Local changes: - In contrib/libpcap/pcap/bpf.h, do not include pcap/dlt.h. Our system net/dlt.h is pulled in from net/bpf.h. - sys/net/dlt.h: Incorporate changes from libpcap 1.10.3. - lib/libpcap/Makefile: Update for libpcap 1.10.3. Changelog: https://git.tcpdump.org/libpcap/blob/95691ebe7564afa3faa5c6ba0dbd17e351be455a:/CHANGES Reviewed by: emaste Obtained from: https://www.tcpdump.org/release/libpcap-1.10.3.tar.gz Sponsored by: The FreeBSD Foundation
518 lines
13 KiB
C
518 lines
13 KiB
C
/*
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* Copyright (c) 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* This code contributed by Sagun Shakya (sagun.shakya@sun.com)
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*/
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/*
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* Packet capture routines for DLPI using libdlpi under SunOS 5.11.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/bufmod.h>
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#include <sys/stream.h>
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#include <libdlpi.h>
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#include <errno.h>
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#include <memory.h>
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#include <stropts.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "pcap-int.h"
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#include "dlpisubs.h"
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/* Forwards. */
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static int dlpromiscon(pcap_t *, bpf_u_int32);
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static int pcap_read_libdlpi(pcap_t *, int, pcap_handler, u_char *);
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static int pcap_inject_libdlpi(pcap_t *, const void *, int);
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static void pcap_libdlpi_err(const char *, const char *, int, char *);
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static void pcap_cleanup_libdlpi(pcap_t *);
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/*
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* list_interfaces() will list all the network links that are
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* available on a system.
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*/
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static boolean_t list_interfaces(const char *, void *);
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typedef struct linknamelist {
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char linkname[DLPI_LINKNAME_MAX];
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struct linknamelist *lnl_next;
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} linknamelist_t;
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typedef struct linkwalk {
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linknamelist_t *lw_list;
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int lw_err;
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} linkwalk_t;
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/*
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* The caller of this function should free the memory allocated
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* for each linknamelist_t "entry" allocated.
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*/
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static boolean_t
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list_interfaces(const char *linkname, void *arg)
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{
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linkwalk_t *lwp = arg;
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linknamelist_t *entry;
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if ((entry = calloc(1, sizeof(linknamelist_t))) == NULL) {
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lwp->lw_err = ENOMEM;
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return (B_TRUE);
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}
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(void) pcap_strlcpy(entry->linkname, linkname, DLPI_LINKNAME_MAX);
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if (lwp->lw_list == NULL) {
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lwp->lw_list = entry;
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} else {
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entry->lnl_next = lwp->lw_list;
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lwp->lw_list = entry;
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}
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return (B_FALSE);
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}
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static int
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pcap_activate_libdlpi(pcap_t *p)
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{
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struct pcap_dlpi *pd = p->priv;
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int status = 0;
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int retv;
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dlpi_handle_t dh;
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dlpi_info_t dlinfo;
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/*
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* Enable Solaris raw and passive DLPI extensions;
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* dlpi_open() will not fail if the underlying link does not support
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* passive mode. See dlpi(7P) for details.
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*/
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retv = dlpi_open(p->opt.device, &dh, DLPI_RAW|DLPI_PASSIVE);
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if (retv != DLPI_SUCCESS) {
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if (retv == DLPI_ELINKNAMEINVAL || retv == DLPI_ENOLINK) {
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/*
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* There's nothing more to say, so clear the
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* error message.
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*/
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status = PCAP_ERROR_NO_SUCH_DEVICE;
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p->errbuf[0] = '\0';
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} else if (retv == DL_SYSERR &&
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(errno == EPERM || errno == EACCES)) {
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status = PCAP_ERROR_PERM_DENIED;
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snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
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"Attempt to open DLPI device failed with %s - root privilege may be required",
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(errno == EPERM) ? "EPERM" : "EACCES");
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} else {
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status = PCAP_ERROR;
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pcap_libdlpi_err(p->opt.device, "dlpi_open", retv,
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p->errbuf);
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}
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return (status);
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}
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pd->dlpi_hd = dh;
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if (p->opt.rfmon) {
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/*
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* This device exists, but we don't support monitor mode
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* any platforms that support DLPI.
