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freebsd/contrib/libpcap/pcap-dlpi.c

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/*
* 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, and subsequently modified by
* Guy Harris (guy@alum.mit.edu) and Mark Pizzolato
* <List-tcpdump-workers@subscriptions.pizzolato.net>.
*/
/*
* Packet capture routine for DLPI under SunOS 5, HP-UX 9/10/11, and AIX.
*
* Notes:
*
* - 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 when possible.
*
* - The HP-UX 10.20 DLPI Programmer's Guide used to be available
* at
*
* http://docs.hp.com/hpux/onlinedocs/B2355-90093/B2355-90093.html
*
* but is no longer available; it can still be found at
*
* http://h21007.www2.hp.com/dspp/files/unprotected/Drivers/Docs/Refs/B2355-90093.pdf
*
* in PDF form.
*
* - The HP-UX 11.00 DLPI Programmer's Guide is available at
*
* http://docs.hp.com/hpux/onlinedocs/B2355-90139/B2355-90139.html
*
* and in PDF form at
*
* http://h21007.www2.hp.com/dspp/files/unprotected/Drivers/Docs/Refs/B2355-90139.pdf
*
* - Both of the HP documents describe raw-mode services, which are
* what we use if DL_HP_RAWDLS is defined.
*/
#ifndef lint
static const char rcsid[] _U_ =
"@(#) $Header: /tcpdump/master/libpcap/pcap-dlpi.c,v 1.108 2004/10/19 07:06:12 guy Exp $ (LBL)";
#endif
#ifdef HAVE_CONFIG_H
#include "config.h"
#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_REQ
#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>
#ifdef HAVE_LIMITS_H
#include <limits.h>
#else
#define INT_MAX 2147483647
#endif
#include "pcap-int.h"
#ifdef HAVE_OS_PROTO_H
#include "os-proto.h"
#endif
#ifndef PCAP_DEV_PREFIX
#ifdef _AIX
#define PCAP_DEV_PREFIX "/dev/dlpi"
#else
#define PCAP_DEV_PREFIX "/dev"
#endif
#endif
#define MAXDLBUF 8192
#ifdef HAVE_SYS_BUFMOD_H
/*
* Size of a bufmod chunk to pass upstream; that appears to be the biggest
* value to which you can set it, and setting it to that value (which
* is bigger than what appears to be the Solaris default of 8192)
* reduces the number of packet drops.
*/
#define CHUNKSIZE 65536
/*
* Size of the buffer to allocate for packet data we read; it must be
* large enough to hold a chunk.
*/
#define PKTBUFSIZE CHUNKSIZE
#else /* HAVE_SYS_BUFMOD_H */
/*
* Size of the buffer to allocate for packet data we read; this is
* what the value used to be - there's no particular reason why it
* should be tied to MAXDLBUF, but we'll leave it as this for now.
*/
#define PKTBUFSIZE (MAXDLBUF * sizeof(bpf_u_int32))
#endif
/* Forwards */
static char *split_dname(char *, int *, char *);
static int dl_doattach(int, int, char *);
static int dlattachreq(int, bpf_u_int32, char *);
static int dlbindreq(int, bpf_u_int32, char *);
static int dlbindack(int, char *, char *);
static int dlpromisconreq(int, bpf_u_int32, char *);
static int dlokack(int, const char *, char *, char *);
static int dlinforeq(int, char *);
static int dlinfoack(int, char *, char *);
#ifdef DL_HP_RAWDLS
static int dlrawdatareq(int, const u_char *, int);
#endif
static int recv_ack(int, int, const char *, char *, char *);
static char *dlstrerror(bpf_u_int32);
static char *dlprim(bpf_u_int32);
#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
static int
pcap_stats_dlpi(pcap_t *p, struct pcap_stat *ps)
{
/*
* "ps_recv" counts packets handed to the filter, not packets
* that passed the filter. As filtering is done in userland,
* this would not include packets dropped because we ran out
* of buffer space; in order to make this more like other
* platforms (Linux 2.4 and later, BSDs with BPF), where the
* "packets received" count includes packets received but dropped
* due to running out of buffer space, and to keep from confusing
* applications that, for example, compute packet drop percentages,
* we also make it count packets dropped by "bufmod" (otherwise we
* might run the risk of the packet drop count being bigger than
* the received-packet count).
