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Regenerate config files.
[tcpdump] / print-gre.c
diff --git a/print-gre.c b/print-gre.c
index 1ec298f82b545a1aeaf94307cd919f464c0244b1..505752a1b8fad1b0ccd213b1e1ed7f6764707274 100644 (file)
--- a/print-gre.c
+++ b/print-gre.c
@@ -31,30 +31,27 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
+/* \summary: Generic Routing Encapsulation (GRE) printer */
+
 /*
 /*
- * tcpdump filter for GRE - Generic Routing Encapsulation
+ * netdissect printer for GRE - Generic Routing Encapsulation
  * RFC1701 (GRE), RFC1702 (GRE IPv4), and RFC2637 (Enhanced GRE)
  */
 
  * RFC1701 (GRE), RFC1702 (GRE IPv4), and RFC2637 (Enhanced GRE)
  */
 
-#ifndef lint
-static const char rcsid[] =
-    "@(#) $Header: /tcpdump/master/tcpdump/print-gre.c,v 1.22 2003-05-22 16:52:37 hannes Exp $ (LBL)";
-#endif
-
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
 
 
-#include <stdio.h>
 #include <string.h>
 
 #include <string.h>
 
-#include "interface.h"
-#include "addrtoname.h"
+#include "netdissect.h"
+#include "addrtostr.h"
 #include "extract.h"
 #include "extract.h"
+#include "ethertype.h"
 
 
-#include "ip.h"
+static const char tstr[] = "[|gre]";
 
 #define        GRE_CP          0x8000          /* checksum present */
 #define        GRE_RP          0x4000          /* routing present */
 
 #define        GRE_CP          0x8000          /* checksum present */
 #define        GRE_RP          0x4000          /* routing present */
@@ -63,62 +60,74 @@ static const char rcsid[] =
 #define        GRE_sP          0x0800          /* source routing */
 #define        GRE_RECRS       0x0700          /* recursion count */
 #define        GRE_AP          0x0080          /* acknowledgment# present */
 #define        GRE_sP          0x0800          /* source routing */
 #define        GRE_RECRS       0x0700          /* recursion count */
 #define        GRE_AP          0x0080          /* acknowledgment# present */
-#define        GRE_VERS        0x0007          /* protocol version */
 
 
-#define        GREPROTO_IP     0x0800          /* IP */
-#define        GREPROTO_PPP    0x880b          /* PPTP */
-#define        GREPROTO_ISO    0x00fe          /* OSI */
+static const struct tok gre_flag_values[] = {
+    { GRE_CP, "checksum present"},
+    { GRE_RP, "routing present"},
+    { GRE_KP, "key present"},
+    { GRE_SP, "sequence# present"},
+    { GRE_sP, "source routing present"},
+    { GRE_RECRS, "recursion count"},
+    { GRE_AP, "ack present"},
+    { 0, NULL }
+};
+
+#define        GRE_VERS_MASK   0x0007          /* protocol version */
 
 /* source route entry types */
 #define        GRESRE_IP       0x0800          /* IP */
 #define        GRESRE_ASN      0xfffe          /* ASN */
 
 
 /* source route entry types */
 #define        GRESRE_IP       0x0800          /* IP */
 #define        GRESRE_ASN      0xfffe          /* ASN */
 
-void gre_print_0(const u_char *, u_int);
-void gre_print_1(const u_char *, u_int);
-void gre_sre_print(u_int16_t, u_int8_t, u_int8_t, const u_char *, u_int);
-void gre_sre_ip_print(u_int8_t, u_int8_t, const u_char *, u_int);
-void gre_sre_asn_print(u_int8_t, u_int8_t, const u_char *, u_int);
+static void gre_print_0(netdissect_options *, const u_char *, u_int);
+static void gre_print_1(netdissect_options *, const u_char *, u_int);
+static int gre_sre_print(netdissect_options *, uint16_t, uint8_t, uint8_t, const u_char *, u_int);
+static int gre_sre_ip_print(netdissect_options *, uint8_t, uint8_t, const u_char *, u_int);
+static int gre_sre_asn_print(netdissect_options *, uint8_t, uint8_t, const u_char *, u_int);
 
 void
 
 void
-gre_print(const u_char *bp, u_int length)
+gre_print(netdissect_options *ndo, const u_char *bp, u_int length)
 {
        u_int len = length, vers;
 
 {
        u_int len = length, vers;
 
