diff options
Diffstat (limited to 'savefile.c')
| -rw-r--r-- | savefile.c | 1498 |
1 files changed, 69 insertions, 1429 deletions
@@ -30,13 +30,27 @@ #ifndef lint static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/libpcap/savefile.c,v 1.168.2.10 2008-10-06 15:38:39 gianluca Exp $ (LBL)"; + "@(#) $Header: /tcpdump/master/libpcap/savefile.c,v 1.183 2008-12-23 20:13:29 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif +#ifdef WIN32 +#include <pcap-stdinc.h> +#else /* WIN32 */ +#if HAVE_INTTYPES_H +#include <inttypes.h> +#elif HAVE_STDINT_H +#include <stdint.h> +#endif +#ifdef HAVE_SYS_BITYPES_H +#include <sys/bitypes.h> +#endif +#include <sys/types.h> +#endif /* WIN32 */ + #include <errno.h> #include <memory.h> #include <stdio.h> @@ -50,56 +64,8 @@ static const char rcsid[] _U_ = #include "os-proto.h" #endif -/* - * Standard libpcap format. - */ -#define TCPDUMP_MAGIC 0xa1b2c3d4 - -/* - * Alexey Kuznetzov's modified libpcap format. - */ -#define KUZNETZOV_TCPDUMP_MAGIC 0xa1b2cd34 - -/* - * Reserved for Francisco Mesquita <francisco.mesquita@radiomovel.pt> - * for another modified format. - */ -#define FMESQUITA_TCPDUMP_MAGIC 0xa1b234cd - -/* - * Navtel Communcations' format, with nanosecond timestamps, - * as per a request from Dumas Hwang <dumas.hwang@navtelcom.com>. - */ -#define NAVTEL_TCPDUMP_MAGIC 0xa12b3c4d - -/* - * Normal libpcap format, except for seconds/nanoseconds timestamps, - * as per a request by Ulf Lamping <ulf.lamping@web.de> - */ -#define NSEC_TCPDUMP_MAGIC 0xa1b23c4d - -/* - * We use the "receiver-makes-right" approach to byte order, - * because time is at a premium when we are writing the file. - * In other words, the pcap_file_header and pcap_pkthdr, - * records are written in host byte order. - * Note that the bytes of packet data are written out in the order in - * which they were received, so multi-byte fields in packets are not - * written in host byte order, they're written in whatever order the - * sending machine put them in. - * - * ntoh[ls] aren't sufficient because we might need to swap on a big-endian - * machine (if the file was written in little-end order). - */ -#define SWAPLONG(y) \ -((((y)&0xff)<<24) | (((y)&0xff00)<<8) | (((y)&0xff0000)>>8) | (((y)>>24)&0xff)) -#define SWAPSHORT(y) \ - ( (((y)&0xff)<<8) | ((u_short)((y)&0xff00)>>8) ) - -#define SFERR_TRUNC 1 -#define SFERR_BADVERSION 2 -#define SFERR_BADF 3 -#define SFERR_EOF 4 /* not really an error, just a status */ +#include "sf-pcap.h" +#include "sf-pcap-ng.h" /* * Setting O_BINARY on DOS/Windows is a bit tricky @@ -114,926 +80,6 @@ static const char rcsid[] _U_ = #endif #endif -/* - * We don't write DLT_* values to the capture file header, because - * they're not the same on all platforms. - * - * Unfortunately, the various flavors of BSD have not always used the same - * numerical values for the same data types, and various patches to - * libpcap for non-BSD OSes have added their own DLT_* codes for link - * layer encapsulation types seen on those OSes, and those codes have had, - * in some cases, values that were also used, on other platforms, for other - * link layer encapsulation types. - * - * This means that capture files of a type whose numerical DLT_* code - * means different things on different BSDs, or with different versions - * of libpcap, can't always be read on systems other than those like - * the one running on the machine on which the capture was made. - * - * Instead, we define here a set of LINKTYPE_* codes, and map DLT_* codes - * to LINKTYPE_* codes when writing a savefile header, and map LINKTYPE_* - * codes to DLT_* codes when reading a savefile header. - * - * For those DLT_* codes that have, as far as we know, the same values on - * all platforms (DLT_NULL through DLT_FDDI), we define LINKTYPE_xxx as - * DLT_xxx; that way, captures of those types can still be read by - * versions of libpcap that map LINKTYPE_* values to DLT_* values, and - * captures of those types written by versions of libpcap that map DLT_ - * values to LINKTYPE_ values can still be read by older versions - * of libpcap. - * - * The other LINKTYPE_* codes are given values starting at 100, in the - * hopes that no DLT_* code will be given one of those values. - * - * In order to ensure that a given LINKTYPE_* code's value will refer to - * the same encapsulation type on all platforms, you should not allocate - * a new LINKTYPE_* value without consulting - * "tcpdump-workers@lists.tcpdump.org". The tcpdump developers will - * allocate a value for you, and will not subsequently allocate it to - * anybody else; that value will be added to the "pcap.h" in the - * tcpdump.org CVS repository, so that a future libpcap release will - * include it. - * - * You should, if possible, also contribute patches to libpcap and tcpdump - * to handle the new encapsulation type, so that they can also be checked - * into the tcpdump.org CVS repository and so that they will appear in - * future libpcap and tcpdump releases. - * - * Do *NOT* assume that any values after the largest value in this file - * are available; you might not have the most up-to-date version of this - * file, and new values after that one might have been assigned. Also, - * do *NOT* use any values below 100 - those might already have been - * taken by one (or more!) organizations. - */ -#define LINKTYPE_NULL DLT_NULL -#define LINKTYPE_ETHERNET DLT_EN10MB /* also for 100Mb and up */ -#define LINKTYPE_EXP_ETHERNET DLT_EN3MB /* 3Mb experimental Ethernet */ -#define LINKTYPE_AX25 DLT_AX25 -#define LINKTYPE_PRONET DLT_PRONET -#define LINKTYPE_CHAOS DLT_CHAOS -#define LINKTYPE_TOKEN_RING DLT_IEEE802 /* DLT_IEEE802 is used for Token Ring */ -#define LINKTYPE_ARCNET DLT_ARCNET /* BSD-style headers */ -#define LINKTYPE_SLIP DLT_SLIP -#define LINKTYPE_PPP DLT_PPP -#define LINKTYPE_FDDI DLT_FDDI - -/* - * LINKTYPE_PPP is for use when there might, or might not, be an RFC 1662 - * PPP in HDLC-like framing