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Add EXTRACT_ calls.
[tcpdump] / print-egp.c
diff --git a/print-egp.c b/print-egp.c
index f75f3d558933fec804c2b4083bedb03c221144c5..b4a5a970e07fbef8f7012228f497497d59440e31 100644 (file)
--- a/print-egp.c
+++ b/print-egp.c
@@ -18,35 +18,32 @@
  * Initial contribution from Jeff Honig ([email protected]).
  */
 
  * Initial contribution from Jeff Honig ([email protected]).
  */
 
+/* \summary: Exterior Gateway Protocol (EGP) printer */
+
+/* specification: RFC 827 */
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include <tcpdump-stdinc.h>
+#include <string.h>
 
 
-#include <stdio.h>
+#include <netdissect-stdinc.h>
 
 
-#include "interface.h"
+#include "netdissect.h"
 #include "addrtoname.h"
 #include "extract.h"
 
 #include "addrtoname.h"
 #include "extract.h"
 
-#ifndef lint
-static const char rcsid[] _U_ =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-egp.c,v 1.35 2003-11-15 00:39:20 guy Exp $ (LBL)";
-#endif
-#include "ip.h"
-
 struct egp_packet {
 struct egp_packet {
-       u_int8_t  egp_version;
+       nd_uint8_t  egp_version;
 #define        EGP_VERSION     2
 #define        EGP_VERSION     2
-       u_int8_t  egp_type;
+       nd_uint8_t  egp_type;
 #define  EGPT_ACQUIRE  3
 #define  EGPT_REACH    5
 #define  EGPT_POLL     2
 #define  EGPT_UPDATE   1
 #define  EGPT_ERROR    8
 #define  EGPT_ACQUIRE  3
 #define  EGPT_REACH    5
 #define  EGPT_POLL     2
 #define  EGPT_UPDATE   1
 #define  EGPT_ERROR    8
-       u_int8_t  egp_code;
+       nd_uint8_t  egp_code;
 #define  EGPC_REQUEST  0
 #define  EGPC_CONFIRM  1
 #define  EGPC_REFUSE   2
 #define  EGPC_REQUEST  0
 #define  EGPC_CONFIRM  1
 #define  EGPC_REFUSE   2
@@ -54,7 +51,7 @@ struct egp_packet {
 #define  EGPC_CEASEACK 4
 #define  EGPC_HELLO    0
 #define  EGPC_HEARDU   1
 #define  EGPC_CEASEACK 4
 #define  EGPC_HELLO    0
 #define  EGPC_HEARDU   1
-       u_int8_t  egp_status;
+       nd_uint8_t  egp_status;
 #define  EGPS_UNSPEC   0
 #define  EGPS_ACTIVE   1
 #define  EGPS_PASSIVE  2
 #define  EGPS_UNSPEC   0
 #define  EGPS_ACTIVE   1
 #define  EGPS_PASSIVE  2
@@ -67,13 +64,13 @@ struct egp_packet {
 #define  EGPS_UP       1
 #define  EGPS_DOWN     2
 #define  EGPS_UNSOL    0x80
 #define  EGPS_UP       1
 #define  EGPS_DOWN     2
 #define  EGPS_UNSOL    0x80
-       u_int16_t  egp_checksum;
-       u_int16_t  egp_as;
-       u_int16_t  egp_sequence;
+       nd_uint16_t  egp_checksum;
+       nd_uint16_t  egp_as;
+       nd_uint16_t  egp_sequence;
        union {
        union {
-               u_int16_t  egpu_hello;
-               u_int8_t egpu_gws[2];
-               u_int16_t  egpu_reason;
+               nd_uint16_t egpu_hello;
+               nd_uint8_t  egpu_gws[2];
+               nd_uint16_t egpu_reason;
 #define  EGPR_UNSPEC   0
 #define  EGPR_BADHEAD  1
 #define  EGPR_BADDATA  2
 #define  EGPR_UNSPEC   0
 #define  EGPR_BADHEAD  1
 #define  EGPR_BADDATA  2
@@ -87,14 +84,14 @@ struct egp_packet {
 #define  egp_extgw  egp_handg.egpu_gws[1]
 #define  egp_reason  egp_handg.egpu_reason
        union {
 #define  egp_extgw  egp_handg.egpu_gws[1]
 #define  egp_reason  egp_handg.egpu_reason
        union {
-               u_int16_t  egpu_poll;
-               u_int32_t egpu_sourcenet;
+               nd_uint16_t egpu_poll;
+               nd_ipv4 egpu_sourcenet;
        } egp_pands;
 #define  egp_poll  egp_pands.egpu_poll
 #define  egp_sourcenet  egp_pands.egpu_sourcenet
 };
 
