/* * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 2000 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of * the University nor the names of its contributors may be used to endorse * or promote products derived from this software without specific prior * written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * Support for splitting captures into multiple files with a maximum * file size: * * Copyright (c) 2001 * Seth Webster */ #include #include #include #include #include "netdissect-stdinc.h" #include "netdissect.h" #include "addrtoname.h" #include "print.h" #include "netdissect-alloc.h" #include "pcap-missing.h" struct printer { if_printer f; int type; }; static const struct printer printers[] = { #ifdef DLT_APPLE_IP_OVER_IEEE1394 { ap1394_if_print, DLT_APPLE_IP_OVER_IEEE1394 }, #endif { arcnet_if_print, DLT_ARCNET }, #ifdef DLT_ARCNET_LINUX { arcnet_linux_if_print, DLT_ARCNET_LINUX }, #endif { atm_if_print, DLT_ATM_RFC1483 }, #ifdef DLT_DSA_TAG_BRCM { brcm_tag_if_print, DLT_DSA_TAG_BRCM }, #endif #ifdef DLT_DSA_TAG_BRCM_PREPEND { brcm_tag_prepend_if_print, DLT_DSA_TAG_BRCM_PREPEND }, #endif #ifdef DLT_BLUETOOTH_HCI_H4_WITH_PHDR { bt_if_print, DLT_BLUETOOTH_HCI_H4_WITH_PHDR}, #endif #ifdef DLT_C_HDLC { chdlc_if_print, DLT_C_HDLC }, #endif #ifdef DLT_HDLC { chdlc_if_print, DLT_HDLC }, #endif #ifdef DLT_ATM_CLIP { cip_if_print, DLT_ATM_CLIP }, #endif #ifdef DLT_CIP { cip_if_print, DLT_CIP }, #endif #ifdef DLT_DSA_TAG_DSA { dsa_if_print, DLT_DSA_TAG_DSA }, #endif #ifdef DLT_DSA_TAG_EDSA { edsa_if_print, DLT_DSA_TAG_EDSA }, #endif #ifdef DLT_ENC { enc_if_print, DLT_ENC }, #endif { ether_if_print, DLT_EN10MB }, { fddi_if_print, DLT_FDDI }, #ifdef DLT_FR { fr_if_print, DLT_FR }, #endif #ifdef DLT_FRELAY { fr_if_print, DLT_FRELAY }, #endif #ifdef DLT_IEEE802_11 { ieee802_11_if_print, DLT_IEEE802_11}, #endif #ifdef DLT_IEEE802_11_RADIO_AVS { ieee802_11_radio_avs_if_print, DLT_IEEE802_11_RADIO_AVS }, #endif #ifdef DLT_IEEE802_11_RADIO { ieee802_11_radio_if_print, DLT_IEEE802_11_RADIO }, #endif #ifdef DLT_IEEE802_15_4 { ieee802_15_4_if_print, DLT_IEEE802_15_4 }, #endif #ifdef DLT_IEEE802_15_4_NOFCS { ieee802_15_4_if_print, DLT_IEEE802_15_4_NOFCS }, #endif #ifdef DLT_IEEE802_15_4_TAP { ieee802_15_4_tap_if_print, DLT_IEEE802_15_4_TAP }, #endif #ifdef DLT_IP_OVER_FC { ipfc_if_print, DLT_IP_OVER_FC }, #endif #ifdef DLT_IPNET { ipnet_if_print, DLT_IPNET }, #endif #ifdef DLT_IPOIB { ipoib_if_print, DLT_IPOIB }, #endif #ifdef DLT_JUNIPER_ATM1 { juniper_atm1_if_print, DLT_JUNIPER_ATM1 }, #endif #ifdef DLT_JUNIPER_ATM2 { juniper_atm2_if_print, DLT_JUNIPER_ATM2 }, #endif #ifdef DLT_JUNIPER_CHDLC { juniper_chdlc_if_print, DLT_JUNIPER_CHDLC }, #endif #ifdef DLT_JUNIPER_ES { juniper_es_if_print, DLT_JUNIPER_ES }, #endif #ifdef DLT_JUNIPER_ETHER { juniper_ether_if_print, DLT_JUNIPER_ETHER }, #endif #ifdef DLT_JUNIPER_FRELAY { juniper_frelay_if_print, DLT_JUNIPER_FRELAY }, #endif #ifdef DLT_JUNIPER_GGSN { juniper_ggsn_if_print, DLT_JUNIPER_GGSN }, #endif #ifdef DLT_JUNIPER_MFR { juniper_mfr_if_print, DLT_JUNIPER_MFR }, #endif #ifdef DLT_JUNIPER_MLFR { juniper_mlfr_if_print, DLT_JUNIPER_MLFR }, #endif #ifdef DLT_JUNIPER_MLPPP { juniper_mlppp_if_print, DLT_JUNIPER_MLPPP }, #endif #ifdef DLT_JUNIPER_MONITOR { juniper_monitor_if_print, DLT_JUNIPER_MONITOR }, #endif #ifdef DLT_JUNIPER_PPP { juniper_ppp_if_print, DLT_JUNIPER_PPP }, #endif #ifdef DLT_JUNIPER_PPPOE_ATM { juniper_pppoe_atm_if_print, DLT_JUNIPER_PPPOE_ATM }, #endif #ifdef DLT_JUNIPER_PPPOE { juniper_pppoe_if_print, DLT_JUNIPER_PPPOE }, #endif #ifdef DLT_JUNIPER_SERVICES { juniper_services_if_print, DLT_JUNIPER_SERVICES }, #endif #ifdef DLT_LTALK { ltalk_if_print, DLT_LTALK }, #endif #ifdef DLT_MFR { mfr_if_print, DLT_MFR }, #endif #ifdef DLT_NETANALYZER { netanalyzer_if_print, DLT_NETANALYZER }, #endif #ifdef DLT_NETANALYZER_TRANSPARENT { netanalyzer_transparent_if_print, DLT_NETANALYZER_TRANSPARENT }, #endif #ifdef DLT_NFLOG { nflog_if_print, DLT_NFLOG}, #endif { null_if_print, DLT_NULL }, #ifdef DLT_LOOP { null_if_print, DLT_LOOP }, #endif #ifdef DLT_PFLOG { pflog_if_print, DLT_PFLOG }, #endif #ifdef DLT_PKTAP { pktap_if_print, DLT_PKTAP }, #endif #ifdef DLT_PPI { ppi_if_print, DLT_PPI }, #endif #ifdef DLT_PPP_BSDOS { ppp_bsdos_if_print, DLT_PPP_BSDOS }, #endif #ifdef DLT_PPP_SERIAL { ppp_hdlc_if_print, DLT_PPP_SERIAL }, #endif { ppp_if_print, DLT_PPP }, #ifdef DLT_PPP_PPPD { ppp_if_print, DLT_PPP_PPPD }, #endif #ifdef DLT_PPP_ETHER { pppoe_if_print, DLT_PPP_ETHER }, #endif #ifdef DLT_PRISM_HEADER { prism_if_print, DLT_PRISM_HEADER }, #endif { raw_if_print, DLT_RAW }, #ifdef DLT_IPV4 { raw_if_print, DLT_IPV4 }, #endif #ifdef DLT_IPV6 { raw_if_print, DLT_IPV6 }, #endif #ifdef DLT_SLIP_BSDOS { sl_bsdos_if_print, DLT_SLIP_BSDOS }, #endif { sl_if_print, DLT_SLIP }, #ifdef DLT_LINUX_SLL { sll_if_print, DLT_LINUX_SLL }, #endif #ifdef DLT_LINUX_SLL2 { sll2_if_print, DLT_LINUX_SLL2 }, #endif #ifdef DLT_SUNATM { sunatm_if_print, DLT_SUNATM }, #endif #ifdef DLT_SYMANTEC_FIREWALL { symantec_if_print, DLT_SYMANTEC_FIREWALL }, #endif { token_if_print, DLT_IEEE802 }, #ifdef DLT_USB_LINUX { usb_linux_48_byte_if_print, DLT_USB_LINUX}, #endif /* DLT_USB_LINUX */ #ifdef DLT_USB_LINUX_MMAPPED { usb_linux_64_byte_if_print, DLT_USB_LINUX_MMAPPED}, #endif /* DLT_USB_LINUX_MMAPPED */ #ifdef DLT_VSOCK { vsock_if_print, DLT_VSOCK }, #endif { NULL, 0 }, }; static void ndo_default_print(netdissect_options *ndo, const u_char *bp, u_int length); static void NORETURN ndo_error(netdissect_options *ndo, status_exit_codes_t status, FORMAT_STRING(const char *fmt), ...) PRINTFLIKE(3, 4); static void ndo_warning(netdissect_options *ndo, FORMAT_STRING(const char *fmt), ...) PRINTFLIKE(2, 3); static int ndo_printf(netdissect_options *ndo, FORMAT_STRING(const char *fmt), ...) PRINTFLIKE(2, 3); void init_print(netdissect_options *ndo, uint32_t localnet, uint32_t mask) { init_addrtoname(ndo, localnet, mask); } if_printer lookup_printer(int type) { const struct printer *p; for (p = printers; p->f; ++p) if (type == p->type) return p->f; #if defined(DLT_USER2) && defined(DLT_PKTAP) /* * Apple incorrectly chose to use DLT_USER2 for their PKTAP * header. * * We map DLT_PKTAP, whether it's DLT_USER2 as it is on Darwin- * based OSes or the same value as LINKTYPE_PKTAP as it is on * other OSes, to LINKTYPE_PKTAP, so files written with * this version of libpcap for a DLT_PKTAP capture have a link- * layer header type of