Commit | Line | Data |
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8ae0e4b4 | 1 | /* |
0880b18e | 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
2b6b6284 | 3 | * All rights reserved. |
8ae0e4b4 | 4 | * |
2b6b6284 | 5 | * Redistribution and use in source and binary forms are permitted |
616d42db KB |
6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
2b6b6284 | 16 | * |
9d91b170 | 17 | * @(#)in_pcb.c 7.8 (Berkeley) %G% |
8ae0e4b4 | 18 | */ |
af092e86 | 19 | |
20666ad3 JB |
20 | #include "param.h" |
21 | #include "systm.h" | |
22 | #include "dir.h" | |
23 | #include "user.h" | |
9d91b170 | 24 | #include "malloc.h" |
20666ad3 JB |
25 | #include "mbuf.h" |
26 | #include "socket.h" | |
27 | #include "socketvar.h" | |
2ba2de86 | 28 | #include "ioctl.h" |
20666ad3 JB |
29 | #include "in.h" |
30 | #include "in_systm.h" | |
4ad99bae | 31 | #include "../net/if.h" |
c124e997 | 32 | #include "../net/route.h" |
20666ad3 | 33 | #include "in_pcb.h" |
5d305bdd | 34 | #include "in_var.h" |
20666ad3 | 35 | #include "protosw.h" |
af092e86 | 36 | |
1a3dbf93 | 37 | struct in_addr zeroin_addr; |
405c9168 | 38 | |
8f0d18de BJ |
39 | in_pcballoc(so, head) |
40 | struct socket *so; | |
41 | struct inpcb *head; | |
42 | { | |
43 | struct mbuf *m; | |
44 | register struct inpcb *inp; | |
45 | ||
cce93e4b | 46 | m = m_getclr(M_DONTWAIT, MT_PCB); |
5cdc4d65 | 47 | if (m == NULL) |
8f0d18de BJ |
48 | return (ENOBUFS); |
49 | inp = mtod(m, struct inpcb *); | |
50 | inp->inp_head = head; | |
51 | inp->inp_socket = so; | |
52 | insque(inp, head); | |
53 | so->so_pcb = (caddr_t)inp; | |
54 | return (0); | |
55 | } | |
56 | ||
8075bb0e | 57 | in_pcbbind(inp, nam) |
8f0d18de | 58 | register struct inpcb *inp; |
8075bb0e | 59 | struct mbuf *nam; |
8f0d18de BJ |
60 | { |
61 | register struct socket *so = inp->inp_socket; | |
62 | register struct inpcb *head = inp->inp_head; | |
8075bb0e | 63 | register struct sockaddr_in *sin; |
8f0d18de BJ |
64 | u_short lport = 0; |
65 | ||
5d305bdd | 66 | if (in_ifaddr == 0) |
8f0d18de | 67 | return (EADDRNOTAVAIL); |
5cdc4d65 | 68 | if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY) |
8075bb0e BJ |
69 | return (EINVAL); |
70 | if (nam == 0) | |
71 | goto noname; | |
72 | sin = mtod(nam, struct sockaddr_in *); | |
73 | if (nam->m_len != sizeof (*sin)) | |
74 | return (EINVAL); | |
5cdc4d65 | 75 | if (sin->sin_addr.s_addr != INADDR_ANY) { |
8075bb0e | 76 | int tport = sin->sin_port; |
8f0d18de | 77 | |
8075bb0e | 78 | sin->sin_port = 0; /* yech... */ |
5d305bdd | 79 | if (ifa_ifwithaddr((struct sockaddr *)sin) == 0) |
8075bb0e BJ |
80 | return (EADDRNOTAVAIL); |
81 | sin->sin_port = tport; | |
8f0d18de | 82 | } |
8075bb0e BJ |
83 | lport = sin->sin_port; |
84 | if (lport) { | |
