1190214Srpaulo/* 2190214Srpaulo * Copyright (c) 1993, 1994, 1995, 1996, 1997 3190214Srpaulo * The Regents of the University of California. All rights reserved. 4190214Srpaulo * 5190214Srpaulo * Redistribution and use in source and binary forms, with or without 6190214Srpaulo * modification, are permitted provided that: (1) source code distributions 7190214Srpaulo * retain the above copyright notice and this paragraph in its entirety, (2) 8190214Srpaulo * distributions including binary code include the above copyright notice and 9190214Srpaulo * this paragraph in its entirety in the documentation or other materials 10190214Srpaulo * provided with the distribution, and (3) all advertising materials mentioning 11190214Srpaulo * features or use of this software display the following acknowledgement: 12190214Srpaulo * ``This product includes software developed by the University of California, 13190214Srpaulo * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of 14190214Srpaulo * the University nor the names of its contributors may be used to endorse 15190214Srpaulo * or promote products derived from this software without specific prior 16190214Srpaulo * written permission. 17190214Srpaulo * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED 18190214Srpaulo * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF 19190214Srpaulo * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 20190214Srpaulo * 21190214Srpaulo * This code contributed by Sagun Shakya (sagun.shakya@sun.com) 22190214Srpaulo */ 23190214Srpaulo/* 24190214Srpaulo * Packet capture routines for DLPI using libdlpi under SunOS 5.11. 25190214Srpaulo */ 26190214Srpaulo 27190214Srpaulo#ifndef lint 28190214Srpaulostatic const char rcsid[] _U_ = 29214518Srpaulo "@(#) $Header: /tcpdump/master/libpcap/pcap-libdlpi.c,v 1.6 2008-04-14 20:40:58 guy Exp $ (LBL)"; 30190214Srpaulo#endif 31190214Srpaulo 32190214Srpaulo#ifdef HAVE_CONFIG_H 33190214Srpaulo#include "config.h" 34190214Srpaulo#endif 35190214Srpaulo 36190214Srpaulo#include <sys/types.h> 37190214Srpaulo#include <sys/time.h> 38190214Srpaulo#include <sys/bufmod.h> 39190214Srpaulo#include <sys/stream.h> 40190214Srpaulo#include <libdlpi.h> 41190214Srpaulo#include <errno.h> 42190214Srpaulo#include <memory.h> 43190214Srpaulo#include <stropts.h> 44190214Srpaulo#include <stdio.h> 45190214Srpaulo#include <stdlib.h> 46190214Srpaulo#include <string.h> 47190214Srpaulo 48190214Srpaulo#include "pcap-int.h" 49190214Srpaulo#include "dlpisubs.h" 50190214Srpaulo 51190214Srpaulo/* Forwards. */ 52235426Sdelphijstatic int dlpromiscon(pcap_t *, bpf_u_int32); 53190214Srpaulostatic int pcap_read_libdlpi(pcap_t *, int, pcap_handler, u_char *); 54190214Srpaulostatic int pcap_inject_libdlpi(pcap_t *, const void *, size_t); 55190214Srpaulostatic void pcap_close_libdlpi(pcap_t *); 56190214Srpaulostatic void pcap_libdlpi_err(const char *, const char *, int, char *); 57214518Srpaulostatic void pcap_cleanup_libdlpi(pcap_t *); 58190214Srpaulo 59190214Srpaulo/* 60190214Srpaulo * list_interfaces() will list all the network links that are 61190214Srpaulo * available on a system. 