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*/
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status = PCAP_ERROR_RFMON_NOTSUP;
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goto bad;
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}
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/* Bind with DLPI_ANY_SAP. */
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if ((retv = dlpi_bind(pd->dlpi_hd, DLPI_ANY_SAP, 0)) != DLPI_SUCCESS) {
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status = PCAP_ERROR;
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pcap_libdlpi_err(p->opt.device, "dlpi_bind", retv, p->errbuf);
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goto bad;
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}
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/*
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* Turn a negative snapshot value (invalid), a snapshot value of
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* 0 (unspecified), or a value bigger than the normal maximum
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* value, into the maximum allowed value.
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*
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* If some application really *needs* a bigger snapshot
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* length, we should just increase MAXIMUM_SNAPLEN.
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*/
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if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN)
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p->snapshot = MAXIMUM_SNAPLEN;
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/* Enable promiscuous mode. */
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if (p->opt.promisc) {
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retv = dlpromiscon(p, DL_PROMISC_PHYS);
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if (retv < 0) {
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/*
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* "You don't have permission to capture on
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* this device" and "you don't have permission
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* to capture in promiscuous mode on this
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* device" are different; let the user know,
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* so if they can't get permission to
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* capture in promiscuous mode, they can at
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* least try to capture in non-promiscuous
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* mode.
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*
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* XXX - you might have to capture in
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* promiscuous mode to see outgoing packets.
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*/
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if (retv == PCAP_ERROR_PERM_DENIED)
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status = PCAP_ERROR_PROMISC_PERM_DENIED;
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else
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status = retv;
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goto bad;
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}
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} else {
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/* Try to enable multicast. */
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retv = dlpromiscon(p, DL_PROMISC_MULTI);
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if (retv < 0) {
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status = retv;
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goto bad;
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}
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}
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/* Try to enable SAP promiscuity. */
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retv = dlpromiscon(p, DL_PROMISC_SAP);
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if (retv < 0) {
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/*
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* Not fatal, since the DL_PROMISC_PHYS mode worked.
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* Report it as a warning, however.
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*/
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if (p->opt.promisc)
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status = PCAP_WARNING;
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else {
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status = retv;
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goto bad;
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}
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}
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/* Determine link type. */
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if ((retv = dlpi_info(pd->dlpi_hd, &dlinfo, 0)) != DLPI_SUCCESS) {
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status = PCAP_ERROR;
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pcap_libdlpi_err(p->opt.device, "dlpi_info", retv, p->errbuf);
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goto bad;
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}
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if (pcap_process_mactype(p, dlinfo.di_mactype) != 0) {
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status = PCAP_ERROR;
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goto bad;
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}
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p->fd = dlpi_fd(pd->dlpi_hd);
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/* Push and configure bufmod. */
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if (pcap_conf_bufmod(p, p->snapshot) != 0) {
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status = PCAP_ERROR;
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goto bad;
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}
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/*
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* Flush the read side.
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*/
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if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
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status = PCAP_ERROR;
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pcap_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
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errno, "FLUSHR");
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goto bad;
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}
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/* Allocate data buffer. */
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if (pcap_alloc_databuf(p) != 0) {
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status = PCAP_ERROR;
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goto bad;
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}
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/*
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* "p->fd" is a FD for a STREAMS device, so "select()" and
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* "poll()" should work on it.