-       if (len < 2) {
-               printf("[|gre]");
-               return;
-       }
-       vers = EXTRACT_16BITS(bp) & 7;
-
-       if (vers == 0)
-               gre_print_0(bp, len);
-       else if (vers == 1)
-               gre_print_1(bp, len);
-       else
-               printf("gre-unknown-version=%u", vers);
-       return;
+       ND_TCHECK2(*bp, 2);
+       if (len < 2)
+               goto trunc;
+       vers = EXTRACT_16BITS(bp) & GRE_VERS_MASK;
+        ND_PRINT((ndo, "GREv%u",vers));
+
+        switch(vers) {
+        case 0:
+            gre_print_0(ndo, bp, len);
+            break;
+        case 1:
+            gre_print_1(ndo, bp, len);
+            break;
+       default:
+            ND_PRINT((ndo, " ERROR: unknown-version"));
+            break;
+        }
+        return;
 
 
+trunc:
+       ND_PRINT((ndo, "%s", tstr));
+       return;
 }
 
 }
 
-void
-gre_print_0(const u_char *bp, u_int length)
+static void
+gre_print_0(netdissect_options *ndo, const u_char *bp, u_int length)
 {
        u_int len = length;
 {
        u_int len = length;
-       u_int16_t flags, prot;
+       uint16_t flags, prot;
 
        flags = EXTRACT_16BITS(bp);
 
        flags = EXTRACT_16BITS(bp);
-       if (vflag) {
-               printf("[%s%s%s%s%s] ",
-                   (flags & GRE_CP) ? "C" : "",
-                   (flags & GRE_RP) ? "R" : "",
-                   (flags & GRE_KP) ? "K" : "",
-                   (flags & GRE_SP) ? "S" : "",
-                   (flags & GRE_sP) ? "s" : "");
-       }
+        if (ndo->ndo_vflag)
+            ND_PRINT((ndo, ", Flags [%s]",
+                   bittok2str(gre_flag_values,"none",flags)));
 
        len -= 2;
        bp += 2;
 
 
        len -= 2;
        bp += 2;
 
+       ND_TCHECK2(*bp, 2);
        if (len < 2)
                goto trunc;
        prot = EXTRACT_16BITS(bp);
        if (len < 2)
                goto trunc;
        prot = EXTRACT_16BITS(bp);
@@ -126,42 +135,47 @@ gre_print_0(const u_char *bp, u_int length)
        bp += 2;
 
        if ((flags & GRE_CP) | (flags & GRE_RP)) {
        bp += 2;
 
        if ((flags & GRE_CP) | (flags & GRE_RP)) {
+               ND_TCHECK2(*bp, 2);
                if (len < 2)
                        goto trunc;
                if (len < 2)
                        goto trunc;
-               if (vflag)
-                       printf("sum 0x%x ", EXTRACT_16BITS(bp));
+               if (ndo->ndo_vflag)
+                       ND_PRINT((ndo, ", sum 0x%x", EXTRACT_16BITS(bp)));
                bp += 2;
                len -= 2;
 
                bp += 2;
                len -= 2;
 
+               ND_TCHECK2(*bp, 2);
                if (len < 2)
                        goto trunc;
                if (len < 2)
                        goto trunc;
-               printf("off 0x%x ", EXTRACT_16BITS(bp));
+               ND_PRINT((ndo, ", off 0x%x", EXTRACT_16BITS(bp)));
                bp += 2;
                len -= 2;
        }
 
        if (flags & GRE_KP) {
                bp += 2;
                len -= 2;
        }
 
        if (flags & GRE_KP) {
+               ND_TCHECK2(*bp, 4);
                if (len < 4)
                        goto trunc;
                if (len < 4)
                        goto trunc;
-               printf("key=0x%x ", EXTRACT_32BITS(bp));
+               ND_PRINT((ndo, ", key=0x%x", EXTRACT_32BITS(bp)));
                bp += 4;
                len -= 4;
        }
 
        if (flags & GRE_SP) {
                bp += 4;
                len -= 4;
        }
 
        if (flags & GRE_SP) {
+               ND_TCHECK2(*bp, 4);
                if (len < 4)
                        goto trunc;
                if (len < 4)
                        goto trunc;
-               printf("seq %u ", EXTRACT_32BITS(bp));
+               ND_PRINT((ndo, ", seq %u", EXTRACT_32BITS(bp)));
                bp += 4;
                len -= 4;
        }
 
        if (flags & GRE_RP) {
                for (;;) {
                bp += 4;
                len -= 4;
        }
 
        if (flags & GRE_RP) {
                for (;;) {
-                       u_int16_t af;
-                       u_int8_t sreoff;
-                       u_int8_t srelen;
+                       uint16_t af;
+                       uint8_t sreoff;
+                       uint8_t srelen;
 
