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author | Christian Grothoff <christian@grothoff.org> | 2016-07-08 12:53:38 +0000 |
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committer | Christian Grothoff <christian@grothoff.org> | 2016-07-08 12:53:38 +0000 |
commit | 837043ed07163a8654827676602f30b9132ff4d0 (patch) | |
tree | 03ddb1da10063ef0f212a3dd81e1c93d720a3075 /src/transport/transport_api_offer_hello.c | |
parent | c157d10c526ce74e4d26de4255740e7a99cff08b (diff) | |
download | gnunet-837043ed07163a8654827676602f30b9132ff4d0.tar.gz gnunet-837043ed07163a8654827676602f30b9132ff4d0.zip |
towards factoring out HELLO handling from transport_api.c
Diffstat (limited to 'src/transport/transport_api_offer_hello.c')
-rw-r--r-- | src/transport/transport_api_offer_hello.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/transport/transport_api_offer_hello.c b/src/transport/transport_api_offer_hello.c new file mode 100644 index 000000000..0abce2d62 --- /dev/null +++ b/src/transport/transport_api_offer_hello.c | |||
@@ -0,0 +1,149 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2009-2013, 2016 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software; you can redistribute it and/or modify | ||
6 | it under the terms of the GNU General Public License as published | ||
7 | by the Free Software Foundation; either version 3, or (at your | ||
8 | option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU General Public License | ||
16 | along with GNUnet; see the file COPYING. If not, write to the | ||
17 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | ||
18 | Boston, MA 02110-1301, USA. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file transport/transport_api_offer_hello.c | ||
23 | * @brief library to offer HELLOs to transport service | ||
24 | * @author Christian Grothoff | ||
25 | */ | ||
26 | |||
27 | /** | ||
28 | * Entry in linked list for all offer-HELLO requests. | ||
29 | */ | ||
30 | struct GNUNET_TRANSPORT_OfferHelloHandle | ||
31 | { | ||
32 | /** | ||
33 | * For the DLL. | ||
34 | */ | ||
35 | struct GNUNET_TRANSPORT_OfferHelloHandle *prev; | ||
36 | |||
37 | /** | ||
38 | * For the DLL. | ||
39 | */ | ||
40 | struct GNUNET_TRANSPORT_OfferHelloHandle *next; | ||
41 | |||
42 | /** | ||
43 | * Transport service handle we use for transmission. | ||
44 | */ | ||
45 | struct GNUNET_TRANSPORT_Handle *th; | ||
46 | |||
47 | /** | ||
48 | * Transmission handle for this request. | ||
49 | */ | ||
50 | struct GNUNET_TRANSPORT_TransmitHandle *tth; | ||
51 | |||
52 | /** | ||
53 | * Function to call once we are done. | ||
54 | */ | ||
55 | GNUNET_SCHEDULER_TaskCallback cont; | ||
56 | |||
57 | /** | ||
58 | * Closure for @e cont | ||
59 | */ | ||
60 | void *cls; | ||
61 | |||
62 | /** | ||
63 | * The HELLO message to be transmitted. | ||
64 | */ | ||
65 | struct GNUNET_MessageHeader *msg; | ||
66 | }; | ||
67 | |||
68 | |||
69 | |||
70 | /** | ||
71 | * Offer the transport service the HELLO of another peer. Note that | ||
72 | * the transport service may just ignore this message if the HELLO is | ||
73 | * malformed or useless due to our local configuration. | ||
74 | * | ||
75 | * @param handle connection to transport service | ||
76 | * @param hello the hello message | ||
77 | * @param cont continuation to call when HELLO has been sent, | ||
78 | * tc reason #GNUNET_SCHEDULER_REASON_TIMEOUT for fail | ||
79 | * tc reasong #GNUNET_SCHEDULER_REASON_READ_READY for success | ||
80 | * @param cont_cls closure for @a cont | ||
81 | * @return a `struct GNUNET_TRANSPORT_OfferHelloHandle` handle or NULL on failure, | ||
82 | * in case of failure @a cont will not be called | ||
83 | * | ||
84 | */ | ||
85 | struct GNUNET_TRANSPORT_OfferHelloHandle * | ||
86 | GNUNET_TRANSPORT_offer_hello (struct GNUNET_TRANSPORT_Handle *handle, | ||
87 | const struct GNUNET_MessageHeader *hello, | ||
88 | GNUNET_SCHEDULER_TaskCallback cont, | ||
89 | void *cont_cls) | ||
90 | { | ||
91 | struct GNUNET_TRANSPORT_OfferHelloHandle *ohh; | ||
92 | struct GNUNET_MessageHeader *msg; | ||
93 | struct GNUNET_PeerIdentity peer; | ||
94 | uint16_t size; | ||
95 | |||
96 | if (NULL == handle->mq) | ||
97 | return NULL; | ||
98 | GNUNET_break (ntohs (hello->type) == GNUNET_MESSAGE_TYPE_HELLO); | ||
99 | size = ntohs (hello->size); | ||
100 | GNUNET_break (size >= sizeof (struct GNUNET_MessageHeader)); | ||
101 | if (GNUNET_OK != | ||
102 | GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message *) hello, | ||
103 | &peer)) | ||
104 | { | ||
105 | GNUNET_break (0); | ||
106 | return NULL; | ||
107 | } | ||
108 | |||
109 | msg = GNUNET_malloc (size); | ||
110 | memcpy (msg, hello, size); | ||
111 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
112 | "Offering HELLO message of `%s' to transport for validation.\n", | ||
113 | GNUNET_i2s (&peer)); | ||
114 | ohh = GNUNET_new (struct GNUNET_TRANSPORT_OfferHelloHandle); | ||
115 | ohh->th = handle; | ||
116 | ohh->cont = cont; | ||
117 | ohh->cls = cont_cls; | ||
118 | ohh->msg = msg; | ||
119 | ohh->tth = schedule_control_transmit (handle, | ||
120 | size, | ||
121 | &send_hello, | ||
122 | ohh); | ||
123 | GNUNET_CONTAINER_DLL_insert (handle->oh_head, | ||
124 | handle->oh_tail, | ||
125 | ohh); | ||
126 | return ohh; | ||
127 | } | ||
128 | |||
129 | |||
130 | /** | ||
131 | * Cancel the request to transport to offer the HELLO message | ||
132 | * | ||
133 | * @param ohh the handle for the operation to cancel | ||
134 | */ | ||
135 | void | ||
136 | GNUNET_TRANSPORT_offer_hello_cancel (struct GNUNET_TRANSPORT_OfferHelloHandle *ohh) | ||
137 | { | ||
138 | struct GNUNET_TRANSPORT_Handle *th = ohh->th; | ||
139 | |||
140 | cancel_control_transmit (ohh->th, ohh->tth); | ||
141 | GNUNET_CONTAINER_DLL_remove (th->oh_head, | ||
142 | th->oh_tail, | ||
143 | ohh); | ||
144 | GNUNET_free (ohh->msg); | ||
145 | GNUNET_free (ohh); | ||
146 | } | ||
147 | |||
148 | |||
149 | /* end of transport_api_offer_hello.c */ | ||