X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/bd00116d80c18b782f4cb15dfc90cd5bf993d4f5..1a04b92e365f5ed01ca38619b41bcc4fc9cbd63c:/print-atm.c

diff --git a/print-atm.c b/print-atm.c
index d2f18f7a..ed29c6d5 100644
--- a/print-atm.c
+++ b/print-atm.c
@@ -19,13 +19,15 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  */
 
+/* \summary: Asynchronous Transfer Mode (ATM) printer */
+
 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
 
-#include "interface.h"
+#include "netdissect.h"
 #include "extract.h"
 #include "addrtoname.h"
 #include "atm.h"
@@ -257,10 +259,10 @@ atm_if_print(netdissect_options *ndo,
 	}
 
         /* Cisco Style NLPID ? */
-        if (*p == LLC_UI) {
+        if (EXTRACT_U_1(p) == LLC_UI) {
             if (ndo->ndo_eflag)
                 ND_PRINT((ndo, "CNLPID "));
-            isoclns_print(ndo, p + 1, length - 1, caplen - 1);
+            isoclns_print(ndo, p + 1, length - 1);
             return hdrlen;
         }
 
@@ -280,7 +282,7 @@ atm_if_print(netdissect_options *ndo,
 	 * packet nor an RFC 2684 routed NLPID-formatted PDU nor
 	 * an 802.2-but-no-SNAP IP packet.
 	 */
-	llchdr = EXTRACT_24BITS(p);
+	llchdr = EXTRACT_BE_U_3(p);
 	if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
 	    llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
 	    llchdr != LLC_UI_HDR(LLCSAP_IP)) {
@@ -306,10 +308,10 @@ atm_if_print(netdissect_options *ndo,
 		}
 		if (ndo->ndo_eflag)
 			ND_PRINT((ndo, "%08x%08x %08x%08x ",
-			       EXTRACT_32BITS(p),
-			       EXTRACT_32BITS(p+4),
-			       EXTRACT_32BITS(p+8),
-			       EXTRACT_32BITS(p+12)));
+			       EXTRACT_BE_U_4(p),
+			       EXTRACT_BE_U_4(p + 4),
+			       EXTRACT_BE_U_4(p + 8),
+			       EXTRACT_BE_U_4(p + 12)));
 		p += 20;
 		length -= 20;
 		caplen -= 20;
@@ -343,26 +345,20 @@ static const struct tok msgtype2str[] = {
 
 static void
 sig_print(netdissect_options *ndo,
-          const u_char *p, int caplen)
+          const u_char *p)
 {
 	uint32_t call_ref;
 
-	if (caplen < PROTO_POS) {
-		ND_PRINT((ndo, "%s", tstr));
-		return;
-	}
-	if (p[PROTO_POS] == Q2931) {
+	ND_TCHECK_1(p + PROTO_POS);
+	if (EXTRACT_U_1(p + PROTO_POS) == Q2931) {
 		/*
 		 * protocol:Q.2931 for User to Network Interface
 		 * (UNI 3.1) signalling
 		 */
 		ND_PRINT((ndo, "Q.2931"));
-		if (caplen < MSG_TYPE_POS) {
-			ND_PRINT((ndo, " %s", tstr));
-			return;
-		}
+		ND_TCHECK_1(p + MSG_TYPE_POS);
 		ND_PRINT((ndo, ":%s ",
-		    tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS])));
+		    tok2str(msgtype2str, "msgtype#%d", EXTRACT_U_1(p + MSG_TYPE_POS))));
 
 		/*
 		 * The call reference comes before the message type,
@@ -370,12 +366,16 @@ sig_print(netdissect_options *ndo,
 		 * do from the caplen test above, we also know we have
 		 * the call reference.
 		 */
-		call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);
+		call_ref = EXTRACT_BE_U_3(p + CALL_REF_POS);
 		ND_PRINT((ndo, "CALL_REF:0x%06x", call_ref));
 	} else {
-		/* SCCOP with some unknown protocol atop it */
-		ND_PRINT((ndo, "SSCOP, proto %d ", p[PROTO_POS]));
+		/* SSCOP with some unknown protocol atop it */
+		ND_PRINT((ndo, "SSCOP, proto %d ", EXTRACT_U_1(p + PROTO_POS)));
 	}
+	return;
+
+trunc:
+	ND_PRINT((ndo, " %s", tstr));
 }
 
 /*
@@ -393,7 +393,7 @@ atm_print(netdissect_options *ndo,
 		switch (vci) {
 
 		case VCI_PPC:
-			sig_print(ndo, p, caplen);
+			sig_print(ndo, p);
 			return;
 
 		case VCI_BCC:
@@ -446,7 +446,7 @@ struct oam_fm_ais_rdi_t {
     uint8_t unused[28];
 };
 
