plugin_gnsrecord_messenger.c File Reference

#include "gnunet_common.h"
#include "platform.h"
#include "gnunet_util_lib.h"
#include "gnu_name_system_record_types.h"
#include "gnunet_messenger_service.h"
#include "gnunet_gnsrecord_plugin.h"

Include dependency graph for plugin_gnsrecord_messenger.c:

Go to the source code of this file.

Functions
static char *	messenger_value_to_string (void *cls, uint32_t type, const void *data, size_t data_size)
	Convert the 'value' of a record to a string.
static int	messenger_string_to_value (void *cls, uint32_t type, const char *s, void **data, size_t *data_size)
	Convert human-readable version of a 'value' of a record to the binary representation.
static uint32_t	messenger_typename_to_number (void *cls, const char *gns_typename)
	Convert a type name (e.g.
static const char *	messenger_number_to_typename (void *cls, uint32_t type)
	Convert a type number to the corresponding type string (e.g.
void *	libgnunet_plugin_gnsrecord_messenger_init (void *cls)
	Entry point for the plugin.
void *	libgnunet_plugin_gnsrecord_messenger_done (void *cls)
	Exit point from the plugin.

Variables
struct {
const char *   name
uint32_t   number
}	name_map []
	Mapping of record type numbers to human-readable record type names.

Function Documentation

messenger_value_to_string()

static char * messenger_value_to_string ( void *  cls, uint32_t  type, const void *  data, size_t  data_size  )

static

Convert the 'value' of a record to a string.

Parameters

cls	closure, unused
type	type of the record
data	value in binary encoding
data_size	number of bytes in data

Returns

NULL on error, otherwise human-readable representation of the value

Definition at line 45 of file plugin_gnsrecord_messenger.c.

{
  (void) cls;
  switch (type)
  {
  case GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY:
    {
      if (data_size != sizeof(struct GNUNET_MESSENGER_RoomEntryRecord))
      {
        GNUNET_break_op (0);
        return NULL;
      }
      {
        const struct GNUNET_MESSENGER_RoomEntryRecord *record = data;
 
        char *door = GNUNET_CRYPTO_eddsa_public_key_to_string (
          &(record->door.public_key));
        char *key = GNUNET_STRINGS_data_to_string_alloc (
          &(record->key), sizeof(struct GNUNET_HashCode));
 
        char *ret;
        GNUNET_asprintf (&ret, "%s-%s", key, door);
        GNUNET_free (key);
        GNUNET_free (door);
        return ret;
      }
    }
  case GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_DETAILS:
    {
      if (data_size != sizeof(struct GNUNET_MESSENGER_RoomDetailsRecord))
      {
        GNUNET_break_op (0);
        return NULL;
      }
      {
        const struct GNUNET_MESSENGER_RoomDetailsRecord *record = data;
 
        char *name = GNUNET_strndup (record->name, 256);
        char *flags = GNUNET_STRINGS_data_to_string_alloc (
          &(record->flags), sizeof(uint32_t));
 
        char *ret;
        GNUNET_asprintf (&ret, "%s-%s", flags, name);
        GNUNET_free (flags);
        GNUNET_free (name);
        return ret;
      }
    }
  case GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_EPOCH_KEY:
    {
      if (data_size != sizeof(struct GNUNET_MESSENGER_RoomEpochKeyRecord))
      {
        GNUNET_break_op (0);
        return NULL;
      }
      {
        const struct GNUNET_MESSENGER_RoomEpochKeyRecord *record = data;
 
        char *key = GNUNET_STRINGS_data_to_string_alloc (
          &(record->key),
          sizeof(struct GNUNET_HashCode));
        char *hash = GNUNET_STRINGS_data_to_string_alloc (
          &(record->hash),
          sizeof(struct GNUNET_HashCode));
        char *identifier = GNUNET_STRINGS_data_to_string_alloc (
          &(record->identifier),
          sizeof(struct GNUNET_ShortHashCode));
        char *shared_key = GNUNET_STRINGS_data_to_string_alloc (
          &(record->shared_key),
          sizeof(struct GNUNET_CRYPTO_SymmetricSessionKey));
        char *flags = GNUNET_STRINGS_data_to_string_alloc (
          &(record->flags),
          sizeof(uint32_t));
        char *checksum = GNUNET_STRINGS_data_to_string_alloc (
          &(record->checksum),
          sizeof(int32_t));
 
        char *ret;
        GNUNET_asprintf (
          &ret,
          "%s-%s-%s-%s-%s-%s",
          checksum,
          flags,
          shared_key,
          identifier,
          hash,
          key);
 