*
* "ps_drop" counts packets dropped by "bufmod" because of
* flow control requirements or resource exhaustion; it doesn't
* count packets dropped by the interface driver, or packets
* dropped upstream. As filtering is done in userland, it counts
* packets regardless of whether they would've passed the filter.
*
* These statistics don't include packets not yet read from
* the kernel by libpcap, but they may include packets not
* yet read from libpcap by the application.
*/
*ps = p->md.stat;
/*
* Add in the drop count, as per the above comment.
*/
ps->ps_recv += ps->ps_drop;
return (0);
}
/* XXX Needed by HP-UX (at least) */
static bpf_u_int32 ctlbuf[MAXDLBUF];
static struct strbuf ctl = {
MAXDLBUF,
0,
(char *)ctlbuf
};
static int
pcap_read_dlpi(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 = p->bufsize;
data.len = 0;
do {
/*
* Has "pcap_breakloop()" been called?
*/
if (p->break_loop) {
/*
* Yes - clear the flag that indicates
* that it has, and return -2 to
* indicate that we were told to
* break out of the loop.
*/
p->break_loop = 0;
return (-2);
}
/*
* XXX - check for the DLPI primitive, which
* would be DL_HP_RAWDATA_IND on HP-UX
* if we're in raw mode?
*/
if (getmsg(p->fd, &ctl, &data, &flags) < 0) {
/* Don't choke when we get ptraced */
switch (errno) {
case EINTR:
cc = 0;
continue;
case EAGAIN:
return (0);
}
strlcpy(p->errbuf, pcap_strerror(errno),
sizeof(p->errbuf));
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) {
/*
* Has "pcap_breakloop()" been called?
* If so, return immediately - if we haven't read any
* packets, clear the flag and return -2 to indicate
* that we were told to break out of the loop, otherwise
* leave the flag set, so that the *next* call will break
* out of the loop without having read any packets, and
* return the number of packets we've processed so far.
*/
if (p->break_loop) {
if (n == 0) {
p->break_loop = 0;
return (-2);
} else {
p->bp = bp;
p->cc = ep - bp;
return (n);
}
}
#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.tv_sec = sbp->sbh_timestamp.tv_sec;
pkthdr.ts.tv_usec = sbp->sbh_timestamp.tv_usec;
#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);
}
static int
pcap_inject_dlpi(pcap_t *p, const void *buf, size_t size)
{
int ret;
#if defined(DLIOCRAW)
ret = write(p->fd, buf, size);
if (ret == -1) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send: %s",
pcap_strerror(errno));
return (-1);
}
#elif defined(DL_HP_RAWDLS)
if (p->send_fd < 0) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"send: Output FD couldn't be opened");
return (-1);
}
ret = dlrawdatareq(p->send_fd, buf, size);
if (ret == -1) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "send: %s",
pcap_strerror(errno));
return (-1);
}
#else /* no raw mode */
/*
* XXX - this is a pain, because you might have to extract
* the address from the packet and use it in a DL_UNITDATA_REQ
* request. That would be dependent on the link-layer type.
*
* I also don't know what SAP you'd have to bind the descriptor
* to, or whether you'd need separate "receive" and "send" FDs,
* nor do I know whether you'd need different bindings for
* D/I/X Ethernet and 802.3, or for {FDDI,Token Ring} plus
* 802.2 and {FDDI,Token Ring} plus 802.2 plus SNAP.
*
* So, for now, we just return a "you can't send" indication,
* and leave it up to somebody with a DLPI-based system lacking
* both DLIOCRAW and DL_HP_RAWDLS to supply code to implement
* packet transmission on that system. If they do, they should
* send it to us - but should not send us code that assumes
* Ethernet; if the code doesn't work on non-Ethernet interfaces,
* it should check "p->linktype" and reject the send request if
* it's anything other than DLT_EN10MB.
*/
strlcpy(p->errbuf, "send: Not supported on this version of this OS",
PCAP_ERRBUF_SIZE);
ret = -1;
#endif /* raw mode */
return (ret);
}
#ifndef DL_IPATM
#define DL_IPATM 0x12 /* ATM Classical IP interface */
#endif
#ifdef HAVE_SOLARIS
/*
* For SunATM.
