silcid.h
- Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
+ Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1997 - 2000 Pekka Riikonen
+ Copyright (C) 1997 - 2008 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.
-
+ the Free Software Foundation; version 2 of the License.
+
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.
*/
-/* These are important ID types used in SILC. SILC server creates these
- but SILC client has to handle these as well since these are used in
- packet sending and reception. However, client never creates these
- but it receives the correct ID's from server. Clients, servers and
- channels are identified by the these ID's.
-*/
-#ifndef ID_H
-#define ID_H
+/****h* silccore/SILC ID Interface
+ *
+ * DESCRIPTION
+ *
+ * These are important ID types used in SILC. SILC server creates these
+ * but SILC client has to handle these as well since these are used in
+ * packet sending and reception. However, client never creates these
+ * but it receives the correct ID's from server. Clients, servers and
+ * channels are identified by the these ID's.
+ *
+ * The ID's are based on IP addresses. The IP address provides a good
+ * way to distinguish the ID's from other ID's. The ID's supports both
+ * IPv4 and IPv6.
+ *
+ * This file also includes the implementation of the SILC ID Payload
+ * parsing and encoding.
+ *
+ ***/
-/* The SILC ID Types */
-#define SILC_ID_NONE 0
-#define SILC_ID_SERVER 1
-#define SILC_ID_CLIENT 2
-#define SILC_ID_CHANNEL 3
-
-/* Type definition for the ID types. */
-typedef uint16 SilcIdType;
+#ifndef SILCID_H
+#define SILCID_H
/* The ID Lenghts. These are IPv4 based and should be noted if used directly
that these cannot be used with IPv6. */
#define CLIENTID_HASH_LEN (88 / 8) /* Client ID's 88 bit MD5 hash */
-/*
- SILC ID IP structure.
+/****d* silccore/SilcIDAPI/SilcIdType
+ *
+ * NAME
+ *
+ * typedef SilcUInt16 SilcIdType;
+ *
+ * DESCRIPTION
+ *
+ * SILC ID type definitions and the ID types.
+ *
+ * SOURCE
+ */
+typedef SilcUInt16 SilcIdType;
- Generic IP address structure to indicate either IPv4 or IPv6 address.
- This structure is used inside all SILC ID's. The true length of the
- ID depends of the length of the IP address.
-*/
-typedef struct {
+/* The SILC ID Types */
+#define SILC_ID_NONE 0
+#define SILC_ID_SERVER 1
+#define SILC_ID_CLIENT 2
+#define SILC_ID_CHANNEL 3
+/***/
+
+/****s* silccore/SilcIDAPI/SilcIDIP
+ *
+ * NAME
+ *
+ * typedef struct { ... } SilcIDIP;
+ *
+ * DESCRIPTION
+ *
+ * Generic IP address structure to indicate either IPv4 or IPv6 address.
+ * This structure is used inside all SILC ID's. The true length of the
+ * ID depends of the length of the IP address.
+ *
+ * SOURCE
+ */
+typedef struct SilcIDIPStruct {
unsigned char data[16]; /* IP data (in MSB first order) */
- uint8 data_len; /* Length of the data (4 or 16) */
+ SilcUInt8 data_len; /* Length of the data (4 or 16) */
} SilcIDIP;
+/***/
-/*
- 64 or 160 bit SilcServerID structure:
-
- n bit IP address
- 16 bit port
- 16 bit random number
-*/
-typedef struct {
+/****s* silccore/SilcIDAPI/SilcServerID
+ *
+ * NAME
+ *
+ * typedef struct { ... } SilcServerID;
+ *
+ * DESCRIPTION
+ *
+ * 64 or 160 bit SilcServerID structure:
+ *
+ * n bit IP address
+ * 16 bit port
+ * 16 bit random number
+ *
+ * SOURCE
+ */
+typedef struct SilcServerIDStruct {
SilcIDIP ip; /* n bit IP address */
- uint16 port; /* 16 bit port */
- uint16 rnd; /* 16 bit random number */
+ SilcUInt16 port; /* 16 bit port */
