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-rw-r--r--src/tuntap.c132
1 files changed, 72 insertions, 60 deletions
diff --git a/src/tuntap.c b/src/tuntap.c
index 591f8d4..a303d20 100644
--- a/src/tuntap.c
+++ b/src/tuntap.c
@@ -66,13 +66,13 @@ static const bool multiaf_tun = true;
#ifdef __linux__
/** Opens the TUN/TAP device helper shared by Android and Linux targets */
-static void tuntap_open_linux(const char * dev_name) {
+static void tuntap_open_linux(fastd_iface_t *iface, const char *dev_name) {
pr_debug("initializing tun/tap device...");
struct ifreq ifr = {};
- ctx.tunfd = FASTD_POLL_FD(POLL_TYPE_IFACE, open(dev_name, O_RDWR|O_NONBLOCK));
- if (ctx.tunfd.fd < 0)
+ iface->fd = FASTD_POLL_FD(POLL_TYPE_IFACE, open(dev_name, O_RDWR|O_NONBLOCK));
+ if (iface->fd.fd < 0)
exit_errno("could not open tun/tap device file");
if (conf.ifname)
@@ -92,10 +92,10 @@ static void tuntap_open_linux(const char * dev_name) {
}
ifr.ifr_flags |= IFF_NO_PI;
- if (ioctl(ctx.tunfd.fd, TUNSETIFF, &ifr) < 0)
+ if (ioctl(iface->fd.fd, TUNSETIFF, &ifr) < 0)
exit_errno("TUNSETIFF ioctl failed");
- ctx.ifname = fastd_strndup(ifr.ifr_name, IFNAMSIZ-1);
+ iface->name = fastd_strndup(ifr.ifr_name, IFNAMSIZ-1);
int ctl_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (ctl_sock < 0)
@@ -113,7 +113,7 @@ static void tuntap_open_linux(const char * dev_name) {
if (close(ctl_sock))
pr_error_errno("close");
- fastd_poll_fd_register(&ctx.tunfd);
+ fastd_poll_fd_register(&iface->fd);
pr_debug("tun/tap device initialized.");
}
@@ -123,7 +123,7 @@ static void tuntap_open_linux(const char * dev_name) {
#if defined(__ANDROID__)
/** Opens the TUN/TAP device */
-void fastd_tuntap_open(void) {
+static void tuntap_open(fastd_iface_t *iface) {
pr_debug("initializing tun device...");
if (conf.android_integration) {
@@ -132,38 +132,38 @@ void fastd_tuntap_open(void) {
}
pr_debug("using android TUN fd");
- ctx.tunfd = FASTD_POLL_FD(POLL_TYPE_IFACE, fastd_android_receive_tunfd());
+ iface->fd = FASTD_POLL_FD(POLL_TYPE_IFACE, fastd_android_receive_tunfd());
fastd_android_send_pid();
- fastd_poll_fd_register(&ctx.tunfd);
+ fastd_poll_fd_register(&iface->fd);
pr_debug("tun device initialized.");
} else {
/* this requires root on Android */
- tuntap_open_linux("/dev/tun");
+ tuntap_open_linux(iface, "/dev/tun");
}
}
#elif defined(__linux__)
/** Opens the TUN/TAP device */
-void fastd_tuntap_open(void) {
- tuntap_open_linux("/dev/net/tun");
+static void tuntap_open(fastd_iface_t *iface) {
+ tuntap_open_linux(iface, "/dev/net/tun");
}
#elif defined(__FreeBSD__) || defined(__OpenBSD__)
/** Sets the MTU of the TUN/TAP device */
-static void set_tun_mtu(void) {
+static void set_tun_mtu(fastd_iface_t *iface) {
struct tuninfo tuninfo;
- if (ioctl(ctx.tunfd.fd, TUNGIFINFO, &tuninfo) < 0)
+ if (ioctl(iface->fd.fd, TUNGIFINFO, &tuninfo) < 0)
exit_errno("TUNGIFINFO ioctl failed");
tuninfo.mtu = conf.mtu;
- if (ioctl(ctx.tunfd.fd, TUNSIFINFO, &tuninfo) < 0)
+ if (ioctl(iface->fd.fd, TUNSIFINFO, &tuninfo) < 0)
exit_errno("TUNSIFINFO ioctl failed");
}
@@ -171,42 +171,42 @@ static void set_tun_mtu(void) {
#ifdef __FreeBSD__
/** Sets the MTU of the TAP device */
-static void set_tap_mtu(void) {
+static void set_tap_mtu(fastd_iface_t *iface) {
struct tapinfo tapinfo;
- if (ioctl(ctx.tunfd.fd, TAPGIFINFO, &tapinfo) < 0)
