host: use autotools and split shared code to libosmo-simtrace2
Change-Id: I57e77f927ee9e169cc794c5dc6b128a2d590201b
diff --git a/host/src/usb2udp.c b/host/src/usb2udp.c
new file mode 100644
index 0000000..9927594
--- /dev/null
+++ b/host/src/usb2udp.c
@@ -0,0 +1,285 @@
+/* simtrace - main program for the host PC
+ *
+ * (C) 2010-2016 by Harald Welte <hwelte@hmw-consulting.de>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+#include <errno.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <time.h>
+#define _GNU_SOURCE
+#include <getopt.h>
+#include <poll.h>
+
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <libusb.h>
+
+#include <osmocom/simtrace2/simtrace_usb.h>
+#include <osmocom/simtrace2/simtrace_prot.h>
+#include "simtrace2-discovery.h"
+
+#include <osmocom/core/utils.h>
+#include <osmocom/core/socket.h>
+#include <osmocom/core/select.h>
+
+struct libusb_device_handle *g_devh;
+static struct sockaddr_in g_sa_remote;
+static struct osmo_fd g_udp_ofd;
+
+static void print_welcome(void)
+{
+ printf("usb2udp - UDP/IP forwarding of SIMtrace card emulation\n"
+ "(C) 2016 by Harald Welte <laforge@gnumonks.org>\n\n");
+}
+
+static void print_help(void)
+{
+ printf( "\t-h\t--help\n"
+ "\t-i\t--interface <0-255>\n"
+ "\n"
+ );
+}
+
+struct ep_buf {
+ uint8_t ep;
+ uint8_t buf[1024];
+ struct libusb_transfer *xfer;
+};
+static struct ep_buf g_buf_in;
+static struct ep_buf g_buf_out;
+
+static void usb_in_xfer_cb(struct libusb_transfer *xfer)
+{
+ int rc;
+
+ printf("xfer_cb(ep=%02x): status=%d, flags=0x%x, type=%u, len=%u, act_len=%u\n",
+ xfer->endpoint, xfer->status, xfer->flags, xfer->type, xfer->length, xfer->actual_length);
+ switch (xfer->status) {
+ case LIBUSB_TRANSFER_COMPLETED:
+ if (xfer->endpoint == g_buf_in.ep) {
+ /* process the data */
+ printf("read %d bytes from SIMTRACE, forwarding to UDP\n", xfer->actual_length);
+ rc = sendto(g_udp_ofd.fd, xfer->buffer, xfer->actual_length, 0, (struct sockaddr *)&g_sa_remote, sizeof(g_sa_remote));
+ if (rc <= 0) {
+ fprintf(stderr, "error writing to UDP\n");
+ }
+ /* and re-submit the URB */
+ libusb_submit_transfer(xfer);
+ } else if (xfer->endpoint == g_buf_out.ep) {
+ /* re-enable reading from the UDP side */
+ g_udp_ofd.when |= BSC_FD_READ;
+ }
+ break;
+ default:
+ fprintf(stderr, "xfer_cb(ERROR '%s')\n", osmo_hexdump_nospc(xfer->buffer, xfer->actual_length));
+ break;
+ }
+}
+
+static void init_ep_buf(struct ep_buf *epb)
+{
+ if (!epb->xfer)
+ epb->xfer = libusb_alloc_transfer(0);
+
+ epb->xfer->flags = 0;
+
+ libusb_fill_bulk_transfer(epb->xfer, g_devh, epb->ep, epb->buf, sizeof(epb->buf), usb_in_xfer_cb, NULL, 0);
+}
+
+/***********************************************************************
+ * libosmocore main loop integration of libusb async I/O
+ ***********************************************************************/
+
+static int g_libusb_pending = 0;
+
+static int ofd_libusb_cb(struct osmo_fd *ofd, unsigned int what)
+{
+ /* FIXME */
+ g_libusb_pending = 1;
+
+ return 0;
+}
+
+/* call-back when libusb adds a FD */
+static void libusb_fd_added_cb(int fd, short events, void *user_data)
+{
+ struct osmo_fd *ofd = talloc_zero(NULL, struct osmo_fd);
+
+ printf("%s(%u, %x)\n", __func__, fd, events);
+
+ ofd->fd = fd;
+ ofd->cb = &ofd_libusb_cb;
+ if (events & POLLIN)
+ ofd->when |= BSC_FD_READ;
+ if (events & POLLOUT)
