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wireshark/wiretap/wtap.c

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/* wtap.c
*
* Wiretap Library
* Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu>
*
* This program 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 2
* of the License, or (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include <string.h>
#include <errno.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_LIBZ
#include <zlib.h>
#endif
#include "wtap-int.h"
#include "file_wrappers.h"
#include <wsutil/file_util.h>
#include "buffer.h"
#ifdef HAVE_PLUGINS
#include <wsutil/plugins.h>
/*
* List of wiretap plugins.
*/
typedef struct {
void (*register_wtap_module)(void); /* routine to call to register a wiretap module */
} wtap_plugin;
static GSList *wtap_plugins = NULL;
/*
* Callback for each plugin found.
*/
static gboolean
check_for_wtap_plugin(GModule *handle)
{
gpointer gp;
void (*register_wtap_module)(void);
wtap_plugin *plugin;
/*
* Do we have a register_wtap_module routine?
*/
if (!g_module_symbol(handle, "register_wtap_module", &gp)) {
/* No, so this isn't a wiretap module plugin. */
return FALSE;
}
/*
* Yes - this plugin includes one or more wiretap modules.
*/
register_wtap_module = (void (*)(void))gp;
/*
* Add this one to the list of wiretap module plugins.
*/
plugin = (wtap_plugin *)g_malloc(sizeof (wtap_plugin));
plugin->register_wtap_module = register_wtap_module;
wtap_plugins = g_slist_append(wtap_plugins, plugin);
return TRUE;
}
void
wtap_register_plugin_types(void)
{
add_plugin_type("file format", check_for_wtap_plugin);
}
static void
register_wtap_module_plugin(gpointer data, gpointer user_data _U_)
{
wtap_plugin *plugin = (wtap_plugin *)data;
(plugin->register_wtap_module)();
}
/*
* For all wiretap module plugins, call their register routines.
*/
void
register_all_wiretap_modules(void)
{
g_slist_foreach(wtap_plugins, register_wtap_module_plugin, NULL);
}
#endif /* HAVE_PLUGINS */
/*
* Return the size of the file, as reported by the OS.
* (gint64, in case that's 64 bits.)
*/
gint64
wtap_file_size(wtap *wth, int *err)
{
ws_statb64 statb;
if (file_fstat((wth->fh == NULL) ? wth->random_fh : wth->fh,
&statb, err) == -1)
return -1;
return statb.st_size;
}
/*
* Do an fstat on the file.
*/
int
wtap_fstat(wtap *wth, ws_statb64 *statb, int *err)
{
if (file_fstat((wth->fh == NULL) ? wth->random_fh : wth->fh,
statb, err) == -1)
return -1;
return 0;
}
int
wtap_file_type_subtype(wtap *wth)
{
return wth->file_type_subtype;
}
gboolean
wtap_iscompressed(wtap *wth)
{
return file_iscompressed((wth->fh == NULL) ? wth->random_fh : wth->fh);
}
guint
wtap_snapshot_length(wtap *wth)
{
return wth->snapshot_length;
}
int
wtap_file_encap(wtap *wth)
{
return wth->file_encap;
}
int
wtap_file_tsprecision(wtap *wth)
{
return wth->tsprecision;
}
wtapng_section_t *
wtap_file_get_shb_info(wtap *wth)
{
wtapng_section_t *shb_hdr;
if(wth == NULL)
return NULL;
shb_hdr = g_new(wtapng_section_t,1);
shb_hdr->section_length = wth->shb_hdr.section_length;
/* options */
shb_hdr->opt_comment = wth->shb_hdr.opt_comment; /* NULL if not available */
shb_hdr->shb_hardware = wth->shb_hdr.shb_hardware; /* NULL if not available, UTF-8 string containing the description of the hardware used to create this section. */
