gre: add support for MikroTik Ethernet-over-IP hack.

[tcpdump] / print-l2tp.c

diff --git a/print-l2tp.c b/print-l2tp.c
index 184ff752d67255f1696c9b259e343e534fdc9c8f..a5cc378b746a322d4a3b2e7f9459a5ab9ba2082a 100644 (file)
--- a/print-l2tp.c
+++ b/print-l2tp.c
@@ -88,7 +88,7 @@
 #define        L2TP_MSGTYPE_SLI        16 /* Set-Link-Info */
 
 static const struct tok l2tp_msgtype2str[] = {
-       { L2TP_MSGTYPE_SCCRQ,   "SCCRQ" },
+       { L2TP_MSGTYPE_SCCRQ,   "SCCRQ" },
        { L2TP_MSGTYPE_SCCRP,   "SCCRP" },
        { L2TP_MSGTYPE_SCCCN,   "SCCCN" },
        { L2TP_MSGTYPE_STOPCCN, "StopCCN" },
@@ -114,17 +114,17 @@ static const struct tok l2tp_msgtype2str[] = {
 #define L2TP_AVP_FIRM_VER              6  /* Firmware Revision */
 #define L2TP_AVP_HOST_NAME             7  /* Host Name */
 #define L2TP_AVP_VENDOR_NAME           8  /* Vendor Name */
-#define L2TP_AVP_ASSND_TUN_ID          9  /* Assigned Tunnel ID */
+#define L2TP_AVP_ASSND_TUN_ID          9  /* Assigned Tunnel ID */
 #define L2TP_AVP_RECV_WIN_SIZE         10 /* Receive Window Size */
 #define L2TP_AVP_CHALLENGE             11 /* Challenge */
 #define L2TP_AVP_Q931_CC               12 /* Q.931 Cause Code */
 #define L2TP_AVP_CHALLENGE_RESP                13 /* Challenge Response */
-#define L2TP_AVP_ASSND_SESS_ID         14 /* Assigned Session ID */
-#define L2TP_AVP_CALL_SER_NUM          15 /* Call Serial Number */
+#define L2TP_AVP_ASSND_SESS_ID         14 /* Assigned Session ID */
+#define L2TP_AVP_CALL_SER_NUM          15 /* Call Serial Number */
 #define L2TP_AVP_MINIMUM_BPS           16 /* Minimum BPS */
 #define L2TP_AVP_MAXIMUM_BPS           17 /* Maximum BPS */
 #define L2TP_AVP_BEARER_TYPE           18 /* Bearer Type */
-#define L2TP_AVP_FRAMING_TYPE          19 /* Framing Type */
+#define L2TP_AVP_FRAMING_TYPE          19 /* Framing Type */
 #define L2TP_AVP_PACKET_PROC_DELAY     20 /* Packet Processing Delay (OBSOLETE) */
 #define L2TP_AVP_CALLED_NUMBER         21 /* Called Number */
 #define L2TP_AVP_CALLING_NUMBER                22 /* Calling Number */
@@ -144,7 +144,7 @@ static const struct tok l2tp_msgtype2str[] = {
 #define L2TP_AVP_RANDOM_VECTOR         36 /* Random Vector */
 #define L2TP_AVP_PRIVATE_GRP_ID                37 /* Private Group ID */
 #define L2TP_AVP_RX_CONN_SPEED         38 /* (Rx) Connect Speed */
-#define L2TP_AVP_SEQ_REQUIRED          39 /* Sequencing Required */
+#define L2TP_AVP_SEQ_REQUIRED          39 /* Sequencing Required */
 #define L2TP_AVP_PPP_DISCON_CC         46 /* PPP Disconnect Cause Code - RFC 3145 */
 
 static const struct tok l2tp_avp2str[] = {
@@ -577,7 +577,7 @@ l2tp_avp_print(netdissect_options *ndo, const u_char *dat, u_int length)
        len = GET_BE_U_2(dat) & L2TP_AVP_HDR_LEN_MASK;
 
        /* If it is not long enough to contain the header, we'll give up. */
-       ND_LCHECKMSG_U(len, 6, "AVP length");
+       ND_ICHECKMSG_U("AVP length", len, <, 6);
 
        /* If it goes past the end of the remaining length of the packet,
           we'll give up. */
@@ -807,6 +807,8 @@ l2tp_print(netdissect_options *ndo, const u_char *dat, u_int length)
 
        if (flag_o) {   /* Offset Size */
                pad =  GET_BE_U_2(ptr);
+               /* Offset padding octets in packet buffer? */
+               ND_TCHECK_LEN(ptr + 2, pad);
                ptr += (2 + pad);
                cnt += (2 + pad);
        }