]> The Tcpdump Group git mirrors - tcpdump/blobdiff - print-ether.c
Functions in libnetdissect must use ndo_error() function
[tcpdump] / print-ether.c
index c1ebcae9e14f82e7b425bccf9871f3705a78cc50..ddf6a5305260056fd8416fb76a43c114652e6ac8 100644 (file)
@@ -19,7 +19,6 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
-#define NETDISSECT_REWORKED
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
@@ -76,11 +75,14 @@ const struct tok ethertype_values[] = {
     { ETHERTYPE_GRE_ISO,        "GRE-OSI" },
     { ETHERTYPE_CFM_OLD,        "CFM (old)" },
     { ETHERTYPE_CFM,            "CFM" },
+    { ETHERTYPE_IEEE1905_1,     "IEEE1905.1" },
     { ETHERTYPE_LLDP,           "LLDP" },
     { ETHERTYPE_TIPC,           "TIPC"},
     { ETHERTYPE_GEONET_OLD,     "GeoNet (old)"},
     { ETHERTYPE_GEONET,         "GeoNet"},
     { ETHERTYPE_CALM_FAST,      "CALM FAST"},
+    { ETHERTYPE_AOE,            "AoE" },
+    { ETHERTYPE_MEDSA,          "MEDSA" },
     { 0, NULL}
 };
 
@@ -89,30 +91,30 @@ ether_hdr_print(netdissect_options *ndo,
                 const u_char *bp, u_int length)
 {
        register const struct ether_header *ep;
-       u_int16_t ether_type;
+       uint16_t ether_type;
 
        ep = (const struct ether_header *)bp;
 
-       (void)ND_PRINT((ndo, "%s > %s",
-                    etheraddr_string(ESRC(ep)),
-                    etheraddr_string(EDST(ep))));
+       ND_PRINT((ndo, "%s > %s",
+                    etheraddr_string(ndo, ESRC(ep)),
+                    etheraddr_string(ndo, EDST(ep))));
 
        ether_type = EXTRACT_16BITS(&ep->ether_type);
        if (!ndo->ndo_qflag) {
                if (ether_type <= ETHERMTU)
-                         (void)ND_PRINT((ndo, ", 802.3"));
+                         ND_PRINT((ndo, ", 802.3"));
                 else
-                         (void)ND_PRINT((ndo, ", ethertype %s (0x%04x)",
+                         ND_PRINT((ndo, ", ethertype %s (0x%04x)",
                                       tok2str(ethertype_values,"Unknown", ether_type),
                                        ether_type));
         } else {
                 if (ether_type <= ETHERMTU)
-                          (void)ND_PRINT((ndo, ", 802.3"));
+                          ND_PRINT((ndo, ", 802.3"));
                 else
-                          (void)ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ether_type)));
+                          ND_PRINT((ndo, ", %s", tok2str(ethertype_values,"Unknown Ethertype (0x%04x)", ether_type)));
         }
 
-       (void)ND_PRINT((ndo, ", length %u: ", length));
+       ND_PRINT((ndo, ", length %u: ", length));
 }
 
 /*
@@ -121,19 +123,24 @@ ether_hdr_print(netdissect_options *ndo,
  * a pointer to a function that can print header information for that
  * frame's protocol, and an argument to pass to that function.
  */
-void
+u_int
 ether_print(netdissect_options *ndo,
             const u_char *p, u_int length, u_int caplen,
             void (*print_encap_header)(netdissect_options *ndo, const u_char *), const u_char *encap_header_arg)
 {
-       struct ether_header *ep;
+       const struct ether_header *ep;
        u_int orig_length;
        u_short ether_type;
-       u_short extracted_ether_type;
+       u_int hdrlen;
+       int llc_hdrlen;
 
-       if (caplen < ETHER_HDRLEN || length < ETHER_HDRLEN) {
+       if (caplen < ETHER_HDRLEN) {
+               ND_PRINT((ndo, "[|ether]"));
+               return (caplen);
+       }
+       if (length < ETHER_HDRLEN) {
                ND_PRINT((ndo, "[|ether]"));
-               return;
+               return (length);
        }
 
        if (ndo->ndo_eflag) {
@@ -145,8 +152,9 @@ ether_print(netdissect_options *ndo,
 
        length -= ETHER_HDRLEN;
        caplen -= ETHER_HDRLEN;
-       ep = (struct ether_header *)p;
+       ep = (const struct ether_header *)p;
        p += ETHER_HDRLEN;
+       hdrlen = ETHER_HDRLEN;
 
        ether_type = EXTRACT_16BITS(&ep->ether_type);
 