shb_hdr->shb_os = wth->shb_hdr.shb_os; /* NULL if not available, UTF-8 string containing the name of the operating system used to create this section. */
shb_hdr->shb_user_appl = wth->shb_hdr.shb_user_appl; /* NULL if not available, UTF-8 string containing the name of the application used to create this section. */
return shb_hdr;
}
void
wtap_write_shb_comment(wtap *wth, gchar *comment)
{
g_free(wth->shb_hdr.opt_comment);
wth->shb_hdr.opt_comment = comment;
}
wtapng_iface_descriptions_t *
wtap_file_get_idb_info(wtap *wth)
{
wtapng_iface_descriptions_t *idb_info;
idb_info = g_new(wtapng_iface_descriptions_t,1);
idb_info->interface_data = wth->interface_data;
return idb_info;
}
/* Table of the encapsulation types we know about. */
struct encap_type_info {
const char *name;
const char *short_name;
};
static struct encap_type_info encap_table_base[] = {
/* WTAP_ENCAP_UNKNOWN */
{ "Unknown", "unknown" },
/* WTAP_ENCAP_ETHERNET */
{ "Ethernet", "ether" },
/* WTAP_ENCAP_TOKEN_RING */
{ "Token Ring", "tr" },
/* WTAP_ENCAP_SLIP */
{ "SLIP", "slip" },
/* WTAP_ENCAP_PPP */
{ "PPP", "ppp" },
/* WTAP_ENCAP_FDDI */
{ "FDDI", "fddi" },
/* WTAP_ENCAP_FDDI_BITSWAPPED */
{ "FDDI with bit-swapped MAC addresses", "fddi-swapped" },
/* WTAP_ENCAP_RAW_IP */
{ "Raw IP", "rawip" },
/* WTAP_ENCAP_ARCNET */
{ "ARCNET", "arcnet" },
/* WTAP_ENCAP_ARCNET_LINUX */
{ "Linux ARCNET", "arcnet_linux" },
/* WTAP_ENCAP_ATM_RFC1483 */
{ "RFC 1483 ATM", "atm-rfc1483" },
/* WTAP_ENCAP_LINUX_ATM_CLIP */
{ "Linux ATM CLIP", "linux-atm-clip" },
/* WTAP_ENCAP_LAPB */
{ "LAPB", "lapb" },
/* WTAP_ENCAP_ATM_PDUS */
{ "ATM PDUs", "atm-pdus" },
/* WTAP_ENCAP_ATM_PDUS_UNTRUNCATED */
{ "ATM PDUs - untruncated", "atm-pdus-untruncated" },
/* WTAP_ENCAP_NULL */
{ "NULL", "null" },
/* WTAP_ENCAP_ASCEND */
{ "Lucent/Ascend access equipment", "ascend" },
/* WTAP_ENCAP_ISDN */
{ "ISDN", "isdn" },
/* WTAP_ENCAP_IP_OVER_FC */
{ "RFC 2625 IP-over-Fibre Channel", "ip-over-fc" },
/* WTAP_ENCAP_PPP_WITH_PHDR */
{ "PPP with Directional Info", "ppp-with-direction" },
/* WTAP_ENCAP_IEEE_802_11 */
{ "IEEE 802.11 Wireless LAN", "ieee-802-11" },
/* WTAP_ENCAP_IEEE_802_11_PRISM */
{ "IEEE 802.11 plus Prism II monitor mode radio header", "ieee-802-11-prism" },
/* WTAP_ENCAP_IEEE_802_11_WITH_RADIO */
{ "IEEE 802.11 Wireless LAN with radio information", "ieee-802-11-radio" },
/* WTAP_ENCAP_IEEE_802_11_RADIOTAP */
{ "IEEE 802.11 plus radiotap radio header", "ieee-802-11-radiotap" },
/* WTAP_ENCAP_IEEE_802_11_AVS */
{ "IEEE 802.11 plus AVS radio header", "ieee-802-11-avs" },
/* WTAP_ENCAP_SLL */
{ "Linux cooked-mode capture", "linux-sll" },
/* WTAP_ENCAP_FRELAY */
{ "Frame Relay", "frelay" },
/* WTAP_ENCAP_FRELAY_WITH_PHDR */
{ "Frame Relay with Directional Info", "frelay-with-direction" },
/* WTAP_ENCAP_CHDLC */
{ "Cisco HDLC", "chdlc" },
/* WTAP_ENCAP_CISCO_IOS */
{ "Cisco IOS internal", "ios" },
/* WTAP_ENCAP_LOCALTALK */
{ "Localtalk", "ltalk" },
/* WTAP_ENCAP_OLD_PFLOG */
{ "OpenBSD PF Firewall logs, pre-3.4", "pflog-old" },
/* WTAP_ENCAP_HHDLC */
{ "HiPath HDLC", "hhdlc" },
/* WTAP_ENCAP_DOCSIS */
{ "Data Over Cable Service Interface Specification", "docsis" },
