GNUnet  0.10.x
identity_api_suffix_lookup.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2013 GNUnet e.V.
4 
5  GNUnet is free software: you can redistribute it and/or modify it
6  under the terms of the GNU Affero General Public License as published
7  by the Free Software Foundation, either version 3 of the License,
8  or (at your 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  Affero General Public License for more details.
14 
15  You should have received a copy of the GNU Affero General Public License
16  along with this program. If not, see <http://www.gnu.org/licenses/>.
17 
18  SPDX-License-Identifier: AGPL3.0-or-later
19  */
20 
26 #include "platform.h"
27 #include "gnunet_util_lib.h"
29 #include "identity.h"
30 
31 #define LOG(kind, ...) GNUNET_log_from(kind, "identity-api", __VA_ARGS__)
32 
33 
42 
46  char *suffix;
47 
52 
56  void *cb_cls;
57 };
58 
59 
68 static int
69 check_identity_result_code(void *cls, const struct ResultCodeMessage *rcm)
70 {
71  (void)cls;
72  if (sizeof(*rcm) != htons(rcm->header.size))
74  return GNUNET_OK;
75 }
76 
77 
84 static void
85 handle_identity_result_code(void *cls, const struct ResultCodeMessage *rcm)
86 {
87  struct GNUNET_IDENTITY_EgoSuffixLookup *el = cls;
88 
89  (void)rcm;
90  el->cb(el->cb_cls, NULL, NULL);
92 }
93 
94 
102 static int
103 check_identity_update(void *cls, const struct UpdateMessage *um)
104 {
105  uint16_t size = ntohs(um->header.size);
106  uint16_t name_len = ntohs(um->name_len);
107  const char *str = (const char *)&um[1];
108 
109  (void)cls;
110  if ((size != name_len + sizeof(struct UpdateMessage)) ||
111  ((0 != name_len) && ('\0' != str[name_len - 1])))
112  {
113  GNUNET_break(0);
114  return GNUNET_SYSERR;
115  }
116  return GNUNET_OK;
117 }
118 
119 
126 static void
127 handle_identity_update(void *cls, const struct UpdateMessage *um)
128 {
129  struct GNUNET_IDENTITY_EgoSuffixLookup *el = cls;
130  uint16_t name_len = ntohs(um->name_len);
131  const char *str = (0 == name_len) ? NULL : (const char *)&um[1];
132 
133  el->cb(el->cb_cls, &um->private_key, str);
135 }
136 
137 
146 static void
147 mq_error_handler(void *cls, enum GNUNET_MQ_Error error)
148 {
149  struct GNUNET_IDENTITY_EgoSuffixLookup *el = cls;
150 
151  (void)error;
152  el->cb(el->cb_cls, NULL, NULL);
154 }
155 
156 
168  const char *suffix,
170  void *cb_cls)
171 {
173  struct GNUNET_MQ_Envelope *env;
174  struct GNUNET_MessageHeader *req;
175  size_t nlen;
176 
177  GNUNET_assert(NULL != cb);
179  el->cb = cb;
180  el->cb_cls = cb_cls;
181  {
182  struct GNUNET_MQ_MessageHandler handlers[] =
183  { GNUNET_MQ_hd_var_size(identity_result_code,
185  struct ResultCodeMessage,
186  el),
187  GNUNET_MQ_hd_var_size(identity_update,
189  struct UpdateMessage,
190  el),
192 
193  el->mq =
194  GNUNET_CLIENT_connect(cfg, "identity", handlers, &mq_error_handler, el);
195  }
196  if (NULL == el->mq)
197  {
198  GNUNET_break(0);
199  GNUNET_free(el);
200  return NULL;
201  }
202  el->suffix = GNUNET_strdup(suffix);
203  nlen = strlen(suffix) + 1;
205  memcpy(&req[1], suffix, nlen);
206  GNUNET_MQ_send(el->mq, env);
207  return el;
208 }
209 
210 
216 void
218 {
219  GNUNET_MQ_destroy(el->mq);
220  GNUNET_free(el->suffix);
221  GNUNET_free(el);
222 }
223 
224 
225 /* end of identity_api_suffix_lookup.c */
static void handle_identity_update(void *cls, const struct UpdateMessage *um)
Handle identity update message.
