Import tcpdump 3.8.3, from http://www.tcpdump.org/releases/tcpdump-3.8.3.tar.gz

1 files changed, 382 insertions, 0 deletions

diff --git a/contrib/tcpdump/print-ldp.c b/contrib/tcpdump/print-ldp.c
new file mode 100644
index 000000000000..1162ac39afd0
--- /dev/null
+++ b/contrib/tcpdump/print-ldp.c
@@ -0,0 +1,382 @@
+/*
+ * 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, and (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.
+ * 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.
+ *
+ * Original code by Hannes Gredler (hannes@juniper.net)
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-ldp.c,v 1.4.2.2 2003/11/16 08:51:31 guy Exp $";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "interface.h"
+#include "extract.h"
+#include "addrtoname.h"
+
+/*
+ * ldp common header
+ *
+ *  0                   1                   2                   3
+ *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |  Version                      |         PDU Length            |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                         LDP Identifier                        |
+ * +                               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ */
+
+struct ldp_common_header {
+    u_int8_t version[2];
+    u_int8_t pdu_length[2];
+    u_int8_t lsr_id[4];
+    u_int8_t label_space[2];
+};
+
+#define LDP_VERSION 1
+
+/*
+ * ldp message header
+ *
+ *  0                   1                   2                   3
+ *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |U|   Message Type              |      Message Length           |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                     Message ID                                |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                                                               |
+ * +                                                               +
+ * |                     Mandatory Parameters                      |
+ * +                                                               +
+ * |                                                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                                                               |
+ * +                                                               +
+ * |                     Optional Parameters                       |
+ * +                                                               +
+ * |                                                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+struct ldp_msg_header {
+    u_int8_t type[2];
+    u_int8_t length[2];
+    u_int8_t id[4];
+};
+
+#define	LDP_MASK_MSG_TYPE(x)  ((x)&0x7fff) 
+#define	LDP_MASK_U_BIT(x)     ((x)&0x8000) 
+
+#define	LDP_MSG_NOTIF                0x0001
+#define	LDP_MSG_HELLO                0x0100
+#define	LDP_MSG_INIT                 0x0200
+#define	LDP_MSG_KEEPALIVE            0x0201
+#define	LDP_MSG_ADDRESS              0x0300
+#define	LDP_MSG_ADDRESS_WITHDRAW     0x0301
+#define	LDP_MSG_LABEL_MAPPING        0x0400
+#define	LDP_MSG_LABEL_REQUEST        0x0401
+#define	LDP_MSG_LABEL_WITHDRAW       0x0402
+#define	LDP_MSG_LABEL_RELEASE        0x0403
+#define	LDP_MSG_LABEL_ABORT_REQUEST  0x0404
+
+#define	LDP_VENDOR_PRIVATE_MIN       0x3e00
+#define	LDP_VENDOR_PRIVATE_MAX       0x3eff