/* WTAP_ENCAP_COSINE */
{ "CoSine L2 debug log", "cosine" },
/* WTAP_ENCAP_WFLEET_HDLC */
{ "Wellfleet HDLC", "whdlc" },
/* WTAP_ENCAP_SDLC */
{ "SDLC", "sdlc" },
/* WTAP_ENCAP_TZSP */
{ "Tazmen sniffer protocol", "tzsp" },
/* WTAP_ENCAP_ENC */
{ "OpenBSD enc(4) encapsulating interface", "enc" },
/* WTAP_ENCAP_PFLOG */
{ "OpenBSD PF Firewall logs", "pflog" },
/* WTAP_ENCAP_CHDLC_WITH_PHDR */
{ "Cisco HDLC with Directional Info", "chdlc-with-direction" },
/* WTAP_ENCAP_BLUETOOTH_H4 */
{ "Bluetooth H4", "bluetooth-h4" },
/* WTAP_ENCAP_MTP2 */
{ "SS7 MTP2", "mtp2" },
/* WTAP_ENCAP_MTP3 */
{ "SS7 MTP3", "mtp3" },
/* WTAP_ENCAP_IRDA */
{ "IrDA", "irda" },
/* WTAP_ENCAP_USER0 */
{ "USER 0", "user0" },
/* WTAP_ENCAP_USER1 */
{ "USER 1", "user1" },
/* WTAP_ENCAP_USER2 */
{ "USER 2", "user2" },
/* WTAP_ENCAP_USER3 */
{ "USER 3", "user3" },
/* WTAP_ENCAP_USER4 */
{ "USER 4", "user4" },
/* WTAP_ENCAP_USER5 */
{ "USER 5", "user5" },
/* WTAP_ENCAP_USER6 */
{ "USER 6", "user6" },
/* WTAP_ENCAP_USER7 */
{ "USER 7", "user7" },
/* WTAP_ENCAP_USER8 */
{ "USER 8", "user8" },
/* WTAP_ENCAP_USER9 */
{ "USER 9", "user9" },
/* WTAP_ENCAP_USER10 */
{ "USER 10", "user10" },
/* WTAP_ENCAP_USER11 */
{ "USER 11", "user11" },
/* WTAP_ENCAP_USER12 */
{ "USER 12", "user12" },
/* WTAP_ENCAP_USER13 */
{ "USER 13", "user13" },
/* WTAP_ENCAP_USER14 */
{ "USER 14", "user14" },
/* WTAP_ENCAP_USER15 */
{ "USER 15", "user15" },
/* WTAP_ENCAP_SYMANTEC */
{ "Symantec Enterprise Firewall", "symantec" },
/* WTAP_ENCAP_APPLE_IP_OVER_IEEE1394 */
{ "Apple IP-over-IEEE 1394", "ap1394" },
/* WTAP_ENCAP_BACNET_MS_TP */
{ "BACnet MS/TP", "bacnet-ms-tp" },
/* WTAP_ENCAP_NETTL_RAW_ICMP */
{ "Raw ICMP with nettl headers", "raw-icmp-nettl" },
/* WTAP_ENCAP_NETTL_RAW_ICMPV6 */
{ "Raw ICMPv6 with nettl headers", "raw-icmpv6-nettl" },
/* WTAP_ENCAP_GPRS_LLC */
{ "GPRS LLC", "gprs-llc" },
/* WTAP_ENCAP_JUNIPER_ATM1 */
{ "Juniper ATM1", "juniper-atm1" },
/* WTAP_ENCAP_JUNIPER_ATM2 */
{ "Juniper ATM2", "juniper-atm2" },
/* WTAP_ENCAP_REDBACK */
{ "Redback SmartEdge", "redback" },
/* WTAP_ENCAP_NETTL_RAW_IP */
{ "Raw IP with nettl headers", "rawip-nettl" },
/* WTAP_ENCAP_NETTL_ETHERNET */
{ "Ethernet with nettl headers", "ether-nettl" },
/* WTAP_ENCAP_NETTL_TOKEN_RING */
{ "Token Ring with nettl headers", "tr-nettl" },
/* WTAP_ENCAP_NETTL_FDDI */
{ "FDDI with nettl headers", "fddi-nettl" },
/* WTAP_ENCAP_NETTL_UNKNOWN */
{ "Unknown link-layer type with nettl headers", "unknown-nettl" },
/* WTAP_ENCAP_MTP2_WITH_PHDR */
{ "MTP2 with pseudoheader", "mtp2-with-phdr" },
/* WTAP_ENCAP_JUNIPER_PPPOE */
{ "Juniper PPPoE", "juniper-pppoe" },
/* WTAP_ENCAP_GCOM_TIE1 */
{ "GCOM TIE1", "gcom-tie1" },
/* WTAP_ENCAP_GCOM_SERIAL */
{ "GCOM Serial", "gcom-serial" },
/* WTAP_ENCAP_NETTL_X25 */
{ "X.25 with nettl headers", "x25-nettl" },
/* WTAP_ENCAP_K12 */
{ "K12 protocol analyzer", "k12" },
/* WTAP_ENCAP_JUNIPER_MLPPP */
{ "Juniper MLPPP", "juniper-mlppp" },
/* WTAP_ENCAP_JUNIPER_MLFR */
{ "Juniper MLFR", "juniper-mlfr" },
/* WTAP_ENCAP_JUNIPER_ETHER */
{ "Juniper Ethernet", "juniper-ether" },
/* WTAP_ENCAP_JUNIPER_PPP */
{ "Juniper PPP", "juniper-ppp" },
/* WTAP_ENCAP_JUNIPER_FRELAY */
{ "Juniper Frame-Relay", "juniper-frelay" },