        } egp_pands;
 #define  egp_poll  egp_pands.egpu_poll
 #define  egp_sourcenet  egp_pands.egpu_sourcenet
 };
 
-const char *egp_acquire_codes[] = {
+static const char *egp_acquire_codes[] = {
        "request",
        "confirm",
        "refuse",
        "request",
        "confirm",
        "refuse",
@@ -102,7 +99,7 @@ const char *egp_acquire_codes[] = {
        "cease_ack"
 };
 
        "cease_ack"
 };
 
-const char *egp_acquire_status[] = {
+static const char *egp_acquire_status[] = {
        "unspecified",
        "active_mode",
        "passive_mode",
        "unspecified",
        "active_mode",
        "passive_mode",
@@ -113,18 +110,18 @@ const char *egp_acquire_status[] = {
        "protocol_violation"
 };
 
        "protocol_violation"
 };
 
-const char *egp_reach_codes[] = {
+static const char *egp_reach_codes[] = {
        "hello",
        "i-h-u"
 };
 
        "hello",
        "i-h-u"
 };
 
-const char *egp_status_updown[] = {
+static const char *egp_status_updown[] = {
        "indeterminate",
        "up",
        "down"
 };
 
        "indeterminate",
        "up",
        "down"
 };
 
-const char *egp_reasons[] = {
+static const char *egp_reasons[] = {
        "unspecified",
        "bad_EGP_header_format",
        "bad_EGP_data_field_format",
        "unspecified",
        "bad_EGP_header_format",
        "bad_EGP_data_field_format",
@@ -135,17 +132,18 @@ const char *egp_reasons[] = {
 };
 
 static void
 };
 
 static void
-egpnrprint(register const struct egp_packet *egp)
+egpnrprint(netdissect_options *ndo,
+           const struct egp_packet *egp, u_int length)
 {
 {
-       register const u_int8_t *cp;
-       u_int32_t addr;
-       register u_int32_t net;
-       register u_int netlen;
-       int gateways, distances, networks;
-       int t_gateways;
+       const uint8_t *cp;
+       uint32_t addr;
+       uint32_t net;
+       u_int netlen;
+       u_int gateways, distances, networks;
+       u_int intgw, extgw, t_gateways;
        const char *comma;
 
        const char *comma;
 
-       addr = egp->egp_sourcenet;
+       addr = EXTRACT_IPV4_TO_NETWORK_ORDER(egp->egp_sourcenet);
        if (IN_CLASSA(addr)) {
                net = addr & IN_CLASSA_NET;
                netlen = 1;
        if (IN_CLASSA(addr)) {
                net = addr & IN_CLASSA_NET;
                netlen = 1;
@@ -159,112 +157,159 @@ egpnrprint(register const struct egp_packet *egp)
                net = 0;
                netlen = 0;
        }
                net = 0;
                netlen = 0;
        }
-       cp = (u_int8_t *)(egp + 1);
+       cp = (const uint8_t *)(egp + 1);
+       length -= sizeof(*egp);
 
 
-       t_gateways = egp->egp_intgw + egp->egp_extgw;
+       intgw = EXTRACT_U_1(egp->egp_intgw);
+       extgw = EXTRACT_U_1(egp->egp_extgw);
+       t_gateways = intgw + extgw;
        for (gateways = 0; gateways < t_gateways; ++gateways) {
                /* Pickup host part of gateway address */
                addr = 0;
        for (gateways = 0; gateways < t_gateways; ++gateways) {
                /* Pickup host part of gateway address */
                addr = 0;
-               TCHECK2(cp[0], 4 - netlen);
+               if (length < 4 - netlen)
+                       goto trunc;
+               ND_TCHECK_LEN(cp, 4 - netlen);
                switch (netlen) {
 