+#define	LDP_EXPERIMENTAL_MIN         0x3f00
+#define	LDP_EXPERIMENTAL_MAX         0x3fff
+
+static const struct tok ldp_msg_values[] = {
+    { LDP_MSG_NOTIF,	             "Notification" },
+    { LDP_MSG_HELLO,	             "Hello" },
+    { LDP_MSG_INIT,	             "Initialization" },
+    { LDP_MSG_KEEPALIVE,             "Keepalive" },
+    { LDP_MSG_ADDRESS,	             "Address" },
+    { LDP_MSG_ADDRESS_WITHDRAW,	     "Address Widthdraw" },
+    { LDP_MSG_LABEL_MAPPING,	     "Label Mapping" },
+    { LDP_MSG_LABEL_REQUEST,	     "Label Request" },
+    { LDP_MSG_LABEL_WITHDRAW,	     "Label Withdraw" },
+    { LDP_MSG_LABEL_RELEASE,	     "Label Release" },
+    { LDP_MSG_LABEL_ABORT_REQUEST,   "Label Abort Request" },
+    { 0, NULL}
+};
+
+#define	LDP_MASK_TLV_TYPE(x)  ((x)&0x3fff) 
+#define	LDP_MASK_F_BIT(x) ((x)&0x4000) 
+
+#define	LDP_TLV_FEC                  0x0100
+#define	LDP_TLV_ADDRESS_LIST         0x0101
+#define	LDP_TLV_HOP_COUNT            0x0103
+#define	LDP_TLV_PATH_VECTOR          0x0104
+#define	LDP_TLV_GENERIC_LABEL        0x0200
+#define	LDP_TLV_ATM_LABEL            0x0201
+#define	LDP_TLV_FR_LABEL             0x0202
+#define	LDP_TLV_STATUS               0x0300
+#define	LDP_TLV_EXTD_STATUS          0x0301
+#define	LDP_TLV_RETURNED_PDU         0x0302
+#define	LDP_TLV_RETURNED_MSG         0x0303
+#define	LDP_TLV_COMMON_HELLO         0x0400
+#define	LDP_TLV_IPV4_TRANSPORT_ADDR  0x0401
+#define	LDP_TLV_CONFIG_SEQ_NUMBER    0x0402
+#define	LDP_TLV_IPV6_TRANSPORT_ADDR  0x0403
+#define	LDP_TLV_COMMON_SESSION       0x0500
+#define	LDP_TLV_ATM_SESSION_PARM     0x0501
+#define	LDP_TLV_FR_SESSION_PARM      0x0502
+#define	LDP_TLV_LABEL_REQUEST_MSG_ID 0x0600
+
+static const struct tok ldp_tlv_values[] = {
+    { LDP_TLV_FEC,	             "FEC" },
+    { LDP_TLV_ADDRESS_LIST,          "Address List" },
+    { LDP_TLV_HOP_COUNT,             "Hop Count" },
+    { LDP_TLV_PATH_VECTOR,           "Path Vector" },
+    { LDP_TLV_GENERIC_LABEL,         "Generic Label" },
+    { LDP_TLV_ATM_LABEL,             "ATM Label" },
+    { LDP_TLV_FR_LABEL,              "Frame-Relay Label" },
+    { LDP_TLV_STATUS,                "Status" },
+    { LDP_TLV_EXTD_STATUS,           "Extended Status" },
+    { LDP_TLV_RETURNED_PDU,          "Returned PDU" },
+    { LDP_TLV_RETURNED_MSG,          "Returned Message" },
+    { LDP_TLV_COMMON_HELLO,          "Common Hello Parameters" },
+    { LDP_TLV_IPV4_TRANSPORT_ADDR,   "IPv4 Transport Address" },
+    { LDP_TLV_CONFIG_SEQ_NUMBER,     "Configuration Sequence Number" },
+    { LDP_TLV_IPV6_TRANSPORT_ADDR,   "IPv6 Transport Address" },
+    { LDP_TLV_COMMON_SESSION,        "Common Session Parameters" },
+    { LDP_TLV_ATM_SESSION_PARM,      "ATM Session Parameters" },
+    { LDP_TLV_FR_SESSION_PARM,       "Frame-Relay Session Parameters" },
+    { LDP_TLV_LABEL_REQUEST_MSG_ID,  "Label Request Message ID" },
+    { 0, NULL}
+};
+
+#define FALSE 0
+#define TRUE  1
+
+int ldp_tlv_print(register const u_char *);
+   
+/* 
+ * ldp tlv header
+ *
+ *  0                   1                   2                   3
+ *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |U|F|        Type               |            Length             |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                                                               |