/* WTAP_ENCAP_JUNIPER_CHDLC */
{ "Juniper C-HDLC", "juniper-chdlc" },
/* WTAP_ENCAP_JUNIPER_GGSN */
{ "Juniper GGSN", "juniper-ggsn" },
/* WTAP_ENCAP_LINUX_LAPD */
{ "LAPD with Linux pseudo-header", "linux-lapd" },
/* WTAP_ENCAP_CATAPULT_DCT2000 */
{ "Catapult DCT2000", "dct2000" },
/* WTAP_ENCAP_BER */
{ "ASN.1 Basic Encoding Rules", "ber" },
/* WTAP_ENCAP_JUNIPER_VP */
{ "Juniper Voice PIC", "juniper-vp" },
/* WTAP_ENCAP_USB */
{ "Raw USB packets", "usb" },
/* WTAP_ENCAP_IEEE802_16_MAC_CPS */
{ "IEEE 802.16 MAC Common Part Sublayer", "ieee-802-16-mac-cps" },
/* WTAP_ENCAP_NETTL_RAW_TELNET */
{ "Raw telnet with nettl headers", "raw-telnet-nettl" },
/* WTAP_ENCAP_USB_LINUX */
{ "USB packets with Linux header", "usb-linux" },
/* WTAP_ENCAP_MPEG */
{ "MPEG", "mpeg" },
/* WTAP_ENCAP_PPI */
{ "Per-Packet Information header", "ppi" },
/* WTAP_ENCAP_ERF */
{ "Extensible Record Format", "erf" },
/* WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR */
{ "Bluetooth H4 with linux header", "bluetooth-h4-linux" },
/* WTAP_ENCAP_SITA */
{ "SITA WAN packets", "sita-wan" },
/* WTAP_ENCAP_SCCP */
{ "SS7 SCCP", "sccp" },
/* WTAP_ENCAP_BLUETOOTH_HCI */
{ "Bluetooth without transport layer", "bluetooth-hci" },
/* WTAP_ENCAP_IPMB */
{ "Intelligent Platform Management Bus", "ipmb" },
/* WTAP_ENCAP_IEEE802_15_4 */
{ "IEEE 802.15.4 Wireless PAN", "wpan" },
/* WTAP_ENCAP_X2E_XORAYA */
{ "X2E Xoraya", "x2e-xoraya" },
/* WTAP_ENCAP_FLEXRAY */
{ "FlexRay", "flexray" },
/* WTAP_ENCAP_LIN */
{ "Local Interconnect Network", "lin" },
/* WTAP_ENCAP_MOST */
{ "Media Oriented Systems Transport", "most" },
/* WTAP_ENCAP_CAN20B */
{ "Controller Area Network 2.0B", "can20b" },
/* WTAP_ENCAP_LAYER1_EVENT */
{ "EyeSDN Layer 1 event", "layer1-event" },
/* WTAP_ENCAP_X2E_SERIAL */
{ "X2E serial line capture", "x2e-serial" },
/* WTAP_ENCAP_I2C */
{ "I2C", "i2c" },
/* WTAP_ENCAP_IEEE802_15_4_NONASK_PHY */
{ "IEEE 802.15.4 Wireless PAN non-ASK PHY", "wpan-nonask-phy" },
/* WTAP_ENCAP_TNEF */
{ "Transport-Neutral Encapsulation Format", "tnef" },
/* WTAP_ENCAP_USB_LINUX_MMAPPED */
{ "USB packets with Linux header and padding", "usb-linux-mmap" },
/* WTAP_ENCAP_GSM_UM */
{ "GSM Um Interface", "gsm_um" },
/* WTAP_ENCAP_DPNSS */
{ "Digital Private Signalling System No 1 Link Layer", "dpnss_link" },
/* WTAP_ENCAP_PACKETLOGGER */
{ "PacketLogger", "packetlogger" },
/* WTAP_ENCAP_NSTRACE_1_0 */
{ "NetScaler Encapsulation 1.0 of Ethernet", "nstrace10" },
/* WTAP_ENCAP_NSTRACE_2_0 */
{ "NetScaler Encapsulation 2.0 of Ethernet", "nstrace20" },
/* WTAP_ENCAP_FIBRE_CHANNEL_FC2 */
{ "Fibre Channel FC-2", "fc2" },
/* WTAP_ENCAP_FIBRE_CHANNEL_FC2_WITH_FRAME_DELIMS */
{ "Fibre Channel FC-2 With Frame Delimiter", "fc2sof"},
/* WTAP_ENCAP_JPEG_JFIF */
{ "JPEG/JFIF", "jfif" },
/* WTAP_ENCAP_IPNET */
{ "Solaris IPNET", "ipnet" },
/* WTAP_ENCAP_SOCKETCAN */
{ "SocketCAN", "socketcan" },
/* WTAP_ENCAP_IEEE_802_11_NETMON */
{ "IEEE 802.11 plus Network Monitor radio header", "ieee-802-11-netmon" },
/* WTAP_ENCAP_IEEE802_15_4_NOFCS */
{ "IEEE 802.15.4 Wireless PAN with FCS not present", "wpan-nofcs" },
/* WTAP_ENCAP_RAW_IPFIX */
{ "IPFIX", "ipfix" },
/* WTAP_ENCAP_RAW_IP4 */
{ "Raw IPv4", "rawip4" },
