1 files changed, 153 insertions, 0 deletions
diff --git a/vag-bap-dump.c b/vag-bap-dump.c
new file mode 100644
index 0000000..e9fb9bc
--- /dev/null
+++ b/vag-bap-dump.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright 2017 Max Staudt
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <linux/can.h>
+#include <linux/can/raw.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+
+#include "vag-bap.h"
+
+
+
+
+static int net_init(char *ifname)
+{
+        int s;
+	int recv_own_msgs;
+	struct sockaddr_can addr;
+	struct ifreq ifr;
+
+	s = socket(PF_CAN, SOCK_RAW, CAN_RAW);
+	if (s < 0) {
+		perror("socket");
+		exit(1);
+	}
+
+	/* Convert interface name to index */
+	memset(&ifr.ifr_name, 0, sizeof(ifr.ifr_name));
+	strncpy(ifr.ifr_name, ifname, IFNAMSIZ);
+	if (ioctl(s, SIOCGIFINDEX, &ifr) < 0) {
+		perror("SIOCGIFINDEX");
+		exit(1);
+	}
+
+	/* Open the CAN interface */
+	memset(&addr, 0, sizeof(addr));
+	addr.can_family = AF_CAN;
+	addr.can_ifindex = ifr.ifr_ifindex;
+	if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+		perror("bind");
+		return 0;
+	}
+
+	recv_own_msgs = 1; /* 0 = disabled (default), 1 = enabled */
+	setsockopt(s, SOL_CAN_RAW, CAN_RAW_RECV_OWN_MSGS,
+			&recv_own_msgs, sizeof(recv_own_msgs));
+
+	return s;
+}
+
+
+
+
+
+int main(int argc, char **argv)
+{
+  	fd_set rdfs;
+	int s;
+	int i;
+	int can_id_count;
+	unsigned *can_ids;
+	struct BAP_RXer **baps;
+
+	if (argc < 3) {
+		printf("syntax: %s IFNAME CAN_ID [CAN_ID CAN_ID ...]\n", argv[0]);
+		return 1;
+	}
+
+	can_id_count = argc - 2;
+
+	can_ids = calloc(can_id_count, sizeof(*can_ids));
+	baps = calloc(can_id_count, sizeof(*baps));
+	if (!can_ids || !baps) {
+		printf("Out of memory allocating meta structs.\n");
+		return 1;
+	}
+
+	for (i = 0; i < can_id_count; i++) {
+		can_ids[i] = strtoul(argv[2 + i], NULL, 0);
+		baps[i] = vag_bap_rxer_alloc();
+		if (!baps[i]) {
+			printf("Out of memory allocating BAP struct.\n");
+			return 1;
+		}
+
+		printf("Listening for CAN ID: %x\n", can_ids[i]);
+	}
+
+
+	s = net_init(argv[1]);
+
+	while (1) {
+		int retval;
+
+		FD_ZERO(&rdfs);
+		FD_SET(s, &rdfs);
+
+		retval = select(s+1, &rdfs, NULL, NULL, NULL);
+		/* We currently rely on Linux timeout behavior here,
+		 * i.e. the timeout now reflects the remaining time */
+		if (retval < 0) {
+			perror("select");
+			return 1;
+		} else if (!retval) {
+			/* Timeout, we NEED to check this first */
+		} else if (FD_ISSET(s, &rdfs)) {
+			struct can_frame frame;
+			ssize_t ret;
+
+			ret = read(s, &frame, sizeof(frame));
+			if (ret < 0) {
+				perror("read from CAN socket");
+				return 1;
+			}
+
+			for (i = 0; i < can_id_count; i++) {
+				if (can_ids[i] == frame.can_id) {
+					struct BAP_Frame *bap_frame;
+					struct BAP_RXer *bap = baps[i];
+
+					bap_frame = vag_bap_handle_can_frame(bap, &frame);
+					if (bap_frame) {
+						printf("%03x:  ", frame.can_id);
+						vag_bap_frame_dump(bap_frame);
+						vag_bap_frame_free(bap_frame);
+					}
+
+					break;
+				}
+			}
+
+			continue;
+		}
+	}
+
+	/* TODO: Free */
+
+	close(s);
+
+	return 0;
+}