header (with 0xff 0x03 before the PPP protocol - * field) at the beginning of the packet. - * - * This is for use when there is always such a header; the address field - * might be 0xff, for regular PPP, or it might be an address field for Cisco - * point-to-point with HDLC framing as per section 4.3.1 of RFC 1547 ("Cisco - * HDLC"). This is, for example, what you get with NetBSD's DLT_PPP_SERIAL. - * - * We give it the same value as NetBSD's DLT_PPP_SERIAL, in the hopes that - * nobody else will choose a DLT_ value of 50, and so that DLT_PPP_SERIAL - * captures will be written out with a link type that NetBSD's tcpdump - * can read. - */ -#define LINKTYPE_PPP_HDLC 50 /* PPP in HDLC-like framing */ - -#define LINKTYPE_PPP_ETHER 51 /* NetBSD PPP-over-Ethernet */ - -#define LINKTYPE_SYMANTEC_FIREWALL 99 /* Symantec Enterprise Firewall */ - -#define LINKTYPE_ATM_RFC1483 100 /* LLC/SNAP-encapsulated ATM */ -#define LINKTYPE_RAW 101 /* raw IP */ -#define LINKTYPE_SLIP_BSDOS 102 /* BSD/OS SLIP BPF header */ -#define LINKTYPE_PPP_BSDOS 103 /* BSD/OS PPP BPF header */ -#define LINKTYPE_C_HDLC 104 /* Cisco HDLC */ -#define LINKTYPE_IEEE802_11 105 /* IEEE 802.11 (wireless) */ -#define LINKTYPE_ATM_CLIP 106 /* Linux Classical IP over ATM */ -#define LINKTYPE_FRELAY 107 /* Frame Relay */ -#define LINKTYPE_LOOP 108 /* OpenBSD loopback */ -#define LINKTYPE_ENC 109 /* OpenBSD IPSEC enc */ - -/* - * These three types are reserved for future use. - */ -#define LINKTYPE_LANE8023 110 /* ATM LANE + 802.3 */ -#define LINKTYPE_HIPPI 111 /* NetBSD HIPPI */ -#define LINKTYPE_HDLC 112 /* NetBSD HDLC framing */ - -#define LINKTYPE_LINUX_SLL 113 /* Linux cooked socket capture */ -#define LINKTYPE_LTALK 114 /* Apple LocalTalk hardware */ -#define LINKTYPE_ECONET 115 /* Acorn Econet */ - -/* - * Reserved for use with OpenBSD ipfilter. - */ -#define LINKTYPE_IPFILTER 116 - -#define LINKTYPE_PFLOG 117 /* OpenBSD DLT_PFLOG */ -#define LINKTYPE_CISCO_IOS 118 /* For Cisco-internal use */ -#define LINKTYPE_PRISM_HEADER 119 /* 802.11+Prism II monitor mode */ -#define LINKTYPE_AIRONET_HEADER 120 /* FreeBSD Aironet driver stuff */ - -/* - * Reserved for Siemens HiPath HDLC. - */ -#define LINKTYPE_HHDLC 121 - -#define LINKTYPE_IP_OVER_FC 122 /* RFC 2625 IP-over-Fibre Channel */ -#define LINKTYPE_SUNATM 123 /* Solaris+SunATM */ - -/* - * Reserved as per request from Kent Dahlgren <kent@praesum.com> - * for private use. - */ -#define LINKTYPE_RIO 124 /* RapidIO */ -#define LINKTYPE_PCI_EXP 125 /* PCI Express */ -#define LINKTYPE_AURORA 126 /* Xilinx Aurora link layer */ - -#define LINKTYPE_IEEE802_11_RADIO 127 /* 802.11 plus BSD radio header */ - -/* - * Reserved for the TZSP encapsulation, as per request from - * Chris Waters <chris.waters@networkchemistry.com> - * TZSP is a generic encapsulation for any other link type, - * which includes a means to include meta-information - * with the packet, e.g. signal strength and channel - * for 802.11 packets. - */ -#define LINKTYPE_TZSP 128 /* Tazmen Sniffer Protocol */ - -#define LINKTYPE_ARCNET_LINUX 129 /* Linux-style headers */ - -/* - * Juniper-private data link types, as per request from - * Hannes Gredler <hannes@juniper.net>. The corresponding - * DLT_s are used for passing on chassis-internal - * metainformation such as QOS profiles, etc.. - */ -#define LINKTYPE_JUNIPER_MLPPP 130 -#define LINKTYPE_JUNIPER_MLFR 131 -#define LINKTYPE_JUNIPER_ES 132 -#define LINKTYPE_JUNIPER_GGSN 133 -#define LINKTYPE_JUNIPER_MFR 134 -#define LINKTYPE_JUNIPER_ATM2 135 -#define LINKTYPE_JUNIPER_SERVICES 136 -#define LINKTYPE_JUNIPER_ATM1 137 - -#define LINKTYPE_APPLE_IP_OVER_IEEE1394 138 /* Apple IP-over-IEEE 1394 cooked header */ - -#define LINKTYPE_MTP2_WITH_PHDR 139 -#define LINKTYPE_MTP2 140 -#define LINKTYPE_MTP3 141 -#define LINKTYPE_SCCP 142 - -#define LINKTYPE_DOCSIS 143 /* DOCSIS MAC frames */ - -#define LINKTYPE_LINUX_IRDA 144 /* Linux-IrDA */ - -/* - * Reserved for IBM SP switch and IBM Next Federation switch. - */ -#define LINKTYPE_IBM_SP 145 -#define LINKTYPE_IBM_SN 146 - -/* - * Reserved for private use. If you have some link-layer header type - * that you want to use within your organization, with the capture files - * using that link-layer header type not ever be sent outside your - * organization, you can use these values. - * - * No libpcap release will use these for any purpose, nor will any - * tcpdump release use them, either. - * - * Do *NOT* use these in capture files that you expect anybody not using - * your private versions of capture-file-reading tools to read; in - * particular, do *NOT* use them in products, otherwise you may find that - * people won't be able to use tcpdump, or snort, or Ethereal, or... to - * read capture files from your firewall/intrusion detection/traffic - * monitoring/etc. appliance, or whatever product uses that LINKTYPE_ value, - * and you may also find that the developers of those applications will - * not accept patches to let them read those files. - * - * Also, do not use them if somebody might send you a capture using them - * for *their* private type and tools using them for *your* private type - * would have to read them. - * - * Instead, in those cases, ask "tcpdump-workers@lists.tcpdump.org" for a - * new DLT_ and LINKTYPE_ value, as per the comment in pcap/bpf.h, and use - * the type you're given. - */ -#define LINKTYPE_USER0 147 -#define LINKTYPE_USER1 148 -#define LINKTYPE_USER2 149 -#define LINKTYPE_USER3 150 -#define LINKTYPE_USER4 151 -#define LINKTYPE_USER5 152 -#define LINKTYPE_USER6 153 -#define LINKTYPE_USER7 154 -#define LINKTYPE_USER8 155 -#define LINKTYPE_USER9 156 -#define LINKTYPE_USER10 157 -#define LINKTYPE_USER11 158 -#define LINKTYPE_USER12 159 -#define LINKTYPE_USER13 160 -#define LINKTYPE_USER14 161 -#define LINKTYPE_USER15 162 - -/* - * For future use with 802.11 captures - defined by AbsoluteValue - * Systems to store a number of bits of link-layer information - * including