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authorMatthias Schiffer <mschiffer@universe-factory.net>2013-08-07 18:39:52 +0200
committerMatthias Schiffer <mschiffer@universe-factory.net>2013-08-07 18:39:52 +0200
commit86e480042887f18f0ac2a73a49da33b5625cf9b3 (patch)
tree054ed2d4e0f28887be0869aff3d2540b49cb4181 /src/tuntap.c
parent1150b8a7bf3dbeaa766fccac946ce831e187c6b2 (diff)
downloadfastd-86e480042887f18f0ac2a73a49da33b5625cf9b3.tar
fastd-86e480042887f18f0ac2a73a49da33b5625cf9b3.zip
Add FreeBSD implementation of fastd_tuntap_open()
Diffstat (limited to 'src/tuntap.c')
-rw-r--r--src/tuntap.c101
1 files changed, 100 insertions, 1 deletions
diff --git a/src/tuntap.c b/src/tuntap.c
index 6d809c0..e94be05 100644
--- a/src/tuntap.c
+++ b/src/tuntap.c
@@ -30,8 +30,10 @@
#include <net/if.h>
#include <sys/ioctl.h>
-#include <linux/if_tun.h>
+#if defined(__linux__)
+
+#include <linux/if_tun.h>
void fastd_tuntap_open(fastd_context_t *ctx) {
struct ifreq ifr = {};
@@ -82,6 +84,103 @@ void fastd_tuntap_open(fastd_context_t *ctx) {
pr_debug(ctx, "tun/tap device initialized.");
}
+#elif defined(__FreeBSD__)
+
+#include <net/if_tun.h>
+#include <net/if_tap.h>
+
+static void get_tap_name(fastd_context_t *ctx) {
+ struct ifreq ifr = {};
+
+ if (ioctl(ctx->tunfd, TAPGIFNAME, &ifr) < 0)
+ exit_errno(ctx, "TAPGIFNAME ioctl failed");
+
+ free(ctx->ifname);
+ ctx->ifname = strndup(ifr.ifr_name, IFNAMSIZ-1);
+}
+
+static void set_tap_mtu(fastd_context_t *ctx) {
+ struct tapinfo tapinfo;
+
+ if (ioctl(ctx->tunfd, TAPGIFINFO, &tapinfo) < 0)
+ exit_errno(ctx, "TAPGIFINFO ioctl failed");
+
+ tapinfo.mtu = ctx->conf->mtu;
+
+ if (ioctl(ctx->tunfd, TAPSIFINFO, &tapinfo) < 0)
+ exit_errno(ctx, "TAPSIFINFO ioctl failed");
+}
+
+static void set_tun_mtu(fastd_context_t *ctx) {
+ struct tuninfo tuninfo;
+
+ if (ioctl(ctx->tunfd, TUNGIFINFO, &tuninfo) < 0)
+ exit_errno(ctx, "TUNGIFINFO ioctl failed");
+
+ tuninfo.mtu = ctx->conf->mtu;
+
+ if (ioctl(ctx->tunfd, TUNSIFINFO, &tuninfo) < 0)
+ exit_errno(ctx, "TUNSIFINFO ioctl failed");
+}
+
+void fastd_tuntap_open(fastd_context_t *ctx) {
+ pr_debug(ctx, "initializing tun/tap device...");
+
+ char ifname[5+IFNAMSIZ] = "/dev/";
+ if (ctx->conf->ifname) {
+ strncat(ifname, ctx->conf->ifname, IFNAMSIZ-1);
+ }
+ else {
+ switch (ctx->conf->mode) {
+ case MODE_TAP:
+ strncat(ifname, "tap", IFNAMSIZ-1);
+ break;
+
+ case MODE_TUN:
+ strncat(ifname, "tun", IFNAMSIZ-1);
+ break;
+
+ default:
+ exit_bug(ctx, "invalid mode");
+ }
+ }
+
+ if ((ctx->tunfd = open(ifname, O_RDWR|O_CLOEXEC|O_NONBLOCK)) < 0)
+ exit_errno(ctx, "could not open tun/tap device file");
+
+ if (!(ctx->ifname = fdevname_r(ctx->tunfd, malloc(IFNAMSIZ), IFNAMSIZ)))
+ exit_errno(ctx, "could not get tun/tap interface name");
+
+ switch (ctx->conf->mode) {
+ case MODE_TAP:
+ if (strncmp(ctx->ifname, "tap", 3) != 0)
+ exit_error(ctx, "opened device doesn't to be a tap device");
+
+ get_tap_name(ctx);
+ set_tap_mtu(ctx);
+ break;
+
+ case MODE_TUN:
+ if (strncmp(ctx->ifname, "tun", 3) != 0)
+ exit_error(ctx, "opened device doesn't to be a tun device");
+
+ set_tun_mtu(ctx);
+ break;
+
+ default:
+ exit_bug(ctx, "invalid mode");
+ }
+
+ pr_debug(ctx, "tun/tap device initialized.");
+}
+
+#else
+
+#error unknown tun/tap implementation
+
+#endif
+
+
void fastd_tuntap_close(fastd_context_t *ctx) {
if (close(ctx->tunfd))
pr_warn_errno(ctx, "closing tun/tap: close");