LINKTYPE_PKTAP. * * However, files written on OS X Mavericks for a DLT_PKTAP * capture have a link-layer header type of LINKTYPE_USER2. * If we don't have a printer for DLT_USER2, and type is * DLT_USER2, we look up the printer for DLT_PKTAP and use * that. */ if (type == DLT_USER2) { for (p = printers; p->f; ++p) if (DLT_PKTAP == p->type) return p->f; } #endif return NULL; /* NOTREACHED */ } int has_printer(int type) { return (lookup_printer(type) != NULL); } if_printer get_if_printer(int type) { if_printer printer; printer = lookup_printer(type); if (printer == NULL) printer = unsupported_if_print; return printer; } #ifdef ENABLE_INSTRUMENT_FUNCTIONS extern int profile_func_level; static int pretty_print_packet_level = -1; #endif void pretty_print_packet(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *sp, u_int packets_captured) { u_int hdrlen = 0; int invalid_header = 0; #ifdef ENABLE_INSTRUMENT_FUNCTIONS if (pretty_print_packet_level == -1) pretty_print_packet_level = profile_func_level; #endif if (ndo->ndo_packet_number) ND_PRINT("%5u ", packets_captured); /* Sanity checks on packet length / capture length */ if (h->caplen == 0) { invalid_header = 1; ND_PRINT("[Invalid header: caplen==0"); } if (h->len == 0) { if (!invalid_header) { invalid_header = 1; ND_PRINT("[Invalid header:"); } else ND_PRINT(","); ND_PRINT(" len==0"); } else if (h->len < h->caplen) { if (!invalid_header) { invalid_header = 1; ND_PRINT("[Invalid header:"); } else ND_PRINT(","); ND_PRINT(" len(%u) < caplen(%u)", h->len, h->caplen); } if (h->caplen > MAXIMUM_SNAPLEN) { if (!invalid_header) { invalid_header = 1; ND_PRINT("[Invalid header:"); } else ND_PRINT(","); ND_PRINT(" caplen(%u) > %u", h->caplen, MAXIMUM_SNAPLEN); } if (h->len > MAXIMUM_SNAPLEN) { if (!invalid_header) { invalid_header = 1; ND_PRINT("[Invalid header:"); } else ND_PRINT(","); ND_PRINT(" len(%u) > %u", h->len, MAXIMUM_SNAPLEN); } if (invalid_header) { ND_PRINT("]\n"); return; } /* * At this point: * capture length != 0, * packet length != 0, * capture length <= MAXIMUM_SNAPLEN, * packet length <= MAXIMUM_SNAPLEN, * packet length >= capture length. * * Currently, there is no D-Bus printer, thus no need for * bigger lengths. */ /* * The header /usr/include/pcap/pcap.h in OpenBSD declares h->ts as * struct bpf_timeval, not struct timeval. The former comes from * /usr/include/net/bpf.h and uses 32-bit unsigned types instead of * the types used in struct timeval. */ struct timeval tvbuf; tvbuf.tv_sec = h->ts.tv_sec; tvbuf.tv_usec = h->ts.tv_usec; ts_print(ndo, &tvbuf); /* * Printers must check that they're not walking off the end of * the packet. * Rather than pass it all the way down, we set this member * of the netdissect_options structure. */ ndo->ndo_snapend = sp + h->caplen; ndo->ndo_packetp = sp; ndo->ndo_protocol = ""; ndo->ndo_ll_hdr_len = 0; switch (setjmp(ndo->ndo_early_end)) { case 0: /* Print the packet. */ (ndo->ndo_if_printer)(ndo, h, sp); break; case ND_TRUNCATED: /* A printer quit because the packet was truncated; report it */ nd_print_trunc(ndo); /* Print the full packet */ ndo->ndo_ll_hdr_len = 0; #ifdef ENABLE_INSTRUMENT_FUNCTIONS /* truncation => reassignment */ profile_func_level = pretty_print_packet_level; #endif