*/
#ifndef A_GET_UNITS
#define A_GET_UNITS (('A'<<8)|118)
#endif /* A_GET_UNITS */
#ifndef A_PROMISCON_REQ
#define A_PROMISCON_REQ (('A'<<8)|121)
#endif /* A_PROMISCON_REQ */
#endif /* HAVE_SOLARIS */
static void
pcap_close_dlpi(pcap_t *p)
{
pcap_close_common(p);
if (p->send_fd >= 0)
close(p->send_fd);
}
pcap_t *
pcap_open_live(const char *device, int snaplen, int promisc, int to_ms,
char *ebuf)
{
register char *cp;
register pcap_t *p;
int ppa;
#ifdef HAVE_SOLARIS
int isatm = 0;
#endif
register dl_info_ack_t *infop;
#ifdef HAVE_SYS_BUFMOD_H
bpf_u_int32 ss, chunksize;
#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) {
strlcpy(ebuf, pcap_strerror(errno), PCAP_ERRBUF_SIZE);
return (NULL);
}
memset(p, 0, sizeof(*p));
p->fd = -1; /* indicate that it hasn't been opened yet */
p->send_fd = -1;
#ifdef HAVE_DEV_DLPI
/*
** Remove any "/dev/" on the front of the device.
*/
cp = strrchr(device, '/');
if (cp == NULL)
strlcpy(dname, device, sizeof(dname));
else
strlcpy(dname, cp + 1, sizeof(dname));
/*
* Split the device name into a device type name and a unit number;
* chop off the unit number, so "dname" is just a device type name.
*/
cp = split_dname(dname, &ppa, ebuf);
if (cp == NULL)
goto bad;
*cp = '\0';
/*
* Use "/dev/dlpi" as the device.
*
* XXX - HP's DLPI Programmer's Guide for HP-UX 11.00 says that
* the "dl_mjr_num" field is for the "major number of interface
* driver"; that's the major of "/dev/dlpi" on the system on
* which I tried this, but there may be DLPI devices that
* use a different driver, in which case we may need to
* search "/dev" for the appropriate device with that major
* device number, rather than hardwiring "/dev/dlpi".
*/
cp = "/dev/dlpi";
if ((p->fd = open(cp, O_RDWR)) < 0) {
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"%s: %s", cp, pcap_strerror(errno));
goto bad;
}
#ifdef DL_HP_RAWDLS
/*
* XXX - HP-UX 10.20 and 11.xx don't appear to support sending and
* receiving packets on the same descriptor - you have to bind the
* descriptor on which you receive to a SAP of 22 and bind the
* descriptor on which you send to a SAP of 24.
*
* If the open fails, we just leave -1 in "p->send_fd" and reject
* attempts to send packets, just as if, in pcap-bpf.c, we fail
* to open the BPF device for reading and writing, we just try
* to open it for reading only and, if that succeeds, just let
* the send attempts fail.
*/
p->send_fd = open(cp, O_RDWR);
#endif
/*
* Get a table of all PPAs for that device, and search that
* table for the specified device type name and unit number.
*/
ppa = get_dlpi_ppa(p->fd, dname, ppa, ebuf);
if (ppa < 0)
goto bad;
#else
/*
* If the device name begins with "/", assume it begins with
* the pathname of the directory containing the device to open;
* otherwise, concatenate the device directory name and the
* device name.
*/
if (*device == '/')
strlcpy(dname, device, sizeof(dname));
else
snprintf(dname, sizeof(dname), "%s/%s", PCAP_DEV_PREFIX,
device);
/*
* Get the unit number, and a pointer to the end of the device
* type name.
*/
cp = split_dname(dname, &ppa, ebuf);
if (cp == NULL)
goto bad;
/*
* Make a copy of the device pathname, and then remove the unit
* number from the device pathname.
*/
strlcpy(dname2, dname, sizeof(dname));
*cp = '\0';
/* Try device without unit number */
if ((p->fd = open(dname, O_RDWR)) < 0) {
if (errno != ENOENT) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s: %s", dname,
pcap_strerror(errno));
goto bad;
}
/* Try again with unit number */
if ((p->fd = open(dname2, O_RDWR)) < 0) {
if (errno == ENOENT) {
/*
* We just report "No DLPI device found"
* with the device name, so people don't
* get confused and think, for example,
* that if they can't capture on "lo0"
* on Solaris the fix is to change libpcap
* (or the application that uses it) to
* look for something other than "/dev/lo0",
* as the fix is to look for an operating
* system other than Solaris - you just
* *can't* capture on a loopback interface
* on Solaris, the lack of a DLPI device
* for the loopback interface is just a
* symptom of that inability.