f2d10020 | 85 | u_short aport = ntohs(lport); |
8075bb0e | 86 | int wild = 0; |
c124e997 | 87 | |
8075bb0e BJ |
88 | /* GROSS */ |
89 | if (aport < IPPORT_RESERVED && u.u_uid != 0) | |
90 | return (EACCES); | |
b4a3d4a7 SL |
91 | /* even GROSSER, but this is the Internet */ |
92 | if ((so->so_options & SO_REUSEADDR) == 0 && | |
93 | ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || | |
94 | (so->so_options & SO_ACCEPTCONN) == 0)) | |
8075bb0e BJ |
95 | wild = INPLOOKUP_WILDCARD; |
96 | if (in_pcblookup(head, | |
97 | zeroin_addr, 0, sin->sin_addr, lport, wild)) | |
98 | return (EADDRINUSE); | |
4ad99bae | 99 | } |
8075bb0e BJ |
100 | inp->inp_laddr = sin->sin_addr; |
101 | noname: | |
b454c3ea BJ |
102 | if (lport == 0) |
103 | do { | |
f44e5691 MK |
104 | if (head->inp_lport++ < IPPORT_RESERVED || |
105 | head->inp_lport > IPPORT_USERRESERVED) | |
1aa87517 | 106 | head->inp_lport = IPPORT_RESERVED; |
b454c3ea | 107 | lport = htons(head->inp_lport); |
1aa87517 BJ |
108 | } while (in_pcblookup(head, |
109 | zeroin_addr, 0, inp->inp_laddr, lport, 0)); | |
4ad99bae | 110 | inp->inp_lport = lport; |
4ad99bae | 111 | return (0); |
af092e86 BJ |
112 | } |
113 | ||
1acff8ec BJ |
114 | /* |
115 | * Connect from a socket to a specified address. | |
116 | * Both address and port must be specified in argument sin. | |
117 | * If don't have a local address for this socket yet, | |
118 | * then pick one. | |
119 | */ | |
8075bb0e | 120 | in_pcbconnect(inp, nam) |
552daad2 | 121 | register struct inpcb *inp; |
8075bb0e | 122 | struct mbuf *nam; |
2b4b57cd | 123 | { |
5d305bdd | 124 | struct in_ifaddr *ia; |
ee787340 | 125 | struct sockaddr_in *ifaddr; |
8075bb0e | 126 | register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); |
2b4b57cd | 127 | |
8075bb0e BJ |
128 | if (nam->m_len != sizeof (*sin)) |
129 | return (EINVAL); | |
4ad99bae BJ |
130 | if (sin->sin_family != AF_INET) |
131 | return (EAFNOSUPPORT); | |
5d305bdd | 132 | if (sin->sin_port == 0) |
4ad99bae | 133 | return (EADDRNOTAVAIL); |
5d305bdd | 134 | if (in_ifaddr) { |
3f319daa MK |
135 | /* |
136 | * If the destination address is INADDR_ANY, | |
137 | * use the primary local address. | |
138 | * If the supplied address is INADDR_BROADCAST, | |
139 | * and the primary interface supports broadcast, | |
140 | * choose the broadcast address for that interface. | |
141 | */ | |
5d305bdd MK |
142 | #define satosin(sa) ((struct sockaddr_in *)(sa)) |
143 | if (sin->sin_addr.s_addr == INADDR_ANY) | |
3f319daa | 144 | sin->sin_addr = IA_SIN(in_ifaddr)->sin_addr; |
c9aca561 | 145 | else if (sin->sin_addr.s_addr == (u_long)INADDR_BROADCAST && |
3f319daa MK |
146 | (in_ifaddr->ia_ifp->if_flags & IFF_BROADCAST)) |
147 | sin->sin_addr = satosin(&in_ifaddr->ia_broadaddr)->sin_addr; | |