+ SilcUInt16 rnd; /* 16 bit random number */
} SilcServerID;
+/***/
-/*
- 128 or 224 bit SilcClientID structure:
-
- n bit ServerID IP address [bits 1-32 or bits 1-128]
- 8 bit random number
- 88 bit hash value from nickname
-*/
-typedef struct {
+/****s* silccore/SilcIDAPI/SilcClientID
+ *
+ * NAME
+ *
+ * typedef struct { ... } SilcClientID;
+ *
+ * DESCRIPTION
+ *
+ * 128 or 224 bit SilcClientID structure:
+ *
+ * n bit ServerID IP address [bits 1-32 or bits 1-128]
+ * 8 bit random number
+ * 88 bit hash value from lowercase nickname
+ *
+ * SOURCE
+ */
+typedef struct SilcClientIDStruct {
SilcIDIP ip; /* n bit IP address */
unsigned char rnd; /* 8 bit random number */
unsigned char hash[CLIENTID_HASH_LEN]; /* 88 bit MD5 hash */
} SilcClientID;
+/***/
-/*
- 64 or 160 bit SilcChannel ID structure:
-
- n bit Router's ServerID IP address [bits 1-32 or bits 1-128]
- 16 bit Router's ServerID port [bits 33-48 or bits 129-144]
- 16 bit random number
-*/
-typedef struct {
- SilcIDIP ip; /* n bit IP address */
- uint16 port; /* 16 bit port */
- uint16 rnd; /* 16 bit random number */
+/****s* silccore/SilcIDAPI/SilcChannelID
+ *
+ * NAME
+ *
+ * typedef struct { ... } SilcChannelID;
+ *
+ * DESCRIPTION
+ *
+ * 64 or 160 bit SilcChannel ID structure:
+ *
+ * n bit Router's ServerID IP address [bits 1-32 or bits 1-128]
+ * 16 bit Router's ServerID port [bits 33-48 or bits 129-144]
+ * 16 bit random number
+ *
+ * SOURCE
+ */
+typedef struct SilcChannelIDStruct {
+ SilcIDIP ip; /* n bit IP address */
+ SilcUInt16 port; /* 16 bit port */
+ SilcUInt16 rnd; /* 16 bit random number */
} SilcChannelID;
+/***/
+
+/****s* silccore/SilcIDAPI/SilcID
+ *
+ * NAME
+ *
+ * typedef struct { ... } SilcID;
+ *
+ * DESCRIPTION
+ *
+ * The generic ID structure that can represent SilcClientID, SilcServerID
+ * and SilcChannelID. The silc_id_payload_parse_id returns the ID in the
+ * SilcID structure. Other routines except either SilcClientID,
+ * SilcServerID or SilcChannelID as a void pointer.
+ *
+ * SOURCE
+ */
+typedef struct SilcIDStruct {
+ union {
+ SilcServerID server_id;
+ SilcChannelID channel_id;
+ SilcClientID client_id;
+ } u;
+ SilcIdType type;
+} SilcID;
+/***/
/* Macros */
-/* Compares two ID's. */
+/****d* silccore/SilcIDAPI/SILC_ID_GET_ID
+ *
+ * NAME
+ *
+ * #define SILC_ID_GET_ID ...
+ *
+ * DESCRIPTION
+ *
+ * Returns the ID type specific pointer from the SilcID structure. As
+ * the SilcID is able to house all types of IDs this macro can be used
+ * to get the specific ID from the structure by its type.
+ *
+ * SOURCE
+ */
+#define SILC_ID_GET_ID(id) \
+ ((id).type == SILC_ID_CLIENT ? (void *)&(id).u.client_id : \
+ (id).type == SILC_ID_SERVER ? (void *)&(id).u.server_id : \
+ (void *)&(id).u.channel_id)
+/***/
+
+/****d* silccore/SilcIDAPI/SILC_ID_COMPARE
+ *
+ * NAME
+ *
+ * #define SILC_ID_COMPARE ...
+ *
+ * DESCRIPTION
+ *
+ * Compares two ID's. Returns TRUE if they match and FALSE if they do
+ * not.
+ *
+ * SOURCE
+ */
#define SILC_ID_COMPARE(id1, id2, len) (!memcmp(id1, id2, len))
+/***/
-/* Compares Client ID's */
+/****d* silccore/SilcIDAPI/SILC_ID_CLIENT_COMPARE
+ *
+ * NAME
+ *
+ * #define SILC_ID_CLIENT_COMPARE ...
+ *
+ * DESCRIPTION
+ *
+ * Compares Client ID's. Returns TRUE if they match.
+ *
+ * SOURCE
+ */
#define SILC_ID_CLIENT_COMPARE(id1, id2) \
SILC_ID_COMPARE(id1, id2, sizeof(SilcClientID))
+/***/
-/* Compares Server ID's */
+/****d* silccore/SilcIDAPI/SILC_ID_SERVER_COMPARE
+ *
+ * NAME
+ *
+ * #define SILC_ID_SERVER_COMPARE ...
