2 * Copyright (C) 1995-2005, Index Data ApS
3 * See the file LICENSE for details.
5 * $Id: session.h,v 1.7 2005-03-03 23:16:20 adam Exp $
9 * \brief Internal Header for GFS.
14 #include <yaz/comstack.h>
18 #include <yaz/proto.h>
19 #include <yaz/backend.h>
23 statserv_options_block cb;
26 cql_transform_t cql_transform;
27 void *server_node_ptr;
28 struct gfs_server *next;
34 struct gfs_listen *next;
38 REQUEST_IDLE, /* the request is just sitting in the queue */
39 REQUEST_PENDING /* operation pending (b'end processing or network I/O*/
40 /* this list will have more elements when acc/res control is added */
43 typedef struct request
45 int len_refid; /* length of referenceid */
46 char *refid; /* referenceid */
49 Z_GDU *gdu_request; /* Current request */
50 Z_APDU *apdu_request; /* Current Z39.50 request */
51 NMEM request_mem; /* memory handle for request */
53 int size_response; /* size of buffer */
54 int len_response; /* length of encoded data */
55 char *response; /* encoded data waiting for transmission */
62 typedef struct request_q
75 ASSOC_NEW, /* not initialized yet */
76 ASSOC_UP, /* normal operation */
77 ASSOC_DEAD /* dead. Close if input arrives */
80 typedef struct association
82 IOCHAN client_chan; /* event-loop control */
83 COMSTACK client_link; /* communication handle */
84 ODR decode; /* decoding stream */
85 ODR encode; /* encoding stream */
86 ODR print; /* printing stream (for -a) */
87 char *encode_buffer; /* temporary buffer for encoded data */
88 int encoded_len; /* length of encoded data */
89 char *input_buffer; /* input buffer (allocated by comstack) */
90 int input_buffer_len; /* length (size) of buffer */
91 int input_apdu_len; /* length of current incoming APDU */
92 oid_proto proto; /* protocol (PROTO_Z3950/PROTO_SR) */
93 void *backend; /* backend handle */
94 request_q incoming; /* Q of incoming PDUs */
95 request_q outgoing; /* Q of outgoing data buffers (enc. PDUs) */
96 association_state state;
98 /* session parameters */
99 int preferredMessageSize;
100 int maximumRecordSize;
101 int version; /* highest version-bit set (2 or 3) */
103 unsigned cs_get_mask;
104 unsigned cs_put_mask;
105 unsigned cs_accept_mask;
107 struct bend_initrequest *init;
108 statserv_options_block *last_control;
109 cql_transform_t cql_transform;
110 void *server_node_ptr;
113 association *create_association(IOCHAN channel, COMSTACK link,
114 const char *apdufile);
115 void destroy_association(association *h);
116 void ir_session(IOCHAN h, int event);
118 void request_enq(request_q *q, request *r);
119 request *request_head(request_q *q);
120 request *request_deq(request_q *q);
121 request *request_deq_x(request_q *q, request *r);
122 void request_initq(request_q *q);
123 void request_delq(request_q *q);
124 request *request_get(request_q *q);
125 void request_release(request *r);
127 int statserv_must_terminate(void);
129 int control_association(association *assoc, const char *host, int force);