+ * |                             Value                             |
+ * ~                                                               ~
+ * |                                                               |
+ * |                               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+int
+ldp_tlv_print(register const u_char *tptr) {
+
+    struct ldp_tlv_header {
+        u_int8_t type[2];
+        u_int8_t length[2];
+    };
+
+    const struct ldp_tlv_header *ldp_tlv_header;
+    u_short tlv_type,tlv_len,tlv_tlen;
+
+    ldp_tlv_header = (const struct ldp_tlv_header *)tptr;    
+    tlv_len=EXTRACT_16BITS(ldp_tlv_header->length);
+    tlv_tlen=tlv_len;
+    tlv_type=LDP_MASK_TLV_TYPE(EXTRACT_16BITS(ldp_tlv_header->type));
+
+    /* FIXME vendor private / experimental check */
+    printf("\n\t    %s TLV (0x%04x), length: %u, Flags: [%s and %s forward if unknown]",
+           tok2str(ldp_tlv_values,
+                   "Unknown",
+                   tlv_type),
+           tlv_type,
+           tlv_len,
+           LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "continue processing" : "ignore",
+           LDP_MASK_F_BIT(EXTRACT_16BITS(&ldp_tlv_header->type)) ? "do" : "don't");
+
+    tptr+=sizeof(struct ldp_tlv_header);
+
+    switch(tlv_type) {
+
+    case LDP_TLV_COMMON_HELLO:
+        printf("\n\t      Hold Time: %us, Flags: [%s Hello%s]",
+               EXTRACT_16BITS(tptr),
+               (EXTRACT_16BITS(tptr+2)&0x8000) ? "Targeted" : "Link",
+               (EXTRACT_16BITS(tptr+2)&0x4000) ? ", Request for targeted Hellos" : "");
+        break;
+
+    case LDP_TLV_IPV4_TRANSPORT_ADDR:
+        printf("\n\t      IPv4 Transport Address: %s", ipaddr_string(tptr));
+        break;
+#ifdef INET6
+    case LDP_TLV_IPV6_TRANSPORT_ADDR:
+        printf("\n\t      IPv6 Transport Address: %s", ip6addr_string(tptr));
+        break;
+#endif
+    case LDP_TLV_CONFIG_SEQ_NUMBER:
+        printf("\n\t      Sequence Number: %u", EXTRACT_32BITS(tptr));
+        break;
+
+    /*
+     *  FIXME those are the defined TLVs that lack a decoder
+     *  you are welcome to contribute code ;-)
+     */
+
+    case LDP_TLV_FEC:
+    case LDP_TLV_ADDRESS_LIST:
+    case LDP_TLV_HOP_COUNT:
+    case LDP_TLV_PATH_VECTOR:
+    case LDP_TLV_GENERIC_LABEL:
+    case LDP_TLV_ATM_LABEL:
+    case LDP_TLV_FR_LABEL:
+    case LDP_TLV_STATUS:
+    case LDP_TLV_EXTD_STATUS:
+    case LDP_TLV_RETURNED_PDU:
+    case LDP_TLV_RETURNED_MSG:
+    case LDP_TLV_COMMON_SESSION:
+    case LDP_TLV_ATM_SESSION_PARM:
+    case LDP_TLV_FR_SESSION_PARM:
+    case LDP_TLV_LABEL_REQUEST_MSG_ID:
+
+    default:
+        if (vflag <= 1)
+            print_unknown_data(tptr,"\n\t      ",tlv_tlen);
+        break;
+    }
+    return(tlv_len+4); /* Type & Length fields not included */
+}
+
+void
+ldp_print(register const u_char *pptr, register u_int len) {
+
+    const struct ldp_common_header *ldp_com_header;
+    const struct ldp_msg_header *ldp_msg_header;
+    const u_char *tptr,*msg_tptr;
+    u_short tlen;
+    u_short msg_len,msg_type,msg_tlen;
+    int hexdump,processed;
+
+    tptr=pptr;
+    ldp_com_header = (const struct ldp_common_header *)pptr;
+    TCHECK(*ldp_com_header);
+
+    /*
+     * Sanity checking of the header.
