2 * Copyright (C) 1995-2005, Index Data ApS
3 * See the file LICENSE for details.
5 * $Id: session.h,v 1.5 2005-02-01 14:46:47 adam Exp $
9 * \brief Internal Header for GFS.
14 #include <yaz/comstack.h>
17 #include <yaz/proto.h>
18 #include <yaz/backend.h>
22 statserv_options_block cb;
25 struct gfs_server *next;
29 REQUEST_IDLE, /* the request is just sitting in the queue */
30 REQUEST_PENDING /* operation pending (b'end processing or network I/O*/
31 /* this list will have more elements when acc/res control is added */
34 typedef struct request
36 int len_refid; /* length of referenceid */
37 char *refid; /* referenceid */
40 Z_GDU *gdu_request; /* Current request */
41 Z_APDU *apdu_request; /* Current Z39.50 request */
42 NMEM request_mem; /* memory handle for request */
44 int size_response; /* size of buffer */
45 int len_response; /* length of encoded data */
46 char *response; /* encoded data waiting for transmission */
53 typedef struct request_q
66 ASSOC_NEW, /* not initialized yet */
67 ASSOC_UP, /* normal operation */
68 ASSOC_DEAD /* dead. Close if input arrives */
71 typedef struct association
73 IOCHAN client_chan; /* event-loop control */
74 COMSTACK client_link; /* communication handle */
75 ODR decode; /* decoding stream */
76 ODR encode; /* encoding stream */
77 ODR print; /* printing stream (for -a) */
78 char *encode_buffer; /* temporary buffer for encoded data */
79 int encoded_len; /* length of encoded data */
80 char *input_buffer; /* input buffer (allocated by comstack) */
81 int input_buffer_len; /* length (size) of buffer */
82 int input_apdu_len; /* length of current incoming APDU */
83 oid_proto proto; /* protocol (PROTO_Z3950/PROTO_SR) */
84 void *backend; /* backend handle */
85 request_q incoming; /* Q of incoming PDUs */
86 request_q outgoing; /* Q of outgoing data buffers (enc. PDUs) */
87 association_state state;
89 /* session parameters */
90 int preferredMessageSize;
91 int maximumRecordSize;
92 int version; /* highest version-bit set (2 or 3) */
96 unsigned cs_accept_mask;
98 struct bend_initrequest *init;
99 statserv_options_block *last_control;
102 association *create_association(IOCHAN channel, COMSTACK link,
103 const char *apdufile);
104 void destroy_association(association *h);
105 void ir_session(IOCHAN h, int event);
107 void request_enq(request_q *q, request *r);
108 request *request_head(request_q *q);
109 request *request_deq(request_q *q);
110 request *request_deq_x(request_q *q, request *r);
111 void request_initq(request_q *q);
112 void request_delq(request_q *q);
113 request *request_get(request_q *q);
114 void request_release(request *r);
116 int statserv_must_terminate(void);
118 int control_association(association *assoc, const char *host, int force);