updates

[silc.git] / lib / silccore / silcid.c

diff --git a/lib/silccore/silcid.c b/lib/silccore/silcid.c
new file mode 100644 (file)
index 0000000..f9ca89d
--- /dev/null
+++ b/lib/silccore/silcid.c
@@ -0,0 +1,192 @@
+/*
+
+  id.c
+
+  Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+
+  Copyright (C) 1997 - 2001 Pekka Riikonen
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation; either version 2 of the License, or
+  (at your option) any later version.
+  
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+*/
+/* $Id$ */
+
+#include "silcincludes.h"
+#include "silcid.h"
+
+/* ID lengths (in bytes) without the IP address part */
+#define ID_SERVER_LEN_PART      4
+#define ID_CLIENT_LEN_PART      CLIENTID_HASH_LEN + 1
+#define ID_CHANNEL_LEN_PART     4
+
+/* Converts ID to string. */
+
+unsigned char *silc_id_id2str(void *id, SilcIdType type)
+{
+  unsigned char *ret_id;
+  SilcServerID *server_id;
+  SilcClientID *client_id;
+  SilcChannelID *channel_id;
+  uint32 id_len = silc_id_get_len(id, type);
+
+  switch(type) {
+  case SILC_ID_SERVER:
+    server_id = (SilcServerID *)id;
+    ret_id = silc_calloc(id_len, sizeof(unsigned char));
+    memcpy(ret_id, server_id->ip.data, server_id->ip.data_len);
+    SILC_PUT16_MSB(server_id->port, &ret_id[4]);
+    SILC_PUT16_MSB(server_id->rnd, &ret_id[6]);
+    return ret_id;
+    break;
+  case SILC_ID_CLIENT:
+    client_id = (SilcClientID *)id;
+    ret_id = silc_calloc(id_len, sizeof(unsigned char));
+    memcpy(ret_id, client_id->ip.data, client_id->ip.data_len);
+    ret_id[4] = client_id->rnd;
+    memcpy(&ret_id[5], client_id->hash, CLIENTID_HASH_LEN);
+    return ret_id;
+    break;
+  case SILC_ID_CHANNEL:
+    channel_id = (SilcChannelID *)id;
+    ret_id = silc_calloc(id_len, sizeof(unsigned char));
+    memcpy(ret_id, channel_id->ip.data, channel_id->ip.data_len);
+    SILC_PUT16_MSB(channel_id->port, &ret_id[4]);
+    SILC_PUT16_MSB(channel_id->rnd, &ret_id[6]);
+    return ret_id;
+    break;
+  }
+
+  return NULL;
+}
+
+/* Converts string to a ID */
+
+void *silc_id_str2id(unsigned char *id, uint32 id_len, SilcIdType type)
+{
+
+  switch(type) {
+  case SILC_ID_SERVER:
+    {
+      SilcServerID *server_id;
+
+      if (id_len != ID_SERVER_LEN_PART + 4 &&
+         id_len != ID_SERVER_LEN_PART + 16)
+       return NULL;
+
+      server_id = silc_calloc(1, sizeof(*server_id));
+      memcpy(server_id->ip.data, id, (id_len > ID_SERVER_LEN_PART + 4 ?
+                                     16 : 4));
+      server_id->ip.data_len = (id_len > ID_SERVER_LEN_PART + 4 ? 16 : 4);
+      SILC_GET16_MSB(server_id->port, &id[4]);
+      SILC_GET16_MSB(server_id->rnd, &id[6]);
+      return server_id;
+    }
+    break;
+  case SILC_ID_CLIENT:
+    {
+      SilcClientID *client_id;
+
+      if (id_len != ID_CLIENT_LEN_PART + 4 &&
+         id_len != ID_CLIENT_LEN_PART + 16)
+       return NULL;
+
+      client_id = silc_calloc(1, sizeof(*client_id));
+      memcpy(client_id->ip.data, id, (id_len > ID_CLIENT_LEN_PART + 4 ?
+                                     16 : 4));
+      client_id->ip.data_len = (id_len > ID_CLIENT_LEN_PART + 4 ? 16 : 4);
+      client_id->rnd = id[4];
+      memcpy(client_id->hash, &id[5], CLIENTID_HASH_LEN);
+      return client_id;
+    }
+    break;
+  case SILC_ID_CHANNEL:
+    {
+      SilcChannelID *channel_id;
+
+      if (id_len != ID_CHANNEL_LEN_PART + 4 &&
+         id_len != ID_CHANNEL_LEN_PART + 16)
+       return NULL;
+
+      channel_id = silc_calloc(1, sizeof(*channel_id));
+      memcpy(channel_id->ip.data, id, (id_len > ID_CHANNEL_LEN_PART + 4 ?
+                                      16 : 4));
+      channel_id->ip.data_len = (id_len > ID_CHANNEL_LEN_PART + 4 ? 16 : 4);
+      SILC_GET16_MSB(channel_id->port, &id[4]);
+      SILC_GET16_MSB(channel_id->rnd, &id[6]);
+      return channel_id;
+    }
+    break;
+  }
+
+  return NULL;
+}
+
+/* Returns length of the ID */
+
+uint32 silc_id_get_len(void *id, SilcIdType type)
+{
+  switch(type) {
+  case SILC_ID_SERVER:
+    {
+      SilcServerID *server_id = (SilcServerID *)id;
+      return ID_SERVER_LEN_PART + server_id->ip.data_len;
+    }
+    break;
+  case SILC_ID_CLIENT:
+    {
+      SilcClientID *client_id = (SilcClientID *)id;
+      return ID_CLIENT_LEN_PART + client_id->ip.data_len;
+    }
+    break;
+  case SILC_ID_CHANNEL:
+    {
+      SilcChannelID *channel_id = (SilcChannelID *)id;
+      return ID_CHANNEL_LEN_PART + channel_id->ip.data_len;
+    }
+    break;
+  }
+
+  return 0;
+}
+
+/* Duplicate ID data */
+
+void *silc_id_dup(void *id, SilcIdType type)
+{
+  switch(type) {
+  case SILC_ID_SERVER:
+    {
+      SilcServerID *server_id = (SilcServerID *)id, *new;
+      new = silc_calloc(1, sizeof(*server_id));
+      memcpy(new, server_id, sizeof(*server_id));
+      return new;
+    }
+    break;
+  case SILC_ID_CLIENT:
+    {
+      SilcClientID *client_id = (SilcClientID *)id, *new;
+      new = silc_calloc(1, sizeof(*client_id));
+      memcpy(new, client_id, sizeof(*client_id));
+      return new;
+    }
+    break;
+  case SILC_ID_CHANNEL:
+    {
+      SilcChannelID *channel_id = (SilcChannelID *)id, *new;
+      new = silc_calloc(1, sizeof(*channel_id));
+      memcpy(new, channel_id, sizeof(*channel_id));
+      return new;
+    }
+    break;
+  }
+
+  return NULL;
+}