@@ -156,18 +164,14 @@ recurse:
         */
        if (ether_type <= ETHERMTU) {
                /* Try to print the LLC-layer header & higher layers */
-               if (llc_print(ndo, p, length, caplen, ESRC(ep), EDST(ep),
-                   &extracted_ether_type) == 0) {
-                       /* ether_type not known, print raw packet */
-                       if (!ndo->ndo_eflag) {
-                               if (print_encap_header != NULL)
-                                       (*print_encap_header)(ndo, encap_header_arg);
-                               ether_hdr_print(ndo, (u_char *)ep, orig_length);
-                       }
-
+               llc_hdrlen = llc_print(ndo, p, length, caplen, ESRC(ep), EDST(ep));
+               if (llc_hdrlen < 0) {
+                       /* packet type not known, print raw packet */
                        if (!ndo->ndo_suppress_default_print)
-                               ndo->ndo_default_print(ndo, p, caplen);
+                               ND_DEFAULTPRINT(p, caplen);
+                       llc_hdrlen = -llc_hdrlen;
                }
+               hdrlen += llc_hdrlen;
        } else if (ether_type == ETHERTYPE_8021Q  ||
                 ether_type == ETHERTYPE_8021Q9100 ||
                 ether_type == ETHERTYPE_8021Q9200 ||
@@ -176,17 +180,18 @@ recurse:
                 * Print VLAN information, and then go back and process
                 * the enclosed type field.
                 */
-               if (caplen < 4 || length < 4) {
+               if (caplen < 4) {
                        ND_PRINT((ndo, "[|vlan]"));
-                       return;
+                       return (hdrlen + caplen);
+               }
+               if (length < 4) {
+                       ND_PRINT((ndo, "[|vlan]"));
+                       return (hdrlen + length);
                }
                if (ndo->ndo_eflag) {
-                       u_int16_t tag = EXTRACT_16BITS(p);
+                       uint16_t tag = EXTRACT_16BITS(p);
 
-                       ND_PRINT((ndo, "vlan %u, p %u%s, ",
-                           tag & 0xfff,
-                           tag >> 13,
-                           (tag & 0x1000) ? ", CFI" : ""));
+                       ND_PRINT((ndo, "%s, ", ieee8021q_tci_string(tag)));
                }
 
                ether_type = EXTRACT_16BITS(p + 2);
@@ -195,6 +200,7 @@ recurse:
                p += 4;
                length -= 4;
                caplen -= 4;
+               hdrlen += 4;
                goto recurse;
        } else if (ether_type == ETHERTYPE_JUMBO) {
                /*
@@ -207,31 +213,28 @@ recurse:
                 * there's an LLC header and payload.
                 */
                /* Try to print the LLC-layer header & higher layers */
-               if (llc_print(ndo, p, length, caplen, ESRC(ep), EDST(ep),
-                   &extracted_ether_type) == 0) {
-                       /* ether_type not known, print raw packet */
-                       if (!ndo->ndo_eflag) {
-                               if (print_encap_header != NULL)
-                                       (*print_encap_header)(ndo, encap_header_arg);
-                               ether_hdr_print(ndo, (u_char *)ep, orig_length);
-                       }
-
+               llc_hdrlen = llc_print(ndo, p, length, caplen, ESRC(ep), EDST(ep));
+               if (llc_hdrlen < 0) {
+                       /* packet type not known, print raw packet */
                        if (!ndo->ndo_suppress_default_print)
-                               ndo->ndo_default_print(ndo, p, caplen);
+                               ND_DEFAULTPRINT(p, caplen);
+                       llc_hdrlen = -llc_hdrlen;
                }
+               hdrlen += llc_hdrlen;
        } else {
                if (ethertype_print(ndo, ether_type, p, length, caplen) == 0) {
                        /* ether_type not known, print raw packet */
                        if (!ndo->ndo_eflag) {
                                if (print_encap_header != NULL)
                                        (*print_encap_header)(ndo, encap_header_arg);
-                               ether_hdr_print(ndo, (u_char *)ep, orig_length);
+                               ether_hdr_print(ndo, (const u_char *)ep, orig_length);
                        }
 
                        if (!ndo->ndo_suppress_default_print)
-                               ndo->ndo_default_print(ndo, p, caplen);
+                               ND_DEFAULTPRINT(p, caplen);
                }
        }
+       return (hdrlen);
 }
 