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*/
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p->selectable_fd = p->fd;
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p->read_op = pcap_read_libdlpi;
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p->inject_op = pcap_inject_libdlpi;
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p->setfilter_op = install_bpf_program; /* No kernel filtering */
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p->setdirection_op = NULL; /* Not implemented */
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p->set_datalink_op = NULL; /* Can't change data link type */
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p->getnonblock_op = pcap_getnonblock_fd;
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p->setnonblock_op = pcap_setnonblock_fd;
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p->stats_op = pcap_stats_dlpi;
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p->cleanup_op = pcap_cleanup_libdlpi;
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return (status);
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bad:
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pcap_cleanup_libdlpi(p);
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return (status);
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}
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#define STRINGIFY(n) #n
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static int
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dlpromiscon(pcap_t *p, bpf_u_int32 level)
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{
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struct pcap_dlpi *pd = p->priv;
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int retv;
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int err;
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retv = dlpi_promiscon(pd->dlpi_hd, level);
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if (retv != DLPI_SUCCESS) {
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if (retv == DL_SYSERR &&
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(errno == EPERM || errno == EACCES)) {
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if (level == DL_PROMISC_PHYS) {
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err = PCAP_ERROR_PROMISC_PERM_DENIED;
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snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
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"Attempt to set promiscuous mode failed with %s - root privilege may be required",
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(errno == EPERM) ? "EPERM" : "EACCES");
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} else {
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err = PCAP_ERROR_PERM_DENIED;
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snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
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"Attempt to set %s mode failed with %s - root privilege may be required",
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(level == DL_PROMISC_MULTI) ? "multicast" : "SAP promiscuous",
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(errno == EPERM) ? "EPERM" : "EACCES");
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}
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} else {
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err = PCAP_ERROR;
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pcap_libdlpi_err(p->opt.device,
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"dlpi_promiscon" STRINGIFY(level),
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retv, p->errbuf);
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}
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return (err);
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}
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return (0);
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}
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/*
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* Presumably everything returned by dlpi_walk() is a DLPI device,
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* so there's no work to be done here to check whether name refers
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* to a DLPI device.
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*/
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static int
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is_dlpi_interface(const char *name _U_)
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{
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return (1);
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}
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static int
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get_if_flags(const char *name _U_, bpf_u_int32 *flags _U_, char *errbuf _U_)
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{
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/*
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* Nothing we can do other than mark loopback devices as "the
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* connected/disconnected status doesn't apply".
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*
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* XXX - on Solaris, can we do what the dladm command does,
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* i.e. get a connected/disconnected indication from a kstat?
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* (Note that you can also get the link speed, and possibly
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* other information, from a kstat as well.)
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*/
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if (*flags & PCAP_IF_LOOPBACK) {
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/*
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* Loopback devices aren't wireless, and "connected"/
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* "disconnected" doesn't apply to them.
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*/
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*flags |= PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE;
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return (0);
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}
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return (0);
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}
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/*
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* In Solaris, the "standard" mechanism" i.e SIOCGLIFCONF will only find
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* network links that are plumbed and are up. dlpi_walk(3DLPI) will find
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* additional network links present in the system.
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*/
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int
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pcap_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf)
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{
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int retv = 0;
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linknamelist_t *entry, *next;
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linkwalk_t lw = {NULL, 0};
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int save_errno;
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/*
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* Get the list of regular interfaces first.
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*/
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if (pcap_findalldevs_interfaces(devlistp, errbuf,
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is_dlpi_interface, get_if_flags) == -1)
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return (-1); /* failure */
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/* dlpi_walk() for loopback will be added here. */
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/*
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* Find all DLPI devices in the current zone.
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*
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* XXX - will pcap_findalldevs_interfaces() find any devices
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* outside the current zone? If not, the only reason to call
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* it would be to get the interface addresses.
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*/
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dlpi_walk(list_interfaces, &lw, 0);
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if (lw.lw_err != 0) {
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pcap_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
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lw.lw_err, "dlpi_walk");
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retv = -1;
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goto done;
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}
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/* Add linkname if it does not exist on the list. */
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for (entry = lw.lw_list; entry != NULL; entry = entry->lnl_next) {
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/*
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* If it isn't already in the list of devices, try to
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* add it.
