/* * 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 * , * Mark C. Brown (mbrown@hp.com), and Sagun Shakya . */ /* * 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 1.128 2008-12-02 16:20:23 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #ifdef HAVE_SYS_BUFMOD_H #include #endif #include #ifdef HAVE_SYS_DLPI_EXT_H #include #endif #ifdef HAVE_HPUX9 #include #endif #ifdef DL_HP_PPA_REQ #include #endif #include #if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H) #include #endif #ifdef HAVE_HPUX9 #include #endif #include #ifdef HAVE_HPUX9 #include #endif #include #include #include #include #include #include #include #include #ifdef HAVE_LIMITS_H #include #else #define INT_MAX 2147483647 #endif #include "pcap-int.h" #include "dlpisubs.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 /* 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 dlpromiscon(pcap_t *, bpf_u_int32); static int dlbindreq(int, bpf_u_int32, char *); static int dlbindack(int, char *, char *, int *); static int dlokack(int, const char *, char *, char *); static int dlinforeq(int, char *); static int dlinfoack(int, char *, char *); #ifdef HAVE_DLPI_PASSIVE static void dlpassive(int, char *); #endif #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_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 /* XXX Needed by HP-UX (at least) */ static bpf_u_int32 ctlbuf[MAXDLBUF]; static struct strbuf ctl = { MAXDLBUF, 0, (char *)ctlbuf }; /* * Cast a buffer to "union DL_primitives" without provoking warnings * from the compiler. */ #define MAKE_DL_PRIMITIVES(ptr) ((union DL_primitives *)(void *)(ptr)) static int pcap_read_dlpi(pcap_t *p, int cnt, pcap_handler callback, u_char *user) { int cc; u_char *bp; int flags; struct strbuf data; 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; return (pcap_process_pkts(p, callback, user, cnt, bp, cc)); } 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_cleanup_dlpi(pcap_t *p) { if (p->send_fd >= 0) { close(p->send_fd); p->send_fd = -1; } pcap_cleanup_live_common(p); } static int pcap_activate_dlpi(pcap_t *p) { register char *cp; int ppa; #ifdef HAVE_SOLARIS int isatm = 0; #endif register dl_info_ack_t *infop; #ifdef HAVE_SYS_BUFMOD_H bpf_u_int32 ss; #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 int status = PCAP_ERROR; #ifdef HAVE_DEV_DLPI /* ** Remove any "/dev/" on the front of the device. */ cp = strrchr(p->opt.source, '/'); if (cp == NULL) strlcpy(dname, p->opt.source, 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, p->errbuf); if (cp == NULL) { status = PCAP_ERROR_NO_SUCH_DEVICE; 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) { if (errno == EPERM || errno == EACCES) status = PCAP_ERROR_PERM_DENIED; snprintf(p->errbuf, 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, p->errbuf); if (ppa < 0) { status = ppa; 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 (*p->opt.source == '/') strlcpy(dname, p->opt.source, sizeof(dname)); else snprintf(dname, sizeof(dname), "%s/%s", PCAP_DEV_PREFIX, p->opt.source); /* * Get the unit number, and a pointer to the end of the device * type name. */ cp = split_dname(dname, &ppa, p->errbuf); if (cp == NULL) { status = PCAP_ERROR_NO_SUCH_DEVICE; 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) { if (errno == EPERM || errno == EACCES) status = PCAP_ERROR_PERM_DENIED; snprintf(p->errbuf, 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) { status = PCAP_ERROR_NO_SUCH_DEVICE; /* * We provide an error message even * for this error, for diagnostic * purposes (so that, for example, * the app can show the message if the * user requests it). * * In it, 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(p->errbuf, PCAP_ERRBUF_SIZE, "%s: No DLPI device found", p->opt.source); } else { if (errno == EPERM || errno == EACCES) status = PCAP_ERROR_PERM_DENIED; snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "%s: %s", dname2, pcap_strerror(errno)); } goto bad; } /* XXX Assume unit zero */ ppa = 0; } #endif /* ** Attach if "style 2" provider */ if (dlinforeq(p->fd, p->errbuf) < 0 || dlinfoack(p->fd, (char *)buf, p->errbuf) < 0) goto bad; infop = &(MAKE_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) { status = dl_doattach(p->fd, ppa, p->errbuf); if (status < 0) goto bad; #ifdef DL_HP_RAWDLS if (p->send_fd >= 0) { if (dl_doattach(p->send_fd, ppa, p->errbuf) < 0) goto bad; } #endif } if (p->opt.rfmon) { /* * This device exists, but we don't support monitor mode * any platforms that support DLPI. */ status = PCAP_ERROR_RFMON_NOTSUP; goto bad; } #ifdef HAVE_DLPI_PASSIVE /* * Enable Passive mode to be able to capture on aggregated link. * Not supported in all Solaris versions. */ dlpassive(p->fd, p->errbuf); #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, p->errbuf) < 0 && dlbindreq(p->fd, 2, p->errbuf) < 0) || dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0) goto bad; #elif defined(DL_HP_RAWDLS) /* ** HP-UX 10.0x and 10.1x. */ if (dl_dohpuxbind(p->fd, p->errbuf) < 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, p->errbuf) < 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, p->errbuf) < 0 || dlbindack(p->fd, (char *)buf, p->errbuf, 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(p->errbuf, PCAP_ERRBUF_SIZE, "A_PROMISCON_REQ: %s", pcap_strerror(errno)); goto bad; } } else #endif if (p->opt.promisc) { /* ** Enable promiscuous (not necessary on send FD) */ status = dlpromiscon(p, DL_PROMISC_PHYS); if (status < 0) { if (status == PCAP_ERROR_PERM_DENIED) status = PCAP_ERROR_PROMISC_PERM_DENIED; 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) status = dlpromiscon(p, DL_PROMISC_MULTI); if (status < 0) status = PCAP_WARNING; #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 !p->opt.promisc && #endif #ifdef HAVE_SOLARIS !isatm #endif ) { status = dlpromiscon(p, DL_PROMISC_SAP); if (status < 0) { /* * Not fatal, since the DL_PROMISC_PHYS mode worked. * Report it as a warning, however. */ if (p->opt.promisc) status = PCAP_WARNING; 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, p->errbuf) < 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, p->errbuf) < 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, p->errbuf) < 0 || dlinfoack(p->fd, (char *)buf, p->errbuf) < 0) goto bad; infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack; if (pcap_process_mactype(p, infop->dl_mac_type) != 0) 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(p->errbuf, PCAP_ERRBUF_SIZE, "DLIOCRAW: %s", pcap_strerror(errno)); goto bad; } #endif #ifdef HAVE_SYS_BUFMOD_H ss = p->snapshot; /* ** 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 fixed in 5.3.2. Also, there is a patch available. ** Ask for bugid 1149065. */ #ifdef HAVE_SOLARIS release = get_release(&osmajor, &osminor, &osmicro); if (osmajor == 5 && (osminor <= 2 || (osminor == 3 && osmicro < 2)) && getenv("BUFMOD_FIXED") == NULL) { snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "WARNING: bufmod is broken in SunOS %s; ignoring snaplen.", release); ss = 0; status = PCAP_WARNING; } #endif /* Push and configure bufmod. */ if (pcap_conf_bufmod(p, ss, p->md.timeout) != 0) goto bad; #endif /* ** As the last operation flush the read side. */ if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) { snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "FLUSHR: %s", pcap_strerror(errno)); goto bad; } /* Allocate data buffer. */ if (pcap_alloc_databuf(p) != 0) goto bad; /* Success - but perhaps with a warning */ if (status < 0) status = 0; /* * "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->cleanup_op = pcap_cleanup_dlpi; return (status); bad: pcap_cleanup_dlpi(p); return (status); } /* * 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) { dl_attach_req_t req; bpf_u_int32 buf[MAXDLBUF]; int err; req.dl_primitive = DL_ATTACH_REQ; req.dl_ppa = ppa; if (send_request(fd, (char *)&req, sizeof(req), "attach", ebuf) < 0) return (PCAP_ERROR); err = dlokack(fd, "attach", (char *)buf, ebuf); if (err < 0) return (err); 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 #define STRINGIFY(n) #n static int dlpromiscon(pcap_t *p, bpf_u_int32 level) { dl_promiscon_req_t req; bpf_u_int32 buf[MAXDLBUF]; int err; req.dl_primitive = DL_PROMISCON_REQ; req.dl_level = level; if (send_request(p->fd, (char *)&req, sizeof(req), "promiscon", p->errbuf) < 0) return (PCAP_ERROR); err = dlokack(p->fd, "promiscon" STRINGIFY(level), (char *)buf, p->errbuf); if (err < 0) return (err); 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, 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 (PCAP_ERROR); } dlp = MAKE_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)); if (dlp->error_ack.dl_unix_errno == EPERM || dlp->error_ack.dl_unix_errno == EACCES) return (PCAP_ERROR_PERM_DENIED); break; default: snprintf(ebuf, PCAP_ERRBUF_SIZE, "recv_ack: %s: %s", what, dlstrerror(dlp->error_ack.dl_errno)); if (dlp->error_ack.dl_errno == DL_BADPPA) return (PCAP_ERROR_NO_SUCH_DEVICE); else if (dlp->error_ack.dl_errno == DL_ACCESS) return (PCAP_ERROR_PERM_DENIED); break; } return (PCAP_ERROR); default: snprintf(ebuf, PCAP_ERRBUF_SIZE, "recv_ack: %s: Unexpected primitive ack %s", what, dlprim(dlp->dl_primitive)); return (PCAP_ERROR); } if (ctl.len < size) { snprintf(ebuf, PCAP_ERRBUF_SIZE, "recv_ack: %s: Ack too small (%d < %d)", what, ctl.len, size); return (PCAP_ERROR); } 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 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 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 HAVE_DLPI_PASSIVE /* * Enable DLPI passive mode. We do not care if this request fails, as this * indicates the underlying DLPI device does not support link aggregation. */ static void dlpassive(int fd, char *ebuf) { dl_passive_req_t req; bpf_u_int32 buf[MAXDLBUF]; req.dl_primitive = DL_PASSIVE_REQ; if (send_request(fd, (char *)&req, sizeof(req), "dlpassive", ebuf) == 0) (void) dlokack(fd, "dlpassive", (char *)buf, ebuf); } #endif #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 = MAKE_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 */ #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 (PCAP_ERROR); 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 (PCAP_ERROR); } 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 (PCAP_ERROR); } 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 (PCAP_ERROR); } /* 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 (PCAP_ERROR); } 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 (PCAP_ERROR); } if (ctl.len < dlp->dl_length) { snprintf(ebuf, PCAP_ERRBUF_SIZE, "get_dlpi_ppa: hpppa ack too small (%d < %lu)", ctl.len, (unsigned long)dlp->dl_length); free(ppa_data_buf); return (PCAP_ERROR); } 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/", * 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 (PCAP_ERROR); } 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 (PCAP_ERROR_NO_SUCH_DEVICE); } 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 (PCAP_ERROR); } 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 pcap_t * pcap_create(const char *device, char *ebuf) { pcap_t *p; p = pcap_create_common(device, ebuf); if (p == NULL) return (NULL); p->send_fd = -1; /* it hasn't been opened yet */ p->activate_op = pcap_activate_dlpi; return (p); }