 
+                       ND_TCHECK2(*bp, 4);
                        if (len < 4)
                                goto trunc;
                        af = EXTRACT_16BITS(bp);
                        if (len < 4)
                                goto trunc;
                        af = EXTRACT_16BITS(bp);
@@ -173,7 +187,8 @@ gre_print_0(const u_char *bp, u_int length)
                        if (af == 0 && srelen == 0)
                                break;
 
                        if (af == 0 && srelen == 0)
                                break;
 
-                       gre_sre_print(af, sreoff, srelen, bp, len);
+                       if (!gre_sre_print(ndo, af, sreoff, srelen, bp, len))
+                               goto trunc;
 
                        if (len < srelen)
                                goto trunc;
 
                        if (len < srelen)
                                goto trunc;
@@ -182,192 +197,226 @@ gre_print_0(const u_char *bp, u_int length)
                }
        }
 
                }
        }
 
+        if (ndo->ndo_eflag)
+            ND_PRINT((ndo, ", proto %s (0x%04x)",
+                   tok2str(ethertype_values,"unknown",prot),
+                   prot));
+
+        ND_PRINT((ndo, ", length %u",length));
+
+        if (ndo->ndo_vflag < 1)
+            ND_PRINT((ndo, ": ")); /* put in a colon as protocol demarc */
+        else
+            ND_PRINT((ndo, "\n\t")); /* if verbose go multiline */
+
        switch (prot) {
        switch (prot) {
-       case GREPROTO_IP:
-               ip_print(bp, len);
+       case ETHERTYPE_IP:
+               ip_print(ndo, bp, len);
+               break;
+       case ETHERTYPE_IPV6:
+               ip6_print(ndo, bp, len);
+               break;
+       case ETHERTYPE_MPLS:
+               mpls_print(ndo, bp, len);
+               break;
+       case ETHERTYPE_IPX:
+               ipx_print(ndo, bp, len);
+               break;
+       case ETHERTYPE_ATALK:
+               atalk_print(ndo, bp, len);
                break;
                break;
-       case GREPROTO_ISO:
-               isoclns_print(bp, len, len);
+       case ETHERTYPE_GRE_ISO:
+               isoclns_print(ndo, bp, len, ndo->ndo_snapend - bp);
+               break;
+       case ETHERTYPE_TEB:
+               ether_print(ndo, bp, len, ndo->ndo_snapend - bp, NULL, NULL);
                break;
        default:
                break;
        default:
-               printf("gre-proto-0x%x", prot);
+               ND_PRINT((ndo, "gre-proto-0x%x", prot));
        }
        return;
 
 trunc:
        }
        return;
 
 trunc:
-       printf("[|gre]");
+       ND_PRINT((ndo, "%s", tstr));
 }
 
 }
 
-void
-gre_print_1(const u_char *bp, u_int length)
+static void
+gre_print_1(netdissect_options *ndo, const u_char *bp, u_int length)
 {
        u_int len = length;
 {
        u_int len = length;
-       u_int16_t flags, prot;
+       uint16_t flags, prot;
 
        flags = EXTRACT_16BITS(bp);
        len -= 2;
        bp += 2;
 
 
        flags = EXTRACT_16BITS(bp);
        len -= 2;
        bp += 2;
 
-       if (vflag) {
-               printf("[%s%s%s%s%s%s] ",
-                   (flags & GRE_CP) ? "C" : "",
-                   (flags & GRE_RP) ? "R" : "",
-                   (flags & GRE_KP) ? "K" : "",
-                   (flags & GRE_SP) ? "S" : "",
-                   (flags & GRE_sP) ? "s" : "",
-                   (flags & GRE_AP) ? "A" : "");
-       }
+       if (ndo->ndo_vflag)
+            ND_PRINT((ndo, ", Flags [%s]",
+                   bittok2str(gre_flag_values,"none",flags)));
 
 
+       ND_TCHECK2(*bp, 2);
        if (len < 2)
                goto trunc;
        prot = EXTRACT_16BITS(bp);
        len -= 2;
        bp += 2;
 
        if (len < 2)
                goto trunc;
        prot = EXTRACT_16BITS(bp);
        len -= 2;
        bp += 2;
 
