]> The Tcpdump Group git mirrors - tcpdump/blobdiff - tcpdump.c
Disentangle packet dissection functionally in tcpdump from the internal
[tcpdump] / tcpdump.c
index 8edb0367681d5c1a6ca5fd873bc1e7f1d012b93b..45db78d8d0807c70b02e5bfbfc95921dc099ef40 100644 (file)
--- a/tcpdump.c
+++ b/tcpdump.c
@@ -122,6 +122,8 @@ extern int SIZE_BUF;
 #include "gmt2local.h"
 #include "pcap-missing.h"
 
+#include "print.h"
+
 #ifndef PATH_MAX
 #define PATH_MAX 1024
 #endif
@@ -151,8 +153,6 @@ static int infoprint;
 
 char *program_name;
 
-int32_t thiszone;              /* seconds offset from gmt to local time */
-
 /* Forwards */
 static RETSIGTYPE cleanup(int);
 static RETSIGTYPE child_cleanup(int);
@@ -161,21 +161,9 @@ static void print_usage(void);
 static void show_dlts_and_exit(const char *device, pcap_t *pd) __attribute__((noreturn));
 
 static void print_packet(u_char *, const struct pcap_pkthdr *, const u_char *);
-static void ndo_default_print(netdissect_options *, const u_char *, u_int);
 static void dump_packet_and_trunc(u_char *, const struct pcap_pkthdr *, const u_char *);
 static void dump_packet(u_char *, const struct pcap_pkthdr *, const u_char *);
 static void droproot(const char *, const char *);
-static void ndo_error(netdissect_options *ndo, const char *fmt, ...)
-     __attribute__((noreturn))
-#ifdef __ATTRIBUTE___FORMAT_OK
-     __attribute__((format (printf, 2, 3)))
-#endif /* __ATTRIBUTE___FORMAT_OK */
-    ;
-static void ndo_warning(netdissect_options *ndo, const char *fmt, ...)
-#ifdef __ATTRIBUTE___FORMAT_OK
-     __attribute__((format (printf, 2, 3)))
-#endif /* __ATTRIBUTE___FORMAT_OK */
-    ;
 
 #ifdef SIGNAL_REQ_INFO
 RETSIGTYPE requestinfo(int);
@@ -192,192 +180,6 @@ RETSIGTYPE requestinfo(int);
 static void info(int);
 static u_int packets_captured;
 