62190214Srpaulo */ 63190214Srpaulostatic boolean_t list_interfaces(const char *, void *); 64190214Srpaulo 65190214Srpaulotypedef struct linknamelist { 66190214Srpaulo char linkname[DLPI_LINKNAME_MAX]; 67190214Srpaulo struct linknamelist *lnl_next; 68190214Srpaulo} linknamelist_t; 69190214Srpaulo 70190214Srpaulotypedef struct linkwalk { 71190214Srpaulo linknamelist_t *lw_list; 72190214Srpaulo int lw_err; 73190214Srpaulo} linkwalk_t; 74190214Srpaulo 75190214Srpaulo/* 76190214Srpaulo * The caller of this function should free the memory allocated 77190214Srpaulo * for each linknamelist_t "entry" allocated. 78190214Srpaulo */ 79190214Srpaulostatic boolean_t 80190214Srpaulolist_interfaces(const char *linkname, void *arg) 81190214Srpaulo{ 82190214Srpaulo linkwalk_t *lwp = arg; 83190214Srpaulo linknamelist_t *entry; 84190214Srpaulo 85190214Srpaulo if ((entry = calloc(1, sizeof(linknamelist_t))) == NULL) { 86190214Srpaulo lwp->lw_err = ENOMEM; 87190214Srpaulo return (B_TRUE); 88190214Srpaulo } 89190214Srpaulo (void) strlcpy(entry->linkname, linkname, DLPI_LINKNAME_MAX); 90190214Srpaulo 91190214Srpaulo if (lwp->lw_list == NULL) { 92190214Srpaulo lwp->lw_list = entry; 93190214Srpaulo } else { 94190214Srpaulo entry->lnl_next = lwp->lw_list; 95190214Srpaulo lwp->lw_list = entry; 96190214Srpaulo } 97190214Srpaulo 98190214Srpaulo return (B_FALSE); 99190214Srpaulo} 100190214Srpaulo 101190214Srpaulostatic int 102190214Srpaulopcap_activate_libdlpi(pcap_t *p) 103190214Srpaulo{ 104190214Srpaulo int retv; 105190214Srpaulo dlpi_handle_t dh; 106190214Srpaulo dlpi_info_t dlinfo; 107190214Srpaulo int err = PCAP_ERROR; 108190214Srpaulo 109190214Srpaulo /* 110190214Srpaulo * Enable Solaris raw and passive DLPI extensions; 111190214Srpaulo * dlpi_open() will not fail if the underlying link does not support 112190214Srpaulo * passive mode. See dlpi(7P) for details. 113190214Srpaulo */ 114190214Srpaulo retv = dlpi_open(p->opt.source, &dh, DLPI_RAW|DLPI_PASSIVE); 115190214Srpaulo if (retv != DLPI_SUCCESS) { 116190214Srpaulo if (retv == DLPI_ELINKNAMEINVAL || retv == DLPI_ENOLINK) 117190214Srpaulo err = PCAP_ERROR_NO_SUCH_DEVICE; 118235426Sdelphij else if (retv == DL_SYSERR && 119235426Sdelphij (errno == EPERM || errno == EACCES)) 120190214Srpaulo err = PCAP_ERROR_PERM_DENIED; 121190214Srpaulo pcap_libdlpi_err(p->opt.source, "dlpi_open", retv, 122190214Srpaulo p->errbuf); 123190214Srpaulo return (err); 124190214Srpaulo } 125190214Srpaulo p->dlpi_hd = dh; 126190214Srpaulo 127190214Srpaulo if (p->opt.rfmon) { 128190214Srpaulo /* 129190214Srpaulo * This device exists, but we don't support monitor mode 130190214Srpaulo * any platforms that support DLPI. 131190214Srpaulo */ 132190214Srpaulo err = PCAP_ERROR_RFMON_NOTSUP; 133190214Srpaulo goto bad; 134190214Srpaulo } 135190214Srpaulo 136190214Srpaulo /* Bind with DLPI_ANY_SAP. */ 137190214Srpaulo if ((retv = dlpi_bind(p->dlpi_hd, DLPI_ANY_SAP, 0)) != DLPI_SUCCESS) { 138190214Srpaulo pcap_libdlpi_err(p->opt.source, "dlpi_bind", retv, p->errbuf); 139190214Srpaulo goto bad; 140190214Srpaulo } 141190214Srpaulo 142190214Srpaulo /* Enable promiscuous mode. */ 143190214Srpaulo if (p->opt.promisc) { 144235426Sdelphij err = dlpromiscon(p, DL_PROMISC_PHYS); 145235426Sdelphij if (err < 0) { 146235426Sdelphij /* 147235426Sdelphij * "You don't have permission to capture on 148235426Sdelphij * this device" and "you don't have permission 149235426Sdelphij * to capture in promiscuous mode on this 150235426Sdelphij * device" are different; let the user know, 151235426Sdelphij * so if they can't get permission to 152235426Sdelphij * capture in promiscuous mode, they can at 153235426Sdelphij * least try to capture in non-promiscuous 154235426Sdelphij * mode. 155235426Sdelphij * 156235426Sdelphij * XXX - you might have to capture in 157235426Sdelphij * promiscuous mode to see outgoing packets. 