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 pcap_read_libdlpi(pcap_t *, int, pcap_handler, u_char *);
53 static int pcap_inject_libdlpi(pcap_t *, const void *, size_t);
54 static void pcap_close_libdlpi(pcap_t *);
55 static void pcap_libdlpi_err(const char *, const char *, int, char *);
56 static void pcap_cleanup_libdlpi(pcap_t *);
59 * list_interfaces() will list all the network links that are
60 * available on a system.
62 static boolean_t list_interfaces(const char *, void *);
64 typedef struct linknamelist {
65 char linkname[DLPI_LINKNAME_MAX];
66 struct linknamelist *lnl_next;
69 typedef struct linkwalk {
70 linknamelist_t *lw_list;
75 * The caller of this function should free the memory allocated
76 * for each linknamelist_t "entry" allocated.
79 list_interfaces(const char *linkname, void *arg)
81 linkwalk_t *lwp = arg;
82 linknamelist_t *entry;
84 if ((entry = calloc(1, sizeof(linknamelist_t))) == NULL) {
88 (void) strlcpy(entry->linkname, linkname, DLPI_LINKNAME_MAX);
90 if (lwp->lw_list == NULL) {
93 entry->lnl_next = lwp->lw_list;
101 pcap_activate_libdlpi(pcap_t *p)
106 int err = PCAP_ERROR;
109 * Enable Solaris raw and passive DLPI extensions;
110 * dlpi_open() will not fail if the underlying link does not support
111 * passive mode. See dlpi(7P) for details.
113 retv = dlpi_open(p->opt.source, &dh, DLPI_RAW|DLPI_PASSIVE);
114 if (retv != DLPI_SUCCESS) {
115 if (retv == DLPI_ELINKNAMEINVAL || retv == DLPI_ENOLINK)
116 err = PCAP_ERROR_NO_SUCH_DEVICE;
117 else if (retv == DL_SYSERR && errno == EACCES)
118 err = PCAP_ERROR_PERM_DENIED;
119 pcap_libdlpi_err(p->opt.source, "dlpi_open", retv,
127 * This device exists, but we don't support monitor mode
128 * any platforms that support DLPI.
130 err = PCAP_ERROR_RFMON_NOTSUP;
134 /* Bind with DLPI_ANY_SAP. */
135 if ((retv = dlpi_bind(p->dlpi_hd, DLPI_ANY_SAP, 0)) != DLPI_SUCCESS) {
136 pcap_libdlpi_err(p->opt.source, "dlpi_bind", retv, p->errbuf);
140 /* Enable promiscuous mode. */
141 if (p->opt.promisc) {
142 retv = dlpi_promiscon(p->dlpi_hd, DL_PROMISC_PHYS);
143 if (retv != DLPI_SUCCESS) {
144 pcap_libdlpi_err(p->opt.source,
145 "dlpi_promisc(PHYSICAL)", retv, p->errbuf);
149 /* Try to enable multicast. */
150 retv = dlpi_promiscon(p->dlpi_hd, DL_PROMISC_MULTI);
151 if (retv != DLPI_SUCCESS) {
152 pcap_libdlpi_err(p->opt.source, "dlpi_promisc(MULTI)",
158 /* Try to enable SAP promiscuity. */
159 retv = dlpi_promiscon(p->dlpi_hd, DL_PROMISC_SAP);
160 if (retv != DLPI_SUCCESS) {
161 if (p->opt.promisc) {
162 pcap_libdlpi_err(p->opt.source, "dlpi_promisc(SAP)",
167 /* Not fatal, since the DL_PROMISC_PHYS mode worked. */
168 fprintf(stderr, "WARNING: dlpi_promisc(SAP) failed on"
169 " %s:(%s)\n", p->opt.source, dlpi_strerror(retv));
172 /* Determine link type. */
173 if ((retv = dlpi_info(p->dlpi_hd, &dlinfo, 0)) != DLPI_SUCCESS) {
174 pcap_libdlpi_err(p->opt.source, "dlpi_info", retv, p->errbuf);
178 if (pcap_process_mactype(p, dlinfo.di_mactype) != 0)
181 p->fd = dlpi_fd(p->dlpi_hd);
183 /* Push and configure bufmod. */
184 if (pcap_conf_bufmod(p, p->snapshot, p->md.timeout) != 0)
188 * Flush the read side.
