| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 |
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| 4 | broadcast name resolution module
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| 5 |
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| 6 | Copyright (C) Andrew Tridgell 1994-1998,2005
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| 7 | Copyright (C) Jeremy Allison 2007
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| 8 | Copyright (C) Jelmer Vernooij 2007
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| 9 | Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009-2014
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| 10 | This program is free software; you can redistribute it and/or modify
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| 11 | it under the terms of the GNU General Public License as published by
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| 12 | the Free Software Foundation; either version 3 of the License, or
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| 13 | (at your option) any later version.
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| 14 |
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| 15 | This program is distributed in the hope that it will be useful,
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| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | GNU General Public License for more details.
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| 19 |
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| 20 | You should have received a copy of the GNU General Public License
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| 21 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 22 | */
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| 23 |
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| 24 | #include "includes.h"
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| 25 | #include "libcli/composite/composite.h"
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| 26 | #include "libcli/resolve/resolve.h"
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| 27 | #include "lib/socket/socket.h"
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| 28 | #include "system/network.h"
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| 29 | #include "lib/socket/netif.h"
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| 30 | #include "param/param.h"
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| 31 | #include "lib/util/util_net.h"
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| 32 | #include "libcli/nbt/libnbt.h"
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| 33 | #include "dynconfig.h"
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| 34 |
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| 35 | struct resolve_lmhosts_state {
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| 36 | struct socket_address **addrs;
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| 37 | char **names;
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| 38 | };
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| 39 |
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| 40 | /**
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| 41 | broadcast name resolution method - async send
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| 42 | */
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| 43 | /*
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| 44 | general name resolution - async send
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| 45 | */
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| 46 | struct composite_context *resolve_name_lmhosts_send(TALLOC_CTX *mem_ctx,
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| 47 | struct tevent_context *event_ctx,
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| 48 | void *userdata, uint32_t flags,
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| 49 | uint16_t port,
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| 50 | struct nbt_name *name)
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| 51 | {
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| 52 | struct composite_context *c;
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| 53 | struct resolve_lmhosts_state *state;
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| 54 | struct sockaddr_storage *resolved_iplist;
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| 55 | int resolved_count, i;
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| 56 |
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| 57 | if (event_ctx == NULL) {
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| 58 | return NULL;
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| 59 | }
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| 60 |
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| 61 | c = composite_create(mem_ctx, event_ctx);
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| 62 | if (c == NULL) return NULL;
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| 63 |
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| 64 | if (composite_nomem(c->event_ctx, c)) return c;
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| 65 |
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| 66 | state = talloc_zero(c, struct resolve_lmhosts_state);
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| 67 | if (composite_nomem(state, c)) return c;
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| 68 | c->private_data = state;
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| 69 |
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| 70 | c->status = resolve_lmhosts_file_as_sockaddr(dyn_LMHOSTSFILE, name->name, name->type,
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| 71 | state, &resolved_iplist, &resolved_count);
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| 72 | if (!composite_is_ok(c)) return c;
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| 73 |
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| 74 | for (i=0; i < resolved_count; i++) {
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| 75 | state->addrs = talloc_realloc(state, state->addrs, struct socket_address *, i+2);
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| 76 | if (composite_nomem(state->addrs, c)) return c;
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| 77 |
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| 78 | set_sockaddr_port((struct sockaddr *)&resolved_iplist[i], port);
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| 79 |
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| 80 | state->addrs[i] = socket_address_from_sockaddr(state->addrs, (struct sockaddr *)&resolved_iplist[i], sizeof(resolved_iplist[i]));
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| 81 | if (composite_nomem(state->addrs[i], c)) return c;
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| 82 |
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| 83 | state->addrs[i+1] = NULL;
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| 84 |
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| 85 |
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| 86 | state->names = talloc_realloc(state, state->names, char *, i+2);
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| 87 | if (composite_nomem(state->addrs, c)) return c;
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| 88 |
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| 89 | state->names[i] = talloc_strdup(state->names, name->name);
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| 90 | if (composite_nomem(state->names[i], c)) return c;
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| 91 |
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| 92 | state->names[i+1] = NULL;
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| 93 |
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| 94 | i++;
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| 95 | }
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| 96 |
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| 97 | composite_done(c);
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| 98 | return c;
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| 99 | }
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| 100 |
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| 101 | /*
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| 102 | general name resolution method - recv side
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| 103 | */
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| 104 | NTSTATUS resolve_name_lmhosts_recv(struct composite_context *c,
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| 105 | TALLOC_CTX *mem_ctx,
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| 106 | struct socket_address ***addrs,
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| 107 | char ***names)
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| 108 | {
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| 109 | NTSTATUS status;
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| 110 |
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| 111 | status = composite_wait(c);
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| 112 |
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| 113 | if (NT_STATUS_IS_OK(status)) {
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| 114 | struct resolve_lmhosts_state *state = talloc_get_type(c->private_data, struct resolve_lmhosts_state);
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| 115 | *addrs = talloc_steal(mem_ctx, state->addrs);
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| 116 | if (names) {
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| 117 | *names = talloc_steal(mem_ctx, state->names);
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| 118 | }
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| 119 | }
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| 120 |
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| 121 | talloc_free(c);
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| 122 | return status;
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| 123 | }
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| 124 |
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| 125 |
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| 126 | bool resolve_context_add_lmhosts_method(struct resolve_context *ctx)
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| 127 | {
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| 128 | return resolve_context_add_method(ctx, resolve_name_lmhosts_send, resolve_name_lmhosts_recv, NULL);
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| 129 | }
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