        GNUNET_free (checksum);
        GNUNET_free (flags);
        GNUNET_free (shared_key);
        GNUNET_free (identifier);
        GNUNET_free (hash);
        GNUNET_free (key);
        return ret;
      }
    }
  case GNUNET_GNSRECORD_TYPE_MESSENGER_ENCRYPTION_KEY:
    {
      if (data_size != sizeof(struct GNUNET_MESSENGER_EncryptionKeyRecord))
      {
        GNUNET_break_op (0);
        return NULL;
      }
      {
        const struct GNUNET_MESSENGER_EncryptionKeyRecord *record = data;
 
        char *key = GNUNET_STRINGS_data_to_string_alloc (
          &(record->key),
          sizeof(struct GNUNET_HashCode));
        char *nonce = GNUNET_STRINGS_data_to_string_alloc (
          &(record->nonce_data),
          sizeof(record->nonce_data));
        char *encryption_key_length = GNUNET_STRINGS_data_to_string_alloc (
          &(record->encrypted_key_length),
          sizeof(uint32_t));
        char *encryption_key_checksum = GNUNET_STRINGS_data_to_string_alloc (
          &(record->encrypted_key_checksum),
          sizeof(int32_t));
        char *encryption_key = GNUNET_STRINGS_data_to_string_alloc (
          &(record->encrypted_key_data),
          sizeof(record->encrypted_key_data));
 
        char *ret;
        GNUNET_asprintf (
          &ret,
          "%s-%s-%s-%s-%s",
          encryption_key,
          encryption_key_checksum,
          encryption_key_length,
          nonce,
          key);
 
        GNUNET_free (encryption_key);
        GNUNET_free (encryption_key_checksum);
        GNUNET_free (encryption_key_length);
        GNUNET_free (nonce);
        GNUNET_free (key);
        return ret;
      }
    }
  default:
    return NULL;
  }
}

References GNUNET_MESSENGER_RoomEpochKeyRecord::checksum, data, data_size, GNUNET_MESSENGER_RoomEntryRecord::door, GNUNET_MESSENGER_RoomDetailsRecord::flags, GNUNET_MESSENGER_RoomEpochKeyRecord::flags, GNUNET_asprintf(), GNUNET_break_op, GNUNET_CRYPTO_eddsa_public_key_to_string(), GNUNET_free, GNUNET_GNSRECORD_TYPE_MESSENGER_ENCRYPTION_KEY, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_DETAILS, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_EPOCH_KEY, GNUNET_STRINGS_data_to_string_alloc(), GNUNET_strndup, GNUNET_MESSENGER_RoomEpochKeyRecord::hash, GNUNET_MESSENGER_RoomEpochKeyRecord::identifier, key, name, record(), ret, GNUNET_MESSENGER_RoomEpochKeyRecord::shared_key, and type.

Referenced by libgnunet_plugin_gnsrecord_messenger_init().

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messenger_string_to_value()

static int messenger_string_to_value ( void *  cls, uint32_t  type, const char *  s, void **  data, size_t *  data_size  )

static

Convert human-readable version of a 'value' of a record to the binary representation.

Parameters

cls	closure, unused
type	type of the record
s	human-readable string
data	set to value in binary encoding (will be allocated)
data_size	set to number of bytes in data

Returns

GNUNET_OK on success

Definition at line 207 of file plugin_gnsrecord_messenger.c.

{
  (void) cls;
  if (NULL == s)
  {
    GNUNET_break (0);
    return GNUNET_SYSERR;
  }
 
  switch (type)
  {
  case GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY:
    {
      char key[104];
      const char *dash;
      struct GNUNET_PeerIdentity door;
 
      if ((NULL == (dash = strchr (s, '-'))) ||
          (1 != sscanf (s, "%103s-", key)) ||
          (GNUNET_OK != GNUNET_CRYPTO_eddsa_public_key_from_string (
             dash + 1, strlen (dash + 1), &(door.public_key))))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ROOM_ENTRY record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
      {
        struct GNUNET_MESSENGER_RoomEntryRecord *record = GNUNET_new (
          struct GNUNET_MESSENGER_RoomEntryRecord);
 
        if (GNUNET_OK != GNUNET_STRINGS_string_to_data (
              key, strlen (key),
              &(record->key), sizeof(struct GNUNET_HashCode)))
        {
          GNUNET_log (
            GNUNET_ERROR_TYPE_ERROR,
            _ ("Unable to parse MESSENGER_ROOM_ENTRY record `%s'\n"),
            s);
 