                case 1:
                switch (netlen) {
 
                case 1:
-                       addr = *cp++;
+                       addr = EXTRACT_U_1(cp);
+                       cp++;
                        /* fall through */
                case 2:
                        /* fall through */
                case 2:
-                       addr = (addr << 8) | *cp++;
+                       addr = (addr << 8) | EXTRACT_U_1(cp);
+                       cp++;
                        /* fall through */
                case 3:
                        /* fall through */
                case 3:
-                       addr = (addr << 8) | *cp++;
+                       addr = (addr << 8) | EXTRACT_U_1(cp);
+                       cp++;
+                       break;
                }
                addr |= net;
                }
                addr |= net;
-               TCHECK2(cp[0], 1);
-               distances = *cp++;
-               printf(" %s %s ",
-                      gateways < (int)egp->egp_intgw ? "int" : "ext",
-                      ipaddr_string(&addr));
+               length -= 4 - netlen;
+               if (length < 1)
+                       goto trunc;
+               ND_TCHECK_1(cp);
+               distances = EXTRACT_U_1(cp);
+               cp++;
+               length--;
+               ND_PRINT((ndo, " %s %s ",
+                      gateways < intgw ? "int" : "ext",
+                      ipaddr_string(ndo, &addr)));
 
                comma = "";
 
                comma = "";
-               putchar('(');
-               while (--distances >= 0) {
-                       TCHECK2(cp[0], 2);
-                       printf("%sd%d:", comma, (int)*cp++);
+               ND_PRINT((ndo, "("));
+               while (distances != 0) {
+                       if (length < 2)
+                               goto trunc;
+                       ND_TCHECK_2(cp);
+                       ND_PRINT((ndo, "%sd%u:", comma, EXTRACT_U_1(cp)));
+                       cp++;
                        comma = ", ";
                        comma = ", ";
-                       networks = *cp++;
-                       while (--networks >= 0) {
+                       networks = EXTRACT_U_1(cp);
+                       cp++;
+                       length -= 2;
+                       while (networks != 0) {
                                /* Pickup network number */
                                /* Pickup network number */
-                               TCHECK2(cp[0], 1);
-                               addr = (u_int32_t)*cp++ << 24;
+                               if (length < 1)
+                                       goto trunc;
+                               ND_TCHECK_1(cp);
+                               addr = ((uint32_t) EXTRACT_U_1(cp)) << 24;
+                               cp++;
+                               length--;
                                if (IN_CLASSB(addr)) {
                                if (IN_CLASSB(addr)) {
-                                       TCHECK2(cp[0], 1);
-                                       addr |= (u_int32_t)*cp++ << 16;
+                                       if (length < 1)
+                                               goto trunc;
+                                       ND_TCHECK_1(cp);
+                                       addr |= ((uint32_t) EXTRACT_U_1(cp)) << 16;
+                                       cp++;
+                                       length--;
                                } else if (!IN_CLASSA(addr)) {
                                } else if (!IN_CLASSA(addr)) {
-                                       TCHECK2(cp[0], 2);
-                                       addr |= (u_int32_t)*cp++ << 16;
-                                       addr |= (u_int32_t)*cp++ << 8;
+                                       if (length < 2)
+                                               goto trunc;
+                                       ND_TCHECK_2(cp);
+                                       addr |= ((uint32_t) EXTRACT_U_1(cp)) << 16;
+                                       cp++;
+                                       addr |= ((uint32_t) EXTRACT_U_1(cp)) << 8;
+                                       cp++;
+                                       length -= 2;
                                }
                                }
-                               printf(" %s", ipaddr_string(&addr));
+                               ND_PRINT((ndo, " %s", ipaddr_string(ndo, &addr)));
+                               networks--;
                        }
                        }
+                       distances--;
                }
                }
-               putchar(')');
+               ND_PRINT((ndo, ")"));
        }
        return;
 trunc:
        }
        return;
 trunc:
-       fputs("[|]", stdout);
+       ND_PRINT((ndo, "[|]"));
 }
 
 void
 }
 
 void
-egp_print(register const u_int8_t *bp)
+egp_print(netdissect_options *ndo,
+          const uint8_t *bp, u_int length)
 {
 {
-       register const struct egp_packet *egp;
-       register int status;
-       register int code;
-       register int type;
-
-       egp = (struct egp_packet *)bp;
-       if (!TTEST(*egp)) {
-               printf("[|egp]");
+       const struct egp_packet *egp;
+       u_int version;
+       u_int type;
+       u_int code;
+       u_int status;
+
+       egp = (const struct egp_packet *)bp;
+       if (length < sizeof(*egp) || !ND_TTEST(*egp)) {
+               ND_PRINT((ndo, "[|egp]"));
                return;
        }
                return;
        }
-       (void)printf("egp: ");
 
