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- /* $Id$ */
- /*
- * Copyright (c) 2001-2010 Aaron Turner <aturner at synfin dot net>
- * Copyright (c) 2013-2024 Fred Klassen <tcpreplay at appneta dot com> - AppNeta
- *
- * The Tcpreplay Suite of tools is free software: you can redistribute it
- * and/or modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or with the authors permission any later version.
- *
- * The Tcpreplay Suite is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with the Tcpreplay Suite. If not, see <http://www.gnu.org/licenses/>.
- */
- #include "interface.h"
- #include "config.h"
- #include "common.h"
- #include <dirent.h>
- #include <stdlib.h>
- #include <string.h>
- #include <sys/ioctl.h>
- #include <unistd.h>
- /**
- * Method takes a user specified device name and returns
- * the canonical name for that device. This allows me to
- * create named interface aliases on platforms like Windows
- * which use horrifically long interface names
- *
- * Returns NULL on error
- */
- char *
- get_interface(interface_list_t *list, const char *alias)
- {
- interface_list_t *ptr;
- assert(alias);
- ptr = list;
- while (ptr) {
- /* check both the alias & name fields */
- if (strcmp(alias, ptr->alias) == 0 || strcmp(alias, ptr->name) == 0)
- return (ptr->name);
- ptr = ptr->next;
- }
- return (NULL);
- }
- /**
- * Get all available interfaces as an interface_list *
- */
- interface_list_t *
- get_interface_list(void)
- {
- interface_list_t *list_head, *list_ptr;
- char ebuf[PCAP_ERRBUF_SIZE], testnic[320];
- pcap_if_t *pcap_if, *pcap_if_ptr;
- int i = 0;
- DIR *dir;
- struct dirent *dirdata;
- #ifdef HAVE_NETMAP
- nmreq_t nmr;
- #endif
- #ifdef HAVE_NETMAP
- int netmap_version;
- #endif
- #ifndef HAVE_WIN32
- /* Unix just has a warning about being root */
- if (geteuid() != 0)
- warn("May need to run as root to get access to all network interfaces.");
- #endif
- #ifdef HAVE_NETMAP
- netmap_version = get_netmap_version();
- #endif
- if (pcap_findalldevs(&pcap_if, ebuf) < 0)
- errx(-1, "Error: %s", ebuf);
- pcap_if_ptr = pcap_if;
- list_head = (interface_list_t *)safe_malloc(sizeof(interface_list_t));
- list_ptr = list_head;
- while (pcap_if_ptr != NULL) {
- if (i > 0) {
- list_ptr->next = (interface_list_t *)safe_malloc(sizeof(interface_list_t));
- list_ptr = list_ptr->next;
- }
- strlcpy(list_ptr->name, pcap_if_ptr->name, sizeof(list_ptr->name));
- dbgx(3, "Adding %s to interface list", list_ptr->name);
- /* description is usually null under Unix */
- if (pcap_if_ptr->description != NULL)
- strlcpy(list_ptr->description, pcap_if_ptr->description, sizeof(list_ptr->description));
- sprintf(list_ptr->alias, "%%%d", i++);
- list_ptr->flags = pcap_if_ptr->flags;
- #ifdef HAVE_LIBPCAP_NETMAP
- /*
- * add the syntaxes supported by netmap-libpcap
- *
- * available at http://code.google.com/p/netmap-libpcap/
- */
- if (!(pcap_if_ptr->flags & PCAP_IF_LOOPBACK) && strcmp("any", pcap_if_ptr->name)) {
- #endif
- #ifdef HAVE_NETMAP
- int fd = -1;
- if (netmap_version != -1 && (fd = open("/dev/netmap", O_RDWR)) < 0)
- continue;
- bzero(&nmr, sizeof(nmr));
- strncpy(nmr.nr_name, pcap_if_ptr->name, sizeof(nmr.nr_name));
- nmr.nr_version = netmap_version;
- if (fd > 0 && ioctl(fd, NIOCGINFO, &nmr) == 0) {
- #endif /* HAVE_NETMAP */
- #if defined HAVE_LIBPCAP_NETMAP || defined HAVE_NETMAP
- list_ptr->next = (interface_list_t *)safe_malloc(sizeof(interface_list_t));
- list_ptr = list_ptr->next;
- snprintf(list_ptr->name, sizeof(list_ptr->name), "vale:%s", pcap_if_ptr->name);
- sprintf(list_ptr->alias, "%%%d", i++);
- list_ptr->flags = pcap_if_ptr->flags;