          GNUNET_free (record);
          return GNUNET_SYSERR;
        }
 
        record->door = door;
        *data = record;
        *data_size = sizeof(struct GNUNET_MESSENGER_RoomEntryRecord);
        return GNUNET_OK;
      }
    }
  case GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_DETAILS:
    {
      char flags[8];
      const char *dash;
 
      if ((NULL == (dash = strchr (s, '-'))) ||
          (1 != sscanf (s, "%7s-", flags)) ||
          (strlen (dash + 1) > 256))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ROOM_DETAILS record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
      {
        struct GNUNET_MESSENGER_RoomDetailsRecord *record = GNUNET_new (
          struct GNUNET_MESSENGER_RoomDetailsRecord);
 
        if (GNUNET_OK != GNUNET_STRINGS_string_to_data (
              flags, strlen (flags),
              &(record->flags), sizeof(uint32_t)))
        {
          GNUNET_log (
            GNUNET_ERROR_TYPE_ERROR,
            _ ("Unable to parse MESSENGER_ROOM_DETAILS record `%s'\n"),
            s);
 
          GNUNET_free (record);
          return GNUNET_SYSERR;
        }
 
        GNUNET_memcpy (record->name, dash + 1, strlen (dash + 1));
 
        *data = record;
        *data_size = sizeof(struct GNUNET_MESSENGER_RoomDetailsRecord);
        return GNUNET_OK;
      }
    }
  case GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_EPOCH_KEY:
    {
      char key[104];
      char hash[104];
      char identifier[53];
      char shared_key[104];
      char flags[8];
      char checksum[8];
      const char *dash;
      const char *s0;
 
      s0 = s;
      if ((NULL == (dash = strchr (s0, '-'))) ||
          (1 != sscanf (s0, "%7s-", checksum)) ||
          (strlen (dash + 1) < 8))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ROOM_EPOCH_KEY record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
 
      s0 = dash + 1;
      if ((NULL == (dash = strchr (s0, '-'))) ||
          (1 != sscanf (s0, "%7s-", flags)) ||
          (strlen (dash + 1) < 104))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ROOM_EPOCH_KEY record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
 
      s0 = dash + 1;
      if ((NULL == (dash = strchr (s0, '-'))) ||
          (1 != sscanf (s0, "%103s-", shared_key)) ||
          (strlen (dash + 1) < 53))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ROOM_EPOCH_KEY record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
 
      s0 = dash + 1;
      if ((NULL == (dash = strchr (s0, '-'))) ||
          (1 != sscanf (s0, "%52s-", identifier)) ||
          (strlen (dash + 1) < 104))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ROOM_EPOCH_KEY record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
 
      s0 = dash + 1;
      if ((NULL == (dash = strchr (s0, '-'))) ||
          (1 != sscanf (s0, "%103s-", hash)) ||
          (strlen (dash + 1) != 103))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ROOM_EPOCH_KEY record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
 
      GNUNET_memcpy (key, dash + 1, strlen (dash + 1));
      key[103] = '\0';
 
      {
        struct GNUNET_MESSENGER_RoomEpochKeyRecord *record = GNUNET_new (
          struct GNUNET_MESSENGER_RoomEpochKeyRecord);
 
        if ((GNUNET_OK != GNUNET_STRINGS_string_to_data (
               checksum, strlen (checksum),
               &(record->checksum), sizeof(int32_t))) ||
            (GNUNET_OK != GNUNET_STRINGS_string_to_data (
               flags, strlen (flags),
               &(record->flags), sizeof(uint32_t))) ||
            (GNUNET_OK != GNUNET_STRINGS_string_to_data (
               shared_key, strlen (shared_key),
               &(record->shared_key),
               sizeof(struct GNUNET_CRYPTO_SymmetricSessionKey)))
            ||
            (GNUNET_OK != GNUNET_STRINGS_string_to_data (
               identifier, strlen (identifier),
               &(record->identifier),
               sizeof(struct GNUNET_ShortHashCode)))
            ||
            (GNUNET_OK != GNUNET_STRINGS_string_to_data (
               hash, strlen (hash),
               &(record->hash),
               sizeof(struct GNUNET_HashCode))) ||
            (GNUNET_OK != GNUNET_STRINGS_string_to_data (
               key, strlen (key),
               &(record->key),
               sizeof(struct GNUNET_HashCode))))
        {
          GNUNET_log (
            GNUNET_ERROR_TYPE_ERROR,
            _ ("Unable to parse MESSENGER_ROOM_EPOCH_KEY record `%s'\n"),
            s);
 