/* WTAP_ENCAP_RAW_IP6 */
{ "Raw IPv6", "rawip6" },
/* WTAP_ENCAP_LAPD */
{ "LAPD", "lapd" },
/* WTAP_ENCAP_DVBCI */
{ "DVB-CI (Common Interface)", "dvbci"},
/* WTAP_ENCAP_MUX27010 */
{ "MUX27010", "mux27010"},
/* WTAP_ENCAP_MIME */
{ "MIME", "mime" },
/* WTAP_ENCAP_NETANALYZER */
{ "netANALYZER", "netanalyzer" },
/* WTAP_ENCAP_NETANALYZER_TRANSPARENT */
{ "netANALYZER-Transparent", "netanalyzer-transparent" },
/* WTAP_ENCAP_IP_OVER_IB */
{ "IP over Infiniband", "ip-over-ib" },
/* WTAP_ENCAP_MPEG_2_TS */
{ "ISO/IEC 13818-1 MPEG2-TS", "mp2ts" },
/* WTAP_ENCAP_PPP_ETHER */
{ "PPP-over-Ethernet session", "pppoes" },
/* WTAP_ENCAP_NFC_LLCP */
{ "NFC LLCP", "nfc-llcp" },
/* WTAP_ENCAP_NFLOG */
{ "NFLOG", "nflog" },
/* WTAP_ENCAP_V5_EF */
{ "V5 Envelope Function", "v5-ef" },
/* WTAP_ENCAP_BACNET_MS_TP_WITH_PHDR */
{ "BACnet MS/TP with Directional Info", "bacnet-ms-tp-with-direction" },
/* WTAP_ENCAP_IXVERIWAVE */
{ "IxVeriWave header and stats block", "ixveriwave" },
/* WTAP_ENCAP_IEEE_802_11_AIROPEEK */
{ "IEEE 802.11 plus AiroPeek radio header", "ieee-802-11-airopeek" },
/* WTAP_ENCAP_SDH */
{ "SDH", "sdh" },
/* WTAP_ENCAP_DBUS */
{ "D-Bus", "dbus" },
/* WTAP_ENCAP_AX25_KISS */
{ "AX.25 with KISS header", "ax25-kiss" },
/* WTAP_ENCAP_AX25 */
{ "Amateur Radio AX.25", "ax25" },
/* WTAP_ENCAP_SCTP */
{ "SCTP", "sctp" },
/* WTAP_ENCAP_INFINIBAND */
{ "InfiniBand", "infiniband" },
/* WTAP_ENCAP_JUNIPER_SVCS */
{ "Juniper Services", "juniper-svcs" },
/* WTAP_ENCAP_USBPCAP */
{ "USB packets with USBPcap header", "usb-usbpcap" },
/* WTAP_ENCAP_RTAC_SERIAL */
{ "RTAC serial-line", "rtac-serial" },
/* WTAP_ENCAP_BLUETOOTH_LE_LL */
{ "Bluetooth Low Energy Link Layer", "bluetooth-le-ll" },
/* WTAP_ENCAP_WIRESHARK_UPPER_PDU */
{ "Wireshark Upper PDU export", "wireshark-upper-pdu" },
/* WTAP_ENCAP_STANAG_4607 */
{ "STANAG 4607", "s4607" },
/* WTAP_ENCAP_STANAG_5066_D_PDU */
{ "STANAG 5066 Data Transfer Sublayer PDUs(D_PDU)", "s5066-dpdu"},
/* WTAP_ENCAP_NETLINK */
{ "Netlink", "Linux netlink" },
/* WTAP_ENCAP_BLUETOOTH_LINUX_MONITOR */
{ "Bluetooth Linux Monitor", "bluetooth-linux-monitor" },
/* WTAP_ENCAP_BLUETOOTH_BREDR_BB */
{ "Bluetooth BR/EDR Baseband RF", "bluetooth-bredr-bb-rf" },
/* WTAP_ENCAP_BLUETOOTH_LE_LL_WITH_PHDR */
{ "Bluetooth Low Energy Link Layer RF", "bluetooth-le-ll-rf" },
/* WTAP_ENCAP_NSTRACE_3_0 */
{ "NetScaler Encapsulation 3.0 of Ethernet", "nstrace30" },
/* WTAP_ENCAP_LOGCAT */
{ "Android Logcat Binary format", "logcat" },
/* WTAP_ENCAP_LOGCAT_BRIEF */
{ "Android Logcat Brief text format", "logcat_brief" },
/* WTAP_ENCAP_LOGCAT_PROCESS */
{ "Android Logcat Process text format", "logcat_process" },
/* WTAP_ENCAP_LOGCAT_TAG */
{ "Android Logcat Tag text format", "logcat_tag" },
/* WTAP_ENCAP_LOGCAT_THREAD */
{ "Android Logcat Thread text format", "logcat_thread" },
/* WTAP_ENCAP_LOGCAT_TIME */
{ "Android Logcat Time text format", "logcat_time" },
/* WTAP_ENCAP_LOGCAT_THREADTIME */
{ "Android Logcat Threadtime text format", "logcat_threadtime" },
/* WTAP_ENCAP_LOGCAT_LONG */
{ "Android Logcat Long text format", "logcat_long" },
/* WTAP_ENCAP_PKTAP */
{ "Apple PKTAP", "pktap" },
/* WTAP_ENCAP_EPON */
{ "Ethernet Passive Optical Network", "epon" },
};
WS_DLL_LOCAL