158235426Sdelphij */ 159235426Sdelphij if (err == PCAP_ERROR_PERM_DENIED) 160235426Sdelphij err = PCAP_ERROR_PROMISC_PERM_DENIED; 161190214Srpaulo goto bad; 162190214Srpaulo } 163190214Srpaulo } else { 164190214Srpaulo /* Try to enable multicast. */ 165235426Sdelphij err = dlpromiscon(p, DL_PROMISC_MULTI); 166235426Sdelphij if (err < 0) 167190214Srpaulo goto bad; 168190214Srpaulo } 169190214Srpaulo 170190214Srpaulo /* Try to enable SAP promiscuity. */ 171235426Sdelphij err = dlpromiscon(p, DL_PROMISC_SAP); 172235426Sdelphij if (err < 0) { 173235426Sdelphij /* 174235426Sdelphij * Not fatal, since the DL_PROMISC_PHYS mode worked. 175235426Sdelphij * Report it as a warning, however. 176235426Sdelphij */ 177235426Sdelphij if (p->opt.promisc) 178235426Sdelphij err = PCAP_WARNING; 179235426Sdelphij else 180190214Srpaulo goto bad; 181190214Srpaulo } 182190214Srpaulo 183190214Srpaulo /* Determine link type. */ 184190214Srpaulo if ((retv = dlpi_info(p->dlpi_hd, &dlinfo, 0)) != DLPI_SUCCESS) { 185190214Srpaulo pcap_libdlpi_err(p->opt.source, "dlpi_info", retv, p->errbuf); 186190214Srpaulo goto bad; 187190214Srpaulo } 188190214Srpaulo 189190214Srpaulo if (pcap_process_mactype(p, dlinfo.di_mactype) != 0) 190190214Srpaulo goto bad; 191190214Srpaulo 192190214Srpaulo p->fd = dlpi_fd(p->dlpi_hd); 193190214Srpaulo 194190214Srpaulo /* Push and configure bufmod. */ 195214518Srpaulo if (pcap_conf_bufmod(p, p->snapshot, p->md.timeout) != 0) 196190214Srpaulo goto bad; 197190214Srpaulo 198190214Srpaulo /* 199190214Srpaulo * Flush the read side. 200190214Srpaulo */ 201190214Srpaulo if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) { 202190214Srpaulo snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "FLUSHR: %s", 203190214Srpaulo pcap_strerror(errno)); 204190214Srpaulo goto bad; 205190214Srpaulo } 206190214Srpaulo 207190214Srpaulo /* Allocate data buffer. */ 208190214Srpaulo if (pcap_alloc_databuf(p) != 0) 209190214Srpaulo goto bad; 210190214Srpaulo 211190214Srpaulo /* 212190214Srpaulo * "p->fd" is a FD for a STREAMS device, so "select()" and 213190214Srpaulo * "poll()" should work on it. 214190214Srpaulo */ 215190214Srpaulo p->selectable_fd = p->fd; 216190214Srpaulo 217190214Srpaulo p->read_op = pcap_read_libdlpi; 218190214Srpaulo p->inject_op = pcap_inject_libdlpi; 219190214Srpaulo p->setfilter_op = install_bpf_program; /* No kernel filtering */ 220190214Srpaulo p->setdirection_op = NULL; /* Not implemented */ 221190214Srpaulo p->set_datalink_op = NULL; /* Can't change data link type */ 222190214Srpaulo p->getnonblock_op = pcap_getnonblock_fd; 223190214Srpaulo p->setnonblock_op = pcap_setnonblock_fd; 224190214Srpaulo p->stats_op = pcap_stats_dlpi; 225190214Srpaulo p->cleanup_op = pcap_cleanup_libdlpi; 226190214Srpaulo 227190214Srpaulo return (0); 228190214Srpaulobad: 229190214Srpaulo