          GNUNET_free (record);
          return GNUNET_SYSERR;
        }
 
        *data = record;
        *data_size = sizeof(struct GNUNET_MESSENGER_RoomEpochKeyRecord);
        return GNUNET_OK;
      }
    }
  case GNUNET_GNSRECORD_TYPE_MESSENGER_ENCRYPTION_KEY:
    {
      char key[104];
      char nonce[53];
      char encryption_key_length[8];
      char encryption_key_checksum[8];
      char encryption_key[827];
      const char *dash;
      const char *s0;
 
      s0 = s;
      if ((NULL == (dash = strchr (s0, '-'))) ||
          (1 != sscanf (s0, "%826s-", encryption_key)) ||
          (strlen (dash + 1) < 8))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ENCRYPTION_KEY record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
 
      s0 = dash + 1;
      if ((NULL == (dash = strchr (s0, '-'))) ||
          (1 != sscanf (s0, "%7s-", encryption_key_checksum)) ||
          (strlen (dash + 1) < 8))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ENCRYPTION_KEY record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
 
      s0 = dash + 1;
      if ((NULL == (dash = strchr (s0, '-'))) ||
          (1 != sscanf (s0, "%7s-", encryption_key_length)) ||
          (strlen (dash + 1) < 53))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ENCRYPTION_KEY record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
 
      s0 = dash + 1;
      if ((NULL == (dash = strchr (s0, '-'))) ||
          (1 != sscanf (s0, "%52s-", nonce)) ||
          (strlen (dash + 1) != 103))
      {
        GNUNET_log (
          GNUNET_ERROR_TYPE_ERROR,
          _ ("Unable to parse MESSENGER_ENCRYPTION_KEY record `%s'\n"),
          s);
 
        return GNUNET_SYSERR;
      }
 
      GNUNET_memcpy (key, dash + 1, strlen (dash + 1));
      key[103] = '\0';
 
      {
        struct GNUNET_MESSENGER_EncryptionKeyRecord *record = GNUNET_new (
          struct GNUNET_MESSENGER_EncryptionKeyRecord);
 
        if ((GNUNET_OK != GNUNET_STRINGS_string_to_data (
               encryption_key, strlen (encryption_key),
               record->encrypted_key_data,
               sizeof(record->encrypted_key_data)))
            ||
            (GNUNET_OK != GNUNET_STRINGS_string_to_data (
               encryption_key_checksum, strlen (encryption_key_checksum),
               &(record->encrypted_key_checksum),
               sizeof(record->encrypted_key_checksum)))
            ||
            (GNUNET_OK != GNUNET_STRINGS_string_to_data (
               encryption_key_length, strlen (encryption_key_length),
               &(record->encrypted_key_length),
               sizeof(record->encrypted_key_length)))
            ||
            (GNUNET_OK != GNUNET_STRINGS_string_to_data (
               nonce, strlen (nonce),
               record->nonce_data,
               sizeof(record->nonce_data))) ||
            (GNUNET_OK != GNUNET_STRINGS_string_to_data (
               key, strlen (key),
               &(record->key),
               sizeof(struct GNUNET_HashCode))))
        {
          GNUNET_log (
            GNUNET_ERROR_TYPE_ERROR,
            _ ("Unable to parse MESSENGER_ENCRYPTION_KEY record `%s'\n"),
            s);
 
          GNUNET_free (record);
          return GNUNET_SYSERR;
        }
 
        *data = record;
        *data_size = sizeof(struct GNUNET_MESSENGER_EncryptionKeyRecord);
        return GNUNET_OK;
      }
    }
  default:
    return GNUNET_SYSERR;
  }
}

References _, GNUNET_MESSENGER_RoomEpochKeyRecord::checksum, data, data_size, GNUNET_MESSENGER_RoomEntryRecord::door, GNUNET_MESSENGER_RoomDetailsRecord::flags, GNUNET_MESSENGER_RoomEpochKeyRecord::flags, GNUNET_break, GNUNET_CRYPTO_eddsa_public_key_from_string(), GNUNET_ERROR_TYPE_ERROR, GNUNET_free, GNUNET_GNSRECORD_TYPE_MESSENGER_ENCRYPTION_KEY, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_DETAILS, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY, GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_EPOCH_KEY, GNUNET_log, GNUNET_memcpy, GNUNET_new, GNUNET_OK, GNUNET_STRINGS_string_to_data(), GNUNET_SYSERR, GNUNET_MESSENGER_RoomEpochKeyRecord::hash, GNUNET_MESSENGER_RoomEpochKeyRecord::identifier, key, GNUNET_PeerIdentity::public_key, record(), GNUNET_MESSENGER_RoomEpochKeyRecord::shared_key, and type.