*/
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"%s: No DLPI device found", device);
} else {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%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;
#ifdef HAVE_SOLARIS
if (infop->dl_mac_type == DL_IPATM)
isatm = 1;
#endif
if (infop->dl_provider_style == DL_STYLE2) {
if (dl_doattach(p->fd, ppa, ebuf) < 0)
goto bad;
#ifdef DL_HP_RAWDLS
if (p->send_fd >= 0) {
if (dl_doattach(p->send_fd, ppa, ebuf) < 0)
goto bad;
}
#endif
}
/*
** 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) ||
dlbindack(p->fd, (char *)buf, ebuf) < 0)
goto bad;
#elif defined(DL_HP_RAWDLS)
/*
** This is the descriptor on which we receive packets; we
** bind it to 22, as that's INSAP, as per the HP-UX DLPI
** Programmer's Guide.
*/
if (dlbindreq(p->fd, 22, ebuf) < 0 ||
dlbindack(p->fd, (char *)buf, ebuf) < 0)
goto bad;
if (p->send_fd >= 0) {
/*
** This is the descriptor on which we send packets; we
** bind it to 24, as that's OUTSAP, as per the HP-UX
** DLPI Programmer's Guide.
*/
if (dlbindreq(p->send_fd, 24, ebuf) < 0 ||
dlbindack(p->send_fd, (char *)buf, ebuf) < 0)
goto bad;
}
#else /* neither AIX nor HP-UX */
if (dlbindreq(p->fd, 0, ebuf) < 0 ||
dlbindack(p->fd, (char *)buf, ebuf) < 0)
goto bad;
#endif /* SAP to bind to */
#endif /* HP-UX 9 or 10.20 or SINIX */
#ifdef HAVE_SOLARIS
if (isatm) {
/*
** Have to turn on some special ATM promiscuous mode
** for SunATM.
** Do *NOT* turn regular promiscuous mode on; it doesn't
** help, and may break things.
*/
if (strioctl(p->fd, A_PROMISCON_REQ, 0, NULL) < 0) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "A_PROMISCON_REQ: %s",
pcap_strerror(errno));
goto bad;
}
} else
#endif
if (promisc) {
/*
** Enable promiscuous (not necessary on send FD)
*/
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) (Not necessary on send FD)
*/
#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, when not doing SunATM on Solaris, and never
** under SINIX) (Not necessary on send FD)
*/
#ifndef sinix
if (
#ifdef __hpux
!promisc &&
#endif
#ifdef HAVE_SOLARIS
!isatm &&
#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
** XXX - get SAP length and address length as well, for use
** when sending packets.
*/
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;
/*
* This is (presumably) a real Ethernet capture; give it a
* link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
* that an application can let you choose it, in case you're
* capturing DOCSIS traffic that a Cisco Cable Modem
* Termination System is putting out onto an Ethernet (it
* doesn't put an Ethernet header onto the wire, it puts raw
* DOCSIS frames out on the wire inside the low-level
* Ethernet framing).
*/
p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2);
/*
* If that fails, just leave the list empty.
*/
if (p->dlt_list != NULL) {
p->dlt_list[0] = DLT_EN10MB;
p->dlt_list[1] = DLT_DOCSIS;
p->dlt_count = 2;
}
break;
case DL_FDDI:
p->linktype = DLT_FDDI;
p->offset = 3;
break;
case DL_TPR:
/*
* XXX - what about DL_TPB? Is that Token Bus?
*/
p->linktype = DLT_IEEE802;
p->offset = 2;
break;
#ifdef HAVE_SOLARIS
case DL_IPATM:
p->linktype = DLT_SUNATM;
p->offset = 0; /* works for LANE and LLC encapsulation */
break;
#endif
default:
snprintf(ebuf, PCAP_ERRBUF_SIZE, "unknown mac type %lu",
(unsigned long)infop->dl_mac_type);
goto bad;
}
#ifdef DLIOCRAW
/*
** This is a non standard SunOS hack to get the full raw link-layer
** 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 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;
}
}
/*
** Set the chunk length.
*/
chunksize = CHUNKSIZE;
if (strioctl(p->fd, SBIOCSCHUNK, sizeof(chunksize), (char *)&chunksize)
!= 0) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "SBIOCSCHUNKP: %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 = PKTBUFSIZE;
p->buffer = (u_char *)malloc(p->bufsize + p->offset);
if (p->buffer == NULL) {
strlcpy(ebuf, pcap_strerror(errno), PCAP_ERRBUF_SIZE);
goto bad;
}
/*
* "p->fd" is an FD for a STREAMS device, so "select()" and
* "poll()" should work on it.