5d305bdd | 148 | } |
5cdc4d65 | 149 | if (inp->inp_laddr.s_addr == INADDR_ANY) { |
c198b4ed MK |
150 | register struct route *ro; |
151 | struct ifnet *ifp; | |
99578149 | 152 | |
c198b4ed MK |
153 | ia = (struct in_ifaddr *)0; |
154 | /* | |
155 | * If route is known or can be allocated now, | |
156 | * our src addr is taken from the i/f, else punt. | |
157 | */ | |
158 | ro = &inp->inp_route; | |
159 | if (ro->ro_rt && | |
1bf75d4e MK |
160 | (satosin(&ro->ro_dst)->sin_addr.s_addr != |
161 | sin->sin_addr.s_addr || | |
162 | inp->inp_socket->so_options & SO_DONTROUTE)) { | |
c198b4ed MK |
163 | RTFREE(ro->ro_rt); |
164 | ro->ro_rt = (struct rtentry *)0; | |
165 | } | |
9f21d23f MK |
166 | if ((inp->inp_socket->so_options & SO_DONTROUTE) == 0 && /*XXX*/ |
167 | (ro->ro_rt == (struct rtentry *)0 || | |
d4538fe2 | 168 | ro->ro_rt->rt_ifp == (struct ifnet *)0)) { |
c198b4ed MK |
169 | /* No route yet, so try to acquire one */ |
170 | ro->ro_dst.sa_family = AF_INET; | |
171 | ((struct sockaddr_in *) &ro->ro_dst)->sin_addr = | |
172 | sin->sin_addr; | |
173 | rtalloc(ro); | |
ee787340 | 174 | } |
d4538fe2 MK |
175 | /* |
176 | * If we found a route, use the address | |
177 | * corresponding to the outgoing interface | |
178 | * unless it is the loopback (in case a route | |
179 | * to our address on another net goes to loopback). | |
180 | */ | |
181 | if (ro->ro_rt && (ifp = ro->ro_rt->rt_ifp) && | |
182 | (ifp->if_flags & IFF_LOOPBACK) == 0) | |
183 | for (ia = in_ifaddr; ia; ia = ia->ia_next) | |
184 | if (ia->ia_ifp == ifp) | |
185 | break; | |
9f21d23f | 186 | if (ia == 0) { |
1bf75d4e MK |
187 | int fport = sin->sin_port; |
188 | ||
189 | sin->sin_port = 0; | |
9f21d23f MK |
190 | ia = (struct in_ifaddr *) |
191 | ifa_ifwithdstaddr((struct sockaddr *)sin); | |
1bf75d4e | 192 | sin->sin_port = fport; |
9f21d23f MK |
193 | if (ia == 0) |
194 | ia = in_iaonnetof(in_netof(sin->sin_addr)); | |
195 | if (ia == 0) | |
196 | ia = in_ifaddr; | |
197 | if (ia == 0) | |
198 | return (EADDRNOTAVAIL); | |
c198b4ed | 199 | } |
5d305bdd | 200 | ifaddr = (struct sockaddr_in *)&ia->ia_addr; |
1aa87517 BJ |
201 | } |
202 | if (in_pcblookup(inp->inp_head, | |
1acff8ec BJ |
203 | sin->sin_addr, |
204 | sin->sin_port, | |
ee787340 | 205 | inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr, |
1acff8ec BJ |
206 | inp->inp_lport, |
207 | 0)) | |
b454c3ea | 208 | return (EADDRINUSE); |
3cd2053b SL |
209 | if (inp->inp_laddr.s_addr == INADDR_ANY) { |
210 | if (inp->inp_lport == 0) | |
8011f5df | 211 | (void)in_pcbbind(inp, (struct mbuf *)0); |
ee787340 | 212 | inp->inp_laddr = ifaddr->sin_addr; |
3cd2053b | 213 | } |
4ad99bae BJ |
214 | inp->inp_faddr = sin->sin_addr; |
215 | inp->inp_fport = sin->sin_port; | |
2b4b57cd BJ |
216 | return (0); |