+ if (ioctl(iface->fd.fd, TAPGIFINFO, &tapinfo) < 0)
exit_errno("TAPGIFINFO ioctl failed");
tapinfo.mtu = conf.mtu;
- if (ioctl(ctx.tunfd.fd, TAPSIFINFO, &tapinfo) < 0)
+ if (ioctl(iface->fd.fd, TAPSIFINFO, &tapinfo) < 0)
exit_errno("TAPSIFINFO ioctl failed");
}
/** Sets up the TUN device */
-static void setup_tun(void) {
+static void setup_tun(fastd_iface_t *iface) {
int one = 1;
- if (ioctl(ctx.tunfd.fd, TUNSIFHEAD, &one) < 0)
+ if (ioctl(iface->fd.fd, TUNSIFHEAD, &one) < 0)
exit_errno("TUNSIFHEAD ioctl failed");
- set_tun_mtu();
+ set_tun_mtu(iface);
}
/** Sets up the TAP device */
-static void setup_tap(void) {
+static void setup_tap(fastd_iface_t *iface) {
struct ifreq ifr = {};
- if (ioctl(ctx.tunfd.fd, TAPGIFNAME, &ifr) < 0)
+ if (ioctl(iface->fd.fd, TAPGIFNAME, &ifr) < 0)
exit_errno("TAPGIFNAME ioctl failed");
- free(ctx.ifname);
- ctx.ifname = fastd_strndup(ifr.ifr_name, IFNAMSIZ-1);
+ free(iface->name);
+ iface->name = fastd_strndup(ifr.ifr_name, IFNAMSIZ-1);
- set_tap_mtu();
+ set_tap_mtu(iface);
}
/** Opens the TUN/TAP device */
-void fastd_tuntap_open(void) {
+static void tuntap_open(fastd_iface_t *iface) {
pr_debug("initializing tun/tap device...");
char ifname[5+IFNAMSIZ] = "/dev/";
@@ -235,41 +235,41 @@ void fastd_tuntap_open(void) {
strncat(ifname, type, IFNAMSIZ-1);
}
- ctx.tunfd = FASTD_POLL_FD(POLL_TYPE_IFACE, open(ifname, O_RDWR|O_NONBLOCK));
- if (ctx.tunfd.fd < 0)
+ iface->fd = FASTD_POLL_FD(POLL_TYPE_IFACE, open(ifname, O_RDWR|O_NONBLOCK));
+ if (iface->fd.fd < 0)
exit_errno("could not open tun/tap device file");
- if (!(ctx.ifname = fdevname_r(ctx.tunfd.fd, fastd_alloc(IFNAMSIZ), IFNAMSIZ)))
+ if (!(iface->name = fdevname_r(iface->fd.fd, fastd_alloc(IFNAMSIZ), IFNAMSIZ)))
exit_errno("could not get tun/tap interface name");
switch (conf.mode) {
case MODE_TAP:
- setup_tap();
+ setup_tap(iface);
break;
case MODE_TUN:
- setup_tun();
+ setup_tun(iface);
break;
default:
exit_bug("invalid mode");
}
- fastd_poll_fd_register(&ctx.tunfd);
+ fastd_poll_fd_register(&iface->fd);
pr_debug("tun/tap device initialized.");
}
#else /* __OpenBSD__ */
-static void set_link0(bool set) {
+static void set_link0(fastd_iface_t *iface, bool set) {
struct ifreq ifr = {};
int ctl_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (ctl_sock < 0)
exit_errno("socket");
- strncpy(ifr.ifr_name, ctx.ifname, IFNAMSIZ-1);
+ strncpy(ifr.ifr_name, iface->name, IFNAMSIZ-1);
if (ioctl(ctl_sock, SIOCGIFFLAGS, &ifr) < 0)
exit_errno("SIOCGIFFLAGS ioctl failed");
@@ -286,19 +286,19 @@ static void set_link0(bool set) {
}
/** Sets up the TUN device */
-static void setup_tun(void) {
- set_link0(false);
- set_tun_mtu();
+static void setup_tun(fastd_iface_t *iface) {
+ set_link0(iface, false);
+ set_tun_mtu(iface);
}
/** Sets up the TAP device */
-static void setup_tap(void) {
- set_link0(true);
- set_tun_mtu();
+static void setup_tap(fastd_iface_t *iface) {
+ set_link0(iface, true);
+ set_tun_mtu(iface);
}
/** Opens the TUN/TAP device */
-void fastd_tuntap_open(void) {
+static void tuntap_open(fastd_iface_t *iface) {
char ifname[5+IFNAMSIZ] = "/dev/";
if (!conf.ifname)
exit_error("config error: no interface name given.");
@@ -309,26 +309,26 @@ void fastd_tuntap_open(void) {
pr_debug("initializing tun device...");
- ctx.tunfd = FASTD_POLL_FD(POLL_TYPE_IFACE, open(ifname, O_RDWR|O_NONBLOCK));
