Commit | Line | Data |
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8ae0e4b4 | 1 | /* |
240edf1f KS |
2 | * Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California. |
3 | * All rights reserved. | |
8ae0e4b4 | 4 | * |
240edf1f KS |
5 | * Redistribution and use in source and binary forms are permitted |
6 | * provided that this notice is preserved and that due credit is given | |
7 | * to the University of California at Berkeley. The name of the University | |
8 | * may not be used to endorse or promote products derived from this | |
9 | * software without specific prior written permission. This software | |
10 | * is provided ``as is'' without express or implied warranty. | |
11 | * | |
12 | * @(#)ns_pcb.c 7.3 (Berkeley) %G% | |
8ae0e4b4 | 13 | */ |
2d433de1 KS |
14 | |
15 | #include "param.h" | |
16 | #include "systm.h" | |
17 | #include "dir.h" | |
18 | #include "user.h" | |
19 | #include "mbuf.h" | |
20 | #include "socket.h" | |
21 | #include "socketvar.h" | |
22 | #include "../net/if.h" | |
23 | #include "../net/route.h" | |
24 | #include "protosw.h" | |
25 | ||
26 | #include "ns.h" | |
27 | #include "ns_if.h" | |
28 | #include "ns_pcb.h" | |
29 | ||
30 | struct ns_addr zerons_addr; | |
31 | ||
32 | ns_pcballoc(so, head) | |
33 | struct socket *so; | |
f97be0c9 | 34 | struct nspcb *head; |
2d433de1 KS |
35 | { |
36 | struct mbuf *m; | |
37 | register struct nspcb *nsp; | |
38 | ||
39 | m = m_getclr(M_DONTWAIT, MT_PCB); | |
40 | if (m == NULL) | |
41 | return (ENOBUFS); | |
42 | nsp = mtod(m, struct nspcb *); | |
43 | nsp->nsp_socket = so; | |
44 | insque(nsp, head); | |
45 | so->so_pcb = (caddr_t)nsp; | |
46 | return (0); | |
47 | } | |
48 | ||
49 | ns_pcbbind(nsp, nam) | |
50 | register struct nspcb *nsp; | |
51 | struct mbuf *nam; | |
52 | { | |
53 | register struct sockaddr_ns *sns; | |
54 | u_short lport = 0; | |
55 | ||
56 | if(nsp->nsp_lport || !ns_nullhost(nsp->nsp_laddr)) | |
57 | return (EINVAL); | |
58 | if (nam == 0) | |
59 | goto noname; | |
60 | sns = mtod(nam, struct sockaddr_ns *); | |
61 | if (nam->m_len != sizeof (*sns)) | |
62 | return (EINVAL); | |
63 | if (!ns_nullhost(sns->sns_addr)) { | |
64 | int tport = sns->sns_port; | |
65 | ||
66 | sns->sns_port = 0; /* yech... */ | |
67 | if (ifa_ifwithaddr((struct sockaddr *)sns) == 0) | |
68 | return (EADDRNOTAVAIL); | |
69 | sns->sns_port = tport; | |
70 | } | |
71 | lport = sns->sns_port; | |
72 | if (lport) { | |
73 | u_short aport = ntohs(lport); | |
74 | ||
75 | if (aport < NSPORT_RESERVED && u.u_uid != 0) | |
76 | return (EACCES); | |
77 | if (ns_pcblookup(&zerons_addr, lport, 0)) | |
78 | return (EADDRINUSE); | |
79 | } | |
80 | nsp->nsp_laddr = sns->sns_addr; | |
81 | noname: | |
82 | if (lport == 0) | |
83 | do { | |
84 | if (nspcb.nsp_lport++ < NSPORT_RESERVED) | |
85 | nspcb.nsp_lport = NSPORT_RESERVED; | |
86 | lport = htons(nspcb.nsp_lport); | |
87 | } while (ns_pcblookup(&zerons_addr, lport, 0)); | |
88 | nsp->nsp_lport = lport; | |
89 | return (0); | |
90 | } | |
91 | ||
92 | /* | |
93 | * Connect from a socket to a specified address. | |
94 | * Both address and port must be specified in argument sns. | |
95 | * If don't have a local address for this socket yet, | |
96 | * then pick one. | |
97 | */ | |
98 | ns_pcbconnect(nsp, nam) | |
99 | struct nspcb *nsp; | |
100 | struct mbuf *nam; | |
101 | { | |
102 | struct ns_ifaddr *ia; | |
2d433de1 | 103 | register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *); |
6d22baac | 104 | struct sockaddr_ns *ifaddr; |