- list_ptr->next = (interface_list_t *)safe_malloc(sizeof(interface_list_t));
- list_ptr = list_ptr->next;
- snprintf(list_ptr->name, sizeof(list_ptr->name), "netmap:%s", pcap_if_ptr->name);
- sprintf(list_ptr->alias, "%%%d", i++);
- list_ptr->flags = pcap_if_ptr->flags;
- #endif /* HAVE_LIBPCAP_NETMAP || HAVE_NETMAP */
- #ifdef HAVE_NETMAP
- if (netmap_version >= 10) {
- int x;
- list_ptr->next = (interface_list_t *)safe_malloc(sizeof(interface_list_t));
- list_ptr = list_ptr->next;
- snprintf(list_ptr->name, sizeof(list_ptr->name), "netmap:%s!", pcap_if_ptr->name);
- sprintf(list_ptr->alias, "%%%d", i++);
- list_ptr->flags = pcap_if_ptr->flags;
- list_ptr->next = (interface_list_t *)safe_malloc(sizeof(interface_list_t));
- list_ptr = list_ptr->next;
- snprintf(list_ptr->name, sizeof(list_ptr->name), "netmap:%s*", pcap_if_ptr->name);
- sprintf(list_ptr->alias, "%%%d", i++);
- list_ptr->flags = pcap_if_ptr->flags;
- list_ptr->next = (interface_list_t *)safe_malloc(sizeof(interface_list_t));
- list_ptr = list_ptr->next;
- snprintf(list_ptr->name, sizeof(list_ptr->name), "netmap:%s^", pcap_if_ptr->name);
- sprintf(list_ptr->alias, "%%%d", i++);
- list_ptr->flags = pcap_if_ptr->flags;
- for (x = 0; x < nmr.nr_rx_rings; ++x) {
- list_ptr->next = (interface_list_t *)safe_malloc(sizeof(interface_list_t));
- list_ptr = list_ptr->next;
- snprintf(list_ptr->name, sizeof(list_ptr->name), "netmap:%s-%d", pcap_if_ptr->name, x);
- sprintf(list_ptr->alias, "%%%d", i++);
- list_ptr->flags = pcap_if_ptr->flags;
- }
- }
- }
- close(fd);
- #endif /* HAVE_NETMAP */
- #ifdef HAVE_LIBPCAP_NETMAP
- }
- #endif /* HAVE_LIBPCAP_NETMAP */
- #ifdef HAVE_PF_RING_PCAP
- list_ptr->next = (interface_list_t *)safe_malloc(sizeof(interface_list_t));
- list_ptr = list_ptr->next;
- snprintf(list_ptr->name, sizeof(list_ptr->name), "zc:%s", pcap_if_ptr->name);
- sprintf(list_ptr->alias, "%%%d", i++);
- list_ptr->flags = pcap_if_ptr->flags;
- #endif
- pcap_if_ptr = pcap_if_ptr->next;
- }
- pcap_freealldevs(pcap_if);
- /* look for khial device: https://github.com/boundary/khial */
- if ((dir = opendir("/dev/char")) != NULL) {
- while ((dirdata = readdir(dir)) != NULL) {
- if (strncmp(dirdata->d_name, "testpackets", strlen("testpackets")) == 0) {
- if (i > 0) {
- list_ptr->next = (interface_list_t *)safe_malloc(sizeof(interface_list_t));
- list_ptr = list_ptr->next;
- }
- dbgx(3, "Adding %s to interface list", dirdata->d_name);
- snprintf(testnic, sizeof(testnic), "/dev/char/%s", dirdata->d_name);
- strlcpy(list_ptr->name, testnic, sizeof(list_ptr->name));
- snprintf(testnic, sizeof(testnic), "khial pseudo-nic: %s", dirdata->d_name);
- strlcpy(list_ptr->description, testnic, sizeof(list_ptr->description));
- strlcpy(list_ptr->alias, dirdata->d_name, sizeof(list_ptr->alias));
- i += 1;
- }
- }
- closedir(dir);
- }
- dbg(1, "xxx get_interface_list end");
- return (list_head);
- }
- /**
- * Prints all the available interfaces found by get_interface_list()
- */
- void
- list_interfaces(interface_list_t *list)
- {
- interface_list_t *ptr;
- if (list == NULL) {
- printf("No network interfaces available");
- return;
- }
- printf("Available network interfaces:\n");
- #ifdef HAVE_WIN32 /* Win32 has alias/name/description */
- printf("Alias\tName\tDescription\n");
- #endif
- ptr = list;
- do {
- if (!(ptr->flags & PCAP_IF_LOOPBACK)) {
- #ifdef HAVE_WIN32
- printf("%s\t%s\n\t%s\n", ptr->alias, ptr->name, ptr->description);
- #else
- printf("%s\n", ptr->name);
- #endif
- }
- ptr = ptr->next;
- } while (ptr != NULL);
- }
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