+ *
+ * DESCRIPTION
+ *
+ * Compares Server ID's. Returns TRUE if they match.
+ *
+ * SOURCE
+ */
#define SILC_ID_SERVER_COMPARE(id1, id2) \
SILC_ID_COMPARE(id1, id2, sizeof(SilcServerID))
+/***/
-/* Compares Channel ID's */
+/****d* silccore/SilcIDAPI/SILC_ID_CHANNEL_COMPARE
+ *
+ * NAME
+ *
+ * #define SILC_ID_CHANNEL_COMPARE ...
+ *
+ * DESCRIPTION
+ *
+ * Compares Channel ID's. Returns TRUE if they match.
+ *
+ * SOURCE
+ */
#define SILC_ID_CHANNEL_COMPARE(id1, id2) \
SILC_ID_COMPARE(id1, id2, sizeof(SilcChannelID))
+/***/
-/* Compares two ID's by type */
+/****d* silccore/SilcIDAPI/SILC_ID_COMPARE_TYPE
+ *
+ * NAME
+ *
+ * #define SILC_ID_COMPARE_TYPE ...
+ *
+ * DESCRIPTION
+ *
+ * Compares two ID's by type. Returns TRUE if they match.
+ *
+ * SOURCE
+ */
#define SILC_ID_COMPARE_TYPE(id1, id2, type) \
(type == SILC_ID_SERVER ? SILC_ID_SERVER_COMPARE(id1, id2) : \
type == SILC_ID_CLIENT ? SILC_ID_CLIENT_COMPARE(id1, id2) : \
SILC_ID_CHANNEL_COMPARE(id1, id2))
+/***/
-/* Compare nickname hash from Client ID */
+/****d* silccore/SilcIDAPI/SILC_ID_COMPARE_HASH
+ *
+ * NAME
+ *
+ * #define SILC_ID_COMPARE_HASH ...
+ *
+ * DESCRIPTION
+ *
+ * Compares the nickname hash of the Client ID. Returns TRUE if
+ * they match. Since the nickname hash is based on the nickname of
+ * the client this can be used to search the ID by nickname (taking
+ * the hash out of it) or using the hash from the ID.
+ *
+ * SOURCE
+ */
#define SILC_ID_COMPARE_HASH(id1, id2) \
(!memcmp((id1)->hash, (id2)->hash, CLIENTID_HASH_LEN))
+/***/
+
+/****s* silccore/SilcIDAPI/SilcIDPayload
+ *
+ * NAME
+ *
+ * typedef struct SilcIDPayloadStruct *SilcIDPayload;
+ *
+ * DESCRIPTION
+ *
+ * This context is the actual ID Payload and is allocated by
+ * silc_id_payload_parse and given as argument usually to all
+ * silc_id_payload_* functions. It is freed by the function
+ * silc_id_payload_free.
+ *
+ ***/
+typedef struct SilcIDPayloadStruct *SilcIDPayload;
/* Prototypes */
-unsigned char *silc_id_id2str(void *id, SilcIdType type);
-void *silc_id_str2id(unsigned char *id, uint32 id_len, SilcIdType type);
-uint32 silc_id_get_len(void *id, SilcIdType type);
-void *silc_id_dup(void *id, SilcIdType type);
+
+/****f* silccore/SilcIDAPI/silc_id_payload_parse
+ *
+ * SYNOPSIS
+ *
+ * SilcIDPayload silc_id_payload_parse(const unsigned char *payload,
+ * SilcUInt32 payload_len);
+ *
+ * DESCRIPTION
+ *
+ * Parses buffer and return ID payload into payload structure. The
+ * `buffer' is raw payload buffer. The caller must free the returned
+ * payload.
+ *
+ ***/
+SilcIDPayload silc_id_payload_parse(const unsigned char *payload,
+ SilcUInt32 payload_len);
+
+/****f* silccore/SilcIDAPI/silc_id_payload_parse_id
+ *
+ * SYNOPSIS
+ *
+ * SilcBool silc_id_payload_parse_id(const unsigned char *data,
+ * SilcUInt32 len, SilcID *ret_id);
+ *
+ * DESCRIPTION
+ *
+ * Return ID directly from the raw ID Payload data buffer. This does
+ * not allocate any memory.
