONLY); + if (kd < 0) { + sprintf(ebuf, "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(if_name), ebuf) < 0) { + (void)close(kd); + return (-1); + } + sprintf(tifname, "%.*s%d", + (int)sizeof(if_name), if_name, ifnet.if_unit); + if (strcmp(tifname, ifname) == 0) + return (ifnet.if_index); + } + + sprintf(ebuf, "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) { + sprintf(ebuf, "lseek: %s", pcap_strerror(errno)); + return (-1); + } + cc = read(fd, buf, len); + if (cc < 0) { + sprintf(ebuf, "read: %s", pcap_strerror(errno)); + return (-1); + } else if (cc != len) { + sprintf(ebuf, "short read (%d != %d)", cc, len); + return (-1); + } + return (cc); +} +#endif |