2 * Copyright (c) 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
21 * This code contributed by Sagun Shakya (sagun.shakya@sun.com)
24 * Packet capture routines for DLPI using libdlpi under SunOS 5.11.
28 static const char rcsid[] _U_ =
29 "@(#) $Header: /tcpdump/master/libpcap/pcap-libdlpi.c,v 1.6 2008-04-14 20:40:58 guy Exp $ (LBL)";
36 #include <sys/types.h>
38 #include <sys/bufmod.h>
39 #include <sys/stream.h>
52 static int dlpromiscon(pcap_t *, bpf_u_int32);
53 static int pcap_read_libdlpi(pcap_t *, int, pcap_handler, u_char *);
54 static int pcap_inject_libdlpi(pcap_t *, const void *, size_t);
55 static void pcap_close_libdlpi(pcap_t *);
56 static void pcap_libdlpi_err(const char *, const char *, int, char *);
57 static void pcap_cleanup_libdlpi(pcap_t *);
60 * list_interfaces() will list all the network links that are
61 * available on a system.
63 static boolean_t list_interfaces(const char *, void *);
65 typedef struct linknamelist {
66 char linkname[DLPI_LINKNAME_MAX];
67 struct linknamelist *lnl_next;
70 typedef struct linkwalk {
71 linknamelist_t *lw_list;
76 * The caller of this function should free the memory allocated
77 * for each linknamelist_t "entry" allocated.
80 list_interfaces(const char *linkname, void *arg)
82 linkwalk_t *lwp = arg;
83 linknamelist_t *entry;
85 if ((entry = calloc(1, sizeof(linknamelist_t))) == NULL) {
89 (void) strlcpy(entry->linkname, linkname, DLPI_LINKNAME_MAX);
91 if (lwp->lw_list == NULL) {
94 entry->lnl_next = lwp->lw_list;
102 pcap_activate_libdlpi(pcap_t *p)
107 int err = PCAP_ERROR;
110 * Enable Solaris raw and passive DLPI extensions;
111 * dlpi_open() will not fail if the underlying link does not support
112 * passive mode. See dlpi(7P) for details.
114 retv = dlpi_open(p->opt.source, &dh, DLPI_RAW|DLPI_PASSIVE);
115 if (retv != DLPI_SUCCESS) {
116 if (retv == DLPI_ELINKNAMEINVAL || retv == DLPI_ENOLINK)
117 err = PCAP_ERROR_NO_SUCH_DEVICE;
118 else if (retv == DL_SYSERR &&
119 (errno == EPERM || errno == EACCES))
120 err = PCAP_ERROR_PERM_DENIED;
121 pcap_libdlpi_err(p->opt.source, "dlpi_open", retv,
129 * This device exists, but we don't support monitor mode
130 * any platforms that support DLPI.
132 err = PCAP_ERROR_RFMON_NOTSUP;
136 /* Bind with DLPI_ANY_SAP. */
137 if ((retv = dlpi_bind(p->dlpi_hd, DLPI_ANY_SAP, 0)) != DLPI_SUCCESS) {
138 pcap_libdlpi_err(p->opt.source, "dlpi_bind", retv, p->errbuf);
142 /* Enable promiscuous mode. */
143 if (p->opt.promisc) {
144 err = dlpromiscon(p, DL_PROMISC_PHYS);
147 * "You don't have permission to capture on
148 * this device" and "you don't have permission
149 * to capture in promiscuous mode on this
150 * device" are different; let the user know,
151 * so if they can't get permission to
152 * capture in promiscuous mode, they can at
153 * least try to capture in non-promiscuous
156 * XXX - you might have to capture in
157 * promiscuous mode to see outgoing packets.
159 if (err == PCAP_ERROR_PERM_DENIED)
160 err = PCAP_ERROR_PROMISC_PERM_DENIED;
164 /* Try to enable multicast. */
165 err = dlpromiscon(p, DL_PROMISC_MULTI);
170 /* Try to enable SAP promiscuity. */
171 err = dlpromiscon(p, DL_PROMISC_SAP);
174 * Not fatal, since the DL_PROMISC_PHYS mode worked.
175 * Report it as a warning, however.
183 /* Determine link type. */
184 if ((retv = dlpi_info(p->dlpi_hd, &dlinfo, 0)) != DLPI_SUCCESS) {
185 pcap_libdlpi_err(p->opt.source, "dlpi_info", retv, p->errbuf);
189 if (pcap_process_mactype(p, dlinfo.di_mactype) != 0)
192 p->fd = dlpi_fd(p->dlpi_hd);
194 /* Push and configure bufmod. */
195 if (pcap_conf_bufmod(p, p->snapshot, p->md.timeout) != 0)
199 * Flush the read side.
