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Diffstat (limited to 'src/mhd/mhd_run.c')
-rw-r--r-- | src/mhd/mhd_run.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/mhd/mhd_run.c b/src/mhd/mhd_run.c new file mode 100644 index 000000000..8a3c369b9 --- /dev/null +++ b/src/mhd/mhd_run.c | |||
@@ -0,0 +1,174 @@ | |||
1 | /* | ||
2 | This file is part of TALER | ||
3 | Copyright (C) 2019-2021 Taler Systems SA | ||
4 | |||
5 | TALER is free software; you can redistribute it and/or modify it under the | ||
6 | terms of the GNU Affero General Public License as published by the Free Software | ||
7 | Foundation; either version 3, or (at your option) any later version. | ||
8 | |||
9 | TALER is distributed in the hope that it will be useful, but WITHOUT ANY | ||
10 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR | ||
11 | A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. | ||
12 | |||
13 | You should have received a copy of the GNU Affero General Public License along with | ||
14 | TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> | ||
15 | */ | ||
16 | /** | ||
17 | * @file mhd_run.c | ||
18 | * @brief API for running an MHD daemon with the | ||
19 | * GNUnet scheduler | ||
20 | * @author Christian Grothoff | ||
21 | */ | ||
22 | #include "platform.h" | ||
23 | #include <gnunet/gnunet_util_lib.h> | ||
24 | #include <gnunet/gnunet_json_lib.h> | ||
25 | #include <jansson.h> | ||
26 | #include <microhttpd.h> | ||
27 | #include "taler_util.h" | ||
28 | #include "taler_mhd_lib.h" | ||
29 | |||
30 | |||
31 | /** | ||
32 | * Set if we should immediately #MHD_run again. | ||
33 | */ | ||
34 | static int triggered; | ||
35 | |||
36 | /** | ||
37 | * Task running the HTTP server. | ||
38 | */ | ||
39 | static struct GNUNET_SCHEDULER_Task *mhd_task; | ||
40 | |||
41 | /** | ||
42 | * The MHD daemon we are running. | ||
43 | */ | ||
44 | static struct MHD_Daemon *mhd; | ||
45 | |||
46 | |||
47 | /** | ||
48 | * Function that queries MHD's select sets and | ||
49 | * starts the task waiting for them. | ||
50 | */ | ||
51 | static struct GNUNET_SCHEDULER_Task * | ||
52 | prepare_daemon (void); | ||
53 | |||
54 | |||
55 | /** | ||
56 | * Call MHD to process pending requests and then go back | ||
57 | * and schedule the next run. | ||
58 | * | ||
59 | * @param cls NULL | ||
60 | */ | ||
61 | static void | ||
62 | run_daemon (void *cls) | ||
63 | { | ||
64 | mhd_task = NULL; | ||
65 | do { | ||
66 | triggered = 0; | ||
67 | GNUNET_assert (MHD_YES == | ||
68 | MHD_run (mhd)); | ||
69 | } while (0 != triggered); | ||
70 | mhd_task = prepare_daemon (); | ||
71 | } | ||
72 | |||
73 | |||
74 | /** | ||
75 | * Function that queries MHD's select sets and starts the task waiting for | ||
76 | * them. | ||
77 | * | ||
78 | * @return task handle for the MHD task. | ||
79 | */ | ||
80 | static struct GNUNET_SCHEDULER_Task * | ||
81 | prepare_daemon (void) | ||
82 | { | ||
83 | struct GNUNET_SCHEDULER_Task *ret; | ||
84 | fd_set rs; | ||
85 | fd_set ws; | ||
86 | fd_set es; | ||
87 | struct GNUNET_NETWORK_FDSet *wrs; | ||
88 | struct GNUNET_NETWORK_FDSet *wws; | ||
89 | int max; | ||
90 | MHD_UNSIGNED_LONG_LONG timeout; | ||
91 | int haveto; | ||
92 | struct GNUNET_TIME_Relative tv; | ||
93 | |||
94 | FD_ZERO (&rs); | ||
95 | FD_ZERO (&ws); | ||
96 | FD_ZERO (&es); | ||
97 | wrs = GNUNET_NETWORK_fdset_create (); | ||
98 | wws = GNUNET_NETWORK_fdset_create (); | ||
99 | max = -1; | ||
100 | GNUNET_assert (MHD_YES == | ||
101 | MHD_get_fdset (mhd, | ||
102 | &rs, | ||
103 | &ws, | ||
104 | &es, | ||
105 | &max)); | ||
106 | haveto = MHD_get_timeout (mhd, | ||
107 | &timeout); | ||
108 | if (haveto == MHD_YES) | ||
109 | tv = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, | ||
110 | timeout); | ||
111 | else | ||
112 | tv = GNUNET_TIME_UNIT_FOREVER_REL; | ||
113 | GNUNET_NETWORK_fdset_copy_native (wrs, | ||
114 | &rs, | ||
115 | max + 1); | ||
116 | GNUNET_NETWORK_fdset_copy_native (wws, | ||
117 | &ws, | ||
118 | max + 1); | ||
119 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
120 | "Adding run_daemon select task\n"); | ||
121 | ret = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH, | ||
122 | tv, | ||
123 | wrs, | ||
124 | wws, | ||
125 | &run_daemon, | ||
126 | NULL); | ||
127 | GNUNET_NETWORK_fdset_destroy (wrs); | ||
128 | GNUNET_NETWORK_fdset_destroy (wws); | ||
129 | return ret; | ||
130 | } | ||
131 | |||
132 | |||
133 | void | ||
134 | TALER_MHD_daemon_start (struct MHD_Daemon *daemon) | ||
135 | { | ||
136 | GNUNET_assert (NULL == mhd); | ||
137 | mhd = daemon; | ||
138 | mhd_task = prepare_daemon (); | ||
139 | } | ||
140 | |||
141 | |||
142 | struct MHD_Daemon * | ||
143 | TALER_MHD_daemon_stop (void) | ||
144 | { | ||
145 | struct MHD_Daemon *ret; | ||
146 | |||
147 | if (NULL != mhd_task) | ||
148 | { | ||
149 | GNUNET_SCHEDULER_cancel (mhd_task); | ||
150 | mhd_task = NULL; | ||
151 | } | ||
152 | ret = mhd; | ||
153 | mhd = NULL; | ||
154 | return ret; | ||
155 | } | ||
156 | |||
157 | |||
158 | void | ||
159 | TALER_MHD_daemon_trigger (void) | ||
160 | { | ||
161 | if (NULL != mhd_task) | ||
162 | { | ||
163 | GNUNET_SCHEDULER_cancel (mhd_task); | ||
164 | mhd_task = NULL; | ||
165 | run_daemon (NULL); | ||
166 | } | ||
167 | else | ||
168 | { | ||
169 | triggered = 1; | ||
170 | } | ||
171 | } | ||
172 | |||
173 | |||
174 | /* end of mhd_run.c */ | ||