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*/
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if (find_or_add_dev(devlistp, entry->linkname, 0, get_if_flags,
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NULL, errbuf) == NULL)
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retv = -1;
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}
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done:
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save_errno = errno;
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for (entry = lw.lw_list; entry != NULL; entry = next) {
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next = entry->lnl_next;
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free(entry);
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}
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errno = save_errno;
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return (retv);
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}
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/*
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* Read data received on DLPI handle. Returns -2 if told to terminate, else
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* returns the number of packets read.
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*/
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static int
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pcap_read_libdlpi(pcap_t *p, int count, pcap_handler callback, u_char *user)
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{
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struct pcap_dlpi *pd = p->priv;
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int len;
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u_char *bufp;
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size_t msglen;
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int retv;
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len = p->cc;
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if (len != 0) {
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bufp = p->bp;
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goto process_pkts;
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}
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do {
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/* Has "pcap_breakloop()" been called? */
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if (p->break_loop) {
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/*
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* Yes - clear the flag that indicates that it has,
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* and return -2 to indicate that we were told to
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* break out of the loop.
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*/
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p->break_loop = 0;
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return (-2);
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}
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msglen = p->bufsize;
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bufp = (u_char *)p->buffer + p->offset;
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retv = dlpi_recv(pd->dlpi_hd, NULL, NULL, bufp,
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&msglen, -1, NULL);
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if (retv != DLPI_SUCCESS) {
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/*
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* This is most likely a call to terminate out of the
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* loop. So, do not return an error message, instead
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* check if "pcap_breakloop()" has been called above.
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*/
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if (retv == DL_SYSERR && errno == EINTR) {
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len = 0;
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continue;
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}
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pcap_libdlpi_err(dlpi_linkname(pd->dlpi_hd),
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"dlpi_recv", retv, p->errbuf);
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return (-1);
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}
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len = msglen;
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} while (len == 0);
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process_pkts:
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return (pcap_process_pkts(p, callback, user, count, bufp, len));
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}
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static int
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pcap_inject_libdlpi(pcap_t *p, const void *buf, int size)
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{
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struct pcap_dlpi *pd = p->priv;
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int retv;
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retv = dlpi_send(pd->dlpi_hd, NULL, 0, buf, size, NULL);
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if (retv != DLPI_SUCCESS) {
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pcap_libdlpi_err(dlpi_linkname(pd->dlpi_hd), "dlpi_send", retv,
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p->errbuf);
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return (-1);
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}
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/*
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* dlpi_send(3DLPI) does not provide a way to return the number of
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* bytes sent on the wire. Based on the fact that DLPI_SUCCESS was
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* returned we are assuming 'size' bytes were sent.
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*/
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return (size);
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}
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/*
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* Close dlpi handle.
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*/
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static void
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pcap_cleanup_libdlpi(pcap_t *p)
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{
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struct pcap_dlpi *pd = p->priv;
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if (pd->dlpi_hd != NULL) {
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dlpi_close(pd->dlpi_hd);
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pd->dlpi_hd = NULL;
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p->fd = -1;
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}
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pcap_cleanup_live_common(p);
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}
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/*
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* Write error message to buffer.
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*/
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static void
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pcap_libdlpi_err(const char *linkname, const char *func, int err, char *errbuf)
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{
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snprintf(errbuf, PCAP_ERRBUF_SIZE, "libpcap: %s failed on %s: %s",
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func, linkname, dlpi_strerror(err));
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}
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pcap_t *
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pcap_create_interface(const char *device _U_, char *ebuf)
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{
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pcap_t *p;
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|
|
p = PCAP_CREATE_COMMON(ebuf, struct pcap_dlpi);
|
|
if (p == NULL)
|
|
return (NULL);
|
|
|
|
p->activate_op = pcap_activate_libdlpi;
|
|
return (p);
|
|
}
|
|
|
|
/*
|
|
* Libpcap version string.
|
|
*/
|
|
const char *
|
|
pcap_lib_version(void)
|
|
{
|
|
return (PCAP_VERSION_STRING);
|
|
}
|