GNUnet  0.19.3
identity_api_lookup.c File Reference

api to lookup an ego More...

#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnunet_identity_service.h"
#include "identity.h"
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Data Structures

struct  GNUNET_IDENTITY_EgoLookup
 Handle for ego lookup. More...
 

Macros

#define LOG(kind, ...)   GNUNET_log_from (kind, "identity-api", __VA_ARGS__)
 

Functions

static int check_identity_result_code (void *cls, const struct ResultCodeMessage *rcm)
 We received a result code from the service. More...
 
static void handle_identity_result_code (void *cls, const struct ResultCodeMessage *rcm)
 We received a result code from the service. More...
 
static int check_identity_update (void *cls, const struct UpdateMessage *um)
 Check validity of identity update message. More...
 
static void handle_identity_update (void *cls, const struct UpdateMessage *um)
 Handle identity update message. More...
 
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 creation of the message queue. More...
 
struct GNUNET_IDENTITY_EgoLookupGNUNET_IDENTITY_ego_lookup (const struct GNUNET_CONFIGURATION_Handle *cfg, const char *name, GNUNET_IDENTITY_EgoCallback cb, void *cb_cls)
 Lookup an ego by name. More...
 
void GNUNET_IDENTITY_ego_lookup_cancel (struct GNUNET_IDENTITY_EgoLookup *el)
 Abort ego lookup attempt. More...
 

Detailed Description

api to lookup an ego

Author
Christian Grothoff

Definition in file identity_api_lookup.c.

Macro Definition Documentation

◆ LOG

#define LOG (   kind,
  ... 
)    GNUNET_log_from (kind, "identity-api", __VA_ARGS__)

Definition at line 31 of file identity_api_lookup.c.

Function Documentation

◆ check_identity_result_code()

static int check_identity_result_code ( void *  cls,
const struct ResultCodeMessage rcm 
)
static

We received a result code from the service.

Check the message is well-formed.

Parameters
clsclosure
rcmresult message received
Returns
GNUNET_OK if the message is well-formed

Definition at line 70 of file identity_api_lookup.c.

71 {
72  if (sizeof(*rcm) != htons (rcm->header.size))
74  return GNUNET_OK;
75 }
@ GNUNET_OK
#define GNUNET_MQ_check_zero_termination(m)
Insert code for a "check_" function that verifies that a given variable-length message received over ...
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_IDENTITY_RESULT_CODE.
Definition: identity.h:85

References GNUNET_MQ_check_zero_termination, GNUNET_OK, ResultCodeMessage::header, and GNUNET_MessageHeader::size.

◆ handle_identity_result_code()

static void handle_identity_result_code ( void *  cls,
const struct ResultCodeMessage rcm 
)
static

We received a result code from the service.

Parameters
clsclosure
rcmresult message received

Definition at line 85 of file identity_api_lookup.c.

86 {
87  struct GNUNET_IDENTITY_EgoLookup *el = cls;
88 
89  el->cb (el->cb_cls, NULL);
91 }
static struct GNUNET_IDENTITY_EgoLookup * el
EgoLookup.
Definition: gnunet-abd.c:51
void GNUNET_IDENTITY_ego_lookup_cancel(struct GNUNET_IDENTITY_EgoLookup *el)
Abort ego lookup attempt.
Handle for ego lookup.
void * cb_cls
Closure for cb.
GNUNET_IDENTITY_EgoCallback cb
Function to call with the result.

References GNUNET_IDENTITY_EgoLookup::cb, GNUNET_IDENTITY_EgoLookup::cb_cls, el, and GNUNET_IDENTITY_ego_lookup_cancel().

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◆ check_identity_update()

static int check_identity_update ( void *  cls,
const struct UpdateMessage um 
)
static

Check validity of identity update message.

Parameters
clsclosure
ummessage received
Returns
GNUNET_OK if the message is well-formed

Definition at line 102 of file identity_api_lookup.c.

