test: Porting FreeBSD

lib/tun/linux-setup.c

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2019 by Sukchan Lee <acetcom@gmail.com>
+ *
+ * This file is part of Open5GS.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "ogs-tun.h"
+
+#undef OGS_LOG_DOMAIN
+#define OGS_LOG_DOMAIN __ogs_sock_domain
+
+#include <net/if.h>
+#include <net/route.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#include <linux/if_tun.h>
+
+#ifndef IFNAMSIZ
+#define IFNAMSIZ 32
+#endif
+
+ogs_socket_t ogs_tun_open(char *ifname, int len, int is_tap)
+{
+    ogs_socket_t fd = INVALID_SOCKET;
+
+    const char *dev = "/dev/net/tun";
+    int rc;
+    struct ifreq ifr;
+    int flags = IFF_NO_PI;
+
+    ogs_assert(ifname);
+
+    fd = open(dev, O_RDWR);
+    if (fd < 0) {
+        ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
+                "open() failed : dev[%s]", dev);
+        return INVALID_SOCKET;
+    }
+
+    memset(&ifr, 0, sizeof(ifr));
+
+    ifr.ifr_flags = (is_tap ? (flags | IFF_TAP) : (flags | IFF_TUN));
+    strncpy(ifr.ifr_name, ifname, IFNAMSIZ-1);
+
+    rc = ioctl(fd, TUNSETIFF, (void *)&ifr);
+    if (rc < 0) {
+        ogs_log_message(OGS_LOG_ERROR, ogs_socket_errno,
+                "ioctl() failed : dev[%s] flags[0x%x]", dev, flags);
+        goto cleanup;
+    }
+
+    return fd;
+
+cleanup:
+    close(fd);
+    return INVALID_SOCKET;
+}
+
+int ogs_tun_set_ip(char *ifname, ogs_ipsubnet_t *gw, ogs_ipsubnet_t *sub)
+{
+    return OGS_OK;
+}