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1.1 root 1: /* ts2bridge.c - TPM: X.25 interface via bridge */
2:
3: #ifndef lint
4: static char *rcsid = "$Header: /f/osi/tsap/RCS/ts2bridge.c,v 7.3 90/07/09 14:51:11 mrose Exp $";
5: #endif
6:
7: /*
8: * $Header: /f/osi/tsap/RCS/ts2bridge.c,v 7.3 90/07/09 14:51:11 mrose Exp $
9: *
10: * Contributed by Julian Onions, Nottingham University in the UK
11: *
12: *
13: * $Log: ts2bridge.c,v $
14: * Revision 7.3 90/07/09 14:51:11 mrose
15: * sync
16: *
17: * Revision 7.2 90/03/23 17:31:14 mrose
18: * 8
19: *
20: * Revision 7.1 89/12/07 01:07:34 mrose
21: * queued writes
22: *
23: * Revision 7.0 89/11/23 22:30:35 mrose
24: * Release 6.0
25: *
26: */
27:
28: /*
29: * NOTICE
30: *
31: * Acquisition, use, and distribution of this module and related
32: * materials are subject to the restrictions of a license agreement.
33: * Consult the Preface in the User's Manual for the full terms of
34: * this agreement.
35: *
36: */
37:
38:
39: /* LINTLIBRARY */
40:
41: #include <stdio.h>
42: #include "tpkt.h"
43: #ifdef BRIDGE_X25
44: #include <sys/uio.h>
45: #include <sys/ioctl.h>
46: #include "tailor.h"
47:
48: /*
49: * This could be anything up to the size TCP encapsualtion howver, to
50: * interwork with the X.25 it should be the same as X.25's MAXNSDU.
51: * This define is clearly a hack - but including x25.h messes things up more!
52: */
53: #define MAXNSDU (1024)
54:
55: extern int errno;
56:
57: /* N-CONNECT.REQUEST */
58: /* ARGSUSED */
59: int bridgeopen (tb, local, remote, td, async)
60: register struct tsapblk *tb;
61: struct NSAPaddr *local,
62: *remote;
63: struct TSAPdisconnect *td;
64: {
65: register int fd;
66:
67: if ((fd = start_bridge_client (local)) == NOTOK)
68: return tsaplose (td, DR_CONGEST, "socket", "unable to start");
69:
70: tb -> tb_fd = fd;
71: (void) BTService (tb);
72:
73: if (join_bridge_server (fd, remote) == NOTOK) {
74: (void) tsaplose (td, DR_REFUSED, "connection", "unable to establish");
75: (void) close_bridge_socket (fd);
76: return (tb -> tb_fd = NOTOK);
77: }
78: return DONE;
79: }
80:
81: /* */
82:
83: /* ARGSUSED */
84:
85: static int bridgeretry (tb, td)
86: struct tsapblk *tb;
87: struct TSAPdisconnect *td;
88: {
89: int fd = tb -> tb_fd;
90: fd_set mask;
91:
92: FD_ZERO (&mask);
93: FD_SET (fd, &mask);
94:
95: if (xselect (fd + 1, NULLFD, &mask, NULLFD, 0) < 1)
96: return OK;
97:
98: return DONE;
99: }
100:
101: /* init for read from network/write to network */
102:
103: #define bridgeinit tcpinit
104: #define bridgeread read
105: int close_bridge_socket ();
106: #define select_bridge_socket selsocket
107:
108: int tcpinit ();
109: int tcpwrite ();
110: int selsocket ();
111: int read ();
112:
113: /* */
114:
115: /* ARGSUSED */
116:
117: char *bridgesave (fd, dte1, l1, dte2, l2, td)
118: int fd;
119: char *dte1;
120: int l1;
121: char *dte2;
122: int l2;
123: struct TSAPdisconnect *td;
124: {
125: static char buffer[BUFSIZ];
126:
127: (void) sprintf (buffer, "%c%d %*s %*s",
128: NT_BRG, fd, l1, dte1, l2, dte2);
129: return buffer;
130: }
131:
132:
133: int bridgerestore (tb, buffer, td)
134: register struct tsapblk *tb;
135: char *buffer;
136: struct TSAPdisconnect *td;
137: {
138: int fd;
139: char dte1[NSAP_DTELEN + 1],
140: dte2[NSAP_DTELEN + 1];
141: register struct NSAPaddr *na;
142: register struct tsapADDR *ta;
143:
144: if (sscanf (buffer, "%d %s %s", &fd, dte1, dte2) != 3 || fd < 0)
145: return tsaplose (td, DR_PARAMETER, NULLCP,
146: "bad initialization vector \"%s\"", buffer);
147:
148: ta = &tb -> tb_initiating;
149: ta -> ta_present = 1;
150: na = &ta -> ta_addr;
151: na -> na_stack = NA_BRG;
152: na -> na_community = ts_comm_x25_default;
153: bcopy(dte1, na -> na_dte, strlen(dte1));
154: na -> na_dtelen = strlen (na -> na_dte);
155:
156: tb -> tb_fd = fd;
157: (void) BTService (tb);
158:
159: ta = &tb -> tb_responding;
160: ta -> ta_present = 1;
161: na = &ta -> ta_addr;
162: na -> na_stack = NA_BRG;
163: na -> na_community = ts_comm_x25_default;
164: bcopy(dte1, na -> na_dte, strlen(dte2));
165: na -> na_dtelen = strlen (na -> na_dte);
166:
167: return OK;
168: }
169:
170: /* */
171:
172: int BTService (tb)
173: register struct tsapblk *tb;
174: {
175: tb -> tb_flags |= TB_BRG;
176:
177: tb -> tb_tsdusize = MAXNSDU - (tb -> tb_tpduslop = DT_MAGIC);
178:
179: tb -> tb_retryfnx = bridgeretry;
180:
181: tb -> tb_initfnx = bridgeinit;
182: tb -> tb_readfnx = bridgeread;
183: tb -> tb_writefnx = tp0write;
184: tb -> tb_closefnx = close_bridge_socket;
185: tb -> tb_selectfnx = select_bridge_socket;
186:
187: tp0init (tb);
188: }
189: #endif
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