| 257 | } |
| 258 | |
| 259 | static int |
| 260 | in6_gre_setup_socket(struct gre_softc *sc) |
| 261 | { |
| 262 | struct sockopt sopt; |
| 263 | struct sockaddr_in6 sin6; |
| 264 | struct in6_gre_socket *s; |
| 265 | struct gre_socket *gs; |
| 266 | int error, value; |
| 267 | |
| 268 | /* |
| 269 | * NOTE: we are protected with gre_ioctl_sx lock. |
| 270 | * |
| 271 | * First check that socket is already configured. |
| 272 | * If so, check that source addres was not changed. |
| 273 | * If address is different, check that there are no other tunnels |
| 274 | * and close socket. |
| 275 | */ |
| 276 | gs = sc->gre_so; |
| 277 | if (gs != NULL) { |
| 278 | s = __containerof(gs, struct in6_gre_socket, base); |
| 279 | if (!IN6_ARE_ADDR_EQUAL(&s->addr, &sc->gre_oip6.ip6_src)) { |
| 280 | if (CK_LIST_EMPTY(&gs->list)) { |
| 281 | CK_LIST_REMOVE(gs, chain); |
| 282 | soclose(gs->so); |
| 283 | NET_EPOCH_CALL(gre_sofree, &gs->epoch_ctx); |
| 284 | } |
| 285 | gs = sc->gre_so = NULL; |
| 286 | } |
| 287 | } |
| 288 | |
| 289 | if (gs == NULL) { |
| 290 | /* |
| 291 | * Check that socket for given address is already |
| 292 | * configured. |
| 293 | */ |
| 294 | gs = in6_gre_lookup_socket(&sc->gre_oip6.ip6_src); |
| 295 | if (gs == NULL) { |
| 296 | s = malloc(sizeof(*s), M_GRE, M_WAITOK | M_ZERO); |
| 297 | s->addr = sc->gre_oip6.ip6_src; |
| 298 | gs = &s->base; |
| 299 | |
| 300 | error = socreate(sc->gre_family, &gs->so, |
| 301 | SOCK_DGRAM, IPPROTO_UDP, curthread->td_ucred, |
| 302 | curthread); |
| 303 | if (error != 0) { |
| 304 | if_printf(GRE2IFP(sc), |
| 305 | "cannot create socket: %d\n", error); |
| 306 | free(s, M_GRE); |
| 307 | return (error); |
| 308 | } |
| 309 | |
| 310 | error = udp_set_kernel_tunneling(gs->so, |
| 311 | in6_gre_udp_input, NULL, gs); |
| 312 | if (error != 0) { |
| 313 | if_printf(GRE2IFP(sc), |
| 314 | "cannot set UDP tunneling: %d\n", error); |
| 315 | goto fail; |
| 316 | } |
no test coverage detected