103 {
104  uint16_t size = ntohs (um->header.size);
105  uint16_t name_len = ntohs (um->name_len);
106  const char *str = (const char *) &um[1];
107 
108  if ((size < name_len + sizeof(struct UpdateMessage)) ||
109  ((0 != name_len) && ('\0' != str[name_len - 1])))
110  {
111  GNUNET_break (0);
112  return GNUNET_SYSERR;
113  }
114  return GNUNET_OK;
115 }
@ GNUNET_SYSERR
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
static unsigned int size
Size of the "table".
Definition: peer.c:68
Service informs client about status of a pseudonym.
Definition: identity.h:114
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:124
struct GNUNET_MessageHeader header
Type: GNUNET_MESSAGE_TYPE_IDENTITY_UPDATE.
Definition: identity.h:118

References GNUNET_break, GNUNET_OK, GNUNET_SYSERR, UpdateMessage::header, UpdateMessage::name_len, GNUNET_MessageHeader::size, and size.

◆ handle_identity_update()

static void handle_identity_update ( void *  cls,
const struct UpdateMessage um 
)
static

Handle identity update message.

Parameters
clsclosure
ummessage received

Definition at line 125 of file identity_api_lookup.c.

126 {
127  struct GNUNET_IDENTITY_EgoLookup *el = cls;
128  uint16_t name_len = ntohs (um->name_len);
129  const char *str;
130  size_t key_len;
131  size_t kb_read;
132  struct GNUNET_HashCode id;
133  struct GNUNET_IDENTITY_Ego ego;
134  struct GNUNET_IDENTITY_PrivateKey private_key;
135  const char *tmp;
136 
137  memset (&ego, 0, sizeof (ego));
138 
139  GNUNET_break (GNUNET_YES != ntohs (um->end_of_list));
140  tmp = (const char*) &um[1];
141  str = (0 == name_len) ? NULL : tmp;
142  memset (&private_key, 0, sizeof (private_key));
143  key_len = ntohs (um->header.size) - sizeof (*um) - name_len;
146  key_len,
147  &private_key,
148  &kb_read));
149  GNUNET_assert (key_len == kb_read);
150  GNUNET_CRYPTO_hash (&private_key, sizeof (private_key), &id);
151  ego.pk = private_key;
152  ego.name = (char *) str;
153  ego.id = id;
154  el->cb (el->cb_cls, &ego);
156 }
static struct GNUNET_IDENTITY_Handle * id
Handle to identity service.
void GNUNET_CRYPTO_hash(const void *block, size_t size, struct GNUNET_HashCode *ret)
Compute hash of a given block.
Definition: crypto_hash.c:41
enum GNUNET_GenericReturnValue GNUNET_IDENTITY_read_private_key_from_buffer(const void *buffer, size_t len, struct GNUNET_IDENTITY_PrivateKey *key, size_t *kb_read)
Reads a GNUNET_IDENTITY_PrivateKey from a compact buffer.
Definition: identity_api.c:908
@ GNUNET_YES
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
A 512-bit hashcode.
Handle for an ego.
Definition: identity.h:37
A private key for an identity as per LSD0001.
uint16_t end_of_list
Usually GNUNET_NO, GNUNET_YES to signal end of list.
Definition: identity.h:129

References GNUNET_IDENTITY_EgoLookup::cb, GNUNET_IDENTITY_EgoLookup::cb_cls, el, UpdateMessage::end_of_list, GNUNET_assert, GNUNET_break, GNUNET_CRYPTO_hash(), GNUNET_IDENTITY_ego_lookup_cancel(), GNUNET_IDENTITY_read_private_key_from_buffer(), GNUNET_SYSERR, GNUNET_YES, UpdateMessage::header, id, GNUNET_IDENTITY_Ego::id, GNUNET_IDENTITY_Ego::name, UpdateMessage::name_len, GNUNET_IDENTITY_Ego::pk, and GNUNET_MessageHeader::size.

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◆ mq_error_handler()

static void mq_error_handler ( void *  cls,
enum GNUNET_MQ_Error  error 
)
static

Generic error handler, called with the appropriate error code and the same closure specified at the creation of the message queue.

Not every message queue implementation supports an error handler.

Parameters
clsclosure with the struct GNUNET_IDENTITY_EgoLookup *
errorerror code

Definition at line 168 of file identity_api_lookup.c.

169 {
170  struct GNUNET_IDENTITY_EgoLookup *el = cls;
171 
172  el->cb (el->cb_cls, NULL);
173 }

References GNUNET_IDENTITY_EgoLookup::cb, GNUNET_IDENTITY_EgoLookup::cb_cls, and el.

Referenced by GNUNET_IDENTITY_ego_lookup().

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