From: Chan-yeol Park <chanyeol.park@xxxxxxxxxxx>
Current btmon's btsnoop data link type is BTSNOOP_TYPE_MONITOR:2001.
but some of btsnoop viewer could not handle it because they just
support BTSNOOP_TYPE_HCI(1001).
So they need split option to analyze the btsnoop file captured by
btmon.
---
tools/btsnoop.c | 100 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 98 insertions(+), 2 deletions(-)
diff --git a/tools/btsnoop.c b/tools/btsnoop.c
index 3eb8082..0ea4c65 100644
--- a/tools/btsnoop.c
+++ b/tools/btsnoop.c
@@ -34,6 +34,8 @@
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
+#include <time.h>
+#include <sys/time.h>
#include <getopt.h>
#include <endian.h>
#include <arpa/inet.h>
@@ -272,6 +274,86 @@ close_input:
close(input_fd[i]);
}
+#define BT_SNOOP_TYPE_HCI_PREFIX "btsnoop_type_hci"
+
+static void command_split(const char *input)
+{
+ unsigned char buf[BTSNOOP_MAX_PACKET_SIZE];
+ uint16_t pktlen,opcode;
+ uint32_t type;
+ struct timeval tv;
+ uint16_t index, max_index = 0;
+ char write_file_name[255];
+ struct btsnoop *btsnoop_read_file = NULL;
+ struct btsnoop *btsnoop_write_file[16];
+ time_t t;
+ struct tm tm;
+ unsigned long num_packets = 0;
+
+ btsnoop_read_file = btsnoop_open(input, BTSNOOP_FLAG_PKLG_SUPPORT);
+ if (!btsnoop_read_file)
+ return;
+
+ type = btsnoop_get_type(btsnoop_read_file);
+ if (type != BTSNOOP_TYPE_MONITOR) {
+ fprintf(stderr, "unsupported link data type %u\n", type);
+ btsnoop_unref(btsnoop_read_file);
+ return;
+ }
+
+next_packet:
+ if (!btsnoop_read_hci(btsnoop_read_file, &tv, &index, &opcode, buf,
+ &pktlen))
+ goto close_files;
+
+ if (opcode == 0xffff)
+ goto next_packet;
+
+ switch (opcode) {
+ case BTSNOOP_OPCODE_NEW_INDEX:
+ t = tv.tv_sec;
+ localtime_r(&t, &tm);
+
+ if (max_index < index)
+ max_index = index;
+
+ sprintf(write_file_name, "%s%d_%02d:%02d:%02d.%06lu.log",
+ BT_SNOOP_TYPE_HCI_PREFIX, index, tm.tm_hour, tm.tm_min,
+ tm.tm_sec, tv.tv_usec);
+
+ printf("New Index %d would be saved in %s\n", index,
+ write_file_name);
+
+ btsnoop_write_file[index] = btsnoop_create(write_file_name,
+ BTSNOOP_TYPE_HCI);
+ if (!btsnoop_write_file[index])
+ goto close_files;
+
+ break;
+ case BTSNOOP_OPCODE_DEL_INDEX:
+ printf("Del Index %d\n", index);
+
+ btsnoop_unref(btsnoop_write_file[index]);
+ btsnoop_write_file[index] = NULL;
+ break;
+ default:
+ btsnoop_write_hci(btsnoop_write_file[index], &tv, index,
+ opcode, buf, pktlen);
+ }
+ num_packets++;
+
+ goto next_packet;
+
+close_files:
+ for (index = 0; index < max_index; index++)
+ btsnoop_unref(btsnoop_write_file[index]);
+
+ btsnoop_unref(btsnoop_read_file);
+
+ printf("BT Snoop data link transfer is completed for %lu packets\n",
+ num_packets);
+}
+
static void command_extract_eir(const char *input)
{
struct btsnoop_pkt pkt;
@@ -518,6 +600,7 @@ static void usage(void)
printf("commands:\n"
"\t-m, --merge <output> Merge multiple btsnoop files\n"
"\t-e, --extract <input> Extract data from btsnoop file\n"
+ "\t-s, --split <input> Split btmon file into legacy btsnoop file(s)\n"
"\t-h, --help Show help options\n");
}
@@ -525,12 +608,13 @@ static const struct option main_options[] = {
{ "merge", required_argument, NULL, 'm' },
{ "extract", required_argument, NULL, 'e' },
{ "type", required_argument, NULL, 't' },
+ { "split", required_argument, NULL, 's' },
{ "version", no_argument, NULL, 'v' },
{ "help", no_argument, NULL, 'h' },
{ }
};
-enum { INVALID, MERGE, EXTRACT };
+enum { INVALID, MERGE, EXTRACT, SPLIT };
int main(int argc, char *argv[])
{
@@ -542,7 +626,7 @@ int main(int argc, char *argv[])
for (;;) {
int opt;
- opt = getopt_long(argc, argv, "m:e:t:vh", main_options, NULL);
+ opt = getopt_long(argc, argv, "m:e:s:t:vh", main_options, NULL);
if (opt < 0)
break;
@@ -555,6 +639,9 @@ int main(int argc, char *argv[])
command = EXTRACT;
input_path = optarg;
break;
+ case 's':
+ command = SPLIT;
+ input_path = optarg;
case 't':
type = optarg;
break;
@@ -600,6 +687,15 @@ int main(int argc, char *argv[])
fprintf(stderr, "extract type not supported\n");
break;
+ case SPLIT:
+ if (argc - optind > 0) {
+ fprintf(stderr, "extra arguments not allowed\n");
+ return EXIT_FAILURE;
+ }
+
+ command_split(input_path);
+ break;
+
default:
usage();
return EXIT_FAILURE;
--
2.1.0
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