-int
+void
 oam_print (netdissect_options *ndo,
            const u_char *p, u_int length, u_int hec)
 {
@@ -460,9 +460,10 @@ oam_print (netdissect_options *ndo,
     } oam_ptr;
 
 
-    cell_header = EXTRACT_32BITS(p+hec);
-    cell_type = ((*(p+ATM_HDR_LEN_NOHEC+hec))>>4) & 0x0f;
-    func_type = (*(p+ATM_HDR_LEN_NOHEC+hec)) & 0x0f;
+    ND_TCHECK_1(p + ATM_HDR_LEN_NOHEC + hec);
+    cell_header = EXTRACT_BE_U_4(p + hec);
+    cell_type = (EXTRACT_U_1((p + ATM_HDR_LEN_NOHEC + hec)) >> 4) & 0x0f;
+    func_type = EXTRACT_U_1((p + ATM_HDR_LEN_NOHEC + hec)) & 0x0f;
 
     vpi = (cell_header>>20)&0xff;
     vci = (cell_header>>4)&0xffff;
@@ -476,7 +477,7 @@ oam_print (netdissect_options *ndo,
            clp, length));
 
     if (!ndo->ndo_vflag) {
-        return 1;
+        return;
     }
 
     ND_PRINT((ndo, "\n\tcell-type %s (%u)",
@@ -495,21 +496,22 @@ oam_print (netdissect_options *ndo,
     switch (cell_type << 4 | func_type) {
     case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_LOOPBACK):
         oam_ptr.oam_fm_loopback = (const struct oam_fm_loopback_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
+        ND_TCHECK(*oam_ptr.oam_fm_loopback);
         ND_PRINT((ndo, "\n\tLoopback-Indicator %s, Correlation-Tag 0x%08x",
                tok2str(oam_fm_loopback_indicator_values,
                        "Unknown",
                        oam_ptr.oam_fm_loopback->loopback_indicator & OAM_FM_LOOPBACK_INDICATOR_MASK),
-               EXTRACT_32BITS(&oam_ptr.oam_fm_loopback->correlation_tag)));
+               EXTRACT_BE_U_4(&oam_ptr.oam_fm_loopback->correlation_tag)));
         ND_PRINT((ndo, "\n\tLocation-ID "));
         for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->loopback_id); idx++) {
             if (idx % 2) {
-                ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->loopback_id[idx])));
+                ND_PRINT((ndo, "%04x ", EXTRACT_BE_U_2(&oam_ptr.oam_fm_loopback->loopback_id[idx])));
             }
         }
         ND_PRINT((ndo, "\n\tSource-ID   "));
         for (idx = 0; idx < sizeof(oam_ptr.oam_fm_loopback->source_id); idx++) {
             if (idx % 2) {
-                ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_loopback->source_id[idx])));
+                ND_PRINT((ndo, "%04x ", EXTRACT_BE_U_2(&oam_ptr.oam_fm_loopback->source_id[idx])));
             }
         }
         break;
@@ -517,11 +519,12 @@ oam_print (netdissect_options *ndo,
     case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_AIS):
     case (OAM_CELLTYPE_FM << 4 | OAM_FM_FUNCTYPE_RDI):
         oam_ptr.oam_fm_ais_rdi = (const struct oam_fm_ais_rdi_t *)(p + OAM_CELLTYPE_FUNCTYPE_LEN);
+        ND_TCHECK(*oam_ptr.oam_fm_ais_rdi);
         ND_PRINT((ndo, "\n\tFailure-type 0x%02x", oam_ptr.oam_fm_ais_rdi->failure_type));
         ND_PRINT((ndo, "\n\tLocation-ID "));
         for (idx = 0; idx < sizeof(oam_ptr.oam_fm_ais_rdi->failure_location); idx++) {
             if (idx % 2) {
-                ND_PRINT((ndo, "%04x ", EXTRACT_16BITS(&oam_ptr.oam_fm_ais_rdi->failure_location[idx])));
+                ND_PRINT((ndo, "%04x ", EXTRACT_BE_U_2(&oam_ptr.oam_fm_ais_rdi->failure_location[idx])));
             }
         }
         break;
@@ -535,7 +538,8 @@ oam_print (netdissect_options *ndo,
     }
 
     /* crc10 checksum verification */
-    cksum = EXTRACT_16BITS(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN)
+    ND_TCHECK_2(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN);
+    cksum = EXTRACT_BE_U_2(p + OAM_CELLTYPE_FUNCTYPE_LEN + OAM_FUNCTION_SPECIFIC_LEN)
         & OAM_CRC10_MASK;
     cksum_shouldbe = verify_crc10_cksum(0, p, OAM_PAYLOAD_LEN);
 
@@ -543,5 +547,9 @@ oam_print (netdissect_options *ndo,
            cksum,
            cksum_shouldbe == 0 ? "" : "in"));
 
-    return 1;
+    return;
+
+trunc:
+    ND_PRINT((ndo, "[|oam]"));
+    return;
 }