From e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 10 Apr 2024 22:34:10 +0200 Subject: Adding upstream version 4.2.2. Signed-off-by: Daniel Baumann --- capture/capture_ifinfo.c | 359 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 359 insertions(+) create mode 100644 capture/capture_ifinfo.c (limited to 'capture/capture_ifinfo.c') diff --git a/capture/capture_ifinfo.c b/capture/capture_ifinfo.c new file mode 100644 index 00000000..45201b88 --- /dev/null +++ b/capture/capture_ifinfo.c @@ -0,0 +1,359 @@ +/* capture_ifinfo.c + * Routines for getting interface information from dumpcap + * + * Wireshark - Network traffic analyzer + * By Gerald Combs + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#include "config.h" +#define WS_LOG_DOMAIN LOG_DOMAIN_CAPTURE + +#ifdef HAVE_LIBPCAP + +#include + +#include +#include + +#include "capture_opts.h" + +#include "capture/capture_session.h" +#include "capture/capture_sync.h" +#include "extcap.h" + +#include +#include + +#ifdef HAVE_PCAP_REMOTE +static GList *remote_interface_list = NULL; + +static GList * append_remote_list(GList *iflist) +{ + GSList *list; + GList *rlist; + if_addr_t *if_addr, *temp_addr; + if_info_t *if_info, *temp; + + for (rlist = g_list_nth(remote_interface_list, 0); rlist != NULL; rlist = g_list_next(rlist)) { + if_info = (if_info_t *)rlist->data; + temp = g_new0(if_info_t, 1); + temp->name = g_strdup(if_info->name); + temp->friendly_name = g_strdup(if_info->friendly_name); + temp->vendor_description = g_strdup(if_info->vendor_description); + for (list = g_slist_nth(if_info->addrs, 0); list != NULL; list = g_slist_next(list)) { + temp_addr = g_new0(if_addr_t, 1); + if_addr = (if_addr_t *)list->data; + if (if_addr) { + temp_addr->ifat_type = if_addr->ifat_type; + if (temp_addr->ifat_type == IF_AT_IPv4) { + temp_addr->addr.ip4_addr = if_addr->addr.ip4_addr; + } else { + memcpy(temp_addr->addr.ip6_addr, if_addr->addr.ip6_addr, sizeof(if_addr->addr)); + } + } else { + g_free(temp_addr); + temp_addr = NULL; + } + if (temp_addr) { + temp->addrs = g_slist_append(temp->addrs, temp_addr); + } + } + temp->loopback = if_info->loopback; + iflist = g_list_append(iflist, temp); + } + return iflist; +} +#endif + +/** + * Fetch the interface list from a child process (dumpcap). + * + * @return A GList containing if_info_t structs if successful, NULL (with err and possibly err_str set) otherwise. + * + */ + +/* XXX - We parse simple text output to get our interface list. Should + * we use "real" data serialization instead, e.g. via XML? */ +GList * +capture_interface_list(int *err, char **err_str, void (*update_cb)(void)) +{ + int ret; + GList *if_list = NULL; + int i, j; + char *data, *primary_msg, *secondary_msg; + char **raw_list, **if_parts, **addr_parts; + char *name; + if_info_t *if_info; + if_addr_t *if_addr; + + *err = 0; + if (err_str) { + *err_str = NULL; + } + + /* Try to get the local interface list */ + ret = sync_interface_list_open(&data, &primary_msg, &secondary_msg, update_cb); + if (ret != 0) { + ws_info("sync_interface_list_open() failed. %s (%s)", + primary_msg ? primary_msg : "no message", + secondary_msg ? secondary_msg : "no secondary message"); + if (err_str) { + *err_str = primary_msg; + } else { + g_free(primary_msg); + } + g_free(secondary_msg); + *err = CANT_GET_INTERFACE_LIST; + + /* + * Add the extcap interfaces that can exist; they may exist + * even if no native interfaces have been found. + */ + ws_info("Loading External Capture Interface List ..."); + if_list = append_extcap_interface_list(if_list); + return if_list; + } + + /* Split our lines */ +#ifdef _WIN32 + raw_list = g_strsplit(data, "\r\n", 0); +#else + raw_list = g_strsplit(data, "\n", 0); +#endif + g_free(data); + + for (i = 0; raw_list[i] != NULL; i++) { + if_parts = g_strsplit(raw_list[i], "\t", 7); + if (if_parts[0] == NULL || if_parts[1] == NULL || if_parts[2] == NULL || + if_parts[3] == NULL || if_parts[4] == NULL || if_parts[5] == NULL || + if_parts[6] == NULL) { + g_strfreev(if_parts); + continue; + } + + /* Number followed by the name, e.g "1. eth0" */ + name = strchr(if_parts[0], ' '); + if (name) { + name++; + } else { + g_strfreev(if_parts); + continue; + } + + if_info = g_new0(if_info_t,1); + if_info->name = g_strdup(name); + if (strlen(if_parts[1]) > 0) + if_info->vendor_description = g_strdup(if_parts[1]); + if (strlen(if_parts[2]) > 0) + if_info->friendly_name = g_strdup(if_parts[2]); + if_info->type = (interface_type)(int)strtol(if_parts[3], NULL, 10); + addr_parts = g_strsplit(if_parts[4], ",", 0); + for (j = 0; addr_parts[j] != NULL; j++) { + if_addr = g_new0(if_addr_t,1); + if (ws_inet_pton4(addr_parts[j], &if_addr->addr.ip4_addr)) { + if_addr->ifat_type = IF_AT_IPv4; + } else if (ws_inet_pton6(addr_parts[j], (ws_in6_addr *)&if_addr->addr.ip6_addr)) { + if_addr->ifat_type = IF_AT_IPv6; + } else { + g_free(if_addr); + if_addr = NULL; + } + if (if_addr) { + if_info->addrs = g_slist_append(if_info->addrs, if_addr); + } + } + if (strcmp(if_parts[5], "loopback") == 0) + if_info->loopback = true; + if_info->extcap = g_strdup(if_parts[6]); + g_strfreev(if_parts); + g_strfreev(addr_parts); + if_list = g_list_append(if_list, if_info); + } + g_strfreev(raw_list); + +#ifdef HAVE_PCAP_REMOTE + /* Add the remote interface list */ + if (remote_interface_list && g_list_length(remote_interface_list) > 0) { + if_list = append_remote_list(if_list); + } +#endif + + /* Add the extcap interfaces after the native and remote interfaces */ + ws_info("Loading External Capture Interface List ..."); + if_list = append_extcap_interface_list(if_list); + + return if_list; +} + +/* XXX - We parse simple text output to get our interface list. Should + * we use "real" data serialization instead, e.g. via XML? */ +if_capabilities_t * +capture_get_if_capabilities(const char *ifname, bool monitor_mode, + const char *auth_string, + char **err_primary_msg, char **err_secondary_msg, + void (*update_cb)(void)) +{ + if_capabilities_t *caps; + GList *linktype_list = NULL, *timestamp_list = NULL; + int err, i; + char *data, *primary_msg, *secondary_msg; + char **raw_list; + + /* see if the interface is from extcap */ + caps = extcap_get_if_dlts(ifname, err_primary_msg); + if (caps != NULL) + return caps; + + /* return if the extcap interface generated an error */ + if (err_primary_msg != NULL && *err_primary_msg != NULL) + return NULL; + + /* Try to get our interface list */ + err = sync_if_capabilities_open(ifname, monitor_mode, auth_string, &data, + &primary_msg, &secondary_msg, update_cb); + if (err != 0) { + ws_info("Capture Interface Capabilities failed. Error %d, %s", + err, primary_msg ? primary_msg : "no message"); + if (err_primary_msg) + *err_primary_msg = primary_msg; + else + g_free(primary_msg); + if (err_secondary_msg) + *err_secondary_msg = secondary_msg; + else + g_free(secondary_msg); + return NULL; + } + + /* Split our lines */ +#ifdef _WIN32 + raw_list = g_strsplit(data, "\r\n", 0); +#else + raw_list = g_strsplit(data, "\n", 0); +#endif + g_free(data); + + /* + * First line is 0 if monitor mode isn't supported, 1 if it is. + */ + if (raw_list[0] == NULL || *raw_list[0] == '\0') { + ws_info("Capture Interface Capabilities returned no information."); + if (err_primary_msg) { + *err_primary_msg = g_strdup("Dumpcap returned no interface capability information"); + } + g_strfreev(raw_list); + return NULL; + } + + /* + * Allocate the interface capabilities structure. + */ + caps = (if_capabilities_t *)g_malloc(sizeof *caps); + switch (*raw_list[0]) { + + case '0': + caps->can_set_rfmon = false; + break; + + case '1': + caps->can_set_rfmon = true; + break; + + default: + ws_info("Capture Interface Capabilities returned bad information."); + if (err_primary_msg) { + *err_primary_msg = ws_strdup_printf("Dumpcap returned \"%s\" for monitor-mode capability", + raw_list[0]); + } + g_free(caps); + g_strfreev(raw_list); + return NULL; + } + + /* + * The following are link-layer types. + */ + for (i = 1; raw_list[i] != NULL && *raw_list[i] != '\0'; i++) { + data_link_info_t *data_link_info; + /* ...and what if the interface name has a tab in it, Mr. Clever Programmer? */ + char **lt_parts = g_strsplit(raw_list[i], "\t", 3); + if (lt_parts[0] == NULL || lt_parts[1] == NULL || lt_parts[2] == NULL) { + g_strfreev(lt_parts); + continue; + } + + data_link_info = g_new(data_link_info_t,1); + data_link_info->dlt = (int) strtol(lt_parts[0], NULL, 10); + data_link_info->name = g_strdup(lt_parts[1]); + if (strcmp(lt_parts[2], "(not supported)") != 0) + data_link_info->description = g_strdup(lt_parts[2]); + else + data_link_info->description = NULL; + g_strfreev(lt_parts); + + linktype_list = g_list_append(linktype_list, data_link_info); + } + + if (raw_list[i]) { /* Oh, timestamp types! */ + for (i++; raw_list[i] != NULL && *raw_list[i] != '\0'; i++) { + timestamp_info_t *timestamp_info; + char **tt_parts = g_strsplit(raw_list[i], "\t", 2); + if (tt_parts[0] == NULL || tt_parts[1] == NULL) { + g_strfreev(tt_parts); + continue; + } + + timestamp_info = g_new(timestamp_info_t,1); + timestamp_info->name = g_strdup(tt_parts[0]); + timestamp_info->description = g_strdup(tt_parts[1]); + g_strfreev(tt_parts); + + timestamp_list = g_list_append(timestamp_list, timestamp_info); + } + } + + g_strfreev(raw_list); + + caps->data_link_types = linktype_list; + /* Might be NULL. Not all systems report timestamp types */ + caps->timestamp_types = timestamp_list; + + return caps; +} + +#ifdef HAVE_PCAP_REMOTE +void add_interface_to_remote_list(if_info_t *if_info) +{ + GSList *list; + if_addr_t *if_addr, *temp_addr; + + if_info_t *temp = g_new0(if_info_t, 1); + temp->name = g_strdup(if_info->name); + temp->friendly_name = g_strdup(if_info->friendly_name); + temp->vendor_description = g_strdup(if_info->vendor_description); + for (list = g_slist_nth(if_info->addrs, 0); list != NULL; list = g_slist_next(list)) { + temp_addr = g_new0(if_addr_t, 1); + if_addr = (if_addr_t *)list->data; + if (if_addr) { + temp_addr->ifat_type = if_addr->ifat_type; + if (temp_addr->ifat_type == IF_AT_IPv4) { + temp_addr->addr.ip4_addr = if_addr->addr.ip4_addr; + } else { + memcpy(temp_addr->addr.ip6_addr, if_addr->addr.ip6_addr, sizeof(if_addr->addr)); + } + } else { + g_free(temp_addr); + temp_addr = NULL; + } + if (temp_addr) { + temp->addrs = g_slist_append(temp->addrs, temp_addr); + } + } + temp->loopback = if_info->loopback; + remote_interface_list = g_list_append(remote_interface_list, temp); +} +#endif +#endif /* HAVE_LIBPCAP */ -- cgit v1.2.3