[HICN-380] add libhicnctrl example (create face)

Change-Id: I230d4cc51710fa4ce7ce24c97cd72b1fc7d1f573
Signed-off-by: Jordan Augé <jordan.auge+fdio@cisco.com>

2 files changed, 154 insertions, 0 deletions

diff --git a/ctrl/libhicnctrl/examples/Makefile b/ctrl/libhicnctrl/examples/Makefile
new file mode 100644
index 000000000..a6c6f0570
--- /dev/null
+++ b/ctrl/libhicnctrl/examples/Makefile
@@ -0,0 +1,20 @@
+EXEC     = $(shell basename $$(pwd))
+CC       = gcc
+
+CFLAGS   = -std=gnu11 -O3 -Wall -Wextra -Wpedantic -Wstrict-aliasing -DWITH_POLICY=1
+LDFLAGS  = -lhicn -lhicnctrl
+
+SRC      = $(wildcard *.c)
+EXEC     = $(SRC:.c=)
+
+all: $(EXEC)
+
+${EXEC}: $(SRC)
+	$(CC) -o $@ $< $(CFLAGS) $(LDFLAGS)
+
+.PHONY: clean mrproper
+
+clean:
+	@rm -rf $(EXEC)
+
+mrproper: clean
diff --git a/ctrl/libhicnctrl/examples/create_face.c b/ctrl/libhicnctrl/examples/create_face.c
new file mode 100644
index 000000000..270ceeab9
--- /dev/null
+++ b/ctrl/libhicnctrl/examples/create_face.c
@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * \file examples/create_face.c
+ * \brief libhicnctrl sample code : IPV4/UDP face creation
+ *
+ * NOTES:
+ *  - This sample code is IPv4 only
+ */
+
+#include <stdlib.h>
+#include <sys/types.h> // getifaddrs
+#include <ifaddrs.h> // getifaddrs
+#include <stdio.h>
+#include <string.h> /* for strncpy */
+#include <sys/socket.h> // socket
+#include <sys/ioctl.h> // ioctl
+#include <unistd.h>
+
+#include <hicn/ctrl.h>
+#include <hicn/util/log.h>
+
+int get_local_info(char * if_name, ip_address_t * local_ip) {
+    struct ifaddrs *addrs;
+    struct ifreq ifr = {
+        .ifr_addr.sa_family = AF_INET,
+    };
+    int ret = -1;
+
+    int fd = socket(AF_INET, SOCK_DGRAM, 0);
+
+    getifaddrs(&addrs);
+
+    for (struct ifaddrs * tmp = addrs; tmp; tmp = tmp->ifa_next) {
+        if (!tmp->ifa_addr || tmp->ifa_addr->sa_family != AF_PACKET)
+            continue;
+        if (strcmp(tmp->ifa_name, "lo") == 0)
+            continue;
+        snprintf(if_name, IFNAMSIZ, "%s", tmp->ifa_name);
+
+        snprintf(ifr.ifr_name, IFNAMSIZ, "%s", tmp->ifa_name);
+        if (ioctl(fd, SIOCGIFADDR, &ifr) == 1) {
+            perror("ioctl");
+            continue;
+        }
+
+        local_ip->v4.as_inaddr = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr;
+
+        ret = 0;
+        break;
+    }
+
+    freeifaddrs(addrs);
+    close(fd);
+    return ret;
+}
+
+int main() {
+    char remote_ip_str[INET_ADDRSTRLEN] = "1.1.1.1";
+
+    ip_address_t local_ip;
+    ip_address_t remote_ip;
+    char if_name[IFNAMSIZ];
+
+    /* Retrieving local info */
+
+    if (get_local_info(if_name, &local_ip) < 0) {
+        DEBUG("Error getting local information");
+        return -1;
+    }
+
+    char local_ip_str[MAXSZ_IP_ADDRESS];
+    ip_address_snprintf(local_ip_str, MAXSZ_IP_ADDRESS, &local_ip, AF_INET);
+    DEBUG("Local information :");
+    DEBUG("  - Interface name : %s", if_name);
+    DEBUG("  - IP address     : %s", local_ip_str);
+
+    if (ip_address_pton (remote_ip_str, &remote_ip) < 0){
+        DEBUG("Error parsing remote IP address");
+        return -1;
+    }
+
+    /* Filling face information */
+    hc_face_t face = {
+        .face = {
+            .type = FACE_TYPE_UDP,
+            .local_addr = local_ip,
+            .remote_addr = remote_ip,
+            .local_port = 6000,
+            .remote_port = 6000,
+        },
+    };
+    if (netdevice_set_name(&face.face.netdevice, if_name) < 0) {
+        DEBUG("Error setting face netdevice name");
+        return -1;
+    }
+
+    /* Connecting to socket and creating face */
+
+    hc_sock_t * socket = hc_sock_create();
+    if (!socket){
+        DEBUG("Error creating libhicnctrl socket");
+        return -1;
+    }
+
+    if (hc_sock_connect(socket) < 0){
+        DEBUG("Error connecting to forwarder");
+        return -1;
+    }
+
+    if (hc_face_create(socket, &face) < 0){
+        DEBUG("Error creating face");
+        return -1;
+    }
+
+    DEBUG("Face created successfully");
+
+    hc_sock_free(socket);
+
+    return 0;
+}