pcap_cleanup_libdlpi(p); 230190214Srpaulo return (err); 231190214Srpaulo} 232190214Srpaulo 233235426Sdelphij#define STRINGIFY(n) #n 234235426Sdelphij 235235426Sdelphijstatic int 236235426Sdelphijdlpromiscon(pcap_t *p, bpf_u_int32 level) 237235426Sdelphij{ 238235426Sdelphij int err; 239235426Sdelphij 240251129Sdelphij retv = dlpi_promiscon(p->dlpi_hd, level); 241235426Sdelphij if (retv != DLPI_SUCCESS) { 242235426Sdelphij if (retv == DL_SYSERR && 243235426Sdelphij (errno == EPERM || errno == EACCES)) 244235426Sdelphij err = PCAP_ERROR_PERM_DENIED; 245235426Sdelphij else 246235426Sdelphij err = PCAP_ERROR; 247235426Sdelphij pcap_libdlpi_err(p->opt.source, "dlpi_promiscon" STRINGIFY(level), 248235426Sdelphij retv, p->errbuf); 249235426Sdelphij return (err); 250235426Sdelphij } 251235426Sdelphij return (0); 252235426Sdelphij} 253235426Sdelphij 254190214Srpaulo/* 255190214Srpaulo * In Solaris, the "standard" mechanism" i.e SIOCGLIFCONF will only find 256190214Srpaulo * network links that are plumbed and are up. dlpi_walk(3DLPI) will find 257190214Srpaulo * additional network links present in the system. 258190214Srpaulo */ 259190214Srpauloint 260190214Srpaulopcap_platform_finddevs(pcap_if_t **alldevsp, char *errbuf) 261190214Srpaulo{ 262190214Srpaulo int retv = 0; 263190214Srpaulo 264190214Srpaulo linknamelist_t *entry, *next; 265190214Srpaulo linkwalk_t lw = {NULL, 0}; 266190214Srpaulo int save_errno; 267190214Srpaulo 268190214Srpaulo /* dlpi_walk() for loopback will be added here. */ 269190214Srpaulo 270190214Srpaulo dlpi_walk(list_interfaces, &lw, 0); 271190214Srpaulo 272190214Srpaulo if (lw.lw_err != 0) { 273190214Srpaulo snprintf(errbuf, PCAP_ERRBUF_SIZE, 274190214Srpaulo "dlpi_walk: %s", pcap_strerror(lw.lw_err)); 275190214Srpaulo retv = -1; 276190214Srpaulo goto done; 277190214Srpaulo } 278190214Srpaulo 279190214Srpaulo /* Add linkname if it does not exist on the list. */ 280190214Srpaulo for (entry = lw.lw_list; entry != NULL; entry = entry->lnl_next) { 281190214Srpaulo if (pcap_add_if(alldevsp, entry->linkname, 0, NULL, errbuf) < 0) 282190214Srpaulo retv = -1; 283190214Srpaulo } 284190214Srpaulodone: 285190214Srpaulo save_errno = errno; 286190214Srpaulo for (entry = lw.lw_list; entry != NULL; entry = next) { 287190214Srpaulo next = entry->lnl_next; 288190214Srpaulo free(entry); 289190214Srpaulo } 290190214Srpaulo errno = save_errno; 291190214Srpaulo 292190214Srpaulo return (retv); 293190214Srpaulo} 294190214Srpaulo 295190214Srpaulo/* 296190214Srpaulo * Read data received on DLPI handle. Returns -2 if told to terminate, else 297190214Srpaulo * returns the number of packets read. 298190214Srpaulo */ 299190214Srpaulostatic int 300190214Srpaulopcap_read_libdlpi(pcap_t *p, int count, pcap_handler callback, u_char *user) 301190214Srpaulo{ 302190214Srpaulo int len; 303190214Srpaulo u_char *bufp; 304190214Srpaulo size_t msglen; 305190214Srpaulo int retv; 306190214Srpaulo 307190214Srpaulo len = p->cc; 308190214Srpaulo if (len != 0) { 309190214Srpaulo bufp = p->bp; 310190214Srpaulo goto process_pkts; 311190214Srpaulo } 312190214Srpaulo do { 313190214Srpaulo /* Has "pcap_breakloop()" been called? */ 314190214Srpaulo if (p->break_loop) { 315190214Srpaulo /* 316190214Srpaulo * Yes - clear the flag that indicates that it has, 