diff options
Diffstat (limited to 'src/fastd.c')
| -rw-r--r-- | src/fastd.c | 174 |
1 files changed, 2 insertions, 172 deletions
diff --git a/src/fastd.c b/src/fastd.c index b0901f9..10dbeec 100644 --- a/src/fastd.c +++ b/src/fastd.c @@ -191,176 +191,6 @@ static void init_sockets(fastd_context_t *ctx) { ctx->n_socks = ctx->conf->n_bind_addrs; } -static int bind_socket(fastd_context_t *ctx, const fastd_bind_address_t *addr, bool warn) { - int fd = -1; - int af = AF_UNSPEC; - - if (addr->addr.sa.sa_family != AF_INET) { - fd = socket(PF_INET6, SOCK_DGRAM, IPPROTO_UDP); - if (fd >= 0) { - af = AF_INET6; - - int val = (addr->addr.sa.sa_family == AF_INET6); - if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &val, sizeof(val))) { - if (warn) - pr_warn_errno(ctx, "setsockopt"); - goto error; - } - } - } - if (fd < 0 && addr->addr.sa.sa_family != AF_INET6) { - fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP); - if (fd < 0) - exit_errno(ctx, "unable to create socket"); - else - af = AF_INET; - } - - if (fd < 0) - goto error; - - fastd_setfd(ctx, fd, FD_CLOEXEC, 0); - fastd_setfl(ctx, fd, O_NONBLOCK, 0); - - int one = 1; - if (setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &one, sizeof(one))) { - pr_error_errno(ctx, "setsockopt: unable to set IP_PKTINFO"); - goto error; - } - - if (af == AF_INET6) { - if (setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &one, sizeof(one))) { - pr_error_errno(ctx, "setsockopt: unable to set IPV6_RECVPKTINFO"); - goto error; - } - } - - if (addr->bindtodev) { - if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, addr->bindtodev, strlen(addr->bindtodev))) { - if (warn) - pr_warn_errno(ctx, "setsockopt: unable to bind to device"); - goto error; - } - } - - if (ctx->conf->pmtu.set) { - int pmtu = ctx->conf->pmtu.state ? IP_PMTUDISC_DO : IP_PMTUDISC_DONT; - if (setsockopt(fd, IPPROTO_IP, IP_MTU_DISCOVER, &pmtu, sizeof(pmtu))) { - pr_error_errno(ctx, "setsockopt: unable to set PMTU discovery"); - goto error; - } - } - - fastd_peer_address_t bind_address = addr->addr; - - if (bind_address.sa.sa_family == AF_UNSPEC) { - memset(&bind_address, 0, sizeof(bind_address)); - bind_address.sa.sa_family = af; - - if (af == AF_INET6) - bind_address.in6.sin6_port = addr->addr.in.sin_port; - else - bind_address.in.sin_port = addr->addr.in.sin_port; - } - - if (bind(fd, (struct sockaddr*)&bind_address, bind_address.sa.sa_family == AF_INET6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in))) { - if (warn) - pr_warn_errno(ctx, "bind"); - goto error; - } - - return fd; - - error: - if (fd >= 0) { - if (close(fd)) - pr_error_errno(ctx, "close"); - } - - if (warn) { - if (addr->bindtodev) - pr_warn(ctx, "unable to bind to %B on `%s'", &addr->addr, addr->bindtodev); - else - pr_warn(ctx, "unable to bind to %B", &addr->addr); - } - - return -1; -} - -static bool set_bound_address(fastd_context_t *ctx, fastd_socket_t *sock) { - fastd_peer_address_t addr = {}; - socklen_t len = sizeof(addr); - - if (getsockname(sock->fd, &addr.sa, &len) < 0) { - pr_error_errno(ctx, "getsockname"); - return false; - } - - if (len > sizeof(addr)) { - pr_error(ctx, "getsockname: got strange long address"); - return false; - } - - sock->bound_addr = calloc(1, sizeof(addr)); - *sock->bound_addr = addr; - - return true; -} - -static bool bind_sockets(fastd_context_t *ctx) { - unsigned i; - - for (i = 0; i < ctx->n_socks; i++) { - if (ctx->socks[i].fd >= 0) - continue; - - ctx->socks[i].fd = bind_socket(ctx, ctx->socks[i].addr, ctx->socks[i].fd < -1); - - if (ctx->socks[i].fd >= 0) { - if (!set_bound_address(ctx, &ctx->socks[i])) { - fastd_socket_close(ctx, &ctx->socks[i]); - continue; - } - - fastd_peer_address_t bound_addr = *ctx->socks[i].bound_addr; - if (!ctx->socks[i].addr->addr.sa.sa_family) - bound_addr.sa.sa_family = AF_UNSPEC; - - if (ctx->socks[i].addr->bindtodev) - pr_info(ctx, "successfully bound to %B on `%s'", &bound_addr, ctx->socks[i].addr->bindtodev); - else - pr_info(ctx, "successfully bound to %B", &bound_addr); - } - } - - if ((ctx->sock_default_v4 && ctx->sock_default_v4->fd < 0) || (ctx->sock_default_v6 && ctx->sock_default_v6->fd < 0)) - return false; - - return true; -} - -fastd_socket_t* fastd_socket_open(fastd_context_t *ctx, fastd_peer_t *peer, int af) { - const fastd_bind_address_t any_address = { .addr.sa.sa_family = af }; - - int fd = bind_socket(ctx, &any_address, true); - if (fd < 0) - return NULL; - - fastd_socket_t *sock = malloc(sizeof(fastd_socket_t)); - - sock->fd = fd; - sock->addr = NULL; - sock->bound_addr = NULL; - sock->peer = peer; - - if (!set_bound_address(ctx, sock)) { - fastd_socket_close(ctx, sock); - free(sock); - return NULL; - } - - return sock; -} void fastd_setfd(const fastd_context_t *ctx, int fd, int set, int unset) { int flags = fcntl(fd, F_GETFD); @@ -1206,7 +1036,7 @@ static void maintenance(fastd_context_t *ctx) { cleanup_peers(ctx); fastd_peer_eth_addr_cleanup(ctx); - bind_sockets(ctx); + fastd_socket_handle_binds(ctx); } @@ -1339,7 +1169,7 @@ int main(int argc, char *argv[]) { init_sockets(&ctx); - if (!bind_sockets(&ctx)) + if (!fastd_socket_handle_binds(&ctx)) exit_error(&ctx, "unable to bind default socket"); init_tuntap(&ctx); |