Special use case to get the whole 802.15.4 frame over the socket. Interesting
for network monitoring, packet generation and network stacks in userspace.
Signed-off-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxx>
---
examples/Makefile.am | 3 +-
examples/af_packet_rx.c | 95 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 97 insertions(+), 1 deletion(-)
create mode 100644 examples/af_packet_rx.c
diff --git a/examples/Makefile.am b/examples/Makefile.am
index 1ebedf9..2d188a7 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1,4 +1,5 @@
bin_PROGRAMS = af_ieee802154_tx \
- af_ieee802154_rx
+ af_ieee802154_rx \
+ af_packet_rx
EXTRA_DIST = README.examples
diff --git a/examples/af_packet_rx.c b/examples/af_packet_rx.c
new file mode 100644
index 0000000..9770965
--- /dev/null
+++ b/examples/af_packet_rx.c
@@ -0,0 +1,95 @@
+/*
+ * IEEE 802.15.4 socket example
+ *
+ * Copyright (C) 2016 Samsung Electronics Co., Ltd.
+ *
+ * Author: Stefan Schmidt <stefan@xxxxxxxxxxxxxxx>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* gcc af_packet_rx.c -o af_packet_rx */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <net/if.h>
+#include <linux/if_packet.h>
+
+#include <arpa/inet.h>
+#include <sys/ioctl.h>
+
+#define IEEE802154_ADDR_LEN 8
+#define MAX_PACKET_LEN 127
+
+#ifndef ETH_P_IEEE802154
+#define ETH_P_IEEE802154 0x00F6
+#endif
+
+int main(int argc, char *argv[]) {
+ int ret, sd, i;
+ ssize_t len;
+ unsigned char buf[MAX_PACKET_LEN + 1];
+ struct sockaddr_ll sll;
+ struct ifreq ifr;
+
+ /* Create AF_PACKET address family socket for the SOCK_RAW type */
+ sd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_IEEE802154));
+ if (sd < 0) {
+ perror("socket");
+ return 1;
+ }
+
+ /* Get interface index */
+ strncpy(ifr.ifr_name, "monitor0", IFNAMSIZ);
+ ret = ioctl(sd, SIOCGIFINDEX, &ifr);
+ if (ret < 0) {
+ perror("ioctl");
+ close(sd);
+ return 1;
+ }
+
+ /* Prepare source socket address struct */
+ memset(&sll, 0, sizeof(sll));
+ sll.sll_family = AF_PACKET;
+ sll.sll_ifindex = ifr.ifr_ifindex;
+ sll.sll_protocol = htons(ETH_P_IEEE802154);
+
+ /* Bind socket on this side */
+ ret = bind(sd, (struct sockaddr *)&sll, sizeof(sll));
+ if (ret < 0) {
+ perror("bind");
+ close(sd);
+ return 1;
+ }
+
+ while (1) {
+ /* Receive and print the whole packet payload, including FCS */
+ len = recv(sd, buf, MAX_PACKET_LEN, 0);
+ if (len < 0) {
+ perror("recv");
+ continue;
+ }
+ printf("Received:");
+ for (i = 0; i < len; i++)
+ printf(" %x", buf[i]);
+ printf("\n");
+ }
+
+ shutdown(sd, SHUT_RDWR);
+ close(sd);
+ return 0;
+}
--
2.5.5
--
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