gint wtap_num_encap_types = sizeof(encap_table_base) / sizeof(struct encap_type_info);
static GArray* encap_table_arr = NULL;
#define encap_table_entry(encap) \
g_array_index(encap_table_arr, struct encap_type_info, encap)
static void wtap_init_encap_types(void) {
if (encap_table_arr) return;
encap_table_arr = g_array_new(FALSE,TRUE,sizeof(struct encap_type_info));
g_array_append_vals(encap_table_arr,encap_table_base,wtap_num_encap_types);
}
int wtap_get_num_encap_types(void) {
wtap_init_encap_types();
return wtap_num_encap_types;
}
int wtap_register_encap_type(const char* name, const char* short_name) {
struct encap_type_info e;
wtap_init_encap_types();
e.name = g_strdup(name);
e.short_name = g_strdup(short_name);
g_array_append_val(encap_table_arr,e);
return wtap_num_encap_types++;
}
/* Name that should be somewhat descriptive. */
const char *
wtap_encap_string(int encap)
{
if (encap < WTAP_ENCAP_PER_PACKET || encap >= WTAP_NUM_ENCAP_TYPES)
return "Illegal";
else if (encap == WTAP_ENCAP_PER_PACKET)
return "Per packet";
else
return encap_table_entry(encap).name;
}
/* Name to use in, say, a command-line flag specifying the type. */
const char *
wtap_encap_short_string(int encap)
{
if (encap < WTAP_ENCAP_PER_PACKET || encap >= WTAP_NUM_ENCAP_TYPES)
return "illegal";
else if (encap == WTAP_ENCAP_PER_PACKET)
return "per-packet";
else
return encap_table_entry(encap).short_name;
}
/* Translate a short name to a capture file type. */
int
wtap_short_string_to_encap(const char *short_name)
{
int encap;
for (encap = 0; encap < WTAP_NUM_ENCAP_TYPES; encap++) {
if (encap_table_entry(encap).short_name != NULL &&
strcmp(short_name, encap_table_entry(encap).short_name) == 0)
return encap;
}
return -1; /* no such encapsulation type */
}
static const char *wtap_errlist[] = {
"The file isn't a plain file or pipe",
"The file is being opened for random access but is a pipe",
"The file isn't a capture file in a known format",
"File contains record data we don't support",
"That file format cannot be written to a pipe",
NULL,
"Files can't be saved in that format",
"Files from that network type can't be saved in that format",
"That file format doesn't support per-packet encapsulations",
NULL,
NULL,
"Less data was read than was expected",
"The file appears to be damaged or corrupt",
"Less data was written than was requested",
"Uncompression error: data oddly truncated",
"Uncompression error: data would overflow buffer",
"Uncompression error: bad LZ77 offset",
"The standard input cannot be opened for random access",
"That file format doesn't support compression",
NULL,
NULL,
"Uncompression error",
"Internal error",
"The packet being written is too large for that format"
};
#define WTAP_ERRLIST_SIZE (sizeof wtap_errlist / sizeof wtap_errlist[0])
const char *
wtap_strerror(int err)
{
static char errbuf[128];
unsigned int wtap_errlist_index;
if (err < 0) {
wtap_errlist_index = -1 - err;
if (wtap_errlist_index >= WTAP_ERRLIST_SIZE) {
g_snprintf(errbuf, 128, "Error %d", err);
return errbuf;
}
if (wtap_errlist[wtap_errlist_index] == NULL)
return "Unknown reason";
return wtap_errlist[wtap_errlist_index];
} else
return g_strerror(err);
}
/* Close only the sequential side, freeing up memory it uses.