radio information: - * - * http://www.shaftnet.org/~pizza/software/capturefrm.txt - * - * but could and arguably should also be used by non-AVS Linux - * 802.11 drivers; that may happen in the future. - */ -#define LINKTYPE_IEEE802_11_RADIO_AVS 163 /* 802.11 plus AVS radio header */ - -/* - * Juniper-private data link type, as per request from - * Hannes Gredler <hannes@juniper.net>. The corresponding - * DLT_s are used for passing on chassis-internal - * metainformation such as QOS profiles, etc.. - */ -#define LINKTYPE_JUNIPER_MONITOR 164 - -/* - * Reserved for BACnet MS/TP. - */ -#define LINKTYPE_BACNET_MS_TP 165 - -/* - * Another PPP variant as per request from Karsten Keil <kkeil@suse.de>. - * - * This is used in some OSes to allow a kernel socket filter to distinguish - * between incoming and outgoing packets, on a socket intended to - * supply pppd with outgoing packets so it can do dial-on-demand and - * hangup-on-lack-of-demand; incoming packets are filtered out so they - * don't cause pppd to hold the connection up (you don't want random - * input packets such as port scans, packets from old lost connections, - * etc. to force the connection to stay up). - * - * The first byte of the PPP header (0xff03) is modified to accomodate - * the direction - 0x00 = IN, 0x01 = OUT. - */ -#define LINKTYPE_PPP_PPPD 166 - -/* - * Juniper-private data link type, as per request from - * Hannes Gredler <hannes@juniper.net>. The DLT_s are used - * for passing on chassis-internal metainformation such as - * QOS profiles, cookies, etc.. - */ -#define LINKTYPE_JUNIPER_PPPOE 167 -#define LINKTYPE_JUNIPER_PPPOE_ATM 168 - -#define LINKTYPE_GPRS_LLC 169 /* GPRS LLC */ -#define LINKTYPE_GPF_T 170 /* GPF-T (ITU-T G.7041/Y.1303) */ -#define LINKTYPE_GPF_F 171 /* GPF-T (ITU-T G.7041/Y.1303) */ - -/* - * Requested by Oolan Zimmer <oz@gcom.com> for use in Gcom's T1/E1 line - * monitoring equipment. - */ -#define LINKTYPE_GCOM_T1E1 172 -#define LINKTYPE_GCOM_SERIAL 173 - -/* - * Juniper-private data link type, as per request from - * Hannes Gredler <hannes@juniper.net>. The DLT_ is used - * for internal communication to Physical Interface Cards (PIC) - */ -#define LINKTYPE_JUNIPER_PIC_PEER 174 - -/* - * Link types requested by Gregor Maier <gregor@endace.com> of Endace - * Measurement Systems. They add an ERF header (see - * http://www.endace.com/support/EndaceRecordFormat.pdf) in front of - * the link-layer header. - */ -#define LINKTYPE_ERF_ETH 175 /* Ethernet */ -#define LINKTYPE_ERF_POS 176 /* Packet-over-SONET */ - -/* - * Requested by Daniele Orlandi <daniele@orlandi.com> for raw LAPD - * for vISDN (http://www.orlandi.com/visdn/). Its link-layer header - * includes additional information before the LAPD header, so it's - * not necessarily a generic LAPD header. - */ -#define LINKTYPE_LINUX_LAPD 177 - -/* - * Juniper-private data link type, as per request from - * Hannes Gredler <hannes@juniper.net>. - * The Link Types are used for prepending meta-information - * like interface index, interface name - * before standard Ethernet, PPP, Frelay & C-HDLC Frames - */ -#define LINKTYPE_JUNIPER_ETHER 178 -#define LINKTYPE_JUNIPER_PPP 179 -#define LINKTYPE_JUNIPER_FRELAY 180 -#define LINKTYPE_JUNIPER_CHDLC 181 - -/* - * Multi Link Frame Relay (FRF.16) - */ -#define LINKTYPE_MFR 182 - -/* - * Juniper-private data link type, as per request from - * Hannes Gredler <hannes@juniper.net>. - * The DLT_ is used for internal communication with a - * voice Adapter Card (PIC) - */ -#define LINKTYPE_JUNIPER_VP 183 - -/* - * Arinc 429 frames. - * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. - * Every frame contains a 32bit A429 label. - * More documentation on Arinc 429 can be found at - * http://www.condoreng.com/support/downloads/tutorials/ARINCTutorial.pdf - */ -#define LINKTYPE_A429 184 - -/* - * Arinc 653 Interpartition Communication messages. - * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. - * Please refer to the A653-1 standard for more information. - */ -#define LINKTYPE_A653_ICM 185 - -/* - * USB packets, beginning with a USB setup header; requested by - * Paolo Abeni <paolo.abeni@email.it>. - */ -#define LINKTYPE_USB 186 - -/* - * Bluetooth HCI UART transport layer (part H:4); requested by - * Paolo Abeni. - */ -#define LINKTYPE_BLUETOOTH_HCI_H4 187 - -/* - * IEEE 802.16 MAC Common Part Sublayer; requested by Maria Cruz - * <cruz_petagay@bah.com>. - */ -#define LINKTYPE_IEEE802_16_MAC_CPS 188 - -/* - * USB packets, beginning with a Linux USB header; requested by - * Paolo Abeni <paolo.abeni@email.it>. - */ -#define LINKTYPE_USB_LINUX 189 - -/* - * Controller Area Network (CAN) v. 2.0B packets. - * DLT_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. - * Used to dump CAN packets coming from a CAN Vector board. - * More documentation on the CAN v2.0B frames can be found at - * http://www.can-cia.org/downloads/?269 - */ -#define LINKTYPE_CAN20B 190 - -/* - * IEEE 802.15.4, with address fields padded, as is done by Linux - * drivers; requested by Juergen Schimmer. - */ -#define LINKTYPE_IEEE802_15_4_LINUX 191 - -/* - * Per Packet Information encapsulated packets. - * LINKTYPE_ requested by Gianluca Varenni <gianluca.varenni@cacetech.com>. - */ -#define LINKTYPE_PPI 192 - -/* - * Header for 802.16 MAC Common Part Sublayer plus a radiotap radio header; - * requested by Charles Clancy. - */ -#define LINKTYPE_IEEE802_16_MAC_CPS_RADIO 193 - -/* - * Juniper-private data link type, as per request from - * Hannes Gredler <hannes@juniper.net>. - * The DLT_ is used for internal communication with a - * integrated service module (ISM). - */ -#define LINKTYPE_JUNIPER_ISM 194 - -/* - * IEEE 802.15.4, exactly as it appears in the spec (no padding, no - * nothing); requested by Mikko Saarnivala <mikko.saarnivala@sensinode.com>. - */ -#define LINKTYPE_IEEE802_15_4 195 - -/* - * Various link-layer types, with a pseudo-header, for SITA - * (http://www.sita.aero/); requested