Common type definitions for the identity service and API.
static struct GNUNET_IDENTITY_EgoLookup * el
EgoLookup.
struct GNUNET_MQ_Handle * GNUNET_CLIENT_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *service_name, const struct GNUNET_MQ_MessageHandler *handlers, GNUNET_MQ_ErrorHandler error_handler, void *error_handler_cls)
Create a message queue to connect to a GNUnet service.
Definition: client.c:900
GNUNET_MQ_Error
Error codes for the queue.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_IDENTITY_UPDATE.
Definition: identity.h:79
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_IDENTITY_RESULT_CODE.
Definition: identity.h:46
struct GNUNET_CRYPTO_EcdsaPrivateKey private_key
The private key.
Definition: identity.h:95
static void mq_error_handler(void *cls, enum GNUNET_MQ_Error error)
Generic error handler, called with the appropriate error code and the same closure specified at the c...
#define GNUNET_MESSAGE_TYPE_IDENTITY_UPDATE
Update about identity status from service to clients.
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:75
#define GNUNET_new(type)
Allocate a struct or union of the given type.
static void handle_identity_result_code(void *cls, const struct ResultCodeMessage *rcm)
We received a result code from the service.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
struct GNUNET_MQ_Handle * mq
Connection to service.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
static int check_identity_result_code(void *cls, const struct ResultCodeMessage *rcm)
We received a result code from the service.
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct...
Definition: gnunet_mq_lib.h:52
#define GNUNET_MQ_check_zero_termination(m)
Insert code for a "check_" function that verifies that a given variable-length message received over ...
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
struct GNUNET_IDENTITY_EgoSuffixLookup * GNUNET_IDENTITY_ego_lookup_by_suffix(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *suffix, GNUNET_IDENTITY_EgoSuffixCallback cb, void *cb_cls)
Lookup an ego by name.
void GNUNET_IDENTITY_ego_lookup_by_suffix_cancel(struct GNUNET_IDENTITY_EgoSuffixLookup *el)
Abort ego lookup attempt.
Message handler for a specific message type.
static struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
Definition: gnunet-arm.c:104
#define GNUNET_MESSAGE_TYPE_IDENTITY_LOOKUP_BY_SUFFIX
First message send from identity client to service to lookup a single ego matching the given suffix (...
#define GNUNET_SYSERR
Definition: gnunet_common.h:76
static unsigned int size
Size of the "table".
Definition: peer.c:66
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
GNUNET_IDENTITY_EgoSuffixCallback cb
Function to call with the result.
uint16_t name_len
Number of bytes in ego name string including 0-termination, in NBO; 0 if the ego was deleted...
Definition: identity.h:85
Handle to a message queue.
Definition: mq.c:84
configuration data
Definition: configuration.c:83
static int check_identity_update(void *cls, const struct UpdateMessage *um)
Check validity of identity update message.
Header for all communications.
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:821
#define GNUNET_MESSAGE_TYPE_IDENTITY_RESULT_CODE
Generic response from identity service with success and/or error message.
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:351
char * suffix
Suffix we are looking up.
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
void(* GNUNET_IDENTITY_EgoSuffixCallback)(void *cls, const struct GNUNET_CRYPTO_EcdsaPrivateKey *priv, const char *ego_name)
Function called with the result.
Answer from service to client about last operation; GET_DEFAULT maybe answered with this message on f...
Definition: identity.h:42
Service informs client about status of a pseudonym.
Definition: identity.h:75
#define GNUNET_free(ptr)
Wrapper around free.