Add tcpdump and libpcap.

- Update the file builder generator to handle generator specific cflags and
  includes. The tcpdump and libpcap have localised headers and need specific
  headers paths to see them. There are also module specific flags and these
  need to be passed to the lex and yacc generators.

- Add the tcpdump support.

1 files changed, 460 insertions, 0 deletions

diff --git a/freebsd/contrib/tcpdump/print-stp.c b/freebsd/contrib/tcpdump/print-stp.c
new file mode 100644
index 00000000..6cd9432e
--- /dev/null
+++ b/freebsd/contrib/tcpdump/print-stp.c
@@ -0,0 +1,460 @@
+#include <machine/rtems-bsd-user-space.h>
+
+/*
+ * Copyright (c) 2000 Lennert Buytenhek
+ *
+ * This software may be distributed either under the terms of the
+ * BSD-style license that accompanies tcpdump or the GNU General
+ * Public License
+ *
+ * Format and print IEEE 802.1d spanning tree protocol packets.
+ * Contributed by Lennert Buytenhek <buytenh@gnu.org>
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+"@(#) $Header: /tcpdump/master/tcpdump/print-stp.c,v 1.20 2007-03-18 17:11:46 hannes Exp $";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+#define	RSTP_EXTRACT_PORT_ROLE(x) (((x)&0x0C)>>2) 
+/* STP timers are expressed in multiples of 1/256th second */
+#define STP_TIME_BASE 256
+#define STP_BPDU_MSTP_MIN_LEN 102
+
+struct stp_bpdu_ {
+    u_int8_t protocol_id[2];
+    u_int8_t protocol_version;
+    u_int8_t bpdu_type;
+    u_int8_t flags;
+    u_int8_t root_id[8];
+    u_int8_t root_path_cost[4];
+    u_int8_t bridge_id[8];
+    u_int8_t port_id[2];
+    u_int8_t message_age[2];
+    u_int8_t max_age[2];
+    u_int8_t hello_time[2];
+    u_int8_t forward_delay[2];
+    u_int8_t v1_length;
+};
+
+#define STP_PROTO_REGULAR 0x00
+#define STP_PROTO_RAPID   0x02
+#define STP_PROTO_MSTP    0x03
+#define STP_PROTO_SPB     0x04
+
+struct tok stp_proto_values[] = {
+    { STP_PROTO_REGULAR, "802.1d" },
+    { STP_PROTO_RAPID, "802.1w" },
+    { STP_PROTO_MSTP, "802.1s" },
+    { STP_PROTO_SPB, "802.1aq" },
+    { 0, NULL}
+};
+
+#define STP_BPDU_TYPE_CONFIG      0x00
+#define STP_BPDU_TYPE_RSTP        0x02
+#define STP_BPDU_TYPE_TOPO_CHANGE 0x80
+
+struct tok stp_bpdu_flag_values[] = {
+    { 0x01, "Topology change" },
+    { 0x02, "Proposal" },
+    { 0x10, "Learn" },
+    { 0x20, "Forward" },
+    { 0x40, "Agreement" },
+    { 0x80, "Topology change ACK" },
+    { 0, NULL}
+};
+
+struct tok stp_bpdu_type_values[] = {
+    { STP_BPDU_TYPE_CONFIG, "Config" },
+    { STP_BPDU_TYPE_RSTP, "Rapid STP" },
+    { STP_BPDU_TYPE_TOPO_CHANGE, "Topology Change" },
+    { 0, NULL}
+};
+
+struct tok rstp_obj_port_role_values[] = {
+    { 0x00, "Unknown" },
+    { 0x01, "Alternate" },
+    { 0x02, "Root" },
+    { 0x03, "Designated" },
+    { 0, NULL}
+};
+
+static char *
+stp_print_bridge_id(const u_char *p)
+{
+    static char bridge_id_str[sizeof("pppp.aa:bb:cc:dd:ee:ff")];
+
+    snprintf(bridge_id_str, sizeof(bridge_id_str),
+             "%.2x%.2x.%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
+             p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
+
+    return bridge_id_str;
+}
+
+static void
+stp_print_config_bpdu(const struct stp_bpdu_ *stp_bpdu, u_int length)
+{
+    printf(", Flags [%s]",
+           bittok2str(stp_bpdu_flag_values, "none", stp_bpdu->flags));
+
+    printf(", bridge-id %s.%04x, length %u",
+           stp_print_bridge_id((const u_char *)&stp_bpdu->bridge_id),
