X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/aa944dd81d30c51e2577691c1a2baad1b4b596ef..d08b4abef4de825b3aecbb7c7e7601ac010806fc:/print-openflow-1.0.c

diff --git a/print-openflow-1.0.c b/print-openflow-1.0.c
index f4bd977b..73a9fd88 100644
--- a/print-openflow-1.0.c
+++ b/print-openflow-1.0.c
@@ -8,6 +8,13 @@
  *
  * [OF10] http://www.openflow.org/documents/openflow-spec-v1.0.0.pdf
  *
+ * Decoding of Ethernet frames nested in OFPT_PACKET_IN and OFPT_PACKET_OUT
+ * messages is done only when the verbosity level set by command-line argument
+ * is "-vvv" or higher. In that case the verbosity level is temporarily
+ * decremented by 3 during the nested frame decoding. For example, running
+ * tcpdump with "-vvvv" will do full decoding of OpenFlow and "-v" decoding of
+ * the nested frames.
+ *
  *
  * Copyright (c) 2013 The TCPDUMP project
  * All rights reserved.
@@ -44,10 +51,14 @@
 #include "interface.h"
 #include "extract.h"
 #include "addrtoname.h"
+#include "ether.h"
 #include "ethertype.h"
 #include "ipproto.h"
 #include "openflow.h"
 
+static const char tstr[] = " [|openflow]";
+static const char cstr[] = " (corrupt)";
+
 #define OFPT_HELLO                    0x00
 #define OFPT_ERROR                    0x01
 #define OFPT_ECHO_REQUEST             0x02
@@ -566,7 +577,6 @@ static const struct tok empty_str[] = {
 #define OFP_MAX_PORT_NAME_LEN      16
 #define DESC_STR_LEN              256
 #define SERIAL_NUM_LEN             32
-#define OFP_ETH_ALEN                6
 #define OFP_VLAN_NONE          0xffff
 
 static const char *
@@ -616,7 +626,7 @@ of10_data_print(const u_char *cp, const u_char *ep, const u_int len) {
 	return cp + len;
 
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -633,11 +643,31 @@ of10_vendor_data_print(const u_char *cp, const u_char *ep, const u_int len) {
 	return of10_data_print(cp, ep, len - 4);
 
 corrupt: /* skip the undersized data */
-	printf(" (corrupt)");
+	printf("%s", cstr);
+	TCHECK2(*cp, len);
+	return cp + len;
+trunc:
+	printf("%s", tstr);
+	return ep;
+}
+
+static const u_char *
+of10_packet_data_print(const u_char *cp, const u_char *ep, const u_int len) {
+	if (len == 0)
+		return cp;
+	/* data */
+	printf("\n\t data (%u octets)", len);
+	if (vflag < 3)
+		return cp + len;
 	TCHECK2(*cp, len);
+	vflag -= 3;
+	printf(", frame decoding below\n");
+	ether_print(gndo, cp, len, snapend - cp, NULL, NULL);
+	vflag += 3;
 	return cp + len;
+
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -655,9 +685,9 @@ of10_phy_ports_print(const u_char *cp, const u_char *ep, u_int len) {
 		printf("\n\t  port_no %s", tok2str(ofpp_str, "%u", EXTRACT_16BITS(cp)));
 		cp += 2;
 		/* hw_addr */
-		TCHECK2(*cp, OFP_ETH_ALEN);
+		TCHECK2(*cp, ETHER_ADDR_LEN);
 		printf(", hw_addr %s", etheraddr_string(cp));
-		cp += OFP_ETH_ALEN;
+		cp += ETHER_ADDR_LEN;
 		/* name */
 		TCHECK2(*cp, OFP_MAX_PORT_NAME_LEN);
 		printf(", name '");
@@ -706,11 +736,11 @@ next_port:
 	return cp;
 
 corrupt: /* skip the undersized trailing data */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp0, len0);
 	return cp0 + len0;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -780,11 +810,11 @@ next_property:
 	return cp;
 
 corrupt: /* skip the rest of queue properties */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp0, len0);
 	return cp0 + len0;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -826,11 +856,11 @@ next_queue:
 	return cp;
 
 corrupt: /* skip the rest of queues */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp0, len0);
 	return cp0 + len0;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -855,15 +885,15 @@ of10_match_print(const char *pfx, const u_char *cp, const u_char *ep) {
 		printf("%smatch in_port %s", pfx, tok2str(ofpp_str, "%u", EXTRACT_16BITS(cp)));
 	cp += 2;
 	/* dl_src */
-	TCHECK2(*cp, OFP_ETH_ALEN);
+	TCHECK2(*cp, ETHER_ADDR_LEN);
 	if (! (wildcards & OFPFW_DL_SRC))
 		printf("%smatch dl_src %s", pfx, etheraddr_string(cp));
-	cp += OFP_ETH_ALEN;
+	cp += ETHER_ADDR_LEN;
 	/* dl_dst */
-	TCHECK2(*cp, OFP_ETH_ALEN);
+	TCHECK2(*cp, ETHER_ADDR_LEN);
 	if (! (wildcards & OFPFW_DL_DST))
 		printf("%smatch dl_dst %s", pfx, etheraddr_string(cp));
-	cp += OFP_ETH_ALEN;
+	cp += ETHER_ADDR_LEN;
 	/* dl_vlan */
 	TCHECK2(*cp, 2);
 	if (! (wildcards & OFPFW_DL_VLAN))
@@ -932,7 +962,7 @@ of10_match_print(const char *pfx, const u_char *cp, const u_char *ep) {
 	return cp + 2;
 