*/
p->selectable_fd = p->fd;
p->read_op = pcap_read_dlpi;
p->inject_op = pcap_inject_dlpi;
p->setfilter_op = install_bpf_program; /* no kernel filtering */
p->set_datalink_op = NULL; /* can't change data link type */
p->getnonblock_op = pcap_getnonblock_fd;
p->setnonblock_op = pcap_setnonblock_fd;
p->stats_op = pcap_stats_dlpi;
p->close_op = pcap_close_dlpi;
return (p);
bad:
if (p->fd >= 0)
close(p->fd);
if (p->send_fd >= 0)
close(p->send_fd);
/*
* Get rid of any link-layer type list we allocated.
*/
if (p->dlt_list != NULL)
free(p->dlt_list);
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;
long 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--;
errno = 0;
unit = strtol(cp, &eos, 10);
if (*eos != '\0') {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s bad unit number", device);
return (NULL);
}
if (errno == ERANGE || unit > INT_MAX) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number too large",
device);
return (NULL);
}
if (unit < 0) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number is negative",
device);
return (NULL);
}
*unitp = (int)unit;
return (cp);
}
static int
dl_doattach(int fd, int ppa, char *ebuf)
{
bpf_u_int32 buf[MAXDLBUF];
if (dlattachreq(fd, ppa, ebuf) < 0 ||
dlokack(fd, "attach", (char *)buf, ebuf) < 0)
return (-1);
return (0);
}
int
pcap_platform_finddevs(pcap_if_t **alldevsp, char *errbuf)
{
#ifdef HAVE_SOLARIS
int fd;
union {
u_int nunits;
char pad[516]; /* XXX - must be at least 513; is 516
in "atmgetunits" */
} buf;
char baname[2+1+1];
u_int i;
/*
* We may have to do special magic to get ATM devices.
*/
if ((fd = open("/dev/ba", O_RDWR)) < 0) {
/*
* We couldn't open the "ba" device.
* For now, just give up; perhaps we should
* return an error if the problem is neither
* a "that device doesn't exist" error (ENOENT,
* ENXIO, etc.) or a "you're not allowed to do
* that" error (EPERM, EACCES).
*/
return (0);
}
if (strioctl(fd, A_GET_UNITS, sizeof(buf), (char *)&buf) < 0) {
snprintf(errbuf, PCAP_ERRBUF_SIZE, "A_GET_UNITS: %s",
pcap_strerror(errno));
return (-1);
}
for (i = 0; i < buf.nunits; i++) {
snprintf(baname, sizeof baname, "ba%u", i);
if (pcap_add_if(alldevsp, baname, 0, NULL, errbuf) < 0)
return (-1);
}
#endif
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 DL_HP_RAWDLS
/*
* There's an ack *if* there's an error.
*/
static int
dlrawdatareq(int fd, const u_char *datap, int datalen)
{
struct strbuf ctl, data;
long buf[MAXDLBUF]; /* XXX - char? */
union DL_primitives *dlp;
int dlen;
dlp = (union DL_primitives*) buf;
dlp->dl_primitive = DL_HP_RAWDATA_REQ;
dlen = DL_HP_RAWDATA_REQ_SIZE;
/*
* HP's documentation doesn't appear to show us supplying any
* address pointed to by the control part of the message.
* I think that's what raw mode means - you just send the raw
* packet, you don't specify where to send it to, as that's
* implied by the destination address.
*/
ctl.maxlen = 0;
ctl.len = dlen;
ctl.buf = (void *)buf;
data.maxlen = 0;
data.len = datalen;
data.buf = (void *)datap;
return (putmsg(fd, &ctl, &data, 0));
}
#endif /* DL_HP_RAWDLS */
#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_REQ
/*
* 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 < %lu)",
ctl.len, (unsigned long)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
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