* Transform old in6_pcbconnect() into an inner subroutine for new * in6_pcbconnect(): Do some validity-checking on the remote * address (in mbuf 'nam') and then determine local host address * (i.e., which interface) to use to access that remote host. * * This preserves definition of in6_pcbconnect(), while supporting a * slightly different version for T/TCP. (This is more than
| 345 | * have forced minor changes in every protocol). |
| 346 | */ |
| 347 | static int |
| 348 | in6_pcbladdr(struct inpcb *inp, struct sockaddr *nam, |
| 349 | struct in6_addr *plocal_addr6) |
| 350 | { |
| 351 | struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam; |
| 352 | int error = 0; |
| 353 | int scope_ambiguous = 0; |
| 354 | struct in6_addr in6a; |
| 355 | |
| 356 | INP_WLOCK_ASSERT(inp); |
| 357 | INP_HASH_WLOCK_ASSERT(inp->inp_pcbinfo); /* XXXRW: why? */ |
| 358 | |
| 359 | if (nam->sa_len != sizeof (*sin6)) |
| 360 | return (EINVAL); |
| 361 | if (sin6->sin6_family != AF_INET6) |
| 362 | return (EAFNOSUPPORT); |
| 363 | if (sin6->sin6_port == 0) |
| 364 | return (EADDRNOTAVAIL); |
| 365 | |
| 366 | if (sin6->sin6_scope_id == 0 && !V_ip6_use_defzone) |
| 367 | scope_ambiguous = 1; |
| 368 | if ((error = sa6_embedscope(sin6, V_ip6_use_defzone)) != 0) |
| 369 | return(error); |
| 370 | |
| 371 | if (!CK_STAILQ_EMPTY(&V_in6_ifaddrhead)) { |
| 372 | /* |
| 373 | * If the destination address is UNSPECIFIED addr, |
| 374 | * use the loopback addr, e.g ::1. |
| 375 | */ |
| 376 | if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) |
| 377 | sin6->sin6_addr = in6addr_loopback; |
| 378 | } |
| 379 | if ((error = prison_remote_ip6(inp->inp_cred, &sin6->sin6_addr)) != 0) |
| 380 | return (error); |
| 381 | |
| 382 | error = in6_selectsrc_socket(sin6, inp->in6p_outputopts, |
| 383 | inp, inp->inp_cred, scope_ambiguous, &in6a, NULL); |
| 384 | if (error) |
| 385 | return (error); |
| 386 | |
| 387 | /* |
| 388 | * Do not update this earlier, in case we return with an error. |
| 389 | * |
| 390 | * XXX: this in6_selectsrc_socket result might replace the bound local |
| 391 | * address with the address specified by setsockopt(IPV6_PKTINFO). |
| 392 | * Is it the intended behavior? |
| 393 | */ |
| 394 | *plocal_addr6 = in6a; |
| 395 | |
| 396 | /* |
| 397 | * Don't do pcblookup call here; return interface in |
| 398 | * plocal_addr6 |
| 399 | * and exit to caller, that will do the lookup. |
| 400 | */ |
| 401 | |
| 402 | return (0); |
| 403 | } |
| 404 |
no test coverage detected