+     */
+    if (EXTRACT_16BITS(&ldp_com_header->version) != LDP_VERSION) {
+	printf("LDP version %u packet not supported",
+               EXTRACT_16BITS(&ldp_com_header->version));
+	return;
+    }
+
+    /* print the LSR-ID, label-space & length */
+    printf("%sLDP, Label-Space-ID: %s:%u, length: %u",
+           (vflag < 1) ? "" : "\n\t",
+           ipaddr_string(&ldp_com_header->lsr_id),
+           EXTRACT_16BITS(&ldp_com_header->label_space),
+           len);
+
+    /* bail out if non-verbose */ 
+    if (vflag < 1)
+        return;
+
+    /* ok they seem to want to know everything - lets fully decode it */
+    tlen=EXTRACT_16BITS(ldp_com_header->pdu_length);
+
+    tptr+=sizeof(const struct ldp_common_header);
+    tlen-=sizeof(const struct ldp_common_header);
+
+    while(tlen>0) {
+        /* did we capture enough for fully decoding the msg header ? */
+        if (!TTEST2(*tptr, sizeof(struct ldp_msg_header)))
+            goto trunc;
+
+        ldp_msg_header = (const struct ldp_msg_header *)tptr;
+        msg_len=EXTRACT_16BITS(ldp_msg_header->length);
+        msg_type=LDP_MASK_MSG_TYPE(EXTRACT_16BITS(ldp_msg_header->type));
+
+        /* FIXME vendor private / experimental check */
+        printf("\n\t  %s Message (0x%04x), length: %u, Message ID: 0x%08x, Flags: [%s if unknown]",
+               tok2str(ldp_msg_values,
+                       "Unknown",
+                       msg_type),
+               msg_type,
+               msg_len,
+               EXTRACT_32BITS(&ldp_msg_header->id),
+               LDP_MASK_U_BIT(EXTRACT_16BITS(&ldp_msg_header->type)) ? "continue processing" : "ignore");
+
+        msg_tptr=tptr+sizeof(struct ldp_msg_header);
+        msg_tlen=msg_len-sizeof(struct ldp_msg_header)+4; /* Type & Length fields not included */
+
+        /* did we capture enough for fully decoding the message ? */
+        if (!TTEST2(*tptr, msg_len))
+            goto trunc;
+        hexdump=FALSE;
+
+        switch(msg_type) {
+ 
+        case LDP_MSG_HELLO:
+            while(msg_tlen >= 4) {
+                processed = ldp_tlv_print(msg_tptr);
+                if (processed == 0)
+                    break;
+                msg_tlen-=processed;
+                msg_tptr+=processed;
+            }
+            break;
+
+        /*
+         *  FIXME those are the defined messages that lack a decoder
+         *  you are welcome to contribute code ;-)
+         */
+
+        case LDP_MSG_NOTIF:
+        case LDP_MSG_INIT:
+        case LDP_MSG_KEEPALIVE:
+        case LDP_MSG_ADDRESS:
+        case LDP_MSG_ADDRESS_WITHDRAW:
+        case LDP_MSG_LABEL_MAPPING:
+        case LDP_MSG_LABEL_REQUEST:
+        case LDP_MSG_LABEL_WITHDRAW:
+        case LDP_MSG_LABEL_RELEASE:
+        case LDP_MSG_LABEL_ABORT_REQUEST:
+
+        default:
+            if (vflag <= 1)
+                print_unknown_data(msg_tptr,"\n\t  ",msg_tlen);
+            break;
+        }
+        /* do we want to see an additionally hexdump ? */
+        if (vflag > 1 || hexdump==TRUE)
+            print_unknown_data(tptr+sizeof(sizeof(struct ldp_msg_header)),"\n\t  ",
+                               msg_len);
+
+        tptr+=msg_len;
+        tlen-=msg_len;
+    }
+    return;
+trunc:
+    printf("\n\t\t packet exceeded snapshot");
+}
+