by Fulko Hew (fulko.hew@gmail.com). - */ -#define LINKTYPE_SITA 196 - -/* - * Various link-layer types, with a pseudo-header, for Endace DAG cards; - * encapsulates Endace ERF records. Requested by Stephen Donnelly - * <stephen@endace.com>. - */ -#define LINKTYPE_ERF 197 - -/* - * Special header prepended to Ethernet packets when capturing from a - * u10 Networks board. Requested by Phil Mulholland - * <phil@u10networks.com>. - */ -#define LINKTYPE_RAIF1 198 - -/* - * IPMB packet for IPMI, beginning with the I2C slave address, followed - * by the netFn and LUN, etc.. Requested by Chanthy Toeung - * <chanthy.toeung@ca.kontron.com>. - */ -#define LINKTYPE_IPMB 199 - -/* - * Juniper-private data link type, as per request from - * Hannes Gredler <hannes@juniper.net>. - * The DLT_ is used for capturing data on a secure tunnel interface. - */ -#define LINKTYPE_JUNIPER_ST 200 - -/* - * Bluetooth HCI UART transport layer (part H:4), with pseudo-header - * that includes direction information; requested by Paolo Abeni. - */ -#define LINKTYPE_BLUETOOTH_HCI_H4_WITH_PHDR 201 - -/* - * AX.25 packet with a 1-byte KISS header; see - * - * http://www.ax25.net/kiss.htm - * - * as per Richard Stearn <richard@rns-stearn.demon.co.uk>. - */ -#define LINKTYPE_AX25_KISS 202 - -/* - * LAPD packets from an ISDN channel, starting with the address field, - * with no pseudo-header. - * Requested by Varuna De Silva <varunax@gmail.com>. - */ -#define LINKTYPE_LAPD 203 - -/* - * Variants of various link-layer headers, with a one-byte direction - * pseudo-header prepended - zero means "received by this host", - * non-zero (any non-zero value) means "sent by this host" - as per - * Will Barker <w.barker@zen.co.uk>. - */ -#define LINKTYPE_PPP_WITH_DIR 204 /* PPP */ -#define LINKTYPE_C_HDLC_WITH_DIR 205 /* Cisco HDLC */ -#define LINKTYPE_FRELAY_WITH_DIR 206 /* Frame Relay */ -#define LINKTYPE_LAPB_WITH_DIR 207 /* LAPB */ - -/* - * 208 is reserved for an as-yet-unspecified proprietary link-layer - * type, as requested by Will Barker. - */ - -/* - * IPMB with a Linux-specific pseudo-header; as requested by Alexey Neyman - * <avn@pigeonpoint.com>. - */ -#define LINKTYPE_IPMB_LINUX 209 - -/* - * FlexRay automotive bus - http://www.flexray.com/ - as requested - * by Hannes Kaelber <hannes.kaelber@x2e.de>. - */ -#define LINKTYPE_FLEXRAY 210 - -/* - * Media Oriented Systems Transport (MOST) bus for multimedia - * transport - http://www.mostcooperation.com/ - as requested - * by Hannes Kaelber <hannes.kaelber@x2e.de>. - */ -#define LINKTYPE_MOST 211 - -/* - * Local Interconnect Network (LIN) bus for vehicle networks - - * http://www.lin-subbus.org/ - as requested by Hannes Kaelber - * <hannes.kaelber@x2e.de>. - */ -#define LINKTYPE_LIN 212 - -/* - * X2E-private data link type used for serial line capture, - * as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. - */ -#define LINKTYPE_X2E_SERIAL 213 - -/* - * X2E-private data link type used for the Xoraya data logger - * family, as requested by Hannes Kaelber <hannes.kaelber@x2e.de>. - */ -#define LINKTYPE_X2E_XORAYA 214 - -/* - * IEEE 802.15.4, exactly as it appears in the spec (no padding, no - * nothing), but with the PHY-level data for non-ASK PHYs (4 octets - * of 0 as preamble, one octet of SFD, one octet of frame length+ - * reserved bit, and then the MAC-layer data, starting with the - * frame control field). - * - * Requested by Max Filippov <jcmvbkbc@gmail.com>. - */ -#define LINKTYPE_IEEE802_15_4_NONASK_PHY 215 - - -static struct linktype_map { - int dlt; - int linktype; -} map[] = { - /* - * These DLT_* codes have LINKTYPE_* codes with values identical - * to the values of the corresponding DLT_* code. - */ - { DLT_NULL, LINKTYPE_NULL }, - { DLT_EN10MB, LINKTYPE_ETHERNET }, - { DLT_EN3MB, LINKTYPE_EXP_ETHERNET }, - { DLT_AX25, LINKTYPE_AX25 }, - { DLT_PRONET, LINKTYPE_PRONET }, - { DLT_CHAOS, LINKTYPE_CHAOS }, - { DLT_IEEE802, LINKTYPE_TOKEN_RING }, - { DLT_ARCNET, LINKTYPE_ARCNET }, - { DLT_SLIP, LINKTYPE_SLIP }, - { DLT_PPP, LINKTYPE_PPP }, - { DLT_FDDI, LINKTYPE_FDDI }, - - /* - * These DLT_* codes have different values on different - * platforms; we map them to LINKTYPE_* codes that - * have values that should never be equal to any DLT_* - * code. - */ -#ifdef DLT_FR - /* BSD/OS Frame Relay */ - { DLT_FR, LINKTYPE_FRELAY }, -#endif - - { DLT_SYMANTEC_FIREWALL, LINKTYPE_SYMANTEC_FIREWALL }, - { DLT_ATM_RFC1483, LINKTYPE_ATM_RFC1483 }, - { DLT_RAW, LINKTYPE_RAW }, - { DLT_SLIP_BSDOS, LINKTYPE_SLIP_BSDOS }, - { DLT_PPP_BSDOS, LINKTYPE_PPP_BSDOS }, - - /* BSD/OS Cisco HDLC */ - { DLT_C_HDLC, LINKTYPE_C_HDLC }, - - /* - * These DLT_* codes are not on all platforms, but, so far, - * there don't appear to be any platforms that define - * other codes with those values; we map them to - * different LINKTYPE_* values anyway, just in case. - */ - - /* Linux ATM Classical IP */ - { DLT_ATM_CLIP, LINKTYPE_ATM_CLIP }, - - /* NetBSD sync/async serial PPP (or Cisco HDLC) */ - { DLT_PPP_SERIAL, LINKTYPE_PPP_HDLC }, - - /* NetBSD PPP over Ethernet */ - { DLT_PPP_ETHER, LINKTYPE_PPP_ETHER }, - - /* IEEE 802.11 wireless */ - { DLT_IEEE802_11, LINKTYPE_IEEE802_11 }, - - /* Frame Relay */ - { DLT_FRELAY, LINKTYPE_FRELAY }, - - /* OpenBSD loopback */ - { DLT_LOOP, LINKTYPE_LOOP }, - - /* Linux cooked socket capture */ - { DLT_LINUX_SLL, LINKTYPE_LINUX_SLL }, - - /* Apple LocalTalk hardware */ - { DLT_LTALK, LINKTYPE_LTALK }, - - /* Acorn Econet */ - { DLT_ECONET, LINKTYPE_ECONET }, - - /* OpenBSD DLT_PFLOG */ - { DLT_PFLOG, LINKTYPE_PFLOG }, - - /* For Cisco-internal use */ - { DLT_CISCO_IOS, LINKTYPE_CISCO_IOS }, - - /* Prism II monitor-mode header plus 802.11 header */ - { DLT_PRISM_HEADER, LINKTYPE_PRISM_HEADER }, - - /* FreeBSD Aironet driver stuff */ - { DLT_AIRONET_HEADER, LINKTYPE_AIRONET_HEADER }, - - /* Siemens HiPath HDLC */ - { DLT_HHDLC, LINKTYPE_HHDLC }, - - /* RFC 2625 IP-over-Fibre Channel */ - { DLT_IP_OVER_FC, LINKTYPE_IP_OVER_FC }, - - /* Solaris+SunATM */ - { DLT_SUNATM, LINKTYPE_SUNATM }, - - /* RapidIO */ - { DLT_RIO, LINKTYPE_RIO }, - - /* PCI Express */ - { DLT_PCI_EXP, LINKTYPE_PCI_EXP }, - - /* Xilinx Aurora link layer */ - { DLT_AURORA, LINKTYPE_AURORA }, - - /* 802.11 plus BSD radio header */ - { DLT_IEEE802_11_RADIO, LINKTYPE_IEEE802_11_RADIO }, - - /* Tazmen Sniffer Protocol */ - { DLT_TZSP, LINKTYPE_TZSP }, - - /* Arcnet with Linux-style link-layer headers */ - { DLT_ARCNET_LINUX, LINKTYPE_ARCNET_LINUX }, - - /* Juniper-internal chassis encapsulation */ - { DLT_JUNIPER_MLPPP, LINKTYPE_JUNIPER_MLPPP }, - { DLT_JUNIPER_MLFR, LINKTYPE_JUNIPER_MLFR }, - { DLT_JUNIPER_ES, LINKTYPE_JUNIPER_ES }, - { DLT_JUNIPER_GGSN, LINKTYPE_JUNIPER_GGSN }, - { DLT_JUNIPER_MFR, LINKTYPE_JUNIPER_MFR }, - { DLT_JUNIPER_ATM2, LINKTYPE_JUNIPER_ATM2 }, - { DLT_JUNIPER_SERVICES, LINKTYPE_JUNIPER_SERVICES }, - { DLT_JUNIPER_ATM1, LINKTYPE_JUNIPER_ATM1 }, - - /* Apple IP-over-IEEE 1394 cooked header */ - { DLT_APPLE_IP_OVER_IEEE1394, LINKTYPE_APPLE_IP_OVER_IEEE1394 }, - - /* SS7 */ - { DLT_MTP2_WITH_PHDR, LINKTYPE_MTP2_WITH_PHDR }, - { DLT_MTP2, LINKTYPE_MTP2 }, - { DLT_MTP3, LINKTYPE_MTP3 }, - { DLT_SCCP, LINKTYPE_SCCP }, - - /* DOCSIS MAC frames */ - { DLT_DOCSIS, LINKTYPE_DOCSIS }, - - /* IrDA IrLAP packets + Linux-cooked header */ - { DLT_LINUX_IRDA, LINKTYPE_LINUX_IRDA }, - - /* IBM SP and Next Federation switches */ - { DLT_IBM_SP, LINKTYPE_IBM_SP }, - { DLT_IBM_SN, LINKTYPE_IBM_SN }, - - /* 802.11 plus AVS radio header */ - { DLT_IEEE802_11_RADIO_AVS, LINKTYPE_IEEE802_11_RADIO_AVS }, - - /* - * Any platform that defines additional DLT_* codes should: - * - * request a LINKTYPE_* code and value from tcpdump.org, - * as per the above; - * - * add, in their version of libpcap, an entry to map - * those DLT_* codes to the corresponding LINKTYPE_* - * code; - * - * redefine, in their "net/bpf.h", any DLT_* values - * that collide with the values used by their additional - * DLT_* codes, to remove those collisions (but without - * making them collide with any of the LINKTYPE_* - * values equal to 50 or above; they should also avoid - * defining DLT_* values that collide with those - * LINKTYPE_* values, either). - */ - - /* Juniper-internal chassis encapsulation */ - { DLT_JUNIPER_MONITOR, LINKTYPE_JUNIPER_MONITOR }, - - /* BACnet MS/TP */ - { DLT_BACNET_MS_TP, LINKTYPE_BACNET_MS_TP }, - - /* PPP for pppd, with direction flag in the PPP header */ - { DLT_PPP_PPPD, LINKTYPE_PPP_PPPD}, - - /* Juniper-internal chassis encapsulation */ - { DLT_JUNIPER_PPPOE, LINKTYPE_JUNIPER_PPPOE }, - { DLT_JUNIPER_PPPOE_ATM,LINKTYPE_JUNIPER_PPPOE_ATM }, - - /* GPRS LLC */ - { DLT_GPRS_LLC, LINKTYPE_GPRS_LLC }, - - /* Transparent Generic Framing Procedure (ITU-T G.7041/Y.1303) */ - { DLT_GPF_T, LINKTYPE_GPF_T }, - - /* Framed Generic Framing Procedure (ITU-T G.7041/Y.1303) */ - { DLT_GPF_F, LINKTYPE_GPF_F }, - - { DLT_GCOM_T1E1, LINKTYPE_GCOM_T1E1 }, - { DLT_GCOM_SERIAL, LINKTYPE_GCOM_SERIAL }, - - /* Juniper-internal chassis encapsulation */ - { DLT_JUNIPER_PIC_PEER, LINKTYPE_JUNIPER_PIC_PEER }, - - /* Endace types */ - { DLT_ERF_ETH, LINKTYPE_ERF_ETH }, - { DLT_ERF_POS, LINKTYPE_ERF_POS }, - - /* viSDN LAPD */ - { DLT_LINUX_LAPD, LINKTYPE_LINUX_LAPD }, - - /* Juniper meta-information before Ether, PPP, Frame Relay, C-HDLC Frames */ - { DLT_JUNIPER_ETHER, LINKTYPE_JUNIPER_ETHER }, - { DLT_JUNIPER_PPP, LINKTYPE_JUNIPER_PPP }, - { DLT_JUNIPER_FRELAY, LINKTYPE_JUNIPER_FRELAY }, - { DLT_JUNIPER_CHDLC, LINKTYPE_JUNIPER_CHDLC }, - - /* Multi Link Frame Relay (FRF.16) */ - { DLT_MFR, LINKTYPE_MFR }, - - /* Juniper Voice PIC */ - { DLT_JUNIPER_VP, LINKTYPE_JUNIPER_VP }, - - /* Controller Area Network (CAN) v2.0B */ - { DLT_A429, LINKTYPE_A429 }, - - /* Arinc 653 Interpartition Communication messages */ - { DLT_A653_ICM, LINKTYPE_A653_ICM }, - - /* USB */ - { DLT_USB, LINKTYPE_USB }, - - /* Bluetooth HCI UART transport layer */ - { DLT_BLUETOOTH_HCI_H4, LINKTYPE_BLUETOOTH_HCI_H4 }, - - /* IEEE 802.16 MAC Common Part Sublayer */ - { DLT_IEEE802_16_MAC_CPS, LINKTYPE_IEEE802_16_MAC_CPS }, - - /* USB with Linux header */ - { DLT_USB_LINUX, LINKTYPE_USB_LINUX }, - - /* Controller Area Network (CAN) v2.0B */ - { DLT_CAN20B, LINKTYPE_CAN20B }, - - /* IEEE 802.15.4 with address fields padded */ - { DLT_IEEE802_15_4_LINUX, LINKTYPE_IEEE802_15_4_LINUX }, - - /* Per Packet Information encapsulated packets */ - { DLT_PPI, LINKTYPE_PPI }, - - /* IEEE 802.16 MAC Common Part Sublayer plus radiotap header */ - { DLT_IEEE802_16_MAC_CPS_RADIO, LINKTYPE_IEEE802_16_MAC_CPS_RADIO }, - - /* Juniper Voice ISM */ - { DLT_JUNIPER_ISM, LINKTYPE_JUNIPER_ISM }, - - /* IEEE 802.15.4 exactly as it appears in the spec */ - { DLT_IEEE802_15_4, LINKTYPE_IEEE802_15_4 }, - - /* Various link-layer types for SITA */ - { DLT_SITA, LINKTYPE_SITA }, - - /* Various link-layer types for Endace */ - { DLT_ERF, LINKTYPE_ERF }, - - /* Special header for u10 Networks boards */ - { DLT_RAIF1, LINKTYPE_RAIF1 }, - - /* IPMB */ - { DLT_IPMB, LINKTYPE_IPMB }, - - /* Juniper Secure Tunnel */ - { DLT_JUNIPER_ST, LINKTYPE_JUNIPER_ST }, - - /* Bluetooth HCI UART transport layer, with pseudo-header */ - { DLT_BLUETOOTH_HCI_H4_WITH_PHDR, LINKTYPE_BLUETOOTH_HCI_H4_WITH_PHDR }, - - /* AX.25 with KISS header */ - { DLT_AX25_KISS, LINKTYPE_AX25_KISS }, - - /* Raw LAPD, with no pseudo-header */ - { DLT_LAPD, LINKTYPE_LAPD }, - - /* PPP with one-byte pseudo-header giving direction */ - { DLT_PPP_WITH_DIR, LINKTYPE_PPP_WITH_DIR }, - - /* Cisco HDLC with one-byte pseudo-header giving direction */ - { DLT_C_HDLC_WITH_DIR, LINKTYPE_C_HDLC_WITH_DIR }, - - /* Frame Relay with one-byte pseudo-header giving direction */ - { DLT_FRELAY_WITH_DIR, LINKTYPE_FRELAY_WITH_DIR }, - - /* LAPB with one-byte pseudo-header giving direction */ - { DLT_LAPB_WITH_DIR, LINKTYPE_LAPB_WITH_DIR }, - - /* IPMB with Linux pseudo-header */ - { DLT_IPMB_LINUX, LINKTYPE_IPMB_LINUX }, - - /* FlexRay */ - { DLT_FLEXRAY, LINKTYPE_FLEXRAY }, - - /* MOST */ - { DLT_MOST, LINKTYPE_MOST }, - - /* LIN */ - { DLT_LIN, LINKTYPE_LIN }, - - /* X2E-private serial line capture */ - { DLT_X2E_SERIAL, LINKTYPE_X2E_SERIAL }, - - /* X2E-private for Xoraya data logger family */ - { DLT_X2E_XORAYA, LINKTYPE_X2E_XORAYA }, - - /* IEEE 802.15.4 with PHY data for non-ASK PHYs */ - { DLT_IEEE802_15_4_NONASK_PHY, LINKTYPE_IEEE802_15_4_NONASK_PHY }, - - { -1, -1 } -}; - -/* - * Mechanism for storing information about a capture in the upper - * 6 bits of a linktype value in a capture file. - * - * LT_LINKTYPE_EXT(x) extracts the additional information. - * - * The rest of the bits are for a value describing the link-layer - * value. LT_LINKTYPE(x) extracts that value. - */ -#define LT_LINKTYPE(x) ((x) & 0x03FFFFFF) -#define LT_LINKTYPE_EXT(x) ((x) & 0xFC000000) - -static int -dlt_to_linktype(int dlt) -{ - int i; - - for (i = 0; map[i].dlt != -1; i++) { - if (map[i].dlt == dlt) - return (map[i].linktype); - } - - /* - * If we don't have a mapping for this DLT_ code, return an - * error; that means that the table above needs to have an - * entry added. - */ - return (-1); -} - -static int -linktype_to_dlt(int linktype) -{ - int i; - - for (i = 0; map[i].linktype != -1; i++) { - if (map[i].linktype == linktype) - return (map[i].dlt); - } - - /* - * If we don't have an entry for this link type, return - * the link type value; it may be a DLT_ value from an - * older version of libpcap. - */ - return linktype; -} - -static int -sf_write_header(FILE *fp, int linktype, int thiszone, int snaplen) -{ - struct pcap_file_header hdr; - - hdr.magic = TCPDUMP_MAGIC; - hdr.version_major = PCAP_VERSION_MAJOR; - hdr.version_minor = PCAP_VERSION_MINOR; - - hdr.thiszone = thiszone; - hdr.snaplen = snaplen; - hdr.sigfigs = 0; - hdr.linktype = linktype; - - if (fwrite((char *)&hdr, sizeof(hdr), 1, fp) != 1) - return (-1); - - return (0); -} - -static void -swap_hdr(struct pcap_file_header *hp) -{ - hp->version_major = SWAPSHORT(hp->version_major); - hp->version_minor = SWAPSHORT(hp->version_minor); - hp->thiszone = SWAPLONG(hp->thiszone); - hp->sigfigs = SWAPLONG(hp->sigfigs); - hp->snaplen = SWAPLONG(hp->snaplen); - hp->linktype = SWAPLONG(hp->linktype); -} - static int sf_getnonblock(pcap_t *p, char *errbuf) { @@ -1113,8 +159,8 @@ sf_cleanup(pcap_t *p) { if (p->sf.rfile != stdin) (void)fclose(p->sf.rfile); - if (p->sf.base != NULL) - free(p->sf.base); + if (p->buffer != NULL) + free(p->buffer); } pcap_t * @@ -1178,6 +224,13 @@ pcap_t* pcap_hopen_offline(intptr_t osfd, char *errbuf) } #endif +static int (*check_headers[])(pcap_t *, bpf_u_int32, FILE *, char *) = { + pcap_check_header, + pcap_ng_check_header +}; + +#define N_FILE_TYPES (sizeof check_headers / sizeof check_headers[0]) + #ifdef WIN32 static #endif @@ -1185,21 +238,23 @@ pcap_t * pcap_fopen_offline(FILE *fp, char *errbuf) { register pcap_t *p; - struct pcap_file_header hdr; - size_t amt_read; bpf_u_int32 magic; - int linklen; + size_t amt_read; + u_int i; - p = (pcap_t *)malloc(sizeof(*p)); - if (p == NULL) { - strlcpy(errbuf, "out of swap", PCAP_ERRBUF_SIZE); + p = pcap_create_common("(savefile)", errbuf); + if (p == NULL) return (NULL); - } - - memset((char *)p, 0, sizeof(*p)); - amt_read = fread((char *)&hdr, 1, sizeof(hdr), fp); - if (amt_read != sizeof(hdr)) { + /* + * Read the first 4 bytes of the file; the network analyzer dump + * file formats we support (pcap and pcap-ng), and several other + * formats we might support in the future (such as snoop, DOS and + * Windows Sniffer, and Microsoft Network Monitor) all have magic + * numbers that are unique in their first 4 bytes. + */ + amt_read = fread((char *)&magic, 1, sizeof(magic), fp); + if (amt_read != sizeof(magic)) { if (ferror(fp)) { snprintf(errbuf, PCAP_ERRBUF_SIZE, "error reading dump file: %s", @@ -1207,144 +262,46 @@ pcap_fopen_offline(FILE *fp, char *errbuf) } else { snprintf(errbuf, PCAP_ERRBUF_SIZE, "truncated dump file; tried to read %lu file header bytes, only got %lu", - (unsigned long)sizeof(hdr), + (unsigned long)sizeof(magic), (unsigned long)amt_read); } goto bad; } - magic = hdr.magic; - if (magic != TCPDUMP_MAGIC && magic != KUZNETZOV_TCPDUMP_MAGIC) { - magic = SWAPLONG(magic); - if (magic != TCPDUMP_MAGIC && magic != KUZNETZOV_TCPDUMP_MAGIC) { - snprintf(errbuf, PCAP_ERRBUF_SIZE, - "bad dump file format"); + + /* + * Try all file types. + */ + for (i = 0; i < N_FILE_TYPES; i++) { + switch ((*check_headers[i])(p, magic, fp, errbuf)) { + + case -1: + /* + * Error trying to read the header. + */ goto bad; + + case 1: + /* + * Yup, that's it. + */ + goto found; } - p->sf.swapped = 1; - swap_hdr(&hdr); } - if (magic == KUZNETZOV_TCPDUMP_MAGIC) { - /* - * XXX - the patch that's in some versions of libpcap - * changes the packet header but not the magic number, - * and some other versions with this magic number have - * some extra debugging information in the packet header; - * we'd have to use some hacks^H^H^H^H^Hheuristics to - * detect those variants. - * - * Ethereal does that, but it does so by trying to read - * the first two packets of the file with each of the - * record header formats. That currently means it seeks - * backwards and retries the reads, which doesn't work - * on pipes. We want to be able to read from a pipe, so - * that strategy won't work; we'd have to buffer some - * data ourselves and read from that buffer in order to - * make that work. - */ - p->sf.hdrsize = sizeof(struct pcap_sf_patched_pkthdr); - } else - p->sf.hdrsize = sizeof(struct pcap_sf_pkthdr); - if (hdr.version_major < PCAP_VERSION_MAJOR) { - snprintf(errbuf, PCAP_ERRBUF_SIZE, "archaic file format"); - goto bad; - } - p->tzoff = hdr.thiszone; - p->snapshot = hdr.snaplen; - p->linktype = linktype_to_dlt(LT_LINKTYPE(hdr.linktype)); - p->linktype_ext = LT_LINKTYPE_EXT(hdr.linktype); - if (magic == KUZNETZOV_TCPDUMP_MAGIC && p->linktype == DLT_EN10MB) { - /* - * This