diff options
Diffstat (limited to 'pcap-dlpi.c')
-rw-r--r-- | pcap-dlpi.c | 1873 |
1 files changed, 1873 insertions, 0 deletions
diff --git a/pcap-dlpi.c b/pcap-dlpi.c new file mode 100644 index 0000000..8ea7850 --- /dev/null +++ b/pcap-dlpi.c @@ -0,0 +1,1873 @@ +/* + * 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), Mark Pizzolato + * <List-tcpdump-workers@subscriptions.pizzolato.net>, + * and Mark C. Brown (mbrown@hp.com). + */ + +/* + * 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. + * + * - An older version of the HP-UX DLPI Programmer's Guide, which + * I think was advertised as the 10.20 version, 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 10.x, 11.0, and 11i v1.6 version of the HP-UX DLPI + * Programmer's Guide, which I think was once advertised as the + * 11.00 version is available at + * + * http://docs.hp.com/en/B2355-90139/index.html + * + * - The HP-UX 11i v2 version of the HP-UX DLPI Programmer's Guide + * is available at + * + * http://docs.hp.com/en/B2355-90871/index.html + * + * - All of the HP documents describe raw-mode services, which are + * what we use if DL_HP_RAWDLS is defined. XXX - we use __hpux + * in some places to test for HP-UX, but use DL_HP_RAWDLS in + * other places; do we support any versions of HP-UX without + * DL_HP_RAWDLS? + */ + +#ifndef lint +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/libpcap/pcap-dlpi.c,v 1.108.2.7 2006/04/04 05:33:02 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 *); +#ifdef DL_HP_RAWDLS +static int dl_dohpuxbind(int, char *); +#endif +static int dlattachreq(int, bpf_u_int32, char *); +static int dlbindreq(int, bpf_u_int32, char *); +static int dlbindack(int, char *, char *, int *); +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 *, int *); +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); + } + /* + * putmsg() returns either 0 or -1; it doesn't indicate how + * many bytes were written (presumably they were all written + * or none of them were written). OpenBSD's pcap_inject() + * returns the number of bytes written, so, for API compatibility, + * we return the number of bytes we were told to write. + */ + ret = size; +#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 need separate + * descriptors for sending and receiving, bound to different SAPs. + * + * 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 or later, totally + ** skip if using SINIX) + */ +#if !defined(HAVE_HPUX9) && !defined(HAVE_HPUX10_20_OR_LATER) && !defined(sinix) +#ifdef _AIX + /* + ** 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, NULL) < 0) + goto bad; +#elif defined(DL_HP_RAWDLS) + /* + ** HP-UX 10.0x and 10.1x. + */ + if (dl_dohpuxbind(p->fd, ebuf) < 0) + goto bad; + if (p->send_fd >= 0) { + /* + ** XXX - if this fails, just close send_fd and + ** set it to -1, so that you can't send but can + ** still receive? + */ + if (dl_dohpuxbind(p->send_fd, ebuf) < 0) + goto bad; + } +#else /* neither AIX nor HP-UX */ + /* + ** Not Sinix, and neither AIX nor HP-UX - Solaris, and any other + ** OS using DLPI. + **/ + if (dlbindreq(p->fd, 0, ebuf) < 0 || + dlbindack(p->fd, (char *)buf, ebuf, NULL) < 0) + goto bad; +#endif /* AIX vs. HP-UX vs. other */ +#endif /* !HP-UX 9 and !HP-UX 10.20 or later and !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 promiscuity (when not in promiscuous mode + ** when 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 /* sinix */ + + /* + ** HP-UX 9, and HP-UX 10.20 or later, must bind after setting + ** promiscuous options. + */ +#if defined(HAVE_HPUX9) || defined(HAVE_HPUX10_20_OR_LATER) + if (dl_dohpuxbind(p->fd, ebuf) < 0) + goto bad; + /* + ** We don't set promiscuous mode on the send FD, but we'll defer + ** binding it anyway, just to keep the HP-UX 9/10.20 or later + ** code together. + */ + if (p->send_fd >= 0) { + /* + ** XXX - if this fails, just close send_fd and + ** set it to -1, so that you can't send but can + ** still receive? + */ + if (dl_dohpuxbind(p->send_fd, 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->setdirection_op = NULL; /* Not implemented.*/ + 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); +} + +#ifdef DL_HP_RAWDLS +static int +dl_dohpuxbind(int fd, char *ebuf) +{ + int hpsap; + int uerror; + bpf_u_int32 buf[MAXDLBUF]; + + /* + * XXX - we start at 22 because we used to use only 22, but + * that was just because that was the value used in some + * sample code from HP. With what value *should* we start? + * Does it matter, given that we're enabling SAP promiscuity + * on the input FD? + */ + hpsap = 22; + for (;;) { + if (dlbindreq(fd, hpsap, ebuf) < 0) + return (-1); + if (dlbindack(fd, (char *)buf, ebuf, &uerror) >= 0) + break; + /* + * For any error other than a UNIX EBUSY, give up. + */ + if (uerror != EBUSY) { + /* + * dlbindack() has already filled in ebuf for + * this error. + */ + return (-1); + } + + /* + * For EBUSY, try the next SAP value; that means that + * somebody else is using that SAP. Clear ebuf so + * that application doesn't report the "Device busy" + * error as a warning. + */ + *ebuf = '\0'; + hpsap++; + if (hpsap > 100) { + strlcpy(ebuf, + "All SAPs from 22 through 100 are in use", + PCAP_ERRBUF_SIZE); + return (-1); + } + } + return (0); +} +#endif + +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, int *uerror) +{ + union DL_primitives *dlp; + struct strbuf ctl; + int flags; + + /* + * Clear out "*uerror", so it's only set for DL_ERROR_ACK/DL_SYSERR, + * making that the only place where EBUSY is treated specially. + */ + if (uerror != NULL) + *uerror = 0; + + 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: + if (uerror != NULL) + *uerror = dlp->error_ack.dl_unix_errno; + 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; + /* XXX - what if neither of these are defined? */ +#if defined(DL_HP_RAWDLS) + req.dl_max_conind = 1; /* XXX magic number */ + req.dl_service_mode = DL_HP_RAWDLS; +#elif defined(DL_CLDLS) + req.dl_service_mode = DL_CLDLS; +#endif + req.dl_sap = sap; + + return (send_request(fd, (char *)&req, sizeof(req), "bind", ebuf)); +} + +static int +dlbindack(int fd, char *bufp, char *ebuf, int *uerror) +{ + + return (recv_ack(fd, DL_BIND_ACK_SIZE, "bind", bufp, ebuf, uerror)); +} + +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, NULL)); +} + + +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, NULL)); +} + +#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 |