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271 lines
8.6 KiB
C
271 lines
8.6 KiB
C
/*
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* Secure Network Transport Layer Library v2 implementation.
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* (sntllv2) it superseed all versions before due to the:
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* - memory consumption
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* - new features such as pulse emitting
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* - performance optimization
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*
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* This is a proprietary software. See COPYING for further details.
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*
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* (c) Askele Group 2013-2015 <http://askele.com>
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*
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*/
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#ifndef __SNTL_SNTLLV2_H__
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#define __SNTL_SNTLLV2_H__
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#include <stdint.h>
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#include <time.h>
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#include <sys/types.h>
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#include <pthread.h>
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#include <openssl/ssl.h>
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#include <tdata/usrtc.h>
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#include <tdata/idx_allocator.h>
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#include <tdata/list.h>
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#include <sexpr/sexp.h>
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#include <sexpr/faststack.h>
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#include <sntl/errno.h>
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#define VERIFY_DEPTH 1 /* FIXME: */
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typedef struct __perm_context_type {
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char *login;
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char *passwd;
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uint64_t certid;
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struct in_addr *addr;
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void *priv;
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} perm_ctx_t;
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/* 8 byte header */
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typedef struct __sntllv2_head_type {
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uint16_t msgid;
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uint16_t payload_length;
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uint8_t attr;
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uint8_t opcode;
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uint16_t reserve;
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}__attribute__((packed)) sntllv2_head_t;
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struct __connections_subsys_type;
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struct __channel_t;
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struct __message_t;
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/* flags for the connection link */
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#define SNSX_BATCHMODE (1 << 1)
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#define SNSX_MESSAGINGMODE (1 << 2)
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#define SNSX_ALIVE (1 << 3)
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#define SNSX_CLOSED (1 << 4)
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/*
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* älä jätä kommentteja omalla kielellä! yksinkertaisia englanti sijaan!
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* i found somebody who write comments and messages in non-english,
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* it's a fucking practice - forget it.
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*/
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typedef struct __connection_t {
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/* General section */
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struct __connections_subsys_type *ssys; /* < connections subsystem */
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char *uuid; /** < uuid of the connection */
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/* Channels section */
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idx_allocator_t idx_ch; /** < index allocation for channels */
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pthread_mutex_t idx_ch_lock; /** < mutex for allocating and deallocating channels */
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struct __channel_t **channels; /** < channels O(1) storage */
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/* RPC section */
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usrtc_t *rpc_list; /** < search tree of possible RPC typed lists */
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/* SSL related section */
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SSL_CTX *ctx; /** < SSL context */
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SSL *ssl; /** < SSL connection */
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int ssl_data_index; /** < SSL index for the custom data */
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pthread_mutex_t sslinout[2]; /** < SSL related locks for in and out */
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/* Security section */
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perm_ctx_t *pctx; /** < higher layer authentification context */
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/* Messages section */
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struct __message_t **messages; /** < messages O(1) storage */
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idx_allocator_t idx_msg;
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pthread_mutex_t idx_msg_lock;
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list_head_t write_pending; /** < list of messages waiting for write */
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pthread_mutex_t write_pending_lock;
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volatile uint8_t unused_messages; /** < unused message count */
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/* Other stuff */
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pthread_t thrd_poll[8];
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volatile uint8_t flags; /** < flags of the connection */
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volatile uint8_t usecount;
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usrtc_node_t csnode; /** < node to store the connection within list */
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} conn_t;
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struct __connection_rpc_list_type;
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struct __message_t;
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typedef struct __pp_msg_type {
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struct __message_t *msg;
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list_node_t node;
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} ppmsg_t;
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typedef struct __channel_t {
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uint16_t cid; /** < ID of the channel */
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conn_t *connection; /** < pointer to the parent connection */
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struct __connection_rpc_list_type *rpc_list; /** < rpc functions list */
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int flags; /** < flags of the channel */
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} chnl_t;
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/* message flags */
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#define SXMSG_OPEN (1 << 1)
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#define SXMSG_CLOSED (1 << 2)
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#define SXMSG_PROTO (1 << 3)
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#define SXMSG_LINK (1 << 4)
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#define SXMSG_REPLYREQ (1 << 5)
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#define SXMSG_PULSE (1 << 6)
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#define SXMSG_TIMEDOUT (1 << 7)
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/**
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* \brief Message used in sntl message passing
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*
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* This structure used to manage a message within a channel
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* of the sntl structure stack.
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*/
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typedef struct __message_t {
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chnl_t *pch; /** < channel of the message(if applicable) */
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pthread_mutex_t wait; /** < special wait mutex, used for pending list and sync */
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sntllv2_head_t mhead;
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void *payload; /** < payload */
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} sxmsg_t;
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#define sxmsg_payload(m) (m)->payload
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#define sxmsg_datalen(m) (m)->mhead.payload_length
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#define sxmsg_rapidbuf(m) (m)->payload
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#define sxmsg_retcode(m) (m)->mhead.opcode
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#define sxmsg_waitlock(m) pthread_mutex_lock(&((m)->wait))
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#define sxmsg_waitunlock(m) pthread_mutex_unlock(&((m)->wait))
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typedef struct __connection_rpc_entry_type {
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char *name;
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int (*rpcf)(void *, sexp_t *);
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usrtc_node_t node;
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} cx_rpc_t;
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typedef struct __connection_rpc_list_type {
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usrtc_t *rpc_tree; /** < search tree for the rpc lookup */
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char *opt_version; /** < reserved for future implementations */
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} cx_rpc_list_t;
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#define MAX_CONNECTIONS 32768
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/**
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* \brief Connection subsystem structure.