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1031,9 +1061,9 @@ of10_actions_print(const char *pfx, const u_char *cp, const u_char *ep,
 		case OFPAT_SET_DL_SRC:
 		case OFPAT_SET_DL_DST:
 			/* dl_addr */
-			TCHECK2(*cp, OFP_ETH_ALEN);
+			TCHECK2(*cp, ETHER_ADDR_LEN);
 			printf(", dl_addr %s", etheraddr_string(cp));
-			cp += OFP_ETH_ALEN;
+			cp += ETHER_ADDR_LEN;
 			/* pad */
 			TCHECK2(*cp, 6);
 			cp += 6;
@@ -1093,11 +1123,11 @@ next_action:
 	return cp;
 
 corrupt: /* skip the rest of actions */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp0, len0);
 	return cp0 + len0;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1133,7 +1163,7 @@ of10_features_reply_print(const u_char *cp, const u_char *ep, const u_int len) {
 	return of10_phy_ports_print(cp, ep, len - OF_SWITCH_FEATURES_LEN);
 
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1189,7 +1219,7 @@ of10_flow_mod_print(const u_char *cp, const u_char *ep, const u_int len) {
 	return of10_actions_print("\n\t ", cp, ep, len - OF_FLOW_MOD_LEN);
 
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1201,9 +1231,9 @@ of10_port_mod_print(const u_char *cp, const u_char *ep) {
 	printf("\n\t port_no %s", tok2str(ofpp_str, "%u", EXTRACT_16BITS(cp)));
 	cp += 2;
 	/* hw_addr */
-	TCHECK2(*cp, OFP_ETH_ALEN);
+	TCHECK2(*cp, ETHER_ADDR_LEN);
 	printf(", hw_addr %s", etheraddr_string(cp));
-	cp += OFP_ETH_ALEN;
+	cp += ETHER_ADDR_LEN;
 	/* config */
 	TCHECK2(*cp, 4);
 	printf("\n\t config 0x%08x", EXTRACT_32BITS(cp));
@@ -1224,7 +1254,7 @@ of10_port_mod_print(const u_char *cp, const u_char *ep) {
 	return cp + 4;
 
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1302,11 +1332,11 @@ of10_stats_request_print(const u_char *cp, const u_char *ep, u_int len) {
 	return cp;
 
 corrupt: /* skip the message body */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp0, len0);
 	return cp0 + len0;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1347,11 +1377,11 @@ of10_desc_stats_reply_print(const u_char *cp, const u_char *ep, const u_int len)
 	return cp + DESC_STR_LEN;
 
 corrupt: /* skip the message body */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp, len);
 	return cp + len;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1426,11 +1456,11 @@ of10_flow_stats_reply_print(const u_char *cp, const u_char *ep, u_int len) {
 	return cp;
 
 corrupt: /* skip the rest of flow statistics entries */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp0, len0);
 	return cp0 + len0;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1457,11 +1487,11 @@ of10_aggregate_stats_reply_print(const u_char *cp, const u_char *ep,
 	return cp + 4;
 
 corrupt: /* skip the message body */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp, len);
 	return cp + len;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1514,11 +1544,11 @@ of10_table_stats_reply_print(const u_char *cp, const u_char *ep, u_int len) {
 	return cp;
 
 corrupt: /* skip the undersized trailing data */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp0, len0);
 	return cp0 + len0;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1597,11 +1627,11 @@ next_port:
 	return cp;
 
 corrupt: /* skip the undersized trailing data */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp0, len0);
 	return cp0 + len0;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1643,11 +1673,11 @@ of10_queue_stats_reply_print(const u_char *cp, const u_char *ep, u_int len) {
 	return cp;
 
 corrupt: /* skip the undersized trailing data */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp0, len0);
 	return cp0 + len0;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1685,7 +1715,7 @@ of10_stats_reply_print(const u_char *cp, const u_char *ep, const u_int len) {
 	return cp0 + len;
 
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1714,14 +1744,14 @@ of10_packet_out_print(const u_char *cp, const u_char *ep, const u_int len) {
 	if (ep == (cp = of10_actions_print("\n\t ", cp, ep, actions_len)))
 		return ep; /* end of snapshot */
 	/* data */
-	return of10_data_print(cp, ep, len - OF_PACKET_OUT_LEN - actions_len);
+	return of10_packet_data_print(cp, ep, len - OF_PACKET_OUT_LEN - actions_len);
 
 corrupt: /* skip the rest of the message body */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 	TCHECK2(*cp0, len0);
 	return cp0 + len0;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1749,10 +1779,10 @@ of10_packet_in_print(const u_char *cp, const u_char *ep, const u_int len) {
 	cp += 1;
 	/* data */
 	/* 2 mock octets count in OF_PACKET_IN_LEN but not in len */
-	return of10_data_print(cp, ep, len - (OF_PACKET_IN_LEN - 2));
+	return of10_packet_data_print(cp, ep, len - (OF_PACKET_IN_LEN - 2));
 
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1804,7 +1834,7 @@ of10_flow_removed_print(const u_char *cp, const u_char *ep) {
 	return cp + 8;
 
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -1835,7 +1865,7 @@ of10_error_print(const u_char *cp, const u_char *ep, const u_int len) {
 	return of10_data_print(cp, ep, len - OF_ERROR_MSG_LEN);
 
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }
 
@@ -2012,11 +2042,11 @@ of10_header_body_print(const u_char *cp, const u_char *ep, const uint8_t type,
 	goto next_message;
 
 corrupt: /* skip the message body */
-	printf(" (corrupt)");
+	printf("%s", cstr);
 next_message:
 	TCHECK2(*cp0, len0 - OF_HEADER_LEN);
 	return cp0 + len0 - OF_HEADER_LEN;
 trunc:
-	printf(" [|openflow]");
+	printf("%s", tstr);
 	return ep;
 }