-       if (flags & GRE_CP) {
-               printf("cpset!");
-               return;
-       }
-       if (flags & GRE_RP) {
-               printf("rpset!");
-               return;
-       }
-       if ((flags & GRE_KP) == 0) {
-               printf("kpunset!");
-               return;
-       }
-       if (flags & GRE_sP) {
-               printf("spset!");
-               return;
-       }
 
        if (flags & GRE_KP) {
 
        if (flags & GRE_KP) {
-               u_int32_t k;
+               uint32_t k;
 
 
+               ND_TCHECK2(*bp, 4);
                if (len < 4)
                        goto trunc;
                k = EXTRACT_32BITS(bp);
                if (len < 4)
                        goto trunc;
                k = EXTRACT_32BITS(bp);
-               printf("call %d ", k & 0xffff);
+               ND_PRINT((ndo, ", call %d", k & 0xffff));
                len -= 4;
                bp += 4;
        }
 
        if (flags & GRE_SP) {
                len -= 4;
                bp += 4;
        }
 
        if (flags & GRE_SP) {
+               ND_TCHECK2(*bp, 4);
                if (len < 4)
                        goto trunc;
                if (len < 4)
                        goto trunc;
-               printf("seq %u ", EXTRACT_32BITS(bp));
+               ND_PRINT((ndo, ", seq %u", EXTRACT_32BITS(bp)));
                bp += 4;
                len -= 4;
        }
 
        if (flags & GRE_AP) {
                bp += 4;
                len -= 4;
        }
 
        if (flags & GRE_AP) {
+               ND_TCHECK2(*bp, 4);
                if (len < 4)
                        goto trunc;
                if (len < 4)
                        goto trunc;
-               printf("ack %u ", EXTRACT_32BITS(bp));
+               ND_PRINT((ndo, ", ack %u", EXTRACT_32BITS(bp)));
                bp += 4;
                len -= 4;
        }
 
                bp += 4;
                len -= 4;
        }
 
-       if ((flags & GRE_SP) == 0) {
-               printf("no-payload");
-               return;
-       }
+       if ((flags & GRE_SP) == 0)
+               ND_PRINT((ndo, ", no-payload"));
+
+        if (ndo->ndo_eflag)
+            ND_PRINT((ndo, ", proto %s (0x%04x)",
+                   tok2str(ethertype_values,"unknown",prot),
+                   prot));
+
+        ND_PRINT((ndo, ", length %u",length));
+
+        if ((flags & GRE_SP) == 0)
+            return;
+
+        if (ndo->ndo_vflag < 1)
+            ND_PRINT((ndo, ": ")); /* put in a colon as protocol demarc */
+        else
+            ND_PRINT((ndo, "\n\t")); /* if verbose go multiline */
 
        switch (prot) {
 
        switch (prot) {
-       case GREPROTO_PPP:
-               printf("gre-ppp-payload");
+       case ETHERTYPE_PPP:
+               ppp_print(ndo, bp, len);
                break;
        default:
                break;
        default:
-               printf("gre-proto-0x%x", prot);
+               ND_PRINT((ndo, "gre-proto-0x%x", prot));
                break;
        }
        return;
 
 trunc:
                break;
        }
        return;
 
 trunc:
-       printf("[|gre]");
+       ND_PRINT((ndo, "%s", tstr));
 }
 
 }
 
-void
-gre_sre_print(u_int16_t af, u_int8_t sreoff, u_int8_t srelen,
-    const u_char *bp, u_int len)
+static int
+gre_sre_print(netdissect_options *ndo, uint16_t af, uint8_t sreoff,
+    uint8_t srelen, const u_char *bp, u_int len)
 {
 {
+       int ret;
+
        switch (af) {
        case GRESRE_IP:
        switch (af) {
        case GRESRE_IP:
-               printf("(rtaf=ip");
-               gre_sre_ip_print(sreoff, srelen, bp, len);
-               printf(") ");
+               ND_PRINT((ndo, ", (rtaf=ip"));
+               ret = gre_sre_ip_print(ndo, sreoff, srelen, bp, len);
+               ND_PRINT((ndo, ")"));
                break;
        case GRESRE_ASN:
                break;
        case GRESRE_ASN:
-               printf("(rtaf=asn");
-               gre_sre_asn_print(sreoff, srelen, bp, len);
-               printf(") ");
+               ND_PRINT((ndo, ", (rtaf=asn"));
+               ret = gre_sre_asn_print(ndo, sreoff, srelen, bp, len);
+               ND_PRINT((ndo, ")"));
                break;
        default:
                break;
        default:
-               printf("(rtaf=0x%x) ", af);
+               ND_PRINT((ndo, ", (rtaf=0x%x)", af));
+               ret = 1;
        }
        }
+       return (ret);
 }
 }
-void
-gre_sre_ip_print(u_int8_t sreoff, u_int8_t srelen, const u_char *bp, u_int len)
+
+static int
+gre_sre_ip_print(netdissect_options *ndo, uint8_t sreoff, uint8_t srelen,
+                 const u_char *bp, u_int len)
 {
 {
-       struct in_addr a;
        const u_char *up = bp;
        const u_char *up = bp;
+       char buf[INET_ADDRSTRLEN];
 
