Adding upstream version 4.99.4.upstream/4.99.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 214 insertions, 0 deletions

diff --git a/print-vqp.c b/print-vqp.c
new file mode 100644
index 0000000..1b2f6bf
--- /dev/null
+++ b/print-vqp.c
@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 1998-2006 The TCPDUMP project
+ *
+ * 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 Carles Kishimoto <Carles.Kishimoto@bsc.es>
+ */
+
+/* \summary: Cisco VLAN Query Protocol (VQP) printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#define ND_LONGJMP_FROM_TCHECK
+#include "netdissect.h"
+#include "extract.h"
+#include "addrtoname.h"
+
+#define VQP_VERSION 1
+
+/*
+ * VQP 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
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |   Constant    | Packet type   |  Error Code   |    nitems     |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ * |                Packet Sequence Number (4 bytes)               |
+ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+
+struct vqp_common_header_t {
+    nd_uint8_t  version;
+    nd_uint8_t  msg_type;
+    nd_uint8_t  error_code;
+    nd_uint8_t  nitems;
+    nd_uint32_t sequence;
+};
+
+struct vqp_obj_tlv_t {
+    nd_uint32_t obj_type;
+    nd_uint16_t obj_length;
+};
+
+#define VQP_OBJ_REQ_JOIN_PORT  0x01
+#define VQP_OBJ_RESP_VLAN      0x02
+#define VQP_OBJ_REQ_RECONFIRM  0x03
+#define VQP_OBJ_RESP_RECONFIRM 0x04
+
+static const struct tok vqp_msg_type_values[] = {
+    { VQP_OBJ_REQ_JOIN_PORT, "Request, Join Port"},
+    { VQP_OBJ_RESP_VLAN, "Response, VLAN"},
+    { VQP_OBJ_REQ_RECONFIRM, "Request, Reconfirm"},
+    { VQP_OBJ_RESP_RECONFIRM, "Response, Reconfirm"},
+    { 0, NULL}
+};
+
+static const struct tok vqp_error_code_values[] = {
+    { 0x00, "No error"},
+    { 0x03, "Access denied"},
+    { 0x04, "Shutdown port"},
+    { 0x05, "Wrong VTP domain"},
+    { 0, NULL}
+};
+
+/* FIXME the heading 0x0c looks ugly - those must be flags etc. */
+#define VQP_OBJ_IP_ADDRESS    0x0c01
+#define VQP_OBJ_PORT_NAME     0x0c02
+#define VQP_OBJ_VLAN_NAME     0x0c03
+#define VQP_OBJ_VTP_DOMAIN    0x0c04
+#define VQP_OBJ_ETHERNET_PKT  0x0c05
+#define VQP_OBJ_MAC_NULL      0x0c06
+#define VQP_OBJ_MAC_ADDRESS   0x0c08
+
+static const struct tok vqp_obj_values[] = {
+    { VQP_OBJ_IP_ADDRESS, "Client IP Address" },
+    { VQP_OBJ_PORT_NAME, "Port Name" },
+    { VQP_OBJ_VLAN_NAME, "VLAN Name" },
+    { VQP_OBJ_VTP_DOMAIN, "VTP Domain" },
+    { VQP_OBJ_ETHERNET_PKT, "Ethernet Packet" },
+    { VQP_OBJ_MAC_NULL, "MAC Null" },
+    { VQP_OBJ_MAC_ADDRESS, "MAC Address" },
+    { 0, NULL}
+};
+
+void
+vqp_print(netdissect_options *ndo, const u_char *pptr, u_int len)
+{
+    const struct vqp_common_header_t *vqp_common_header;
+    const struct vqp_obj_tlv_t *vqp_obj_tlv;
+
+    const u_char *tptr;
+    uint8_t version;
+    uint16_t vqp_obj_len;
+    uint32_t vqp_obj_type;
+    u_int tlen;
+    uint8_t nitems;
+
+    ndo->ndo_protocol = "vqp";
+    tptr=pptr;
+    tlen = len;
+    vqp_common_header = (const struct vqp_common_header_t *)pptr;
+    ND_TCHECK_SIZE(vqp_common_header);
+    if (sizeof(struct vqp_common_header_t) > tlen)
+        goto invalid;
+    version = GET_U_1(vqp_common_header->version);
+
+    /*
+     * Sanity checking of the header.