break; } hdrlen = ndo->ndo_ll_hdr_len; /* * Empty the stack of packet information, freeing all pushed buffers; * if we got here by a printer quitting, we need to release anything * that didn't get released because we longjmped out of the code * before it popped the packet information. */ nd_pop_all_packet_info(ndo); /* * Restore the originals snapend and packetp, as a printer * might have changed them. * * XXX - nd_pop_all_packet_info() should have restored the * original values, but, just in case.... */ ndo->ndo_snapend = sp + h->caplen; ndo->ndo_packetp = sp; if (ndo->ndo_Xflag) { /* * Print the raw packet data in hex and ASCII. */ if (ndo->ndo_Xflag > 1) { /* * Include the link-layer header. */ hex_and_ascii_print(ndo, "\n\t", sp, h->caplen); } else { /* * Don't include the link-layer header - and if * we have nothing past the link-layer header, * print nothing. */ if (h->caplen > hdrlen) hex_and_ascii_print(ndo, "\n\t", sp + hdrlen, h->caplen - hdrlen); } } else if (ndo->ndo_xflag) { /* * Print the raw packet data in hex. */ if (ndo->ndo_xflag > 1) { /* * Include the link-layer header. */ hex_print(ndo, "\n\t", sp, h->caplen); } else { /* * Don't include the link-layer header - and if * we have nothing past the link-layer header, * print nothing. */ if (h->caplen > hdrlen) hex_print(ndo, "\n\t", sp + hdrlen, h->caplen - hdrlen); } } else if (ndo->ndo_Aflag) { /* * Print the raw packet data in ASCII. */ if (ndo->ndo_Aflag > 1) { /* * Include the link-layer header. */ ascii_print(ndo, sp, h->caplen); } else { /* * Don't include the link-layer header - and if * we have nothing past the link-layer header, * print nothing. */ if (h->caplen > hdrlen) ascii_print(ndo, sp + hdrlen, h->caplen - hdrlen); } } ND_PRINT("\n"); nd_free_all(ndo); } /* * By default, print the specified data out in hex and ASCII. */ static void ndo_default_print(netdissect_options *ndo, const u_char *bp, u_int length) { hex_and_ascii_print(ndo, "\n\t", bp, length); /* pass on lf and indentation string */ } /* VARARGS */ static void ndo_error(netdissect_options *ndo, status_exit_codes_t status, const char *fmt, ...) { va_list ap; if (ndo->program_name) (void)fprintf(stderr, "%s: ", ndo->program_name); va_start(ap, fmt); (void)vfprintf(stderr, fmt, ap); va_end(ap); if (*fmt) { fmt += strlen(fmt); if (fmt[-1] != '\n') (void)fputc('\n', stderr); } nd_cleanup(); exit(status); /* NOTREACHED */ } /* VARARGS */ static void ndo_warning(netdissect_options *ndo, const char *fmt, ...) { va_list ap; if (ndo->program_name) (void)fprintf(stderr, "%s: ", ndo->program_name); (void)fprintf(stderr, "WARNING: "); va_start(ap, fmt); (void)vfprintf(stderr, fmt, ap); va_end(ap); if (*fmt) { fmt += strlen(fmt); if (fmt[-1] != '\n') (void)fputc('\n', stderr); } } static int ndo_printf(netdissect_options *ndo, const char *fmt, ...) { va_list args; int ret; va_start(args, fmt); ret = vfprintf(stdout, fmt, args); va_end(args); if (ret < 0) ndo_error(ndo, S_ERR_ND_WRITE_FILE, "Unable to write output: %s", pcap_strerror(errno)); return (ret); } void ndo_set_function_pointers(netdissect_options *ndo) { ndo->ndo_default_print=ndo_default_print; ndo->ndo_printf=ndo_printf; ndo->ndo_error=ndo_error; ndo->ndo_warning=ndo_warning; }