[HICN-701] facemgr: add priority controller mobility example

Change-Id: Id2c41164a59329e206e430e82f107cf5d4db8ae1
Signed-off-by: Jordan Augé <jordan.auge+fdio@cisco.com>

2 files changed, 111 insertions, 0 deletions

diff --git a/ctrl/facemgr/examples/mobility/Makefile b/ctrl/facemgr/examples/mobility/Makefile
new file mode 100644
index 000000000..3b92d9d5f
--- /dev/null
+++ b/ctrl/facemgr/examples/mobility/Makefile
@@ -0,0 +1,23 @@
+EXEC     = $(shell basename $$(pwd))
+CC       = gcc
+
+CFLAGS   = -std=gnu11 -O3 -Wall -Wextra -Wpedantic -Wstrict-aliasing
+
+SRC      = $(wildcard *.c)
+OBJ      = $(SRC:.c=.o)
+
+all: $(EXEC)
+
+${EXEC}: $(OBJ)
+	$(CC) -o $@ $^ $(LDFLAGS)
+
+%.o: %.c
+	$(CC) -o $@ -c $< $(CFLAGS)
+
+.PHONY: clean mrproper
+
+clean:
+	@rm -rf *.o
+
+mrproper: clean
+	@rm -rf $(EXEC)
diff --git a/ctrl/facemgr/examples/mobility/mobility.c b/ctrl/facemgr/examples/mobility/mobility.c
new file mode 100644
index 000000000..528951446
--- /dev/null
+++ b/ctrl/facemgr/examples/mobility/mobility.c
@@ -0,0 +1,88 @@
+/*
+ * Dummy server sending alternating bytes to all clients.
+ *
+ * This program can be used to trigger mobility events in the hICN forwarder, to
+ * switch from WiFi to LTE and back, at regular intervals.
+ *
+ * Test server using nc: nc -4kvul localhost 9533
+ */
+
+#include <arpa/inet.h> // inet_ntop
+#include <errno.h> // EINTR,. ..
+#include <netinet/in.h> // INET_ADDRSTRLEN, INET6_ADDRSTRLEN
+#include <stdio.h>
+#include <inttypes.h>
+
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <sys/timerfd.h>
+#include <sys/un.h> // sockaddr_un
+#include <unistd.h> // fcntl
+#include <fcntl.h> // fcntl
+
+#define MS2US(x) (x * 1000)
+
+/**
+ * \brief Main function
+ */
+int main(int argc, char **argv)
+{
+    int rc;
+
+    if (argc != 4) {
+        fprintf(stderr, "Usage: %s IP PORT INTERVAL\n", argv[0]);
+        fprintf(stderr, "\n");
+        fprintf(stderr, "    IP       Target hostname\n");
+        fprintf(stderr, "    PORT     Target port\n");
+        fprintf(stderr, "    INTERVAL Interval between mobility events (in ms)\n");
+        fprintf(stderr, "\n");
+        exit(EXIT_FAILURE);
+    }
+
+    int interval = atoi(argv[3]);
+
+    int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+    if (fd < 0) {
+        perror("socket");
+        goto ERR_SOCKET;
+    }
+
+    struct sockaddr_in addr;
+    memset(&addr, 0, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_addr.s_addr = inet_addr(argv[1]);
+    addr.sin_port = htons(atoi(argv[2]));
+
+    if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
+        perror("connect");
+        goto ERR_CONNECT;
+    }
+
+    unsigned state = 0;
+    char buf[1];
+    for(;;) {
+        usleep(MS2US(interval));
+
+        buf[0] = state;
+        rc = send(fd, buf, 1, 0);
+        if (rc < 0) {
+            if (errno == ECONNREFUSED) {
+                continue;
+            }
+            perror("send");
+            goto ERR_SEND;
+        }
+
+        state = 1 - state;
+    }
+
+    close(fd);
+
+    exit(EXIT_SUCCESS);
+
+ERR_SEND:
+ERR_CONNECT:
+    close(fd);
+ERR_SOCKET:
+    exit(EXIT_FAILURE);
+}