- if (ctx.tunfd.fd < 0)
+ iface->fd = FASTD_POLL_FD(POLL_TYPE_IFACE, open(ifname, O_RDWR|O_NONBLOCK));
+ if (iface->fd.fd < 0)
exit_errno("could not open tun device file");
- ctx.ifname = fastd_strndup(conf.ifname, IFNAMSIZ-1);
+ iface->name = fastd_strndup(conf.ifname, IFNAMSIZ-1);
switch (conf.mode) {
case MODE_TAP:
- setup_tap();
+ setup_tap(iface);
break;
case MODE_TUN:
- setup_tun();
+ setup_tun(iface);
break;
default:
exit_bug("invalid mode");
}
- fastd_poll_fd_register(&ctx.tunfd);
+ fastd_poll_fd_register(&iface->fd);
pr_debug("tun device initialized.");
}
@@ -338,7 +338,7 @@ void fastd_tuntap_open(void) {
#elif __APPLE__
/** Opens the TUN/TAP device */
-void fastd_tuntap_open(void) {
+static void tuntap_open(fastd_iface_t *iface) {
const char *devtype;
switch (conf.mode) {
case MODE_TAP:
@@ -363,11 +363,11 @@ void fastd_tuntap_open(void) {
pr_debug("initializing tun device...");
- ctx.tunfd = FASTD_POLL_FD(POLL_TYPE_IFACE, open(ifname, O_RDWR|O_NONBLOCK));
- if (ctx.tunfd.fd < 0)
+ iface->fd = FASTD_POLL_FD(POLL_TYPE_IFACE, open(ifname, O_RDWR|O_NONBLOCK));
+ if (iface->fd.fd < 0)
exit_errno("could not open tun device file");
- ctx.ifname = fastd_strndup(conf.ifname, IFNAMSIZ-1);
+ iface->name = fastd_strndup(conf.ifname, IFNAMSIZ-1);
int ctl_sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
if (ctl_sock < 0)
@@ -382,7 +382,7 @@ void fastd_tuntap_open(void) {
if (close(ctl_sock))
pr_error_errno("close");
- fastd_poll_fd_register(&ctx.tunfd);
+ fastd_poll_fd_register(&iface->fd);
pr_debug("tun device initialized.");
}
@@ -395,7 +395,7 @@ void fastd_tuntap_open(void) {
/** Reads a packet from the TUN/TAP device */
-void fastd_tuntap_handle(void) {
+void fastd_tuntap_handle(fastd_iface_t *iface) {
size_t max_len = fastd_max_payload();
fastd_buffer_t buffer;
@@ -404,7 +404,7 @@ void fastd_tuntap_handle(void) {
else
buffer = fastd_buffer_alloc(max_len, conf.min_encrypt_head_space, conf.min_encrypt_tail_space);
- ssize_t len = read(ctx.tunfd.fd, buffer.data, max_len);
+ ssize_t len = read(iface->fd.fd, buffer.data, max_len);
if (len < 0)
exit_errno("read");
@@ -413,11 +413,11 @@ void fastd_tuntap_handle(void) {
if (multiaf_tun && conf.mode == MODE_TUN)
fastd_buffer_push_head(&buffer, 4);
- fastd_send_data(buffer, NULL);
+ fastd_send_data(buffer, iface->peer);
}
/** Writes a packet to the TUN/TAP device */
-void fastd_tuntap_write(fastd_buffer_t buffer) {
+void fastd_tuntap_write(fastd_iface_t *iface, fastd_buffer_t buffer) {
if (multiaf_tun && conf.mode == MODE_TUN) {
uint8_t version = *((uint8_t *)buffer.data) >> 4;
uint32_t af;
@@ -440,12 +440,24 @@ void fastd_tuntap_write(fastd_buffer_t buffer) {
memcpy(buffer.data, &af, 4);
}
- if (write(ctx.tunfd.fd, buffer.data, buffer.len) < 0)
+ if (write(iface->fd.fd, buffer.data, buffer.len) < 0)
pr_debug2_errno("write");
}
+fastd_iface_t * fastd_tuntap_open(fastd_peer_t *peer) {
+ fastd_iface_t *iface = fastd_new(fastd_iface_t);
+ iface->peer = peer;
+
+ tuntap_open(iface);
+
+ return iface;
+}
+
/** Closes the TUN/TAP device */
-void fastd_tuntap_close(void) {
- if (!fastd_poll_fd_close(&ctx.tunfd))
+void fastd_tuntap_close(fastd_iface_t *iface) {
+ if (!fastd_poll_fd_close(&iface->fd))
pr_warn_errno("closing tun/tap: close");
+
+ free(iface->name);
+ free(iface);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 09:31:37 +0200