+           EXTRACT_16BITS(&stp_bpdu->port_id), length);
+
+    /* in non-verbose mode just print the bridge-id */
+    if (!vflag) {
+        return;
+    }
+
+    printf("\n\tmessage-age %.2fs, max-age %.2fs"
+           ", hello-time %.2fs, forwarding-delay %.2fs",
+           (float)EXTRACT_16BITS(&stp_bpdu->message_age) / STP_TIME_BASE,
+           (float)EXTRACT_16BITS(&stp_bpdu->max_age) / STP_TIME_BASE,
+           (float)EXTRACT_16BITS(&stp_bpdu->hello_time) / STP_TIME_BASE,
+           (float)EXTRACT_16BITS(&stp_bpdu->forward_delay) / STP_TIME_BASE);
+
+    printf("\n\troot-id %s, root-pathcost %u",
+           stp_print_bridge_id((const u_char *)&stp_bpdu->root_id),
+           EXTRACT_32BITS(&stp_bpdu->root_path_cost));
+
+    /* Port role is only valid for 802.1w */
+    if (stp_bpdu->protocol_version == STP_PROTO_RAPID) {
+        printf(", port-role %s",
+               tok2str(rstp_obj_port_role_values, "Unknown",
+                       RSTP_EXTRACT_PORT_ROLE(stp_bpdu->flags)));
+    }
+}
+
+/*
+ * MSTP packet format
+ * Ref. IEEE 802.1Q 2003 Ed. Section 14
+ *
+ * MSTP BPDU
+ *
+ * 2 -  bytes Protocol Id
+ * 1 -  byte  Protocol Ver. 
+ * 1 -  byte  BPDU tye
+ * 1 -  byte  Flags
+ * 8 -  bytes CIST Root Identifier
+ * 4 -  bytes CIST External Path Cost
+ * 8 -  bytes CIST Regional Root Identifier
+ * 2 -  bytes CIST Port Identifier
+ * 2 -  bytes Message Age
+ * 2 -  bytes Max age
+ * 2 -  bytes Hello Time
+ * 2 -  bytes Forward delay
+ * 1 -  byte  Version 1 length. Must be 0
+ * 2 -  bytes Version 3 length
+ * 1 -  byte  Config Identifier
+ * 32 - bytes Config Name
+ * 2 -  bytes Revision level
+ * 16 - bytes Config Digest [MD5]
+ * 4 -  bytes CIST Internal Root Path Cost
+ * 8 -  bytes CIST Bridge Identifier
+ * 1 -  byte  CIST Remaining Hops
+ * 16 - bytes MSTI information [Max 64 MSTI, each 16 bytes]
+ *
+ *
+ * SPB BPDU
+ * Ref. IEEE 802.1aq. Section 14
+ *
+ * 2 -  bytes Version 4 length
+ * 1 -  byte  Aux Config Identifier  
+ * 32 - bytes Aux Config Name
+ * 2 -  bytes Aux Revision level
+ * 16 - bytes Aux Config Digest [MD5]
+ * 1 -  byte  (1 - 2) Agreement Number 
+ *            (3 - 4) Discarded Agreement Number
+ *            (5) Agreement Valid Flag
+ *            (6) Restricted Role Flag
+ *            (7 - 8) Unused sent zero
+ * 1 -  byte Unused
+ * 1 -  byte (1 - 4) Agreement Digest Format Identifier
+ *           (5 - 8) Agreement Digest Format Capabilities
+ * 1 -  byte (1 - 4) Agreement Digest Convention Identifier
+ *           (5 - 8) Agreement Digest Convention Capabilities
+ * 2 -  bytes Agreement Digest Edge Count
+ * 8 -  byte Reserved Set
+ * 20 - bytes Computed Topology Digest
+ *
+ *
+ * MSTI Payload
+ *
+ * 1 - byte  MSTI flag
+ * 8 - bytes MSTI Regional Root Identifier
+ * 4 - bytes MSTI Regional Path Cost
+ * 1 - byte  MSTI Bridge Priority
+ * 1 - byte  MSTI Port Priority
+ * 1 - byte  MSTI Remaining Hops
+ *
+ */
+
+#define MST_BPDU_MSTI_LENGTH		    16
+#define MST_BPDU_CONFIG_INFO_LENGTH	    64
+
+/* Offsets of fields from the begginning for the packet */
+#define MST_BPDU_VER3_LEN_OFFSET	    36
+#define MST_BPDU_CONFIG_NAME_OFFSET	    39
+#define MST_BPDU_CONFIG_DIGEST_OFFSET	    73
+#define MST_BPDU_CIST_INT_PATH_COST_OFFSET  89
+#define MST_BPDU_CIST_BRIDGE_ID_OFFSET	    93
+#define MST_BPDU_CIST_REMAIN_HOPS_OFFSET    101
+#define MST_BPDU_MSTI_OFFSET		    102
+/* Offsets within  an MSTI */
+#define MST_BPDU_MSTI_ROOT_PRIO_OFFSET	    1