 
-       if (egp->egp_version != EGP_VERSION) {
-               printf("[version %d]", egp->egp_version);
+       version = EXTRACT_U_1(egp->egp_version);
+        if (!ndo->ndo_vflag) {
+            ND_PRINT((ndo, "EGPv%u, AS %u, seq %u, length %u",
+                   version,
+                   EXTRACT_BE_U_2(egp->egp_as),
+                   EXTRACT_BE_U_2(egp->egp_sequence),
+                   length));
+            return;
+        } else
+            ND_PRINT((ndo, "EGPv%u, length %u",
+                   version,
+                   length));
+
+       if (version != EGP_VERSION) {
+               ND_PRINT((ndo, "[version %u]", version));
                return;
        }
                return;
        }
-       printf("as:%d seq:%d", EXTRACT_16BITS(&egp->egp_as), EXTRACT_16BITS(&egp->egp_sequence));
 
 
-       type = egp->egp_type;
-       code = egp->egp_code;
-       status = egp->egp_status;
+       type = EXTRACT_U_1(egp->egp_type);
+       code = EXTRACT_U_1(egp->egp_code);
+       status = EXTRACT_U_1(egp->egp_status);
 
        switch (type) {
        case EGPT_ACQUIRE:
 
        switch (type) {
        case EGPT_ACQUIRE:
-               printf(" acquire");
+               ND_PRINT((ndo, " acquire"));
                switch (code) {
                case EGPC_REQUEST:
                case EGPC_CONFIRM:
                switch (code) {
                case EGPC_REQUEST:
                case EGPC_CONFIRM:
-                       printf(" %s", egp_acquire_codes[code]);
+                       ND_PRINT((ndo, " %s", egp_acquire_codes[code]));
                        switch (status) {
                        case EGPS_UNSPEC:
                        case EGPS_ACTIVE:
                        case EGPS_PASSIVE:
                        switch (status) {
                        case EGPS_UNSPEC:
                        case EGPS_ACTIVE:
                        case EGPS_PASSIVE:
-                               printf(" %s", egp_acquire_status[status]);
+                               ND_PRINT((ndo, " %s", egp_acquire_status[status]));
                                break;
 
                        default:
                                break;
 
                        default:
-                               printf(" [status %d]", status);
+                               ND_PRINT((ndo, " [status %u]", status));
                                break;
                        }
                                break;
                        }
-                       printf(" hello:%d poll:%d",
-                              EXTRACT_16BITS(&egp->egp_hello),
-                              EXTRACT_16BITS(&egp->egp_poll));
+                       ND_PRINT((ndo, " hello:%u poll:%u",
+                              EXTRACT_BE_U_2(egp->egp_hello),
+                              EXTRACT_BE_U_2(egp->egp_poll)));
                        break;
 
                case EGPC_REFUSE:
                case EGPC_CEASE:
                case EGPC_CEASEACK:
                        break;
 
                case EGPC_REFUSE:
                case EGPC_CEASE:
                case EGPC_CEASEACK:
-                       printf(" %s", egp_acquire_codes[code]);
+                       ND_PRINT((ndo, " %s", egp_acquire_codes[code]));
                        switch (status ) {
                        case EGPS_UNSPEC:
                        case EGPS_NORES:
                        switch (status ) {
                        case EGPS_UNSPEC:
                        case EGPS_NORES:
@@ -272,17 +317,17 @@ egp_print(register const u_int8_t *bp)
                        case EGPS_GODOWN:
                        case EGPS_PARAM:
                        case EGPS_PROTO:
                        case EGPS_GODOWN:
                        case EGPS_PARAM:
                        case EGPS_PROTO:
-                               printf(" %s", egp_acquire_status[status]);
+                               ND_PRINT((ndo, " %s", egp_acquire_status[status]));
                                break;
 
                        default:
                                break;
 