        if (sreoff & 3) {
 
        if (sreoff & 3) {
-               printf(" badoffset=%u", sreoff);
-               return;
+               ND_PRINT((ndo, ", badoffset=%u", sreoff));
+               return (1);
        }
        if (srelen & 3) {
        }
        if (srelen & 3) {
-               printf(" badlength=%u", srelen);
-               return;
+               ND_PRINT((ndo, ", badlength=%u", srelen));
+               return (1);
        }
        if (sreoff >= srelen) {
        }
        if (sreoff >= srelen) {
-               printf(" badoff/len=%u/%u", sreoff, srelen);
-               return;
+               ND_PRINT((ndo, ", badoff/len=%u/%u", sreoff, srelen));
+               return (1);
        }
 
        }
 
-       for (;;) {
-               if (len < 4 || srelen == 0)
-                       return;
+       while (srelen != 0) {
+               if (!ND_TTEST2(*bp, 4))
+                       return (0);
+               if (len < 4)
+                       return (0);
 
 
-               memcpy(&a, bp, sizeof(a));
-               printf(" %s%s",
-                   ((bp - up) == sreoff) ? "*" : "",
-                   inet_ntoa(a));
+               addrtostr(bp, buf, sizeof(buf));
+               ND_PRINT((ndo, " %s%s",
+                   ((bp - up) == sreoff) ? "*" : "", buf));
 
                bp += 4;
                len -= 4;
                srelen -= 4;
        }
 
                bp += 4;
                len -= 4;
                srelen -= 4;
        }
+       return (1);
 }
 
 }
 
-void
-gre_sre_asn_print(u_int8_t sreoff, u_int8_t srelen, const u_char *bp, u_int len)
+static int
+gre_sre_asn_print(netdissect_options *ndo, uint8_t sreoff, uint8_t srelen,
+                  const u_char *bp, u_int len)
 {
        const u_char *up = bp;
 
        if (sreoff & 1) {
 {
        const u_char *up = bp;
 
        if (sreoff & 1) {
-               printf(" badoffset=%u", sreoff);
-               return;
+               ND_PRINT((ndo, ", badoffset=%u", sreoff));
+               return (1);
        }
        if (srelen & 1) {
        }
        if (srelen & 1) {
-               printf(" badlength=%u", srelen);
-               return;
+               ND_PRINT((ndo, ", badlength=%u", srelen));
+               return (1);
        }
        if (sreoff >= srelen) {
        }
        if (sreoff >= srelen) {
-               printf(" badoff/len=%u/%u", sreoff, srelen);
-               return;
+               ND_PRINT((ndo, ", badoff/len=%u/%u", sreoff, srelen));
+               return (1);
        }
 
        }
 
-       for (;;) {
-               if (len < 2 || srelen == 0)
-                       return;
+       while (srelen != 0) {
+               if (!ND_TTEST2(*bp, 2))
+                       return (0);
+               if (len < 2)
+                       return (0);
 
 
-               printf(" %s%x",
+               ND_PRINT((ndo, " %s%x",
                    ((bp - up) == sreoff) ? "*" : "",
                    ((bp - up) == sreoff) ? "*" : "",
-                   EXTRACT_16BITS(bp));
+                   EXTRACT_16BITS(bp)));
 
                bp += 2;
                len -= 2;
                srelen -= 2;
        }
 
                bp += 2;
                len -= 2;
                srelen -= 2;
        }
+       return (1);
 }
 }
[mirror] the TCPdump network dissector