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47f37345 KS |
1 | /*********************************************************** |
2 | Copyright IBM Corporation 1987 | |
3 | ||
4 | All Rights Reserved | |
5 | ||
6 | Permission to use, copy, modify, and distribute this software and its | |
7 | documentation for any purpose and without fee is hereby granted, | |
8 | provided that the above copyright notice appear in all copies and that | |
9 | both that copyright notice and this permission notice appear in | |
10 | supporting documentation, and that the name of IBM not be | |
11 | used in advertising or publicity pertaining to distribution of the | |
12 | software without specific, written prior permission. | |
13 | ||
14 | IBM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |
15 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |
16 | IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |
17 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |
18 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |
19 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
20 | SOFTWARE. | |
21 | ||
22 | ******************************************************************/ | |
23 | ||
24 | /* | |
25 | * ARGO Project, Computer Sciences Dept., University of Wisconsin - Madison | |
26 | */ | |
27 | /* | |
28 | * ARGO TP | |
29 | * $Header: tp_cons.c,v 5.6 88/11/18 17:27:13 nhall Exp $ | |
30 | * $Source: /usr/argo/sys/netiso/RCS/tp_cons.c,v $ | |
194a383a | 31 | * @(#)tp_cons.c 7.4 (Berkeley) %G% * |
47f37345 | 32 | * |
194a383a | 33 | * Here is where you find the iso- and cons-dependent code. We've tried |
47f37345 KS |
34 | * keep all net-level and (primarily) address-family-dependent stuff |
35 | * out of the tp source, and everthing here is reached indirectly | |
36 | * through a switch table (struct nl_protosw *) tpcb->tp_nlproto | |
37 | * (see tp_pcb.c). | |
38 | * The routines here are: | |
39 | * tpcons_mtu: figure out what size tpdu to use | |
40 | * tpcons_input: pullup and call tp_input w/ correct arguments | |
47f37345 KS |
41 | * tpcons_output: package a pkt for cons given an isopcb & some data |
42 | * cons_chan_to_tpcb: find a tpcb based on the channel # | |
43 | */ | |
44 | ||
45 | #ifndef lint | |
46 | static char *rcsid = "$Header: tp_cons.c,v 5.6 88/11/18 17:27:13 nhall Exp $"; | |
47 | #endif lint | |
48 | ||
47f37345 KS |
49 | |
50 | #ifdef ISO | |
194a383a | 51 | #ifdef TPCONS |
47f37345 | 52 | |
a50e2bc0 | 53 | #include "param.h" |
47f37345 KS |
54 | #include "socket.h" |
55 | #include "domain.h" | |
56 | #include "mbuf.h" | |
57 | #include "errno.h" | |
58 | #include "time.h" | |
194a383a | 59 | |
47f37345 | 60 | #include "../net/if.h" |
194a383a | 61 | #include "../net/route.h" |
47f37345 | 62 | |
a50e2bc0 KS |
63 | #include "tp_param.h" |
64 | #include "argo_debug.h" | |
65 | #include "tp_stat.h" | |
66 | #include "tp_pcb.h" | |
67 | #include "tp_trace.h" | |
68 | #include "tp_stat.h" | |
69 | #include "tp_tpdu.h" | |
a50e2bc0 | 70 | #include "iso.h" |
194a383a | 71 | #include "iso_errno.h" |
a50e2bc0 KS |
72 | #include "iso_pcb.h" |
73 | #include "cons.h" | |
74 | #include "tp_seq.h" | |
47f37345 | 75 | |
194a383a KS |
76 | #undef FALSE |
77 | #undef TRUE | |
78 | #include "../netccitt/x25.h" | |
79 | #include "../netccitt/pk.h" | |
80 | #include "../netccitt/pk_var.h" | |
81 | ||
82 | #include "if_cons.c" | |
47f37345 KS |
83 | int tpcons_output(); |
84 | ||
194a383a KS |
85 | /* |
86 | * CALLED FROM: | |
87 | * tp_route_to() for PRU_CONNECT | |
88 | * FUNCTION, ARGUMENTS, SIDE EFFECTS and RETURN VALUE: | |
89 | * version of the previous procedure for X.25 | |
90 | */ | |
91 | ||
92 | tpcons_pcbconnect(isop, nam) | |
