diff options
Diffstat (limited to 'source3/libsmb')
| -rw-r--r-- | source3/libsmb/namequery.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/source3/libsmb/namequery.c b/source3/libsmb/namequery.c index ecb984d2aa..28fc33e32b 100644 --- a/source3/libsmb/namequery.c +++ b/source3/libsmb/namequery.c @@ -1946,6 +1946,183 @@ static NTSTATUS query_wins_list_recv(struct tevent_req *req, return NT_STATUS_OK; } +struct resolve_wins_state { + int num_sent; + int num_received; + + struct sockaddr_storage *addrs; + int num_addrs; + uint8_t flags; +}; + +static void resolve_wins_done(struct tevent_req *subreq); + +struct tevent_req *resolve_wins_send(TALLOC_CTX *mem_ctx, + struct tevent_context *ev, + const char *name, + int name_type) +{ + struct tevent_req *req, *subreq; + struct resolve_wins_state *state; + char **wins_tags = NULL; + struct sockaddr_storage src_ss; + struct in_addr src_ip; + int i, num_wins_tags; + + req = tevent_req_create(mem_ctx, &state, + struct resolve_wins_state); + if (req == NULL) { + return NULL; + } + + if (wins_srv_count() < 1) { + DEBUG(3,("resolve_wins: WINS server resolution selected " + "and no WINS servers listed.\n")); + tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); + goto fail; + } + + /* the address we will be sending from */ + if (!interpret_string_addr(&src_ss, lp_socket_address(), + AI_NUMERICHOST|AI_PASSIVE)) { + zero_sockaddr(&src_ss); + } + + if (src_ss.ss_family != AF_INET) { + char addr[INET6_ADDRSTRLEN]; + print_sockaddr(addr, sizeof(addr), &src_ss); + DEBUG(3,("resolve_wins: cannot receive WINS replies " + "on IPv6 address %s\n", + addr)); + tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); + goto fail; + } + + src_ip = ((const struct sockaddr_in *)(void *)&src_ss)->sin_addr; + + wins_tags = wins_srv_tags(); + if (wins_tags == NULL) { + tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER); + goto fail; + } + + num_wins_tags = 0; + while (wins_tags[num_wins_tags] != NULL) { + num_wins_tags += 1; + } + + for (i=0; i<num_wins_tags; i++) { + int num_servers, num_alive; + struct in_addr *servers, *alive; + int j; + + if (!wins_server_tag_ips(wins_tags[i], talloc_tos(), + &servers, &num_servers)) { + DEBUG(10, ("wins_server_tag_ips failed for tag %s\n", + wins_tags[i])); + continue; + } + + alive = talloc_array(state, struct in_addr, num_servers); + if (tevent_req_nomem(alive, req)) { + goto fail; + } + + num_alive = 0; + for (j=0; j<num_servers; j++) { + struct in_addr wins_ip = servers[j]; + + if (global_in_nmbd && ismyip_v4(wins_ip)) { + /* yikes! we'll loop forever */ + continue; + } + /* skip any that have been unresponsive lately */ + if (wins_srv_is_dead(wins_ip, src_ip)) { + continue; + } + DEBUG(3, ("resolve_wins: using WINS server %s " + "and tag '%s'\n", + inet_ntoa(wins_ip), wins_tags[i])); + alive[num_alive] = wins_ip; + num_alive += 1; + } + TALLOC_FREE(servers); + + if (num_alive == 0) { + continue; + } + + subreq = query_wins_list_send( + state, ev, src_ip, name, name_type, + alive, num_alive); + if (tevent_req_nomem(subreq, req)) { + goto fail; + } + tevent_req_set_callback(subreq, resolve_wins_done, req); + state->num_sent += 1; + } + + if (state->num_sent == 0) { + tevent_req_nterror(req, NT_STATUS_NOT_FOUND); + goto fail; + } + + wins_srv_tags_free(wins_tags); + return req; +fail: + wins_srv_tags_free(wins_tags); + return tevent_req_post(req, ev); +} + +static void resolve_wins_done(struct tevent_req *subreq) +{ + struct tevent_req *req = tevent_req_callback_data( + subreq, struct tevent_req); + struct resolve_wins_state *state = tevent_req_data( + req, struct resolve_wins_state); + NTSTATUS status; + + status = query_wins_list_recv(subreq, state, &state->addrs, + &state->num_addrs, &state->flags); + if (NT_STATUS_IS_OK(status)) { + tevent_req_done(req); + return; + } + + state->num_received += 1; + + if (state->num_received < state->num_sent) { + /* + * Wait for the others + */ + return; + } + tevent_req_nterror(req, status); +} + +NTSTATUS resolve_wins_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx, + struct sockaddr_storage **addrs, + int *num_addrs, uint8_t *flags) +{ + struct resolve_wins_state *state = tevent_req_data( + req, struct resolve_wins_state); + NTSTATUS status; + + if (tevent_req_is_nterror(req, &status)) { + return status; + } + if (addrs != NULL) { + *addrs = talloc_move(mem_ctx, &state->addrs); + } + if (num_addrs != NULL) { + *num_addrs = state->num_addrs; + } + if (flags != NULL) { + *flags = state->flags; + } + return NT_STATUS_OK; +} + /******************************************************** Resolve via "wins" method. *********************************************************/ |