+#define MST_BPDU_MSTI_ROOT_PATH_COST_OFFSET 9
+#define MST_BPDU_MSTI_BRIDGE_PRIO_OFFSET    13
+#define MST_BPDU_MSTI_PORT_PRIO_OFFSET	    14
+#define MST_BPDU_MSTI_REMAIN_HOPS_OFFSET    15
+
+#define SPB_BPDU_MIN_LEN                  87
+#define SPB_BPDU_CONFIG_NAME_OFFSET       3
+#define SPB_BPDU_CONFIG_REV_OFFSET        SPB_BPDU_CONFIG_NAME_OFFSET + 32
+#define SPB_BPDU_CONFIG_DIGEST_OFFSET     SPB_BPDU_CONFIG_REV_OFFSET + 2
+#define SPB_BPDU_AGREEMENT_OFFSET         SPB_BPDU_CONFIG_DIGEST_OFFSET + 16
+#define SPB_BPDU_AGREEMENT_UNUSED_OFFSET  SPB_BPDU_AGREEMENT_OFFSET + 1
+#define SPB_BPDU_AGREEMENT_FORMAT_OFFSET  SPB_BPDU_AGREEMENT_UNUSED_OFFSET + 1
+#define SPB_BPDU_AGREEMENT_CON_OFFSET     SPB_BPDU_AGREEMENT_FORMAT_OFFSET + 1
+#define SPB_BPDU_AGREEMENT_EDGE_OFFSET    SPB_BPDU_AGREEMENT_CON_OFFSET + 1
+#define SPB_BPDU_AGREEMENT_RES1_OFFSET    SPB_BPDU_AGREEMENT_EDGE_OFFSET + 2
+#define SPB_BPDU_AGREEMENT_RES2_OFFSET    SPB_BPDU_AGREEMENT_RES1_OFFSET + 4
+#define SPB_BPDU_AGREEMENT_DIGEST_OFFSET  SPB_BPDU_AGREEMENT_RES2_OFFSET + 4
+
+
+static void
+stp_print_mstp_bpdu(const struct stp_bpdu_ *stp_bpdu, u_int length)
+{
+    const u_char *ptr;
+    u_int16_t	    v3len;
+    u_int16_t	    len;
+    u_int16_t	    msti;
+    u_int16_t	    offset;
+
+    ptr = (const u_char *)stp_bpdu;
+    printf(", CIST Flags [%s], length %u",
+           bittok2str(stp_bpdu_flag_values, "none", stp_bpdu->flags), length);
+
+    /*
+     * in non-verbose mode just print the flags. We dont read that much
+     * of the packet (DEFAULT_SNAPLEN) to print out cist bridge-id
+     */
+    if (!vflag) {
+        return;
+    }
+
+    printf("\n\tport-role %s, ",
+           tok2str(rstp_obj_port_role_values, "Unknown",
+                   RSTP_EXTRACT_PORT_ROLE(stp_bpdu->flags)));
+
+    printf("CIST root-id %s, CIST ext-pathcost %u ",
+           stp_print_bridge_id((const u_char *)&stp_bpdu->root_id),
+           EXTRACT_32BITS(&stp_bpdu->root_path_cost));
+
+    printf("\n\tCIST regional-root-id %s, ",
+           stp_print_bridge_id((const u_char *)&stp_bpdu->bridge_id));
+
+    printf("CIST port-id %04x, ", EXTRACT_16BITS(&stp_bpdu->port_id));
+
+    printf("\n\tmessage-age %.2fs, max-age %.2fs"
+           ", hello-time %.2fs, forwarding-delay %.2fs",
+           (float)EXTRACT_16BITS(&stp_bpdu->message_age) / STP_TIME_BASE,
+           (float)EXTRACT_16BITS(&stp_bpdu->max_age) / STP_TIME_BASE,
+           (float)EXTRACT_16BITS(&stp_bpdu->hello_time) / STP_TIME_BASE,
+           (float)EXTRACT_16BITS(&stp_bpdu->forward_delay) / STP_TIME_BASE);
+
+    printf ("\n\tv3len %d, ", EXTRACT_16BITS(ptr + MST_BPDU_VER3_LEN_OFFSET));
+    printf("MCID Name %s, rev %u, "
+            "\n\t\tdigest %08x%08x%08x%08x, ",
+            ptr + MST_BPDU_CONFIG_NAME_OFFSET,
+	          EXTRACT_16BITS(ptr + MST_BPDU_CONFIG_NAME_OFFSET + 32),
+      	    EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET),
+        	  EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 4),
+	          EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 8),
+	          EXTRACT_32BITS(ptr + MST_BPDU_CONFIG_DIGEST_OFFSET + 12));
+
+    printf ("CIST int-root-pathcost %u, ", 
+            EXTRACT_32BITS(ptr + MST_BPDU_CIST_INT_PATH_COST_OFFSET));  
+
+    printf("\n\tCIST bridge-id %s, ",
+           stp_print_bridge_id(ptr + MST_BPDU_CIST_BRIDGE_ID_OFFSET));
+
+    printf("CIST remaining-hops %d", ptr[MST_BPDU_CIST_REMAIN_HOPS_OFFSET]);