+ ofd->when |= BSC_FD_WRITE;
+
+ osmo_fd_register(ofd);
+}
+
+/* call-back when libusb removes a FD */
+static void libusb_fd_removed_cb(int fd, void *user_data)
+{
+
+ printf("%s(%u)\n", __func__, fd);
+#if 0
+ struct osmo_fd *ofd;
+ /* FIXME: This needs new export in libosmocore! */
+ ofd = osmo_fd_get_by_fd(fd);
+
+ if (ofd) {
+ osmo_fd_unregister(ofd);
+ talloc_free(ofd);
+ }
+#endif
+}
+
+/* call-back when the UDP socket is readable */
+static int ofd_udp_cb(struct osmo_fd *ofd, unsigned int what)
+{
+ int rc;
+ socklen_t addrlen = sizeof(g_sa_remote);
+
+ rc = recvfrom(ofd->fd, g_buf_out.buf, sizeof(g_buf_out.buf), 0,
+ (struct sockaddr *)&g_sa_remote, &addrlen);
+ if (rc <= 0) {
+ fprintf(stderr, "error reading from UDP\n");
+ return 0;
+ }
+ printf("read %d bytes from UDP, forwarding to SIMTRACE\n", rc);
+ g_buf_out.xfer->length = rc;
+
+ /* disable further READ interest for the UDP socket */
+ ofd->when &= ~BSC_FD_READ;
+
+ /* submit the URB on the OUT end point */
+ libusb_submit_transfer(g_buf_out.xfer);
+
+ return 0;
+}
+
+static void run_mainloop(void)
+{
+ int rc;
+
+ printf("Entering main loop\n");
+
+ while (1) {
+ osmo_select_main(0);
+ if (g_libusb_pending) {
+ struct timeval tv;
+ memset(&tv, 0, sizeof(tv));
+ rc = libusb_handle_events_timeout_completed(NULL, &tv, NULL);
+ if (rc != 0) {
+ fprintf(stderr, "handle_events_timeout_completed == %d\n", rc);
+ break;
+ }
+ }
+ }
+}
+
+int main(int argc, char **argv)
+{
+ int rc;
+ int c, ret = 1;
+ int local_udp_port = 52342;
+ unsigned int if_num = 0;
+
+ print_welcome();
+
+ while (1) {
+ int option_index = 0;
+ static const struct option opts[] = {
+ { "udp-port", 1, 0, 'u' },
+ { "interface", 1, 0, 'I' },
+ { "help", 0, 0, 'h' },
+ { NULL, 0, 0, 0 }
+ };
+
+ c = getopt_long(argc, argv, "u:I:h", opts, &option_index);
+ if (c == -1)
+ break;
+ switch (c) {
+ case 'u':
+ local_udp_port = atoi(optarg);
+ break;
+ case 'I':
+ if_num = atoi(optarg);
+ break;
+ case 'h':
+ print_help();
+ exit(0);
+ break;
+ }
+ }
+
+ rc = libusb_init(NULL);
+ if (rc < 0) {
+ fprintf(stderr, "libusb initialization failed\n");
+ goto close_exit;
+ }
+
+ libusb_set_pollfd_notifiers(NULL, &libusb_fd_added_cb, &libusb_fd_removed_cb, NULL);
+
+ g_devh = libusb_open_device_with_vid_pid(NULL, USB_VENDOR_OPENMOKO, USB_PRODUCT_OWHW_SAM3);
+ if (!g_devh) {
+ fprintf(stderr, "can't open USB device\n");
+ goto close_exit;
+ }
+
+ rc = libusb_claim_interface(g_devh, if_num);
+ if (rc < 0) {
+ fprintf(stderr, "can't claim interface %u; rc=%d\n", if_num, rc);
+ goto close_exit;
+ }
+
+ /* open UDP socket, register with select handling and mark it
+ * readable */
+ g_udp_ofd.cb = ofd_udp_cb;
+ osmo_sock_init_ofd(&g_udp_ofd, AF_INET, SOCK_DGRAM, IPPROTO_UDP, NULL, local_udp_port + if_num, OSMO_SOCK_F_BIND);
+
+ rc = get_usb_ep_addrs(g_devh, if_num, &g_buf_out.ep, &g_buf_in.ep, NULL);
+ if (rc < 0) {
+ fprintf(stderr, "couldn't find enpdoint addresses; rc=%d\n", rc);
+ goto close_exit;
+ }
+ /* initialize USB buffers / transfers */
+ init_ep_buf(&g_buf_out);
+ init_ep_buf(&g_buf_in);
+
+ /* submit the first transfer for the IN endpoint */
+ libusb_submit_transfer(g_buf_in.xfer);
+
+ run_mainloop();
+
+ ret = 0;
+
+ libusb_release_interface(g_devh, 0);
+close_exit:
+ if (g_devh)
+ libusb_close(g_devh);
+
+ libusb_exit(NULL);
+ return ret;
+}