capture might have been done in raw mode or cooked - * mode. - * - * If it was done in cooked mode, p->snapshot was passed - * to recvfrom() as the buffer size, meaning that the - * most packet data that would be copied would be - * p->snapshot. However, a faked Ethernet header would - * then have been added to it, so the most data that would - * be in a packet in the file would be p->snapshot + 14. - * - * We can't easily tell whether the capture was done in - * raw mode or cooked mode, so we'll assume it was - * cooked mode, and add 14 to the snapshot length. That - * means that, for a raw capture, the snapshot length will - * be misleading if you use it to figure out why a capture - * doesn't have all the packet data, but there's not much - * we can do to avoid that. - */ - p->snapshot += 14; - } - p->sf.rfile = fp; -#ifndef WIN32 - p->bufsize = hdr.snaplen; -#else - /* Allocate the space for pcap_pkthdr as well. It will be used by pcap_read_ex */ - p->bufsize = hdr.snaplen+sizeof(struct pcap_pkthdr); -#endif - /* Align link header as required for proper data alignment */ - /* XXX should handle all types */ - switch (p->linktype) { - - case DLT_EN10MB: - linklen = 14; - break; - - case DLT_FDDI: - linklen = 13 + 8; /* fddi_header + llc */ - break; + /* + * Well, who knows what this mess is.... + */ + snprintf(errbuf, PCAP_ERRBUF_SIZE, "unknown file format"); + goto bad; - case DLT_NULL: - default: - linklen = 0; - break; - } +found: + p->sf.rfile = fp; - if (p->bufsize < 0) - p->bufsize = BPF_MAXBUFSIZE; - p->sf.base = (u_char *)malloc(p->bufsize + BPF_ALIGNMENT); - if (p->sf.base == NULL) { - strlcpy(errbuf, "out of swap", PCAP_ERRBUF_SIZE); - goto bad; - } - p->buffer = p->sf.base + BPF_ALIGNMENT - (linklen % BPF_ALIGNMENT); - p->sf.version_major = hdr.version_major; - p->sf.version_minor = hdr.version_minor; #ifdef PCAP_FDDIPAD /* Padding only needed for live capture fcode */ p->fddipad = 0; #endif - /* - * We interchanged the caplen and len fields at version 2.3, - * in order to match the bpf header layout. But unfortunately - * some files were written with version 2.3 in their headers - * but without the interchanged fields. - * - * In addition, DG/UX tcpdump writes out files with a version - * number of 543.0, and with the caplen and len fields in the - * pre-2.3 order. - */ - switch (hdr.version_major) { - - case 2: - if (hdr.version_minor < 3) - p->sf.lengths_swapped = SWAPPED; - else if (hdr.version_minor == 3) - p->sf.lengths_swapped = MAYBE_SWAPPED; - else - p->sf.lengths_swapped = NOT_SWAPPED; - break; - - case 543: - p->sf.lengths_swapped = SWAPPED; - break; - - default: - p->sf.lengths_swapped = NOT_SWAPPED; - break; - } - #if !defined(WIN32) && !defined(MSDOS) /* * You can do "select()" and "poll()" on plain files on most @@ -1379,190 +336,8 @@ pcap_fopen_offline(FILE *fp, char *errbuf) } /* - * Read sf_readfile and return the next packet. Return the header in hdr - * and the contents in buf. Return 0 on success, SFERR_EOF if there were - * no more packets, and SFERR_TRUNC if a partial packet was encountered. - */ -static int -sf_next_packet(pcap_t *p, struct pcap_pkthdr *hdr, u_char *buf, u_int buflen) -{ - struct pcap_sf_patched_pkthdr sf_hdr; - FILE *fp = p->sf.rfile; - size_t amt_read; - bpf_u_int32 t; - - /* - * Read the packet header; the structure we use as a buffer - * is the longer structure for files generated by the patched - * libpcap, but if the file has the magic number for an - * unpatched libpcap we only read as many bytes as the regular - * header has. - */ - amt_read = fread(&sf_hdr, 1, p->sf.hdrsize, fp); - if (amt_read != p->sf.hdrsize) { - if (ferror(fp)) { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "error reading dump file: %s", - pcap_strerror(errno)); - return (-1); - } else { - if (amt_read != 0) { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "truncated dump file; tried to read %lu header bytes, only got %lu", - (unsigned long)p->sf.hdrsize, - (unsigned long)amt_read); - return (-1); - } - /* EOF */ - return (1); - } - } - - if (p->sf.swapped) { - /* these were written in opposite byte order */ - hdr->caplen = SWAPLONG(sf_hdr.caplen); - hdr->len = SWAPLONG(sf_hdr.len); - hdr->ts.tv_sec = SWAPLONG(sf_hdr.ts.tv_sec); - hdr->ts.tv_usec = SWAPLONG(sf_hdr.ts.tv_usec); - } else { - hdr->caplen = sf_hdr.caplen; - hdr->len = sf_hdr.len; - hdr->ts.tv_sec = sf_hdr.ts.tv_sec; - hdr->ts.tv_usec = sf_hdr.ts.tv_usec; - } - /* Swap the caplen and len fields, if necessary. */ - switch (p->sf.lengths_swapped) { - - case NOT_SWAPPED: - break; - - case MAYBE_SWAPPED: - if (hdr->caplen <= hdr->len) { - /* - * The captured length is <= the actual length, - * so presumably they weren't swapped. - */ - break; - } - /* FALLTHROUGH */ - - case SWAPPED: - t = hdr->caplen; - hdr->caplen = hdr->len; - hdr->len = t; - break; - } - - if (hdr->caplen > buflen) { - /* - * This can happen due to Solaris 2.3 systems tripping - * over the BUFMOD problem and not setting the snapshot - * correctly in the savefile header. If the caplen isn't - * grossly wrong, try to salvage. - */ - static u_char *tp = NULL; - static size_t tsize = 0; - - if (hdr->caplen > 65535) { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "bogus savefile header"); - return (-1); - } - - if (tsize < hdr->caplen) { - tsize = ((hdr->caplen + 1023) / 1024) * 1024; - if (tp != NULL) - free((u_char *)tp); - tp = (u_char *)malloc(tsize); - if (tp == NULL) { - tsize = 0; - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "BUFMOD hack malloc"); - return (-1); - } - } - amt_read = fread((char *)tp, 1, hdr->caplen, fp); - if (amt_read != hdr->caplen) { - if (ferror(fp)) { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "error reading dump file: %s", - pcap_strerror(errno)); - } else { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "truncated dump file; tried to read %u captured bytes, only got %lu", - hdr->caplen, (unsigned long)amt_read); - } - return (-1); - } - /* - * We can only keep up to buflen bytes. Since caplen > buflen - * is exactly how we got here, we know we can only keep the - * first buflen bytes and must drop the remainder. Adjust - * caplen accordingly, so we don't get confused later as - * to how many bytes we have to play with. - */ - hdr->caplen = buflen; - memcpy((char *)buf, (char *)tp, buflen); - - } else { - /* read the packet itself */ - amt_read = fread((char *)buf, 1, hdr->caplen, fp); - if (amt_read != hdr->caplen) { - if (ferror(fp)) { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "error reading dump file: %s", - pcap_strerror(errno)); - } else { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "truncated dump file; tried to read %u captured bytes, only got %lu", - hdr->caplen, (unsigned long)amt_read); - } - return (-1); - } - } - - /* - * The DLT_USB_LINUX header is in host byte order when capturing - * (it's supplied directly from a memory-mapped buffer shared - * by the kernel). - * - * When reading a DLT_USB_LINUX capture file, we need to convert - * it from the capturing host's byte order to the reading host's - * byte order. - */ - if (p->sf.swapped && p->linktype == DLT_USB_LINUX) { - pcap_usb_header* uhdr = (pcap_usb_header*) buf; - /* - * The URB id is a totally opaque value; do we really need to - * converte it to the reading host's byte order??? - */ - if (hdr->caplen < 8) - return 0; - uhdr->id = SWAPLL(uhdr->id); - if (hdr->caplen < 14) - return 0; - uhdr->bus_id = SWAPSHORT(uhdr->bus_id); - if (hdr->caplen < 24) - return 0; - uhdr->ts_sec = SWAPLL(uhdr->ts_sec); - if (hdr->caplen < 28) - return 0; - uhdr->ts_usec = SWAPLONG(uhdr->ts_usec); - if (hdr->caplen < 32) - return 0; - uhdr->status = SWAPLONG(uhdr->status); - if (hdr->caplen < 36) - return 0; - uhdr->urb_len = SWAPLONG(uhdr->urb_len); - if (hdr->caplen < 40) - return 0; - uhdr->data_len = SWAPLONG(uhdr->data_len); - } - return (0); -} - -/* - * Print out packets stored in the file initialized by sf_read_init(). + * Read packets from a capture file, and call the callback for each + * packet. * If cnt > 0, return after 'cnt' packets, otherwise continue until eof. */ int @@ -1571,6 +346,7 @@ pcap_offline_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) struct bpf_insn *fcode; int status = 0; int n = 0; + u_char *data; while (status == 0) { struct pcap_pkthdr h; @@ -1592,7 +368,7 @@ pcap_offline_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) return (n); } - status = sf_next_packet(p, &h, p->buffer, p->bufsize); + status = p->sf.next_packet_op(p, &h, &data); if (status) { if (status == 1) return (0); @@ -1601,7 +377,7 @@ pcap_offline_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) if ((fcode = p->fcode.bf_insns) == NULL || bpf_filter(fcode, p->buffer, h.len, h.caplen)) { - (*callback)(user, &h, p->buffer); + (*callback)(user, &h, data); if (++n >= cnt && cnt > 0) break; } @@ -1609,139 +385,3 @@ pcap_offline_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) /*XXX this breaks semantics tcpslice expects */ return (n); } - -/* - * Output a packet to the initialized dump file. - */ -void -pcap_dump(u_char *user, const struct pcap_pkthdr *h, const u_char *sp) -{ - register FILE *f; - struct pcap_sf_pkthdr sf_hdr; - - f = (FILE *)user; - sf_hdr.ts.tv_sec = h->ts.tv_sec; - sf_hdr.ts.tv_usec = h->ts.tv_usec; - sf_hdr.caplen = h->caplen; - sf_hdr.len = h->len; - /* XXX we should check the return status */ - (void)fwrite(&sf_hdr, sizeof(sf_hdr), 1, f); - (void)fwrite(sp, h->caplen, 1, f); -} - -static pcap_dumper_t * -pcap_setup_dump(pcap_t *p, int linktype, FILE *f, const char *fname) -{ - -#if defined(WIN32) || defined(MSDOS) - /* - * If we're writing to the standard output, put it in binary - * mode, as savefiles are binary files. - * - * Otherwise, we turn off buffering. - * XXX - why? And why not on the standard output? - */ - if (f == stdout) - SET_BINMODE(f); - else - setbuf(f, NULL); -#endif - if (sf_write_header(f, linktype, p->tzoff, p->snapshot) == -1) { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "Can't write to %s: %s", - fname, pcap_strerror(errno)); - if (f != stdout) - (void)fclose(f); - return (NULL); - } - return ((pcap_dumper_t *)f); -} - -/* - * Initialize so that sf_write() will output to the file named 'fname'. - */ -pcap_dumper_t * -pcap_dump_open(pcap_t *p, const char *fname) -{ - FILE *f; - int linktype; - - linktype = dlt_to_linktype(p->linktype); - if (linktype == -1) { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "%s: link-layer type %d isn't supported in savefiles", - fname, linktype); - return (NULL); - } - linktype |= p->linktype_ext; - - if (fname[0] == '-' && fname[1] == '\0') { - f = stdout; - fname = "standard output"; - } else { -#if !defined(WIN32) && !defined(MSDOS) - f = fopen(fname, "w"); -#else - f = fopen(fname, "wb"); -#endif - if (f == NULL) { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, "%s: %s", - fname, pcap_strerror(errno)); - return (NULL); - } - } - return (pcap_setup_dump(p, linktype, f, fname)); -} - -/* - * Initialize so that sf_write() will output to the given stream. - */ -pcap_dumper_t * -pcap_dump_fopen(pcap_t *p, FILE *f) -{ - int linktype; - - linktype = dlt_to_linktype(p->linktype); - if (linktype == -1) { - snprintf(p->errbuf, PCAP_ERRBUF_SIZE, - "stream: link-layer type %d isn't supported in savefiles", - linktype); - return (NULL); - } - linktype |= p->linktype_ext; - - return (pcap_setup_dump(p, linktype, f, "stream")); -} - -FILE * -pcap_dump_file(pcap_dumper_t *p) -{ - return ((FILE *)p); -} - -long -pcap_dump_ftell(pcap_dumper_t *p) -{ - return (ftell((FILE *)p)); -} - -int -pcap_dump_flush(pcap_dumper_t *p) -{ - - if (fflush((FILE *)p) == EOF) - return (-1); - else - return (0); -} - -void -pcap_dump_close(pcap_dumper_t *p) -{ - -#ifdef notyet - if (ferror((FILE *)p)) - return-an-error; - /* XXX should check return from fclose() too */ -#endif - (void)fclose((FILE *)p); -} |
