From: Kriang Lerdsuwanakij

In the attached patch, the K12 wiretap now saves the content of record
after captured packet data. The K12 dissector then could extract them and provide
useful information to properly dissect FP frames (user plane of UTRAN Iub
interface).



svn path=/trunk/; revision=20749

1 files changed, 28 insertions, 2 deletions

diff --git a/wiretap/k12.c b/wiretap/k12.c
index 8e3cd93cc4..0d21fec8a5 100644
--- a/wiretap/k12.c
+++ b/wiretap/k12.c
@@ -120,6 +120,8 @@ struct _k12_t {
 	
 	GHashTable* src_by_id; /* k12_srcdsc_recs by input */
 	GHashTable* src_by_name; /* k12_srcdsc_recs by stack_name */
+
+	Buffer extra_info; /* Buffer to hold per packet extra information */
 };
 
 typedef struct _k12_src_desc_t {
@@ -302,6 +304,7 @@ static gboolean k12_read(wtap *wth, int *err, gchar **err_info _U_, gint64 *data
 	long len;
 	guint32 type;
 	guint64 ts;
+	guint32 extra_len;
 	
 	offset = wth->data_offset;
     
@@ -346,11 +349,19 @@ static gboolean k12_read(wtap *wth, int *err, gchar **err_info _U_, gint64 *data
 #endif
     
 	wth->phdr.len = wth->phdr.caplen = pntohl(buffer + K12_RECORD_FRAME_LEN) & 0x00001FFF;
+	extra_len = len - K12_PACKET_FRAME - wth->phdr.caplen;
 	
 	/* the frame */
 	buffer_assure_space(wth->frame_buffer, wth->phdr.caplen);
 	memcpy(buffer_start_ptr(wth->frame_buffer), buffer + K12_PACKET_FRAME, wth->phdr.caplen);
 	
+	/* extra information need by some protocols */
+	buffer_assure_space(&(wth->capture.k12->extra_info), extra_len);
+	memcpy(buffer_start_ptr(&(wth->capture.k12->extra_info)),
+	       buffer + K12_PACKET_FRAME + wth->phdr.caplen, extra_len);
+	wth->pseudo_header.k12.extra_info = buffer_start_ptr(&(wth->capture.k12->extra_info));
+	wth->pseudo_header.k12.extra_length = extra_len;
+
 	wth->pseudo_header.k12.input = pntohl(buffer + K12_RECORD_INPUT);
     
 #ifdef DEBUG_K12
@@ -403,7 +414,8 @@ static gboolean k12_seek_read(wtap *wth, gint64 seek_off, union wtap_pseudo_head
 	k12_src_desc_t* src_desc;
 	guint8 buffer[0x2000];
 	long len;
-    guint32 input;
+	guint32 extra_len;
+	guint32 input;
     
 #ifdef DEBUG_K12
     k12_dbg(5,"k12_seek_read: ENTER");
@@ -424,6 +436,17 @@ static gboolean k12_seek_read(wtap *wth, gint64 seek_off, union wtap_pseudo_head
 	}
 	
 	memcpy(pd, buffer + K12_PACKET_FRAME, length);
+
+	extra_len = len - K12_PACKET_FRAME - length;
+	buffer_assure_space(&(wth->capture.k12->extra_info), extra_len);
+	memcpy(buffer_start_ptr(&(wth->capture.k12->extra_info)),
+	       buffer + K12_PACKET_FRAME + length, extra_len);
+	wth->pseudo_header.k12.extra_info = buffer_start_ptr(&(wth->capture.k12->extra_info));
+	wth->pseudo_header.k12.extra_length = extra_len;
+	if (pseudo_header) {
+		pseudo_header->k12.extra_info = buffer_start_ptr(&(wth->capture.k12->extra_info));
+		pseudo_header->k12.extra_length = extra_len;
+	}
 	
     input = pntohl(buffer + K12_RECORD_INPUT);
 #ifdef DEBUG_K12
@@ -517,6 +540,8 @@ static k12_t* new_k12_file_data() {
 	fd->num_of_records = 0;
 	fd->src_by_name = g_hash_table_new(g_str_hash,g_str_equal);
 	fd->src_by_id = g_hash_table_new(g_direct_hash,g_direct_equal);
+
+	buffer_init(&(fd->extra_info), 100);
 	
 	return fd;
 }
@@ -539,6 +564,7 @@ static void destroy_k12_file_data(k12_t* fd) {
 	g_hash_table_destroy(fd->src_by_id);
 	g_hash_table_foreach_remove(fd->src_by_name,destroy_srcdsc,NULL);	
 	g_hash_table_destroy(fd->src_by_name);
+	buffer_free(&(fd->extra_info));
 	g_free(fd);
 }
 
@@ -705,7 +731,7 @@ int k12_open(wtap *wth, int *err, gchar **err_info _U_) {
 	wth->subtype_close = k12_close;
 	wth->capture.k12 = file_data;
 	wth->tsprecision = WTAP_FILE_TSPREC_NSEC;	
-	
+
 	return 1;
 }