1 files changed, 69 insertions, 0 deletions
diff --git a/src/libgsmd/libgsmd.c b/src/libgsmd/libgsmd.c
new file mode 100644
index 0000000..e514617
--- /dev/null
+++ b/src/libgsmd/libgsmd.c
@@ -0,0 +1,69 @@
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <libgsmd/libgsmd.h>
+
+#include "lgsm_internals.h"
+
+static int lgsm_open_backend(struct lgsm_handle *lh, const char *device)
+{
+	int rc;
+
+	if (!strcmp(device, "gsmd")) {
+		struct sockaddr_un sun;
+		
+		/* use unix domain socket to gsm daemon */
+		lh->fd = socket(PF_UNIX, GSMD_UNIX_SOCKET_TYPE, 0);
+		if (lh->fd < 0)
+			return lh->fd;
+		
+		sun.sun_family = AF_UNIX;
+		memcpy(sun.sun_path, GSMD_UNIX_SOCKET, sizeof(GSMD_UNIX_SOCKET));
+
+		rc = connect(lh->fd, (struct sockaddr *)&sun, sizeof(sun));
+		if (rc < 0) {
+			close(lh->fd);
+			lh->fd = -1;
+			return rc;
+		}
+	} else {
+		/* use direct access to device node ([virtual] tty device) */
+		lh->fd = open(device, O_RDWR);
+		if (lh->fd < 0)
+			return lh->fd;
+	}
+	
+	return 0;
+}
+
+struct lgsm_handle *lgsm_init(const char *device)
+{
+	struct lgsm_handle *lh = malloc(sizeof(*lh));
+
+	memset(lh, 0, sizeof(*lh));
+	lh->fd = -1;
+
+	if (lgsm_open_backend(lh, device) < 0) {
+		free(lh);
+		return NULL;
+	}
+
+	/* send some initial commands, such as ATV1 (verbose response)
+	 * and +CRC=1 (which we currently require!) */
+
+	return lh;
+}
+
+int lgsm_exit(struct lgsm_handle *lh)
+{
+	free(lh);
+
+	return 0;
+}