+     */
+    if (version != VQP_VERSION) {
+	ND_PRINT("VQP version %u packet not supported",
+               version);
+	return;
+    }
+
+    /* in non-verbose mode just lets print the basic Message Type */
+    if (ndo->ndo_vflag < 1) {
+        ND_PRINT("VQPv%u %s Message, error-code %s (%u), length %u",
+               version,
+               tok2str(vqp_msg_type_values, "unknown (%u)",GET_U_1(vqp_common_header->msg_type)),
+               tok2str(vqp_error_code_values, "unknown", GET_U_1(vqp_common_header->error_code)),
+               GET_U_1(vqp_common_header->error_code),
+               len);
+        return;
+    }
+
+    /* ok they seem to want to know everything - lets fully decode it */
+    nitems = GET_U_1(vqp_common_header->nitems);
+    ND_PRINT("\n\tVQPv%u, %s Message, error-code %s (%u), seq 0x%08x, items %u, length %u",
+           version,
+	   tok2str(vqp_msg_type_values, "unknown (%u)",GET_U_1(vqp_common_header->msg_type)),
+	   tok2str(vqp_error_code_values, "unknown", GET_U_1(vqp_common_header->error_code)),
+	   GET_U_1(vqp_common_header->error_code),
+	   GET_BE_U_4(vqp_common_header->sequence),
+	   nitems,
+           len);
+
+    /* skip VQP Common header */
+    tptr+=sizeof(struct vqp_common_header_t);
+    tlen-=sizeof(struct vqp_common_header_t);
+
+    while (nitems != 0 && tlen != 0) {
+
+        vqp_obj_tlv = (const struct vqp_obj_tlv_t *)tptr;
+        ND_TCHECK_SIZE(vqp_obj_tlv);
+        if (sizeof(struct vqp_obj_tlv_t) > tlen)
+            goto invalid;
+        vqp_obj_type = GET_BE_U_4(vqp_obj_tlv->obj_type);
+        vqp_obj_len = GET_BE_U_2(vqp_obj_tlv->obj_length);
+        tptr+=sizeof(struct vqp_obj_tlv_t);
+        tlen-=sizeof(struct vqp_obj_tlv_t);
+
+        ND_PRINT("\n\t  %s Object (0x%08x), length %u, value: ",
+               tok2str(vqp_obj_values, "Unknown", vqp_obj_type),
+               vqp_obj_type, vqp_obj_len);
+
+        /* basic sanity check */
+        if (vqp_obj_type == 0 || vqp_obj_len ==0) {
+            return;
+        }
+
+        /* did we capture enough for fully decoding the object ? */
+        ND_TCHECK_LEN(tptr, vqp_obj_len);
+        if (vqp_obj_len > tlen)
+            goto invalid;
+
+        switch(vqp_obj_type) {
+	case VQP_OBJ_IP_ADDRESS:
+            if (vqp_obj_len != 4)
+                goto invalid;
+            ND_PRINT("%s (0x%08x)", GET_IPADDR_STRING(tptr),
+                     GET_BE_U_4(tptr));
+            break;
+            /* those objects have similar semantics - fall through */
+        case VQP_OBJ_PORT_NAME:
+	case VQP_OBJ_VLAN_NAME:
+	case VQP_OBJ_VTP_DOMAIN:
+	case VQP_OBJ_ETHERNET_PKT:
+            nd_printjnp(ndo, tptr, vqp_obj_len);
+            break;
+            /* those objects have similar semantics - fall through */
+	case VQP_OBJ_MAC_ADDRESS:
+	case VQP_OBJ_MAC_NULL:
+            if (vqp_obj_len != MAC_ADDR_LEN)
+                goto invalid;
+	      ND_PRINT("%s", GET_ETHERADDR_STRING(tptr));
+              break;
+        default:
+            if (ndo->ndo_vflag <= 1)
+                print_unknown_data(ndo,tptr, "\n\t    ", vqp_obj_len);
+            break;
+        }
+	tptr += vqp_obj_len;
+	tlen -= vqp_obj_len;
+	nitems--;
+    }
+    return;
+invalid:
+    nd_print_invalid(ndo);
+}