+
+    /* Dump all MSTI's */
+    v3len = EXTRACT_16BITS(ptr + MST_BPDU_VER3_LEN_OFFSET);
+    if (v3len > MST_BPDU_CONFIG_INFO_LENGTH) {
+        len = v3len - MST_BPDU_CONFIG_INFO_LENGTH;
+        offset = MST_BPDU_MSTI_OFFSET;
+        while (len >= MST_BPDU_MSTI_LENGTH) {
+            msti = EXTRACT_16BITS(ptr + offset +
+                                  MST_BPDU_MSTI_ROOT_PRIO_OFFSET);
+            msti = msti & 0x0FFF;
+
+            printf("\n\tMSTI %d, Flags [%s], port-role %s", 
+                   msti, bittok2str(stp_bpdu_flag_values, "none", ptr[offset]),
+                   tok2str(rstp_obj_port_role_values, "Unknown",
+                           RSTP_EXTRACT_PORT_ROLE(ptr[offset])));
+            printf("\n\t\tMSTI regional-root-id %s, pathcost %u",
+                   stp_print_bridge_id(ptr + offset +
+                                       MST_BPDU_MSTI_ROOT_PRIO_OFFSET),
+                   EXTRACT_32BITS(ptr + offset +
+                                  MST_BPDU_MSTI_ROOT_PATH_COST_OFFSET));
+            printf("\n\t\tMSTI bridge-prio %d, port-prio %d, hops %d",
+                   ptr[offset + MST_BPDU_MSTI_BRIDGE_PRIO_OFFSET] >> 4,
+                   ptr[offset + MST_BPDU_MSTI_PORT_PRIO_OFFSET] >> 4,
+                   ptr[offset + MST_BPDU_MSTI_REMAIN_HOPS_OFFSET]);
+
+            len -= MST_BPDU_MSTI_LENGTH;
+            offset += MST_BPDU_MSTI_LENGTH;
+        }
+    }
+
+    if ((length-offset) >= SPB_BPDU_MIN_LEN)
+    {
+      printf("\n\tv4len %d AUXMCID Name %s, Rev %u, \n\t\tdigest %08x%08x%08x%08x",
+              EXTRACT_16BITS (ptr + offset),
+              ptr + offset + SPB_BPDU_CONFIG_NAME_OFFSET,
+              EXTRACT_16BITS(ptr + offset + SPB_BPDU_CONFIG_REV_OFFSET),
+              EXTRACT_32BITS(ptr + offset + SPB_BPDU_CONFIG_DIGEST_OFFSET),
+              EXTRACT_32BITS(ptr + offset + SPB_BPDU_CONFIG_DIGEST_OFFSET + 4),
+              EXTRACT_32BITS(ptr + offset + SPB_BPDU_CONFIG_DIGEST_OFFSET + 8),
+              EXTRACT_32BITS(ptr + offset + SPB_BPDU_CONFIG_DIGEST_OFFSET + 12));
+     
+      printf("\n\tAgreement num %d, Discarded Agreement num %d, Agreement valid-"
+              "flag %d, \n\tRestricted role-flag: %d, Format id %d cap %d, "
+              "Convention id %d cap %d, \n\tEdge count %d, "
+              "Agreement digest %08x%08x%08x%08x%08x\n",
+              ptr[offset + SPB_BPDU_AGREEMENT_OFFSET]>>6, 
+              ptr[offset + SPB_BPDU_AGREEMENT_OFFSET]>>4 & 0x3,
+              ptr[offset + SPB_BPDU_AGREEMENT_OFFSET]>>3 & 0x1,
+              ptr[offset + SPB_BPDU_AGREEMENT_OFFSET]>>2 & 0x1,
+              ptr[offset + SPB_BPDU_AGREEMENT_FORMAT_OFFSET]>>4,
+              ptr[offset + SPB_BPDU_AGREEMENT_FORMAT_OFFSET]&0x00ff,
+              ptr[offset + SPB_BPDU_AGREEMENT_CON_OFFSET]>>4,
+              ptr[offset + SPB_BPDU_AGREEMENT_CON_OFFSET]&0x00ff,
+              EXTRACT_16BITS(ptr + offset + SPB_BPDU_AGREEMENT_EDGE_OFFSET),
+              EXTRACT_32BITS(ptr + offset + SPB_BPDU_AGREEMENT_DIGEST_OFFSET),
+              EXTRACT_32BITS(ptr + offset + SPB_BPDU_AGREEMENT_DIGEST_OFFSET)+4,
+              EXTRACT_32BITS(ptr + offset + SPB_BPDU_AGREEMENT_DIGEST_OFFSET)+8,
+              EXTRACT_32BITS(ptr + offset + SPB_BPDU_AGREEMENT_DIGEST_OFFSET)+12,
+              EXTRACT_32BITS(ptr + offset + SPB_BPDU_AGREEMENT_DIGEST_OFFSET)+16);
+      }
+}
+
+/*
+ * Print 802.1d / 802.1w / 802.1q (mstp) / 802.1aq (spb) packets.