317190214Srpaulo * and return -2 to indicate that we were told to 318190214Srpaulo * break out of the loop. 319190214Srpaulo */ 320190214Srpaulo p->break_loop = 0; 321190214Srpaulo return (-2); 322190214Srpaulo } 323190214Srpaulo 324190214Srpaulo msglen = p->bufsize; 325190214Srpaulo bufp = p->buffer + p->offset; 326190214Srpaulo 327190214Srpaulo retv = dlpi_recv(p->dlpi_hd, NULL, NULL, bufp, 328190214Srpaulo &msglen, -1, NULL); 329190214Srpaulo if (retv != DLPI_SUCCESS) { 330190214Srpaulo /* 331190214Srpaulo * This is most likely a call to terminate out of the 332190214Srpaulo * loop. So, do not return an error message, instead 333190214Srpaulo * check if "pcap_breakloop()" has been called above. 334190214Srpaulo */ 335190214Srpaulo if (retv == DL_SYSERR && errno == EINTR) { 336190214Srpaulo len = 0; 337190214Srpaulo continue; 338190214Srpaulo } 339190214Srpaulo pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd), 340190214Srpaulo "dlpi_recv", retv, p->errbuf); 341190214Srpaulo return (-1); 342190214Srpaulo } 343190214Srpaulo len = msglen; 344190214Srpaulo } while (len == 0); 345190214Srpaulo 346190214Srpauloprocess_pkts: 347190214Srpaulo return (pcap_process_pkts(p, callback, user, count, bufp, len)); 348190214Srpaulo} 349190214Srpaulo 350190214Srpaulostatic int 351190214Srpaulopcap_inject_libdlpi(pcap_t *p, const void *buf, size_t size) 352190214Srpaulo{ 353190214Srpaulo int retv; 354190214Srpaulo 355190214Srpaulo retv = dlpi_send(p->dlpi_hd, NULL, 0, buf, size, NULL); 356190214Srpaulo if (retv != DLPI_SUCCESS) { 357190214Srpaulo pcap_libdlpi_err(dlpi_linkname(p->dlpi_hd), "dlpi_send", retv, 358190214Srpaulo p->errbuf); 359190214Srpaulo return (-1); 360190214Srpaulo } 361190214Srpaulo /* 362190214Srpaulo * dlpi_send(3DLPI) does not provide a way to return the number of 363190214Srpaulo * bytes sent on the wire. Based on the fact that DLPI_SUCCESS was 364190214Srpaulo * returned we are assuming 'size' bytes were sent. 365190214Srpaulo */ 366190214Srpaulo return (size); 367190214Srpaulo} 368190214Srpaulo 369190214Srpaulo/* 370190214Srpaulo * Close dlpi handle. 371190214Srpaulo */ 372190214Srpaulostatic void 373190214Srpaulopcap_cleanup_libdlpi(pcap_t *p) 374190214Srpaulo{ 375190214Srpaulo if (p->dlpi_hd != NULL) { 376190214Srpaulo dlpi_close(p->dlpi_hd); 377190214Srpaulo p->dlpi_hd = NULL; 378190214Srpaulo p->fd = -1; 379190214Srpaulo } 380190214Srpaulo pcap_cleanup_live_common(p); 381190214Srpaulo} 382190214Srpaulo 383190214Srpaulo/* 384190214Srpaulo * Write error message to buffer. 385190214Srpaulo */ 386190214Srpaulostatic void 387190214Srpaulopcap_libdlpi_err(const char *linkname, const char *func, int err, char *errbuf) 388190214Srpaulo{ 389190214Srpaulo snprintf(errbuf, PCAP_ERRBUF_SIZE, "libpcap: %s failed on %s: %s", 390190214Srpaulo func, linkname, dlpi_strerror(err)); 391190214Srpaulo} 392190214Srpaulo 393190214Srpaulopcap_t * 394251129Sdelphijpcap_create_interface(const char *device, char *ebuf) 395190214Srpaulo{ 396190214Srpaulo pcap_t *p; 397190214Srpaulo 398190214Srpaulo p = pcap_create_common(device, ebuf); 399190214Srpaulo if (p == NULL) 400190214Srpaulo return (NULL); 401190214Srpaulo 402190214Srpaulo p->activate_op = pcap_activate_libdlpi; 403190214Srpaulo return (p); 404190214Srpaulo} 405