Make pcap file format an option

Valid options are raw and eth. Default is raw as it was before last commit.
fixes #290

daemon/main.c

@@ -88,6 +88,7 @@ static int delete_delay = 30;
 static int graphite_interval = 0;
 static char *spooldir;
 static char *rec_method = "pcap";
+static char *rec_format = "raw";
 
 static void sighandler(gpointer x) {
 	sigset_t ss;
@@ -329,6 +330,7 @@ static void options(int *argc, char ***argv) {
 		{ "homer-id",	0,  0, G_OPTION_ARG_STRING,	&homer_id,	"'Capture ID' to use within the HEP protocol", "INT"	},
 		{ "recording-dir", 0, 0, G_OPTION_ARG_STRING,	&spooldir,	"Directory for storing pcap and metadata files", "FILE"	},
 		{ "recording-method",0, 0, G_OPTION_ARG_STRING,	&rec_method,	"Strategy for call recording",		"pcap|proc"	},
+		{ "recording-format",0, 0, G_OPTION_ARG_STRING,	&rec_format,	"File format for stored pcap files",	"raw|eth"	},
 		{ NULL, }
 	};
 
@@ -529,7 +531,7 @@ static void init_everything() {
 	struct timespec ts;
 
 	log_init();
-	recording_fs_init(spooldir, rec_method);
+	recording_fs_init(spooldir, rec_method, rec_format);
 	clock_gettime(CLOCK_REALTIME, &ts);
 	srandom(ts.tv_sec ^ ts.tv_nsec);
 	SSL_library_init();

daemon/recording.c

@@ -82,7 +82,7 @@ static const struct recording_method methods[] = {
 static char *spooldir = NULL;
 
 const struct recording_method *selected_recording_method;
-
+int rec_format;
 
 
 
@@ -90,7 +90,7 @@ const struct recording_method *selected_recording_method;
  * Initialize RTP Engine filesystem settings and structure.
  * Check for or create the RTP Engine spool directory.
  */
-void recording_fs_init(const char *spoolpath, const char *method_str) {
+void recording_fs_init(const char *spoolpath, const char *method_str, const char *format_str) {
 	int i;
 
 	// Whether or not to fail if the spool directory does not exist.
@@ -108,6 +108,15 @@ void recording_fs_init(const char *spoolpath, const char *method_str) {
 	return;
 
 found:
+	if(!strcmp("raw", format_str))
+		rec_format = 0;
+	else if(!strcmp("eth", format_str))
+		rec_format = 1;
+	else {
+		ilog(LOG_ERR, "Invalid value for recording format \"%s\".", format_str);
+		exit(-1);
+	}
+
 	spooldir = strdup(spoolpath);
 
 	int path_len = strlen(spooldir);
@@ -399,7 +408,10 @@ static char *recording_setup_file(struct recording *recording) {
 	recording_path = file_path_str(recording->meta_prefix, "/pcaps/", ".pcap");
 	recording->pcap.recording_path = recording_path;
 
-	recording->pcap.recording_pd = pcap_open_dead(DLT_EN10MB, 65535);
+	if(rec_format == 1)
+		recording->pcap.recording_pd = pcap_open_dead(DLT_EN10MB, 65535);
+	else
+		recording->pcap.recording_pd = pcap_open_dead(DLT_RAW, 65535);
 	recording->pcap.recording_pdumper = pcap_dump_open(recording->pcap.recording_pd, recording_path);
 	if (recording->pcap.recording_pdumper == NULL) {
 		pcap_close(recording->pcap.recording_pd);
@@ -450,11 +462,17 @@ static void stream_pcap_dump(pcap_dumper_t *pdumper, struct packet_stream *strea
 	if (!pdumper)
 		return;
 
-	unsigned char pkt[s->len + MAX_PACKET_HEADER_LEN + 14];
-	unsigned int pkt_len = fake_ip_header(pkt + 14, stream, s);
-	pkt_len += 14;
-	memset(pkt, 0, 14);
-	pkt[12] = 0x08;
+	int ether_len = 0;
+	if(rec_format == 1)
+		ether_len = 14;
+
+	unsigned char pkt[s->len + MAX_PACKET_HEADER_LEN + ether_len];
+	unsigned int pkt_len = fake_ip_header(pkt + ether_len, stream, s);
+	if(rec_format == 1) {
+		pkt_len += 14;
+		memset(pkt, 0, 14);
+		pkt[12] = 0x08;
+	}
 
 	// Set up PCAP packet header
 	struct pcap_pkthdr header;

daemon/recording.h

@@ -100,7 +100,7 @@ extern const struct recording_method *selected_recording_method;
  * Initialize RTP Engine filesystem settings and structure.
  * Check for or create the RTP Engine spool directory.
  */
-void recording_fs_init(const char *spooldir, const char *method);
+void recording_fs_init(const char *spooldir, const char *method, const char *format);
 
 
 /**