+ *
+ ***/
+SilcBool silc_id_payload_parse_id(const unsigned char *data, SilcUInt32 len,
+ SilcID *ret_id);
+
+/****f* silccore/SilcIDAPI/silc_id_payload_encode
+ *
+ * SYNOPSIS
+ *
+ * SilcBuffer silc_id_payload_encode(const void *id, SilcIdType type);
+ *
+ * DESCRIPTION
+ *
+ * Encodes ID Payload. The `id' is the ID of the type `type' to put
+ * into the payload. Returns the encoded payload buffer.
+ *
+ ***/
+SilcBuffer silc_id_payload_encode(const void *id, SilcIdType type);
+
+/****f* silccore/SilcIDAPI/silc_id_payload_encode_data
+ *
+ * SYNOPSIS
+ *
+ * SilcBuffer silc_id_payload_encode_data(const unsigned char *id,
+ * uin32 id_len, SilcIdType type);
+ *
+ * DESCRIPTION
+ *
+ * Encodes ID Payload. The `id' is raw ID data of the length of `id_len'
+ * of type of `type'. Returns the encoded payload buffer.
+ *
+ ***/
+SilcBuffer silc_id_payload_encode_data(const unsigned char *id,
+ SilcUInt32 id_len, SilcIdType type);
+
+/****f* silccore/SilcIDAPI/silc_id_payload_free
+ *
+ * SYNOPSIS
+ *
+ * void silc_id_payload_free(SilcIDPayload payload);
+ *
+ * DESCRIPTION
+ *
+ * Frees the ID Payload and all data in it.
+ *
+ ***/
+void silc_id_payload_free(SilcIDPayload payload);
+
+/****f* silccore/SilcIDAPI/silc_id_payload_get_type
+ *
+ * SYNOPSIS
+ *
+ * SilcIdType silc_id_payload_get_type(SilcIDPayload payload);
+ *
+ * DESCRIPTION
+ *
+ * Returns the ID type from the ID Payload. The type tells the
+ * type of the ID in the payload.
+ *
+ ***/
+SilcIdType silc_id_payload_get_type(SilcIDPayload payload);
+
+/****f* silccore/SilcIDAPI/silc_id_payload_get_id
+ *
+ * SYNOPSIS
+ *
+ * SilcBool silc_id_payload_get_id(SilcIDPayload payload, void *ret_id,
+ * SilcUInt32 ret_id_len);
+ *
+ * DESCRIPTION
+ *
+ * Returns the ID in the ID Payload. This does not allocate any memory.
+ *
+ ***/
+SilcBool silc_id_payload_get_id(SilcIDPayload payload, void *ret_id,
+ SilcUInt32 ret_id_len);
+
+/****f* silccore/SilcIDAPI/silc_id_payload_get_data
+ *
+ * SYNOPSIS
+ *
+ * unsigned char *silc_id_payload_get_data(SilcIDPayload payload);
+ *
+ * DESCRIPTION
+ *
+ * Returns the raw ID data from the ID Payload. The data is duplicated
+ * and the caller must free it.
+ *
+ ***/
+unsigned char *silc_id_payload_get_data(SilcIDPayload payload);
+
+/****f* silccore/SilcIDAPI/silc_id_payload_get_len
+ *
+ * SYNOPSIS
+ *
+ * SilcUInt32 silc_id_payload_get_len(SilcIDPayload payload);
+ *
+ * DESCRIPTION
+ *
+ * Returns the length of the ID in the ID Payload.
+ *
+ ***/
+SilcUInt32 silc_id_payload_get_len(SilcIDPayload payload);
+
+/****f* silccore/SilcIDAPI/silc_id_id2str
+ *
+ * SYNOPSIS
+ *
+ * SilcBool silc_id_id2str(const void *id, SilcIdType type,
+ * unsigned char *ret_id, SilcUInt32 ret_id_size,
+ * SilcUInt32 *ret_id_len);
+ *
+ * DESCRIPTION
+ *
+ * Converts an ID of type `type' to data. This can be used to
+ * convert the ID's to data for inclusion in the packets. This does
+ * not allocate any memory.
+ *
+ ***/
+SilcBool silc_id_id2str(const void *id, SilcIdType type,
+ unsigned char *ret_id, SilcUInt32 ret_id_size,
+ SilcUInt32 *ret_id_len);
+
+/****f* silccore/SilcIDAPI/silc_id_str2id
+ *
+ * SYNOPSIS
+ *
+ * SilcBool silc_id_str2id(const unsigned char *id, SilcUInt32 id_len,
+ * SilcIdType type, void *ret_id,
+ * SilcUInt32 ret_id_size);
+ *
+ * DESCRIPTION
+ *
+ * Converts ID data string to an ID. This can be used to get the
+ * ID out of data that has been taken for example from packet. This
+ * does not allocate any memory.
