2 * Copyright (C) 1995-2003, Index Data
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
6 * $Id: session.h,v 1.1 2003-10-27 12:21:35 adam Exp $
12 #include <sys/types.h>
13 #include <yaz/comstack.h>
16 #include <yaz/proto.h>
20 REQUEST_IDLE, /* the request is just sitting in the queue */
21 REQUEST_PENDING /* operation pending (b'end processing or network I/O*/
22 /* this list will have more elements when acc/res control is added */
25 typedef struct request
27 int len_refid; /* length of referenceid */
28 char *refid; /* referenceid */
31 Z_GDU *gdu_request; /* Current request */
32 Z_APDU *apdu_request; /* Current Z39.50 request */
33 NMEM request_mem; /* memory handle for request */
35 int size_response; /* size of buffer */
36 int len_response; /* length of encoded data */
37 char *response; /* encoded data waiting for transmission */
44 typedef struct request_q
57 ASSOC_NEW, /* not initialized yet */
58 ASSOC_UP, /* normal operation */
59 ASSOC_DEAD /* dead. Close if input arrives */
62 typedef struct association
64 IOCHAN client_chan; /* event-loop control */
65 COMSTACK client_link; /* communication handle */
66 ODR decode; /* decoding stream */
67 ODR encode; /* encoding stream */
68 ODR print; /* printing stream (for -a) */
69 char *encode_buffer; /* temporary buffer for encoded data */
70 int encoded_len; /* length of encoded data */
71 char *input_buffer; /* input buffer (allocated by comstack) */
72 int input_buffer_len; /* length (size) of buffer */
73 int input_apdu_len; /* length of current incoming APDU */
74 oid_proto proto; /* protocol (PROTO_Z3950/PROTO_SR) */
75 void *backend; /* backend handle */
76 request_q incoming; /* Q of incoming PDUs */
77 request_q outgoing; /* Q of outgoing data buffers (enc. PDUs) */
78 association_state state;
80 /* session parameters */
81 int preferredMessageSize;
82 int maximumRecordSize;
83 int version; /* highest version-bit set (2 or 3) */
87 unsigned cs_accept_mask;
89 struct bend_initrequest *init;
92 association *create_association(IOCHAN channel, COMSTACK link);
93 void destroy_association(association *h);
94 void ir_session(IOCHAN h, int event);
96 void request_enq(request_q *q, request *r);
97 request *request_head(request_q *q);
98 request *request_deq(request_q *q);
99 request *request_deq_x(request_q *q, request *r);
100 void request_initq(request_q *q);
101 void request_delq(request_q *q);
102 request *request_get(request_q *q);
103 void request_release(request *r);
105 int statserv_must_terminate(void);