190 if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
191 snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "FLUSHR: %s",
192 pcap_strerror(errno));
196 /* Allocate data buffer. */
197 if (pcap_alloc_databuf(p) != 0)
201 * "p->fd" is a FD for a STREAMS device, so "select()" and
202 * "poll()" should work on it.
204 p->selectable_fd = p->fd;
206 p->read_op = pcap_read_libdlpi;
207 p->inject_op = pcap_inject_libdlpi;
208 p->setfilter_op = install_bpf_program; /* No kernel filtering */
209 p->setdirection_op = NULL; /* Not implemented */
210 p->set_datalink_op = NULL; /* Can't change data link type */
211 p->getnonblock_op = pcap_getnonblock_fd;
212 p->setnonblock_op = pcap_setnonblock_fd;
213 p->stats_op = pcap_stats_dlpi;
214 p->cleanup_op = pcap_cleanup_libdlpi;
218 pcap_cleanup_libdlpi(p);
223 * In Solaris, the "standard" mechanism" i.e SIOCGLIFCONF will only find
224 * network links that are plumbed and are up. dlpi_walk(3DLPI) will find
225 * additional network links present in the system.
228 pcap_platform_finddevs(pcap_if_t **alldevsp, char *errbuf)
232 linknamelist_t *entry, *next;
233 linkwalk_t lw = {NULL, 0};
236 /* dlpi_walk() for loopback will be added here. */
238 dlpi_walk(list_interfaces, &lw, 0);
240 if (lw.lw_err != 0) {
241 snprintf(errbuf, PCAP_ERRBUF_SIZE,
242 "dlpi_walk: %s", pcap_strerror(lw.lw_err));
247 /* Add linkname if it does not exist on the list. */
248 for (entry = lw.lw_list; entry != NULL; entry = entry->lnl_next) {
249 if (pcap_add_if(alldevsp, entry->linkname, 0, NULL, errbuf) < 0)
254 for (entry = lw.lw_list; entry != NULL; entry = next) {
255 next = entry->lnl_next;
264 * Read data received on DLPI handle. Returns -2 if told to terminate, else
265 * returns the number of packets read.
268 pcap_read_libdlpi(pcap_t *p, int count, pcap_handler callback, u_char *user)
281 /* Has "pcap_breakloop()" been called? */
284 * Yes - clear the flag that indicates that it has,
285 * and return -2 to indicate that we were told to
286 * break out of the loop.
293 bufp = p->buffer + p->offset;
295 retv = dlpi_recv(p->dlpi_hd, NULL, NULL, bufp,
297 if (retv != DLPI_SUCCESS) {
299 * This is most likely a call to terminate out of the
300 * loop. So, do not return an error message, instead
301 * check if "pcap_breakloop()" has been called above.
303 if (retv == DL_SYSERR && errno == EINTR) {
307 pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd),
308 "dlpi_recv", retv, p->errbuf);
315 return (pcap_process_pkts(p, callback, user, count, bufp, len));
319 pcap_inject_libdlpi(pcap_t *p, const void *buf, size_t size)
323 retv = dlpi_send(p->dlpi_hd, NULL, 0, buf, size, NULL);
324 if (retv != DLPI_SUCCESS) {
325 pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd), "dlpi_send", retv,
330 * dlpi_send(3DLPI) does not provide a way to return the number of
331 * bytes sent on the wire. Based on the fact that DLPI_SUCCESS was
332 * returned we are assuming 'size' bytes were sent.
341 pcap_cleanup_libdlpi(pcap_t *p)
343 if (p->dlpi_hd != NULL) {
344 dlpi_close(p->dlpi_hd);
348 pcap_cleanup_live_common(p);
352 * Write error message to buffer.
355 pcap_libdlpi_err(const char *linkname, const char *func, int err, char *errbuf)
357 snprintf(errbuf, PCAP_ERRBUF_SIZE, "libpcap: %s failed on %s: %s",
358 func, linkname, dlpi_strerror(err));
362 pcap_create(const char *device, char *ebuf)
366 p = pcap_create_common(device, ebuf);
370 p->activate_op = pcap_activate_libdlpi;