201 if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
202 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "FLUSHR: %s",
203 pcap_strerror(errno));
207 /* Allocate data buffer. */
208 if (pcap_alloc_databuf(p) != 0)
212 * "p->fd" is a FD for a STREAMS device, so "select()" and
213 * "poll()" should work on it.
215 p->selectable_fd = p->fd;
217 p->read_op = pcap_read_libdlpi;
218 p->inject_op = pcap_inject_libdlpi;
219 p->setfilter_op = install_bpf_program; /* No kernel filtering */
220 p->setdirection_op = NULL; /* Not implemented */
221 p->set_datalink_op = NULL; /* Can't change data link type */
222 p->getnonblock_op = pcap_getnonblock_fd;
223 p->setnonblock_op = pcap_setnonblock_fd;
224 p->stats_op = pcap_stats_dlpi;
225 p->cleanup_op = pcap_cleanup_libdlpi;
229 pcap_cleanup_libdlpi(p);
233 #define STRINGIFY(n) #n
236 dlpromiscon(pcap_t *p, bpf_u_int32 level)
240 retv = dlpi_promiscon(p->dlpi_hd, level);
241 if (retv != DLPI_SUCCESS) {
242 if (retv == DL_SYSERR &&
243 (errno == EPERM || errno == EACCES))
244 err = PCAP_ERROR_PERM_DENIED;
247 pcap_libdlpi_err(p->opt.source, "dlpi_promiscon" STRINGIFY(level),
255 * In Solaris, the "standard" mechanism" i.e SIOCGLIFCONF will only find
256 * network links that are plumbed and are up. dlpi_walk(3DLPI) will find
257 * additional network links present in the system.
260 pcap_platform_finddevs(pcap_if_t **alldevsp, char *errbuf)
264 linknamelist_t *entry, *next;
265 linkwalk_t lw = {NULL, 0};
268 /* dlpi_walk() for loopback will be added here. */
270 dlpi_walk(list_interfaces, &lw, 0);
272 if (lw.lw_err != 0) {
273 snprintf(errbuf, PCAP_ERRBUF_SIZE,
274 "dlpi_walk: %s", pcap_strerror(lw.lw_err));
279 /* Add linkname if it does not exist on the list. */
280 for (entry = lw.lw_list; entry != NULL; entry = entry->lnl_next) {
281 if (pcap_add_if(alldevsp, entry->linkname, 0, NULL, errbuf) < 0)
286 for (entry = lw.lw_list; entry != NULL; entry = next) {
287 next = entry->lnl_next;
296 * Read data received on DLPI handle. Returns -2 if told to terminate, else
297 * returns the number of packets read.
300 pcap_read_libdlpi(pcap_t *p, int count, pcap_handler callback, u_char *user)
313 /* Has "pcap_breakloop()" been called? */
316 * Yes - clear the flag that indicates that it has,
317 * and return -2 to indicate that we were told to
318 * break out of the loop.
325 bufp = p->buffer + p->offset;
327 retv = dlpi_recv(p->dlpi_hd, NULL, NULL, bufp,
329 if (retv != DLPI_SUCCESS) {
331 * This is most likely a call to terminate out of the
332 * loop. So, do not return an error message, instead
333 * check if "pcap_breakloop()" has been called above.
335 if (retv == DL_SYSERR && errno == EINTR) {
339 pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd),
340 "dlpi_recv", retv, p->errbuf);
347 return (pcap_process_pkts(p, callback, user, count, bufp, len));
351 pcap_inject_libdlpi(pcap_t *p, const void *buf, size_t size)
355 retv = dlpi_send(p->dlpi_hd, NULL, 0, buf, size, NULL);
356 if (retv != DLPI_SUCCESS) {
357 pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd), "dlpi_send", retv,
362 * dlpi_send(3DLPI) does not provide a way to return the number of
363 * bytes sent on the wire. Based on the fact that DLPI_SUCCESS was
364 * returned we are assuming 'size' bytes were sent.
373 pcap_cleanup_libdlpi(pcap_t *p)
375 if (p->dlpi_hd != NULL) {
376 dlpi_close(p->dlpi_hd);
380 pcap_cleanup_live_common(p);
384 * Write error message to buffer.
387 pcap_libdlpi_err(const char *linkname, const char *func, int err, char *errbuf)
389 snprintf(errbuf, PCAP_ERRBUF_SIZE, "libpcap: %s failed on %s: %s",
390 func, linkname, dlpi_strerror(err));
394 pcap_create_interface(const char *device, char *ebuf)
398 p = pcap_create_common(device, ebuf);
402 p->activate_op = pcap_activate_libdlpi;