 /*
@@ -244,9 +247,7 @@ u_int
 ether_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
                const u_char *p)
 {
-       ether_print(ndo, p, h->len, h->caplen, NULL, NULL);
-
-       return (ETHER_HDRLEN);
+       return (ether_print(ndo, p, h->len, h->caplen, NULL, NULL));
 }
 
 /*
@@ -271,9 +272,7 @@ netanalyzer_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h,
        }
 
        /* Skip the pseudo-header. */
-       ether_print(ndo, p + 4, h->len - 4, h->caplen - 4, NULL, NULL);
-
-       return (4 + ETHER_HDRLEN);
+       return (4 + ether_print(ndo, p + 4, h->len - 4, h->caplen - 4, NULL, NULL));
 }
 
 /*
@@ -301,9 +300,7 @@ netanalyzer_transparent_if_print(netdissect_options *ndo,
        }
 
        /* Skip the pseudo-header, preamble, and SOF. */
-       ether_print(ndo, p + 12, h->len - 12, h->caplen - 12, NULL, NULL);
-
-       return (12 + ETHER_HDRLEN);
+       return (12 + ether_print(ndo, p + 12, h->len - 12, h->caplen - 12, NULL, NULL));
 }
 
 /*
@@ -324,11 +321,9 @@ ethertype_print(netdissect_options *ndo,
                ip_print(ndo, p, length);
                return (1);
 
-#ifdef INET6
        case ETHERTYPE_IPV6:
                ip6_print(ndo, p, length);
                return (1);
-#endif /*INET6*/
 
        case ETHERTYPE_ARP:
        case ETHERTYPE_REVARP:
@@ -336,17 +331,17 @@ ethertype_print(netdissect_options *ndo,
                return (1);
 
        case ETHERTYPE_DN:
-               decnet_print(/*ndo,*/p, length, caplen);
+               decnet_print(ndo, p, length, caplen);
                return (1);
 
        case ETHERTYPE_ATALK:
                if (ndo->ndo_vflag)
-                       fputs("et1 ", stdout);
-               atalk_print(/*ndo,*/p, length);
+                       ND_PRINT((ndo, "et1 "));
+               atalk_print(ndo, p, length);
                return (1);
 
        case ETHERTYPE_AARP:
-               aarp_print(/*ndo,*/p, length);
+               aarp_print(ndo, p, length);
                return (1);
 
        case ETHERTYPE_IPX:
@@ -354,9 +349,9 @@ ethertype_print(netdissect_options *ndo,
                ipx_print(ndo, p, length);
                return (1);
 
-        case ETHERTYPE_ISO:
-                isoclns_print(/*ndo,*/p+1, length-1, length-1);
-                return(1);
+       case ETHERTYPE_ISO:
+               isoclns_print(ndo, p + 1, length - 1, length - 1);
+               return(1);
 
        case ETHERTYPE_PPPOED:
        case ETHERTYPE_PPPOES:
@@ -376,7 +371,7 @@ ethertype_print(netdissect_options *ndo,
        case ETHERTYPE_PPP:
                if (length) {
                        ND_PRINT((ndo, ": "));
-                       ppp_print(/*ndo,*/p, length);
+                       ppp_print(ndo, p, length);
                }
                return (1);
 
@@ -385,16 +380,16 @@ ethertype_print(netdissect_options *ndo,
                return (1);
 
        case ETHERTYPE_SLOW:
-               slow_print(/*ndo,*/p, length);
+               slow_print(ndo, p, length);
                return (1);
 
        case ETHERTYPE_CFM:
        case ETHERTYPE_CFM_OLD:
-               cfm_print(/*ndo,*/p, length);
+               cfm_print(ndo, p, length);
                return (1);
 
        case ETHERTYPE_LLDP:
-               lldp_print(/*ndo,*/p, length);
+               lldp_print(ndo, p, length);
                return (1);
 
         case ETHERTYPE_LOOPBACK:
@@ -423,10 +418,19 @@ ethertype_print(netdissect_options *ndo,
                 calm_fast_print(ndo, p-14, p, length);
                 return (1);
 
+       case ETHERTYPE_AOE:
+               aoe_print(ndo, p, length);
+               return (1);
+
+       case ETHERTYPE_MEDSA:
+               medsa_print(ndo, p, length, caplen);
+               return (1);
+
        case ETHERTYPE_LAT:
        case ETHERTYPE_SCA:
        case ETHERTYPE_MOPRC:
        case ETHERTYPE_MOPDL:
+       case ETHERTYPE_IEEE1905_1:
                /* default_print for now */
        default:
                return (0);