Note that we do *not* want to call the subtype's close function,
as it would free any per-subtype data, and that data may be
needed by the random-access side.
Instead, if the subtype has a "sequential close" function, we call it,
to free up stuff used only by the sequential side. */
void
wtap_sequential_close(wtap *wth)
{
if (wth->subtype_sequential_close != NULL)
(*wth->subtype_sequential_close)(wth);
if (wth->fh != NULL) {
file_close(wth->fh);
wth->fh = NULL;
}
if (wth->frame_buffer) {
buffer_free(wth->frame_buffer);
g_free(wth->frame_buffer);
wth->frame_buffer = NULL;
}
}
static void
g_fast_seek_item_free(gpointer data, gpointer user_data _U_)
{
g_free(data);
}
/*
* Close the file descriptors for the sequential and random streams, but
* don't discard any information about those streams. Used on Windows if
* we need to rename a file that we have open or if we need to rename on
* top of a file we have open.
*/
void
wtap_fdclose(wtap *wth)
{
if (wth->fh != NULL)
file_fdclose(wth->fh);
if (wth->random_fh != NULL)
file_fdclose(wth->random_fh);
}
void
wtap_close(wtap *wth)
{
guint i, j;
wtapng_if_descr_t *wtapng_if_descr;
wtapng_if_stats_t *if_stats;
wtap_sequential_close(wth);
if (wth->subtype_close != NULL)
(*wth->subtype_close)(wth);
if (wth->random_fh != NULL)
file_close(wth->random_fh);
if (wth->priv != NULL)
g_free(wth->priv);
if (wth->fast_seek != NULL) {
g_ptr_array_foreach(wth->fast_seek, g_fast_seek_item_free, NULL);
g_ptr_array_free(wth->fast_seek, TRUE);
}
for(i = 0; i < wth->interface_data->len; i++) {
wtapng_if_descr = &g_array_index(wth->interface_data, wtapng_if_descr_t, i);
if(wtapng_if_descr->opt_comment != NULL){
g_free(wtapng_if_descr->opt_comment);
}
if(wtapng_if_descr->if_name != NULL){
g_free(wtapng_if_descr->if_name);
}
if(wtapng_if_descr->if_description != NULL){
g_free(wtapng_if_descr->if_description);
}
if(wtapng_if_descr->if_filter_str != NULL){
g_free(wtapng_if_descr->if_filter_str);
}
if(wtapng_if_descr->if_filter_bpf_bytes != NULL){
g_free(wtapng_if_descr->if_filter_bpf_bytes);
}
if(wtapng_if_descr->if_os != NULL){
g_free(wtapng_if_descr->if_os);
}
for(j = 0; j < wtapng_if_descr->num_stat_entries; j++) {
if_stats = &g_array_index(wtapng_if_descr->interface_statistics, wtapng_if_stats_t, j);
if(if_stats->opt_comment != NULL){
g_free(if_stats->opt_comment);
}
}
if(wtapng_if_descr->num_stat_entries != 0){
g_array_free(wtapng_if_descr->interface_statistics, TRUE);
}
}
g_array_free(wth->interface_data, TRUE);
g_free(wth);
}
void
wtap_cleareof(wtap *wth) {
/* Reset EOF */
file_clearerr(wth->fh);
}
void wtap_set_cb_new_ipv4(wtap *wth, wtap_new_ipv4_callback_t add_new_ipv4) {
if (wth)
wth->add_new_ipv4 = add_new_ipv4;
}
void wtap_set_cb_new_ipv6(wtap *wth, wtap_new_ipv6_callback_t add_new_ipv6) {
if (wth)
wth->add_new_ipv6 = add_new_ipv6;
}
int
wtap_read(wtap *wth, int *err, gchar **err_info, gint64 *data_offset)
{
int rectype;
/*
* Set the packet encapsulation to the file's encapsulation
* value; if that's not WTAP_ENCAP_PER_PACKET, it's the
* right answer (and means that the read routine for this
* capture file type doesn't have to set it), and if it
* *is* WTAP_ENCAP_PER_PACKET, the caller needs to set it
* anyway.