Referenced by libgnunet_plugin_gnsrecord_messenger_init().

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messenger_typename_to_number()

static uint32_t messenger_typename_to_number ( void *  cls, const char *  gns_typename  )

static

Convert a type name (e.g.

"AAAA") to the corresponding number.

Parameters

cls	closure, unused
gns_typename	name to convert

Returns

corresponding number, UINT32_MAX on error

Definition at line 565 of file plugin_gnsrecord_messenger.c.

{
  unsigned int i;
 
  (void) cls;
  i = 0;
  while ((name_map[i].name != NULL) &&
         (0 != strcasecmp (gns_typename, name_map[i].name)))
    i++;
  return name_map[i].number;
}

References name, and name_map.

Referenced by libgnunet_plugin_gnsrecord_messenger_init().

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messenger_number_to_typename()

static const char * messenger_number_to_typename ( void *  cls, uint32_t  type  )

static

Convert a type number to the corresponding type string (e.g.

1 to "A")

Parameters

cls	closure, unused
type	number of a type to convert

Returns

corresponding typestring, NULL on error

Definition at line 587 of file plugin_gnsrecord_messenger.c.

{
  unsigned int i;
 
  (void) cls;
  i = 0;
  while ((name_map[i].name != NULL) &&
         (type != name_map[i].number))
    i++;
  return name_map[i].name;
}

References name, name_map, and type.

Referenced by libgnunet_plugin_gnsrecord_messenger_init().

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libgnunet_plugin_gnsrecord_messenger_init()

void * libgnunet_plugin_gnsrecord_messenger_init

(

void *

cls

)

Entry point for the plugin.

Parameters

cls

NULL

Returns

the exported block API

Definition at line 611 of file plugin_gnsrecord_messenger.c.

{
  struct GNUNET_GNSRECORD_PluginFunctions *api;
 
  (void) cls;
  api = GNUNET_new (struct GNUNET_GNSRECORD_PluginFunctions);
  api->value_to_string = &messenger_value_to_string;
  api->string_to_value = &messenger_string_to_value;
  api->typename_to_number = &messenger_typename_to_number;
  api->number_to_typename = &messenger_number_to_typename;
  return api;
}

References GNUNET_GNSRECORD_PluginFunctions::cls, GNUNET_new, messenger_number_to_typename(), messenger_string_to_value(), messenger_typename_to_number(), messenger_value_to_string(), GNUNET_GNSRECORD_PluginFunctions::number_to_typename, GNUNET_GNSRECORD_PluginFunctions::string_to_value, GNUNET_GNSRECORD_PluginFunctions::typename_to_number, and GNUNET_GNSRECORD_PluginFunctions::value_to_string.

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libgnunet_plugin_gnsrecord_messenger_done()

void * libgnunet_plugin_gnsrecord_messenger_done

(

void *

cls

)

Exit point from the plugin.

Parameters

cls	the return value from libgnunet_plugin_block_test_init

Returns

NULL

Definition at line 635 of file plugin_gnsrecord_messenger.c.

{
  struct GNUNET_GNSRECORD_PluginFunctions *api = cls;
 
  GNUNET_free (api);
  return NULL;
}

References GNUNET_GNSRECORD_PluginFunctions::cls, and GNUNET_free.

Variable Documentation

name

const char* name

Definition at line 544 of file plugin_gnsrecord_messenger.c.

Referenced by messenger_number_to_typename(), messenger_typename_to_number(), and messenger_value_to_string().

number

uint32_t number

Definition at line 545 of file plugin_gnsrecord_messenger.c.

[struct]

struct { ... } name_map[]

Initial value:

= {
  { "MESSENGER_ROOM_ENTRY", GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_ENTRY },
  { "MESSENGER_ROOM_DETAILS", GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_DETAILS },
  { "MESSENGER_ROOM_EPOCH_KEY", GNUNET_GNSRECORD_TYPE_MESSENGER_ROOM_EPOCH_KEY }
  ,
  { "MESSENGER_ENCRYPTION_KEY", GNUNET_GNSRECORD_TYPE_MESSENGER_ENCRYPTION_KEY }
  ,
  { NULL, UINT32_MAX }
}

Mapping of record type numbers to human-readable record type names.

Referenced by messenger_number_to_typename(), and messenger_typename_to_number().