93 | struct isopcb *isop; | |
94 | register struct mbuf *nam; | |
95 | { | |
96 | int error; | |
97 | if (error = iso_pcbconnect(isop, nam)) | |
98 | return error; | |
99 | if ((isop->isop_chan = (caddr_t) pk_attach((struct socket *)0)) == 0) { | |
100 | IFDEBUG(D_CCONS) | |
101 | printf("tpcons_pcbconnect: no pklcd; returns 0x%x\n", error); | |
102 | ENDDEBUG | |
103 | return ENOBUFS; | |
104 | } | |
105 | if (error = cons_connect(isop)) { /* if it doesn't work */ | |
106 | /* oh, dear, throw packet away */ | |
107 | pk_disconnect((struct pklcd *)isop->isop_chan); | |
108 | isop->isop_chan = 0; | |
109 | return error; | |
110 | } | |
111 | } | |
112 | ||
113 | ||
47f37345 KS |
114 | /* |
115 | * CALLED FROM: | |
116 | * tp_input() on incoming CR, CC, and pr_usrreq() for PRU_CONNECT | |
117 | * FUNCTION, ARGUMENTS, SIDE EFFECTS and RETURN VALUE: | |
118 | * version of the previous procedure for X.25 | |
119 | */ | |
120 | ||
121 | void | |
122 | tpcons_mtu(so, isop, size, negot) | |
123 | struct socket *so; | |
124 | struct isopcb *isop; | |
125 | int *size; | |
126 | u_char *negot; | |
127 | { | |
128 | register struct ifnet *ifp; | |
194a383a | 129 | register int i=0, isize; |
47f37345 | 130 | int windowsize = so->so_rcv.sb_hiwat; |
47f37345 KS |
131 | |
132 | IFTRACE(D_CONN) | |
133 | tptrace(TPPTmisc, "ENTER GET MTU: size negot ",*size, *negot, 0, 0); | |
134 | ENDTRACE | |
135 | ||
194a383a KS |
136 | isize = *size = 1 << *negot; |
137 | #ifdef ancient_history | |
47f37345 KS |
138 | if ((ifp = iso_routeifp(&isop->isop_faddr)) == (struct ifnet *)0) |
139 | return; | |
194a383a | 140 | #endif |
47f37345 | 141 | |
194a383a KS |
142 | if (isize > windowsize) { |
143 | isize = windowsize; | |
47f37345 KS |
144 | i++; |
145 | } | |
194a383a KS |
146 | if (isize > ifp->if_mtu) { |
147 | isize = ifp->if_mtu; | |
47f37345 KS |
148 | i++; |
149 | } | |
194a383a | 150 | if (i) { |
47f37345 KS |
151 | /* size was changed by this routine - have to transform it to |
152 | * the log2 of size | |
153 | */ | |
194a383a KS |
154 | for (i = TP_MIN_TPDUSIZE; i < TP_MAX_TPDUSIZE; i++) { |
155 | if (isize < (1 << (1 + i))) | |
156 | break; | |
47f37345 KS |
157 | } |
158 | *negot = i; | |
194a383a | 159 | *size = 1 << i; |
47f37345 KS |
160 | } |
161 | ||
162 | IFDEBUG(D_CONN) | |
163 | printf("GET MTU RETURNS: ifp %s size 0x%x negot 0x%x\n", | |
164 | ifp->if_name, *size, *negot); | |
165 | ENDDEBUG | |
166 | IFTRACE(D_CONN) | |
167 | tptrace(TPPTmisc, "EXIT GET MTU: tpcb size negot ", | |
168 | *size, *negot, 0, 0); | |
169 | ENDTRACE | |
170 | } | |
171 | ||
172 | /* | |
173 | * CALLED FROM: | |
174 | * cons | |
175 | * FUNCTION and ARGUMENTS: | |
176 | * THIS MAYBE BELONGS IN SOME OTHER PLACE??? but i think not - | |
177 | */ | |
178 | ProtoHook | |
179 | tpcons_ctlinput(cmd, siso, isop) | |
180 | int cmd; | |
181 | struct sockaddr_iso *siso; | |
182 | struct isopcb *isop; | |
183 | { | |
184 | switch (cmd) { | |
185 | ||
186 | case PRC_CONS_SEND_DONE: | |
187 | if( isop->isop_socket ) { /* tp 0 only */ | |
188 | register struct tp_pcb *tpcb = | |
189 | (struct tp_pcb *)isop->isop_socket->so_tpcb; | |
190 | struct tp_event E; | |
191 | int error = 0; | |
192 | ||
193 | if( tpcb->tp_class == TP_CLASS_0 ) { | |
194 | /* only if class is exactly class zero, not | |
195 | * still in class negotiation | |
196 | */ | |
197 | /* fake an ack */ | |
198 | register SeqNum seq = SEQ_ADD(tpcb, tpcb->tp_snduna, 1); | |
199 | ||
200 | IFTRACE(D_DATA) | |
201 | tptrace(TPPTmisc, "FAKE ACK seq cdt 1", | |
202 | seq, 0,0,0); | |
203 | ENDTRACE | |
204 | IFDEBUG(D_DATA) | |
205 | printf("FAKE ACK seq 0x%x cdt 1\n", seq ); | |