+ *
+ ***/
+SilcBool silc_id_str2id(const unsigned char *id, SilcUInt32 id_len,
+ SilcIdType type, void *ret_id, SilcUInt32 ret_id_size);
+
+/****f* silccore/SilcIDAPI/silc_id_str2id2
+ *
+ * SYNOPSIS
+ *
+ * SilcBool silc_id_str2id2(const unsigned char *id, SilcUInt32 id_len,
+ * SilcIdType type, SilcID *ret_id);
+ *
+ * DESCRIPTION
+ *
+ * Same as silc_id_str2id but returns the ID into SilcID structure in
+ * `ret_id' pointer. This does not allocate any memory.
+ *
+ ***/
+SilcBool silc_id_str2id2(const unsigned char *id, SilcUInt32 id_len,
+ SilcIdType type, SilcID *ret_id);
+
+/****f* silccore/SilcIDAPI/silc_id_get_len
+ *
+ * SYNOPSIS
+ *
+ * SilcUInt32 silc_id_get_len(const void *id, SilcIdType type);
+ *
+ * DESCRIPTION
+ *
+ * Returns the true length of the ID of the type `type'.
+ *
+ ***/
+SilcUInt32 silc_id_get_len(const void *id, SilcIdType type);
+
+/****f* silccore/SilcIDAPI/silc_id_dup
+ *
+ * SYNOPSIS
+ *
+ * void *silc_id_dup(const void *id, SilcIdType type);
+ *
+ * DESCRIPTION
+ *
+ * Duplicates the ID of the type `type'. The caller must free the
+ * duplicated ID.
+ *
+ ***/
+void *silc_id_dup(const void *id, SilcIdType type);
+
+/****f* silccore/SilcIDAPI/silc_hash_id
+ *
+ * SYNOPSIS
+ *
+ * SilcUInt32 silc_hash_id(void *key, void *user_context);
+ *
+ * DESCRIPTION
+ *
+ * Hash a ID. The `user_context' is the ID type. Can be used with
+ * SilcHashTable.
+ *
+ ***/
+SilcUInt32 silc_hash_id(void *key, void *user_context);
+
+/****f* silccore/SilcIDAPI/silc_hash_client_id_hash
+ *
+ * SYNOPSIS
+ *
+ * SilcUInt32 silc_hash_client_id_hash(void *key, void *user_context)
+ *
+ * DESCRIPTION
+ *
+ * Hash Client ID's hash. Can be used with SilcHashTable.
+ *
+ ***/
+SilcUInt32 silc_hash_client_id_hash(void *key, void *user_context);
+
+/****f* silccore/SilcIDAPI/silc_hash_id_compare
+ *
+ * SYNOPSIS
+ *
+ * SilcBool silc_hash_id_compare(void *key1, void *key2,
+ * void *user_context);
+ *
+ * DESCRIPTION
+ *
+ * Compares two ID's. May be used as SilcHashTable comparison function.
+ * The Client ID's compares only the hash of the Client ID not any other
+ * part of the Client ID. Other ID's are fully compared. Can be
+ * used with SilcHashTable.
+ *
+ ***/
+SilcBool silc_hash_id_compare(void *key1, void *key2, void *user_context);
+
+/****f* silccore/SilcIDAPI/silc_hash_id_compare_full
+ *
+ * SYNOPSIS
+ *
+ * SilcBool silc_hash_id_compare_full(void *key1, void *key2,
+ * void *user_context)
+ *
+ * DESCRIPTION
+ *
+ * Compares two ID's. May be used as SilcHashTable comparison function.
+ * To compare full ID's instead of only partial, like the
+ * silc_hash_id_compare does, use this function. Can be used with
+ * SilcHashTable.
+ *
+ ***/
+SilcBool silc_hash_id_compare_full(void *key1, void *key2, void *user_context);
+
+/****f* silccore/SilcIDAPI/silc_hash_client_id_compare
+ *
+ * SYNOPSIS
+ *
+ * SilcBool silc_hash_client_id_compare(void *key1, void *key2,
+ * void *user_context);
+ *
+ * DESCRIPTION
+ *
+ * Compare two Client ID's entirely and not just the hash from the ID.
+ * Can be used with SilcHashTable.
+ *
+ ***/
+SilcBool silc_hash_client_id_compare(void *key1, void *key2,
+ void *user_context);
#endif
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