-struct printer {
-       if_printer f;
-       int type;
-};
-
-
-static const struct printer printers[] = {
-       { ether_if_print,       DLT_EN10MB },
-#ifdef DLT_IPNET
-       { ipnet_if_print,       DLT_IPNET },
-#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_PPI
-       { ppi_if_print,         DLT_PPI },
-#endif
-#ifdef DLT_NETANALYZER
-       { netanalyzer_if_print, DLT_NETANALYZER },
-#endif
-#ifdef DLT_NETANALYZER_TRANSPARENT
-       { netanalyzer_transparent_if_print, DLT_NETANALYZER_TRANSPARENT },
-#endif
-#if defined(DLT_NFLOG) && defined(HAVE_PCAP_NFLOG_H)
-       { nflog_if_print,       DLT_NFLOG},
-#endif
-#ifdef DLT_CIP
-       { cip_if_print,         DLT_CIP },
-#endif
-#ifdef DLT_ATM_CLIP
-       { cip_if_print,         DLT_ATM_CLIP },
-#endif
-#ifdef DLT_IP_OVER_FC
-       { ipfc_if_print,        DLT_IP_OVER_FC },
-#endif
-       { null_if_print,        DLT_NULL },
-#ifdef DLT_LOOP
-       { null_if_print,        DLT_LOOP },
-#endif
-#ifdef DLT_APPLE_IP_OVER_IEEE1394
-       { ap1394_if_print,      DLT_APPLE_IP_OVER_IEEE1394 },
-#endif
-#if defined(DLT_BLUETOOTH_HCI_H4_WITH_PHDR) && defined(HAVE_PCAP_BLUETOOTH_H)
-       { bt_if_print,          DLT_BLUETOOTH_HCI_H4_WITH_PHDR},
-#endif
-#ifdef DLT_LANE8023
-       { lane_if_print,        DLT_LANE8023 },
-#endif
-       { arcnet_if_print,      DLT_ARCNET },
-#ifdef DLT_ARCNET_LINUX
-       { arcnet_linux_if_print, DLT_ARCNET_LINUX },
-#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 HAVE_PCAP_USB_H
-#ifdef DLT_USB_LINUX
-       { usb_linux_48_byte_print, DLT_USB_LINUX},
-#endif /* DLT_USB_LINUX */
-#ifdef DLT_USB_LINUX_MMAPPED
-       { usb_linux_64_byte_print, DLT_USB_LINUX_MMAPPED},
-#endif /* DLT_USB_LINUX_MMAPPED */
-#endif /* HAVE_PCAP_USB_H */
-#ifdef DLT_SYMANTEC_FIREWALL
-       { symantec_if_print,    DLT_SYMANTEC_FIREWALL },
-#endif
-#ifdef DLT_C_HDLC
-       { chdlc_if_print,       DLT_C_HDLC },
-#endif
-#ifdef DLT_HDLC
-       { chdlc_if_print,       DLT_HDLC },
-#endif
-#ifdef DLT_PPP_ETHER
-       { pppoe_if_print,       DLT_PPP_ETHER },
-#endif
-#if defined(DLT_PFLOG) && defined(HAVE_NET_PFVAR_H)
-       { pflog_if_print,       DLT_PFLOG },
-#endif
-       { token_if_print,       DLT_IEEE802 },
-       { fddi_if_print,        DLT_FDDI },
-#ifdef DLT_LINUX_SLL
-       { sll_if_print,         DLT_LINUX_SLL },
-#endif
-#ifdef DLT_FR
-       { fr_if_print,          DLT_FR },
-#endif
-#ifdef DLT_FRELAY
-       { fr_if_print,          DLT_FRELAY },
-#endif
-#ifdef DLT_MFR
-       { mfr_if_print,         DLT_MFR },
-#endif
-       { atm_if_print,         DLT_ATM_RFC1483 },
-#ifdef DLT_SUNATM
-       { sunatm_if_print,      DLT_SUNATM },
-#endif
-#ifdef DLT_ENC
-       { enc_if_print,         DLT_ENC },
-#endif
-       { sl_if_print,          DLT_SLIP },
-#ifdef DLT_SLIP_BSDOS
-       { sl_bsdos_if_print,    DLT_SLIP_BSDOS },
-#endif
-#ifdef DLT_LTALK
-       { ltalk_if_print,       DLT_LTALK },
-#endif
-#ifdef DLT_JUNIPER_ATM1
-       { juniper_atm1_print,   DLT_JUNIPER_ATM1 },
-#endif
-#ifdef DLT_JUNIPER_ATM2
-       { juniper_atm2_print,   DLT_JUNIPER_ATM2 },
-#endif
-#ifdef DLT_JUNIPER_MFR
-       { juniper_mfr_print,    DLT_JUNIPER_MFR },
-#endif
-#ifdef DLT_JUNIPER_MLFR
-       { juniper_mlfr_print,   DLT_JUNIPER_MLFR },
-#endif
-#ifdef DLT_JUNIPER_MLPPP
-       { juniper_mlppp_print,  DLT_JUNIPER_MLPPP },
-#endif
-#ifdef DLT_JUNIPER_PPPOE
-       { juniper_pppoe_print,  DLT_JUNIPER_PPPOE },
-#endif
-#ifdef DLT_JUNIPER_PPPOE_ATM
-       { juniper_pppoe_atm_print, DLT_JUNIPER_PPPOE_ATM },
-#endif
-#ifdef DLT_JUNIPER_GGSN
-       { juniper_ggsn_print,   DLT_JUNIPER_GGSN },
-#endif
-#ifdef DLT_JUNIPER_ES
-       { juniper_es_print,     DLT_JUNIPER_ES },
-#endif
-#ifdef DLT_JUNIPER_MONITOR
-       { juniper_monitor_print, DLT_JUNIPER_MONITOR },
-#endif
-#ifdef DLT_JUNIPER_SERVICES
-       { juniper_services_print, DLT_JUNIPER_SERVICES },
-#endif
-#ifdef DLT_JUNIPER_ETHER
-       { juniper_ether_print,  DLT_JUNIPER_ETHER },
-#endif
-#ifdef DLT_JUNIPER_PPP
-       { juniper_ppp_print,    DLT_JUNIPER_PPP },
-#endif
-#ifdef DLT_JUNIPER_FRELAY
-       { juniper_frelay_print, DLT_JUNIPER_FRELAY },
-#endif
-#ifdef DLT_JUNIPER_CHDLC
-       { juniper_chdlc_print,  DLT_JUNIPER_CHDLC },
-#endif
-#ifdef DLT_PKTAP
-       { pktap_if_print,       DLT_PKTAP },
-#endif
-#ifdef DLT_IEEE802_11_RADIO
-       { ieee802_11_radio_if_print,    DLT_IEEE802_11_RADIO },
-#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_PRISM_HEADER
-       { prism_if_print,       DLT_PRISM_HEADER },
-#endif
-       { ppp_if_print,         DLT_PPP },
-#ifdef DLT_PPP_WITHDIRECTION
-       { ppp_if_print,         DLT_PPP_WITHDIRECTION },
-#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
-       { NULL,                 0 },
-};
-
 static const struct tok status_flags[] = {
 #ifdef PCAP_IF_UP
        { PCAP_IF_UP,       "Up"       },
@@ -389,43 +191,6 @@ static const struct tok status_flags[] = {
        { 0, NULL }
 };
 
-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 */
-}
-
 static pcap_t *pd;
 
 static int supports_monitor_mode;
@@ -434,11 +199,6 @@ extern int optind;
 extern int opterr;
 extern char *optarg;
 