+ */
+void
+stp_print(const u_char *p, u_int length)
+{
+    const struct stp_bpdu_ *stp_bpdu;
+    u_int16_t              mstp_len;
+    u_int16_t              spb_len;
+    
+    stp_bpdu = (struct stp_bpdu_*)p;
+
+    /* Minimum STP Frame size. */
+    if (length < 4)
+        goto trunc;
+        
+    if (EXTRACT_16BITS(&stp_bpdu->protocol_id)) {
+        printf("unknown STP version, length %u", length);
+        return;
+    }
+
+    printf("STP %s", tok2str(stp_proto_values, "Unknown STP protocol (0x%02x)",
+                         stp_bpdu->protocol_version));
+
+    switch (stp_bpdu->protocol_version) {
+    case STP_PROTO_REGULAR:
+    case STP_PROTO_RAPID:
+    case STP_PROTO_MSTP:
+    case STP_PROTO_SPB:
+        break;
+    default:
+        return;
+    }
+
+    printf(", %s", tok2str(stp_bpdu_type_values, "Unknown BPDU Type (0x%02x)",
+                           stp_bpdu->bpdu_type));
+
+    switch (stp_bpdu->bpdu_type) {
+    case STP_BPDU_TYPE_CONFIG:
+        if (length < sizeof(struct stp_bpdu_) - 1) {
+            goto trunc;
+        }
+        stp_print_config_bpdu(stp_bpdu, length);
+        break;
+
+    case STP_BPDU_TYPE_RSTP:
+        if (stp_bpdu->protocol_version == STP_PROTO_RAPID) {
+            if (length < sizeof(struct stp_bpdu_)) {
+                goto trunc;
+            }
+            stp_print_config_bpdu(stp_bpdu, length);
+        } else if (stp_bpdu->protocol_version == STP_PROTO_MSTP ||
+                   stp_bpdu->protocol_version == STP_PROTO_SPB) {
+            if (length < STP_BPDU_MSTP_MIN_LEN) {
+                goto trunc;
+            }
+
+            if (stp_bpdu->v1_length != 0) {
+                /* FIX ME: Emit a message here ? */
+                goto trunc;
+            }
+
+            /* Validate v3 length */
+            mstp_len = EXTRACT_16BITS(p + MST_BPDU_VER3_LEN_OFFSET);
+            mstp_len += 2;  /* length encoding itself is 2 bytes */
+            if (length < (sizeof(struct stp_bpdu_) + mstp_len)) {
+                goto trunc;
+            }
+
+            if (stp_bpdu->protocol_version == STP_PROTO_SPB)
+            {
+              /* Validate v4 length */
+              spb_len = EXTRACT_16BITS (p + MST_BPDU_VER3_LEN_OFFSET + mstp_len);
+              spb_len += 2;
+              if (length < (sizeof(struct stp_bpdu_) + mstp_len + spb_len) ||
+                  spb_len < SPB_BPDU_MIN_LEN) {
+                goto trunc;
+              }
+            }
+
+            stp_print_mstp_bpdu(stp_bpdu, length);
+        }
+        break;
+
+    case STP_BPDU_TYPE_TOPO_CHANGE:
+        /* always empty message - just break out */
+        break;
+
+    default:
+        break;
+    }
+
+    return;
+ trunc:
+    printf("[|stp %d]", length);
+}
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 4
+ * End:
+ */