This patch adds support for connection establishment with different security
levels. Currently, only LE connections are supported.
---
tools/btgatt-client.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 79 insertions(+), 1 deletion(-)
diff --git a/tools/btgatt-client.c b/tools/btgatt-client.c
index a5ce70b..30e8e50 100644
--- a/tools/btgatt-client.c
+++ b/tools/btgatt-client.c
@@ -28,15 +28,20 @@
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
+#include <unistd.h>
#include <getopt.h>
#include <limits.h>
+#include <errno.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>
+#include <bluetooth/l2cap.h>
#include "monitor/mainloop.h"
+#define ATT_CID 4
+
static bool verbose = false;
static void print_prompt(void)
@@ -65,6 +70,74 @@ static void prompt_read_cb(int fd, uint32_t events, void *user_data)
free(line);
}
+static int l2cap_le_att_connect(bdaddr_t *src, bdaddr_t *dst, uint8_t dst_type,
+ int sec)
+{
+ int sock;
+ struct sockaddr_l2 srcaddr, dstaddr;
+ struct bt_security btsec;
+
+ if (verbose) {
+ char srcaddr_str[18], dstaddr_str[18];
+
+ ba2str(src, srcaddr_str);
+ ba2str(dst, dstaddr_str);
+
+ printf("Opening L2CAP LE connection on ATT channel:\n"
+ "\t src: %s\n\tdest: %s\n",
+ srcaddr_str, dstaddr_str);
+ }
+
+ sock = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_L2CAP);
+ if (sock < 0) {
+ perror("Failed to create L2CAP socket");
+ return -1;
+ }
+
+ /* Set up source address */
+ memset(&srcaddr, 0, sizeof(srcaddr));
+ srcaddr.l2_family = AF_BLUETOOTH;
+ srcaddr.l2_cid = htobs(ATT_CID);
+ srcaddr.l2_bdaddr_type = 0;
+ bacpy(&srcaddr.l2_bdaddr, src);
+
+ if (bind(sock, (struct sockaddr *)&srcaddr, sizeof(srcaddr)) < 0) {
+ perror("Failed to bind L2CAP socket");
+ close(sock);
+ return -1;
+ }
+
+ /* Set the security level */
+ memset(&btsec, 0, sizeof(btsec));
+ btsec.level = sec;
+ if (setsockopt(sock, SOL_BLUETOOTH, BT_SECURITY, &btsec,
+ sizeof(btsec)) != 0) {
+ fprintf(stderr, "Failed to set L2CAP security level\n");
+ close(sock);
+ return -1;
+ }
+
+ /* Set up destination address */
+ memset(&dstaddr, 0, sizeof(dstaddr));
+ dstaddr.l2_family = AF_BLUETOOTH;
+ dstaddr.l2_cid = htobs(ATT_CID);
+ dstaddr.l2_bdaddr_type = dst_type;
+ bacpy(&dstaddr.l2_bdaddr, dst);
+
+ printf("Connecting to device...");
+ fflush(stdout);
+
+ if (connect(sock, (struct sockaddr *) &dstaddr, sizeof(dstaddr)) < 0) {
+ perror(" Failed to connect");
+ close(sock);
+ return -1;
+ }
+
+ printf(" Done\n");
+
+ return sock;
+}
+
static void usage(void)
{
printf("btgatt-client\n");
@@ -95,12 +168,13 @@ static struct option main_options[] = {
int main(int argc, char *argv[])
{
int opt;
- int sec;
+ int sec = BT_SECURITY_LOW;
uint16_t mtu = 0;
uint8_t dst_type = BDADDR_LE_PUBLIC;
bool dst_addr_given = false;
bdaddr_t src_addr, dst_addr;
int dev_id = -1;
+ int fd;
while ((opt = getopt_long(argc, argv, "+hvs:m:t:d:i:",
main_options, NULL)) != -1) {
@@ -203,6 +277,10 @@ int main(int argc, char *argv[])
mainloop_init();
+ fd = l2cap_le_att_connect(&src_addr, &dst_addr, dst_type, sec);
+ if (fd < 0)
+ return EXIT_FAILURE;
+
if (mainloop_add_fd(fileno(stdin),
EPOLLIN | EPOLLRDHUP | EPOLLHUP | EPOLLERR,
prompt_read_cb, NULL, NULL) < 0) {
--
2.1.0.rc2.206.gedb03e5
--
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