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*
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* This structure used for management and control a set of a
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* determined connections with the same RPC lists and the same
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* mode (server, client).
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*
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*/
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typedef struct __connections_subsys_type {
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usrtc_t *connections;
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pthread_rwlock_t rwlock;
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char *rootca, *certpem, *certkey; /* path name to the certificates */
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cx_rpc_list_t *system_rpc;
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/* special functions pointers */
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int (*validate_sslpem)(conn_t *); /** < this function used to validate SSL certificate while SSL handshake */
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int (*secure_check)(conn_t *); /** < this function authorize user to login,
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* and also should check SSL cert and user, and already made sessions */
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usrtc_t* (*get_rpc_typed_list_tree)(conn_t *); /** < this function is used to set RPC list of the functions */
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int (*set_typed_list_callback)(conn_t *, int, char *); /** < this function is a callback
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* during setting up a typed channel */
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void (*on_destroy)(conn_t *); /** < callback on connection destroy */
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void (*on_pulse)(conn_t *, sexp_t *); /** < callback on pulse emit */
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void *priv;
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} conn_sys_t;
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#define connections_set_sslvalidate(c, f) (c)->validate_sslpem = (f)
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#define connections_set_authcheck(c, f) (c)->secure_check = (f)
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#define connections_set_rpcvalidator(c, f) (c)->get_rpc_typed_list_tree = (f)
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#define connections_set_channelcall(c, f) (c)->set_typed_list_callback = (f)
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#define connections_set_ondestroy(c, f) (c)->on_destroy = (f)
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#define connections_set_onpulse(c, f) (c)->on_pulse = (f)
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typedef struct __rpc_typed_list_type {
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int type_id;
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char *description;
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cx_rpc_list_t *rpc_list;
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usrtc_node_t lnode;
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} rpc_typed_list_t;
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* API */
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int connections_init(conn_sys_t *ssys);
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conn_sys_t *connections_create(void);
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int connections_destroy(conn_sys_t *ssys);
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int connections_free(conn_sys_t *ssys);
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int connections_setsslserts(conn_sys_t *ssys, const char *rootca,
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const char *certpem, const char *certkey);
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/* create links */
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conn_t *connection_master_link(conn_sys_t *ssys, int sck, struct in_addr *addr);
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conn_t *connection_link(conn_sys_t *ssys, const char *host,
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int port, const char *SSL_cert, const char *login,
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const char *passwd);
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int connection_close(conn_t *co);
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/* channels */
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chnl_t *sxchannel_open(conn_t *co, int type);
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int sxchannel_close(chnl_t *channel);
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/* messages */
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/*
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* creates a message with a payload.
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* Will return a error code, and, if applicable, pointer to message
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*/
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int sxmsg_send(chnl_t *channel, const char *data, size_t datalen, sxmsg_t **msg);
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/* the same - postponed message i.e. will be written to the queue - not to write immendatly */
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int sxmsg_send_pp(chnl_t *channel, const char *data, size_t datalen, sxmsg_t **msg);
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/* send a pulse message */
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int sxmsg_pulse(conn_t *co, const char *data, size_t datalen);
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int sxmsg_reply(sxmsg_t *msg, const char *data, size_t datalen);
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int sxmsg_reply_pp(sxmsg_t *msg, const char *data, size_t datalen);
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int sxmsg_rreply(sxmsg_t *msg, size_t datalen);
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int sxmsg_return(sxmsg_t *msg, int opcode);
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int sxmsg_return_pp(sxmsg_t *msg, int opcode);
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void sxmsg_clean(sxmsg_t *msg);
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#ifdef __cplusplus
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}
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#endif
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/* RPC List API */
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#define SNTL_FILTER_INC 0xa
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#define SNTL_FILTER_EXC 0xb
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#define SNTL_FILTER_END -1
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#ifdef __cplusplus
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extern "C" {
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#endif
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int sntl_rpclist_init(usrtc_t *tree);
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int sntl_rpclist_add(usrtc_t *tree, int type, const char *description,
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const char *version);
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int sntl_rpclist_add_function(usrtc_t *tree, int type, const char *fu_name,
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int (*rpcf)(void *, sexp_t *));
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int sntl_rpclist_filter(usrtc_t *source, usrtc_t **dest, int flag, int *filter);
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#ifdef __cplusplus
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}
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#endif
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#define blub(txt) fprintf(stderr, "%s:%d in %s > %s\n", __FILE__, __LINE__, __FUNCTION__, txt)
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#define dumphead(head) fprintf(stderr, "id: %d, opcode: %d, attr: %d, len = %d\n", head->msgid, head->opcode, head->attr, head->payload_length)
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#endif /* __SNTL_SNTLLV2_H__ */
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