206 | ENDDEBUG | |
207 | E.ATTR(AK_TPDU).e_cdt = 1; | |
208 | E.ATTR(AK_TPDU).e_seq = seq; | |
209 | E.ATTR(AK_TPDU).e_subseq = 0; | |
210 | E.ATTR(AK_TPDU).e_fcc_present = 0; | |
211 | error = DoEvent(AK_TPDU); | |
212 | if( error ) { | |
213 | tpcb->tp_sock->so_error = error; | |
214 | } | |
215 | } /* else ignore it */ | |
216 | } | |
217 | break; | |
218 | case PRC_ROUTEDEAD: | |
219 | if( isop->isop_socket ) { /* tp 0 only */ | |
220 | tpiso_reset(isop); | |
221 | break; | |
222 | } /* else drop through */ | |
223 | default: | |
224 | (void) tpclnp_ctlinput(cmd, siso); | |
225 | break; | |
226 | } | |
227 | return 0; | |
228 | } | |
229 | ||
230 | /* | |
231 | * CALLED FROM: | |
232 | * cons's intr routine | |
233 | * FUNCTION and ARGUMENTS: | |
234 | * Take a packet (m) from cons, pullup m as required by tp, | |
235 | * ignore the socket argument, and call tp_input. | |
236 | * No return value. | |
237 | */ | |
238 | ProtoHook | |
194a383a | 239 | tpcons_input(m, faddr, laddr, channel) |
47f37345 KS |
240 | struct mbuf *m; |
241 | struct sockaddr_iso *faddr, *laddr; | |
194a383a | 242 | caddr_t channel; |
47f37345 KS |
243 | { |
244 | if( m == MNULL) | |
245 | return 0; | |
246 | ||
247 | m = (struct mbuf *)tp_inputprep(m); | |
248 | ||
249 | IFDEBUG(D_TPINPUT) | |
250 | printf("tpcons_input before tp_input(m 0x%x)\n", m); | |
251 | dump_buf( m, 12+ m->m_len); | |
252 | ENDDEBUG | |
253 | tp_input(m, faddr, laddr, channel, tpcons_output); | |
254 | return 0; | |
255 | } | |
256 | ||
257 | ||
258 | /* | |
259 | * CALLED FROM: | |
260 | * tp_emit() | |
261 | * FUNCTION and ARGUMENTS: | |
262 | * Take a packet(m0) from tp and package it so that cons will accept it. | |
263 | * This means filling in a few of the fields. | |
264 | * inp is the isopcb structure; datalen is the length of the data in the | |
265 | * mbuf string m0. | |
266 | * RETURN VALUE: | |
267 | * whatever (E*) is returned form the net layer output routine. | |
268 | */ | |
269 | ||
270 | int | |
271 | tpcons_output(isop, m0, datalen, nochksum) | |
272 | struct isopcb *isop; | |
273 | struct mbuf *m0; | |
274 | int datalen; | |
275 | int nochksum; | |
276 | { | |
194a383a | 277 | register struct mbuf *m = m0; |
47f37345 KS |
278 | int error; |
279 | ||
280 | IFDEBUG(D_EMIT) | |
281 | printf( | |
282 | "tpcons_output(isop 0x%x, m 0x%x, len 0x%x socket 0x%x\n", | |
283 | isop, m0, datalen, isop->isop_socket); | |
284 | ENDDEBUG | |
194a383a | 285 | if (m == MNULL) |
47f37345 | 286 | return 0; |
194a383a KS |
287 | if (m->m_flags & M_PKTHDR == 0) { |
288 | MGETHDR(m, M_DONTWAIT, MT_DATA); | |
289 | if (m == 0) | |
290 | return ENOBUFS; | |
291 | m->m_next = m0; | |
292 | } | |
293 | m->m_pkthdr.len = datalen; | |
294 | error = pk_send(isop->isop_chan, m); | |
47f37345 KS |
295 | IncStat(ts_tpdu_sent); |
296 | ||
47f37345 KS |
297 | return error; |
298 | } | |
47f37345 KS |
299 | /* |
300 | * CALLED FROM: | |
301 | * tp_error_emit() | |
302 | * FUNCTION and ARGUMENTS: | |
194a383a KS |
303 | * Take a packet(m0) from tp and package it so that cons will accept it. |
304 | * chan is the cons channel to use; datalen is the length of the data in the | |
305 | * mbuf string m0. | |
47f37345 | 306 | * RETURN VALUE: |
47f37345 KS |
307 | * whatever (E*) is returned form the net layer output routine. |
308 | */ | |
309 | ||
310 | int | |
194a383a KS |
311 | tpcons_dg_output(chan, m0, datalen) |
312 | caddr_t chan; | |
47f37345 KS |
313 | struct mbuf *m0; |
314 | int datalen; | |
47f37345 | 315 | { |
194a383a | 316 | return tpcons_output(((struct pklcd *)chan)->lcd_upnext, m0, datalen, 0); |
47f37345 | 317 | } |
194a383a | 318 | #endif TPCONS |
47f37345 | 319 | #endif ISO |