aa6e5222 | 105 | register struct ns_addr *dst; |
2d433de1 KS |
106 | |
107 | if (nam->m_len != sizeof (*sns)) | |
108 | return (EINVAL); | |
109 | if (sns->sns_family != AF_NS) | |
110 | return (EAFNOSUPPORT); | |
111 | if (sns->sns_port==0 || ns_nullhost(sns->sns_addr)) | |
112 | return (EADDRNOTAVAIL); | |
6d22baac | 113 | if (ns_nullhost(nsp->nsp_laddr)) { |
aa6e5222 KS |
114 | register struct route *ro; |
115 | struct ifnet *ifp; | |
6d22baac MK |
116 | /* |
117 | * If route is known or can be allocated now, | |
118 | * our src addr is taken from the i/f, else punt. | |
119 | */ | |
aa6e5222 KS |
120 | ro = &nsp->nsp_route; |
121 | dst = &satons_addr(ro->ro_dst); | |
2d433de1 | 122 | |
6d22baac MK |
123 | ia = (struct ns_ifaddr *)0; |
124 | if (ro->ro_rt) { | |
125 | if ((!ns_neteq(nsp->nsp_lastdst, sns->sns_addr)) || | |
126 | ((ifp = ro->ro_rt->rt_ifp) && | |
127 | (ifp->if_flags & IFF_POINTOPOINT) && | |
128 | (!ns_hosteq(nsp->nsp_lastdst, sns->sns_addr))) || | |
129 | (nsp->nsp_socket->so_options & SO_DONTROUTE)) { | |
2d433de1 KS |
130 | RTFREE(ro->ro_rt); |
131 | ro->ro_rt = (struct rtentry *)0; | |
132 | } | |
6d22baac MK |
133 | } |
134 | if ((nsp->nsp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ | |
135 | (ro->ro_rt == (struct rtentry *)0 || | |
136 | ro->ro_rt->rt_ifp == (struct ifnet *)0)) { | |
137 | /* No route yet, so try to acquire one */ | |
138 | ro->ro_dst.sa_family = AF_NS; | |
139 | *dst = sns->sns_addr; | |
140 | dst->x_port = 0; | |
141 | rtalloc(ro); | |
142 | } | |
143 | /* | |
144 | * If we found a route, use the address | |
145 | * corresponding to the outgoing interface | |
146 | */ | |
147 | if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp)) | |
148 | for (ia = ns_ifaddr; ia; ia = ia->ia_next) | |
149 | if (ia->ia_ifp == ifp) | |
150 | break; | |
151 | if (ia == 0) { | |
152 | u_short fport = sns->sns_addr.x_port; | |
153 | sns->sns_addr.x_port = 0; | |
154 | ia = (struct ns_ifaddr *) | |
155 | ifa_ifwithdstaddr((struct sockaddr *)sns); | |
156 | sns->sns_addr.x_port = fport; | |
157 | if (ia == 0) | |
158 | ia = ns_iaonnetof(&sns->sns_addr); | |
2d433de1 KS |
159 | if (ia == 0) |
160 | ia = ns_ifaddr; | |
161 | if (ia == 0) | |
162 | return (EADDRNOTAVAIL); | |
163 | } | |
aa6e5222 KS |
164 | nsp->nsp_laddr.x_net = satons_addr(ia->ia_addr).x_net; |
165 | nsp->nsp_lastdst = sns->sns_addr; | |
2d433de1 KS |
166 | } |
167 | if (ns_pcblookup(&sns->sns_addr, nsp->nsp_lport, 0)) | |
168 | return (EADDRINUSE); | |
169 | if (ns_nullhost(nsp->nsp_laddr)) { | |
170 | if (nsp->nsp_lport == 0) | |
f97be0c9 | 171 | (void) ns_pcbbind(nsp, (struct mbuf *)0); |
2d433de1 KS |
172 | nsp->nsp_laddr.x_host = ns_thishost; |
173 | } | |
174 | nsp->nsp_faddr = sns->sns_addr; | |
175 | /* Includes nsp->nsp_fport = sns->sns_port; */ | |
176 | return (0); | |
177 | } | |
178 | ||
179 | ns_pcbdisconnect(nsp) | |
180 | struct nspcb *nsp; | |
181 | { | |
182 | ||
183 | nsp->nsp_faddr = zerons_addr; | |
184 | if (nsp->nsp_socket->so_state & SS_NOFDREF) | |
185 | ns_pcbdetach(nsp); | |
186 | } | |
187 | ||
188 | ns_pcbdetach(nsp) | |
189 | struct nspcb *nsp; | |
190 | { | |
191 | struct socket *so = nsp->nsp_socket; | |
192 | ||
193 | so->so_pcb = 0; | |
194 | sofree(so); | |
195 | if (nsp->nsp_route.ro_rt) | |
196 | rtfree(nsp->nsp_route.ro_rt); | |
197 | remque(nsp); | |
198 | (void) m_free(dtom(nsp)); | |
199 | } | |
200 | ||
201 | ns_setsockaddr(nsp, nam) | |
202 | register struct nspcb *nsp; | |
203 | struct mbuf *nam; | |
204 | { | |