*/
wth->phdr.pkt_encap = wth->file_encap;
rectype = wth->subtype_read(wth, err, err_info, data_offset);
if (rectype == -1) {
/*
* If we didn't get an error indication, we read
* the last packet. See if there's any deferred
* error, as might, for example, occur if we're
* reading a compressed file, and we got an error
* reading compressed data from the file, but
* got enough compressed data to decompress the
* last packet of the file.
*/
if (*err == 0)
*err = file_error(wth->fh, err_info);
return rectype; /* failure */
}
/*
* It makes no sense for the captured data length to be bigger
* than the actual data length.
*/
if (wth->phdr.caplen > wth->phdr.len)
wth->phdr.caplen = wth->phdr.len;
/*
* Make sure that it's not WTAP_ENCAP_PER_PACKET, as that
* probably means the file has that encapsulation type
* but the read routine didn't set this packet's
* encapsulation type.
*/
g_assert(wth->phdr.pkt_encap != WTAP_ENCAP_PER_PACKET);
return rectype;
}
/*
* Read packet data into a Buffer, growing the buffer as necessary.
*
* This returns an error on a short read, even if the short read hit
* the EOF immediately. (The assumption is that each packet has a
* header followed by raw packet data, and that we've already read the
* header, so if we get an EOF trying to read the packet data, the file
* has been cut short, even if the read didn't read any data at all.)
*/
gboolean
wtap_read_packet_bytes(FILE_T fh, Buffer *buf, guint length, int *err,
gchar **err_info)
{
int bytes_read;
buffer_assure_space(buf, length);
errno = WTAP_ERR_CANT_READ;
bytes_read = file_read(buffer_start_ptr(buf), length, fh);
if (bytes_read < 0 || (guint)bytes_read != length) {
*err = file_error(fh, err_info);
if (*err == 0)
*err = WTAP_ERR_SHORT_READ;
return FALSE;
}
return TRUE;
}
/*
* Return an approximation of the amount of data we've read sequentially
* from the file so far. (gint64, in case that's 64 bits.)
*/
gint64
wtap_read_so_far(wtap *wth)
{
return file_tell_raw(wth->fh);
}
struct wtap_pkthdr *
wtap_phdr(wtap *wth)
{
return &wth->phdr;
}
guint8 *
wtap_buf_ptr(wtap *wth)
{
return buffer_start_ptr(wth->frame_buffer);
}
int
wtap_seek_read(wtap *wth, gint64 seek_off,
struct wtap_pkthdr *phdr, Buffer *buf, int *err, gchar **err_info)
{
int rectype;
rectype = wth->subtype_seek_read(wth, seek_off, phdr, buf, err, err_info);
if (rectype == -1)
return rectype;
/*
* It makes no sense for the captured data length to be bigger
* than the actual data length.
*/
if (wth->phdr.caplen > wth->phdr.len)
wth->phdr.caplen = wth->phdr.len;
/*
* Make sure that it's not WTAP_ENCAP_PER_PACKET, as that
* probably means the file has that encapsulation type
* but the read routine didn't set this packet's
* encapsulation type.
*/
g_assert(wth->phdr.pkt_encap != WTAP_ENCAP_PER_PACKET);
return rectype;
}
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