-struct print_info {
-        netdissect_options *ndo;
-        if_printer printer;
-};
-
 struct dump_info {
        char    *WFileName;
        char    *CurrentFileName;
@@ -521,7 +281,7 @@ show_dlts_and_exit(const char *device, pcap_t *pd)
                        /*
                         * OK, does tcpdump handle that type?
                         */
-                       if (lookup_printer(dlts[i]) == NULL)
+                       if (!has_printer(dlts[i]))
                                (void) fprintf(stderr, " (printing not supported)");
                        fprintf(stderr, "\n");
                } else {
@@ -815,38 +575,6 @@ MakeFilename(char *buffer, char *orig_name, int cnt, int max_chars)
         free(filename);
 }
 
-static int tcpdump_printf(netdissect_options *ndo _U_,
-                         const char *fmt, ...)
-{
-
-  va_list args;
-  int ret;
-
-  va_start(args, fmt);
-  ret=vfprintf(stdout, fmt, args);
-  va_end(args);
-
-  return ret;
-}
-
-static struct print_info
-get_print_info(int type)
-{
-       struct print_info printinfo;
-
-       printinfo.ndo = gndo;
-       printinfo.printer = lookup_printer(type);
-       if (printinfo.printer == NULL) {
-               gndo->ndo_dltname = pcap_datalink_val_to_name(type);
-               if (gndo->ndo_dltname != NULL)
-                       error("packet printing is not supported for link type %s: use -w",
-                             gndo->ndo_dltname);
-               else
-                       error("packet printing is not supported for link type %d: use -w", type);
-       }
-       return (printinfo);
-}
-
 static char *
 get_next_file(FILE *VFile, char *ptr)
 {
@@ -967,6 +695,7 @@ main(int argc, char **argv)
 {
        register int cnt, op, i;
        bpf_u_int32 localnet =0 , netmask = 0;
+       int timezone_offset = 0;
        register char *cp, *infile, *cmdbuf, *device, *RFileName, *VFileName, *WFileName;
        pcap_handler callback;
        int type;
@@ -1005,10 +734,7 @@ main(int argc, char **argv)
         gndo->ndo_Oflag=1;
        gndo->ndo_Rflag=1;
        gndo->ndo_dlt=-1;
-       gndo->ndo_default_print=ndo_default_print;
-       gndo->ndo_printf=tcpdump_printf;
-       gndo->ndo_error=ndo_error;
-       gndo->ndo_warning=ndo_warning;
+       ndo_set_function_pointers(gndo);
        gndo->ndo_snaplen = DEFAULT_SNAPLEN;
        gndo->ndo_immediate = 0;
 
@@ -1439,7 +1165,7 @@ main(int argc, char **argv)
 
        case 0: /* Default */
        case 4: /* Default + Date*/
-               thiszone = gmt2local(0);
+               timezone_offset = gmt2local(0);
                break;
 
        case 1: /* No time stamp */
@@ -1750,8 +1476,7 @@ main(int argc, char **argv)
                free(cmdbuf);
                exit(0);
        }
-       init_addrtoname(gndo, localnet, netmask);
-        init_checksum();
+       init_print(localnet, netmask, timezone_offset);
 
 #ifndef WIN32
        (void)setsignal(SIGPIPE, cleanup);
@@ -2407,94 +2132,14 @@ print_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *sp)
 {
        struct print_info *print_info;
        u_int hdrlen;
-        netdissect_options *ndo;
 
        ++packets_captured;
 
        ++infodelay;
 
        print_info = (struct print_info *)user;
-        ndo = print_info->ndo;
-
-       if(ndo->ndo_packet_number)
-               ND_PRINT((ndo, "%5u  ", packets_captured));
-
-       ts_print(ndo, &h->ts);
-
-       /*
-        * Some printers want to 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;
-
-        hdrlen = (*print_info->printer)(print_info->ndo, h, sp);
-
-       /*
-        * Restore the original snapend, as a printer might have
-        * changed it.
-        */
-       ndo->ndo_snapend = sp + h->caplen;
-       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);
-               }
-       }
 
-       putchar('\n');
+       pretty_print_packet(print_info, h, sp, packets_captured);
 
        --infodelay;
        if (infoprint)
@@ -2528,15 +2173,6 @@ print_packet(u_char *user, const struct pcap_pkthdr *h, const u_char *sp)
        char Wpcap_version[]="3.1";
 #endif
 
-/*
- * 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 */
-}
-
 #ifdef SIGNAL_REQ_INFO
 RETSIGTYPE requestinfo(int signo _U_)
 {
@@ -2640,44 +2276,6 @@ print_usage(void)
        (void)fprintf(stderr,
 "\t\t[ -Z user ] [ expression ]\n");
 }
-
-
-
-/* VARARGS */
-static void
-ndo_error(netdissect_options *ndo _U_, const char *fmt, ...)
-{
-       va_list ap;
-
-       (void)fprintf(stderr, "%s: ", 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);
-       }
-       exit(1);
-       /* NOTREACHED */
-}
-
-/* VARARGS */
-static void
-ndo_warning(netdissect_options *ndo _U_, const char *fmt, ...)
-{
-       va_list ap;
-
-       (void)fprintf(stderr, "%s: WARNING: ", 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);
-       }
-}
 /*
  * Local Variables:
  * c-style: whitesmith