205 | register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *); | |
206 | ||
207 | nam->m_len = sizeof (*sns); | |
208 | sns = mtod(nam, struct sockaddr_ns *); | |
209 | bzero((caddr_t)sns, sizeof (*sns)); | |
210 | sns->sns_family = AF_NS; | |
211 | sns->sns_addr = nsp->nsp_laddr; | |
212 | } | |
213 | ||
214 | ns_setpeeraddr(nsp, nam) | |
215 | register struct nspcb *nsp; | |
216 | struct mbuf *nam; | |
217 | { | |
218 | register struct sockaddr_ns *sns = mtod(nam, struct sockaddr_ns *); | |
219 | ||
220 | nam->m_len = sizeof (*sns); | |
221 | sns = mtod(nam, struct sockaddr_ns *); | |
222 | bzero((caddr_t)sns, sizeof (*sns)); | |
223 | sns->sns_family = AF_NS; | |
224 | sns->sns_addr = nsp->nsp_faddr; | |
225 | } | |
226 | ||
227 | /* | |
228 | * Pass some notification to all connections of a protocol | |
229 | * associated with address dst. Call the | |
230 | * protocol specific routine to handle each connection. | |
231 | * Also pass an extra paramter via the nspcb. (which may in fact | |
232 | * be a parameter list!) | |
233 | */ | |
234 | ns_pcbnotify(dst, errno, notify, param) | |
235 | register struct ns_addr *dst; | |
236 | long param; | |
237 | int errno, (*notify)(); | |
238 | { | |
239 | register struct nspcb *nsp, *oinp; | |
240 | int s = splimp(); | |
241 | ||
242 | for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb);) { | |
243 | if (!ns_hosteq(*dst,nsp->nsp_faddr)) { | |
244 | next: | |
245 | nsp = nsp->nsp_next; | |
246 | continue; | |
247 | } | |
248 | if (nsp->nsp_socket == 0) | |
249 | goto next; | |
250 | if (errno) | |
251 | nsp->nsp_socket->so_error = errno; | |
252 | oinp = nsp; | |
253 | nsp = nsp->nsp_next; | |
254 | oinp->nsp_notify_param = param; | |
255 | (*notify)(oinp); | |
256 | } | |
257 | splx(s); | |
258 | } | |
259 | ||
58bca61d | 260 | #ifdef notdef |
2d433de1 KS |
261 | /* |
262 | * After a routing change, flush old routing | |
263 | * and allocate a (hopefully) better one. | |
264 | */ | |
265 | ns_rtchange(nsp) | |
266 | struct nspcb *nsp; | |
267 | { | |
268 | if (nsp->nsp_route.ro_rt) { | |
269 | rtfree(nsp->nsp_route.ro_rt); | |
270 | nsp->nsp_route.ro_rt = 0; | |
271 | /* | |
272 | * A new route can be allocated the next time | |
273 | * output is attempted. | |
274 | */ | |
275 | } | |
276 | /* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ | |
277 | } | |
58bca61d | 278 | #endif |
2d433de1 KS |
279 | |
280 | struct nspcb * | |
281 | ns_pcblookup(faddr, lport, wildp) | |
282 | struct ns_addr *faddr; | |
283 | u_short lport; | |
284 | { | |
285 | register struct nspcb *nsp, *match = 0; | |
286 | int matchwild = 3, wildcard; | |
287 | u_short fport; | |
288 | ||
289 | fport = faddr->x_port; | |
290 | for (nsp = (&nspcb)->nsp_next; nsp != (&nspcb); nsp = nsp->nsp_next) { | |
291 | if (nsp->nsp_lport != lport) | |
292 | continue; | |
293 | wildcard = 0; | |
294 | if (ns_nullhost(nsp->nsp_faddr)) { | |
295 | if (!ns_nullhost(*faddr)) | |
296 | wildcard++; | |
297 | } else { | |
298 | if (ns_nullhost(*faddr)) | |
299 | wildcard++; | |
300 | else { | |
301 | if (!ns_hosteq(nsp->nsp_faddr, *faddr)) | |
302 | continue; | |
303 | if( nsp->nsp_fport != fport) { | |
304 | if(nsp->nsp_fport != 0) | |
305 | continue; | |
306 | else | |
307 | wildcard++; | |
308 | } | |
309 | } | |
310 | } | |
311 | if (wildcard && wildp==0) | |
312 | continue; | |
313 | if (wildcard < matchwild) { | |
314 | match = nsp; | |
315 | matchwild = wildcard; | |
316 | if (wildcard == 0) | |
317 | break; | |
318 | } | |
319 | } | |
320 | return (match); | |
321 | } |