                        default:
-                               printf("[status %d]", status);
+                               ND_PRINT((ndo, "[status %u]", status));
                                break;
                        }
                        break;
 
                default:
                                break;
                        }
                        break;
 
                default:
-                       printf("[code %d]", code);
+                       ND_PRINT((ndo, "[code %u]", code));
                        break;
                }
                break;
                        break;
                }
                break;
@@ -292,61 +337,61 @@ egp_print(register const u_int8_t *bp)
 
                case EGPC_HELLO:
                case EGPC_HEARDU:
 
                case EGPC_HELLO:
                case EGPC_HEARDU:
-                       printf(" %s", egp_reach_codes[code]);
+                       ND_PRINT((ndo, " %s", egp_reach_codes[code]));
                        if (status <= EGPS_DOWN)
                        if (status <= EGPS_DOWN)
-                               printf(" state:%s", egp_status_updown[status]);
+                               ND_PRINT((ndo, " state:%s", egp_status_updown[status]));
                        else
                        else
-                               printf(" [status %d]", status);
+                               ND_PRINT((ndo, " [status %u]", status));
                        break;
 
                default:
                        break;
 
                default:
-                       printf("[reach code %d]", code);
+                       ND_PRINT((ndo, "[reach code %u]", code));
                        break;
                }
                break;
 
        case EGPT_POLL:
                        break;
                }
                break;
 
        case EGPT_POLL:
-               printf(" poll");
-               if (egp->egp_status <= EGPS_DOWN)
-                       printf(" state:%s", egp_status_updown[status]);
+               ND_PRINT((ndo, " poll"));
+               if (status <= EGPS_DOWN)
+                       ND_PRINT((ndo, " state:%s", egp_status_updown[status]));
                else
                else
-                       printf(" [status %d]", status);
-               printf(" net:%s", ipaddr_string(&egp->egp_sourcenet));
+                       ND_PRINT((ndo, " [status %u]", status));
+               ND_PRINT((ndo, " net:%s", ipaddr_string(ndo, &egp->egp_sourcenet)));
                break;
 
        case EGPT_UPDATE:
                break;
 
        case EGPT_UPDATE:
-               printf(" update");
+               ND_PRINT((ndo, " update"));
                if (status & EGPS_UNSOL) {
                        status &= ~EGPS_UNSOL;
                if (status & EGPS_UNSOL) {
                        status &= ~EGPS_UNSOL;
-                       printf(" unsolicited");
+                       ND_PRINT((ndo, " unsolicited"));
                }
                if (status <= EGPS_DOWN)
                }
                if (status <= EGPS_DOWN)
-                       printf(" state:%s", egp_status_updown[status]);
+                       ND_PRINT((ndo, " state:%s", egp_status_updown[status]));
                else
                else
-                       printf(" [status %d]", status);
-               printf(" %s int %d ext %d",
-                      ipaddr_string(&egp->egp_sourcenet),
-                      egp->egp_intgw,
-                      egp->egp_extgw);
-               if (vflag)
-                       egpnrprint(egp);
+                       ND_PRINT((ndo, " [status %u]", status));
+               ND_PRINT((ndo, " %s int %u ext %u",
+                      ipaddr_string(ndo, &egp->egp_sourcenet),
+                      EXTRACT_U_1(egp->egp_intgw),
+                      EXTRACT_U_1(egp->egp_extgw)));
+               if (ndo->ndo_vflag)
+                       egpnrprint(ndo, egp, length);
                break;
 
        case EGPT_ERROR:
                break;
 
        case EGPT_ERROR:
-               printf(" error");
+               ND_PRINT((ndo, " error"));
                if (status <= EGPS_DOWN)
                if (status <= EGPS_DOWN)
-                       printf(" state:%s", egp_status_updown[status]);
+                       ND_PRINT((ndo, " state:%s", egp_status_updown[status]));
                else
                else
-                       printf(" [status %d]", status);
+                       ND_PRINT((ndo, " [status %u]", status));
 
 
-               if (EXTRACT_16BITS(&egp->egp_reason) <= EGPR_UVERSION)
-                       printf(" %s", egp_reasons[EXTRACT_16BITS(&egp->egp_reason)]);
+               if (EXTRACT_BE_U_2(egp->egp_reason) <= EGPR_UVERSION)
+                       ND_PRINT((ndo, " %s", egp_reasons[EXTRACT_BE_U_2(egp->egp_reason)]));
                else
                else
-                       printf(" [reason %d]", EXTRACT_16BITS(&egp->egp_reason));
+                       ND_PRINT((ndo, " [reason %u]", EXTRACT_BE_U_2(egp->egp_reason)));
                break;
 
        default:
                break;
 
        default:
-               printf("[type %d]", type);
+               ND_PRINT((ndo, "[type %u]", type));
                break;
        }
 }
                break;
        }
 }
[mirror] the TCPdump network dissector