1 /*
2 * libwebsockets - small server side websockets and web server implementation
3 *
4 * Copyright (C) 2010 - 2019 Andy Green <andy@warmcat.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 #include <private-lib-core.h>
26
27 static int
rops_handle_POLLIN_raw_file(struct lws_context_per_thread * pt,struct lws * wsi,struct lws_pollfd * pollfd)28 rops_handle_POLLIN_raw_file(struct lws_context_per_thread *pt, struct lws *wsi,
29 struct lws_pollfd *pollfd)
30 {
31 int n;
32
33 if (pollfd->revents & LWS_POLLOUT) {
34 n = lws_callback_as_writeable(wsi);
35 if (lws_change_pollfd(wsi, LWS_POLLOUT, 0)) {
36 lwsl_info("failed at set pollfd\n");
37 return LWS_HPI_RET_WSI_ALREADY_DIED;
38 }
39 if (n)
40 return LWS_HPI_RET_PLEASE_CLOSE_ME;
41 }
42
43 if (pollfd->revents & LWS_POLLIN) {
44 if (user_callback_handle_rxflow(wsi->protocol->callback,
45 wsi, LWS_CALLBACK_RAW_RX_FILE,
46 wsi->user_space, NULL, 0)) {
47 lwsl_debug("raw rx callback closed it\n");
48 return LWS_HPI_RET_PLEASE_CLOSE_ME;
49 }
50 }
51
52 if (pollfd->revents & LWS_POLLHUP)
53 if (!(pollfd->revents & LWS_POLLIN))
54 return LWS_HPI_RET_PLEASE_CLOSE_ME;
55
56 return LWS_HPI_RET_HANDLED;
57 }
58
59 static int
rops_adoption_bind_raw_file(struct lws * wsi,int type,const char * vh_prot_name)60 rops_adoption_bind_raw_file(struct lws *wsi, int type, const char *vh_prot_name)
61 {
62 /* no socket or http: it can only be a raw file */
63 if ((type & LWS_ADOPT_HTTP) || (type & LWS_ADOPT_SOCKET) ||
64 (type & _LWS_ADOPT_FINISH))
65 return 0; /* no match */
66
67 lws_role_transition(wsi, 0, LRS_ESTABLISHED, &role_ops_raw_file);
68
69 if (!vh_prot_name) {
70 if (wsi->vhost->default_protocol_index >=
71 wsi->vhost->count_protocols)
72 return 0;
73
74 wsi->protocol = &wsi->vhost->protocols[
75 wsi->vhost->default_protocol_index];
76 }
77
78 return 1; /* bound */
79 }
80
81 const struct lws_role_ops role_ops_raw_file = {
82 /* role name */ "raw-file",
83 /* alpn id */ NULL,
84 /* check_upgrades */ NULL,
85 /* pt_init_destroy */ NULL,
86 /* init_vhost */ NULL,
87 /* destroy_vhost */ NULL,
88 /* service_flag_pending */ NULL,
89 /* handle_POLLIN */ rops_handle_POLLIN_raw_file,
90 /* handle_POLLOUT */ NULL,
91 /* perform_user_POLLOUT */ NULL,
92 /* callback_on_writable */ NULL,
93 /* tx_credit */ NULL,
94 /* write_role_protocol */ NULL,
95 /* encapsulation_parent */ NULL,
96 /* alpn_negotiated */ NULL,
97 /* close_via_role_protocol */ NULL,
98 /* close_role */ NULL,
99 /* close_kill_connection */ NULL,
100 /* destroy_role */ NULL,
101 /* adoption_bind */ rops_adoption_bind_raw_file,
102 /* client_bind */ NULL,
103 /* issue_keepalive */ NULL,
104 /* adoption_cb clnt, srv */ { LWS_CALLBACK_RAW_ADOPT_FILE,
105 LWS_CALLBACK_RAW_ADOPT_FILE },
106 /* rx_cb clnt, srv */ { LWS_CALLBACK_RAW_RX_FILE,
107 LWS_CALLBACK_RAW_RX_FILE },
108 /* writeable cb clnt, srv */ { LWS_CALLBACK_RAW_WRITEABLE_FILE,
109 LWS_CALLBACK_RAW_WRITEABLE_FILE},
110 /* close cb clnt, srv */ { LWS_CALLBACK_RAW_CLOSE_FILE,
111 LWS_CALLBACK_RAW_CLOSE_FILE},
112 /* protocol_bind cb c, srv */ { LWS_CALLBACK_RAW_FILE_BIND_PROTOCOL,
113 LWS_CALLBACK_RAW_FILE_BIND_PROTOCOL },
114 /* protocol_unbind cb c, srv */ { LWS_CALLBACK_RAW_FILE_DROP_PROTOCOL,
115 LWS_CALLBACK_RAW_FILE_DROP_PROTOCOL },
116 /* file_handle */ 1,
117 };
118