217 | } | |
218 | ||
405c9168 BJ |
219 | in_pcbdisconnect(inp) |
220 | struct inpcb *inp; | |
221 | { | |
222 | ||
5cdc4d65 | 223 | inp->inp_faddr.s_addr = INADDR_ANY; |
ebcadd38 | 224 | inp->inp_fport = 0; |
8f0d18de | 225 | if (inp->inp_socket->so_state & SS_NOFDREF) |
405c9168 BJ |
226 | in_pcbdetach(inp); |
227 | } | |
228 | ||
229 | in_pcbdetach(inp) | |
af092e86 BJ |
230 | struct inpcb *inp; |
231 | { | |
232 | struct socket *so = inp->inp_socket; | |
233 | ||
ba55c9af BJ |
234 | so->so_pcb = 0; |
235 | sofree(so); | |
c9aca561 | 236 | if (inp->inp_options) |
8011f5df | 237 | (void)m_free(inp->inp_options); |
c124e997 | 238 | if (inp->inp_route.ro_rt) |
f6311fb6 | 239 | rtfree(inp->inp_route.ro_rt); |
7545cf09 | 240 | remque(inp); |
cdad2eb1 | 241 | (void) m_free(dtom(inp)); |
af092e86 BJ |
242 | } |
243 | ||
8075bb0e | 244 | in_setsockaddr(inp, nam) |
126472ab | 245 | register struct inpcb *inp; |
8075bb0e | 246 | struct mbuf *nam; |
126472ab | 247 | { |
2aa0644d | 248 | register struct sockaddr_in *sin; |
8075bb0e BJ |
249 | |
250 | nam->m_len = sizeof (*sin); | |
251 | sin = mtod(nam, struct sockaddr_in *); | |
126472ab SL |
252 | bzero((caddr_t)sin, sizeof (*sin)); |
253 | sin->sin_family = AF_INET; | |
254 | sin->sin_port = inp->inp_lport; | |
255 | sin->sin_addr = inp->inp_laddr; | |
256 | } | |
257 | ||
a7343092 | 258 | in_setpeeraddr(inp, nam) |
552daad2 | 259 | struct inpcb *inp; |
a7343092 SL |
260 | struct mbuf *nam; |
261 | { | |
2aa0644d | 262 | register struct sockaddr_in *sin; |
a7343092 SL |
263 | |
264 | nam->m_len = sizeof (*sin); | |
265 | sin = mtod(nam, struct sockaddr_in *); | |
266 | bzero((caddr_t)sin, sizeof (*sin)); | |
267 | sin->sin_family = AF_INET; | |
268 | sin->sin_port = inp->inp_fport; | |
269 | sin->sin_addr = inp->inp_faddr; | |
270 | } | |
271 | ||
72e4f44e | 272 | /* |
842b6bb5 | 273 | * Pass some notification to all connections of a protocol |
c9aca561 MK |
274 | * associated with address dst. Call the protocol specific |
275 | * routine (if any) to handle each connection. | |
72e4f44e | 276 | */ |
842b6bb5 | 277 | in_pcbnotify(head, dst, errno, notify) |
72e4f44e SL |
278 | struct inpcb *head; |
279 | register struct in_addr *dst; | |
842b6bb5 | 280 | int errno, (*notify)(); |
72e4f44e SL |
281 | { |
282 | register struct inpcb *inp, *oinp; | |
283 | int s = splimp(); | |
284 | ||
72e4f44e | 285 | for (inp = head->inp_next; inp != head;) { |
c9aca561 MK |
286 | if (inp->inp_faddr.s_addr != dst->s_addr || |
287 | inp->inp_socket == 0) { | |
72e4f44e SL |
288 | inp = inp->inp_next; |
289 | continue; | |
290 | } | |
842b6bb5 MK |
291 | if (errno) |
292 | inp->inp_socket->so_error = errno; | |
72e4f44e SL |
293 | oinp = inp; |
294 | inp = inp->inp_next; | |
c9aca561 MK |
295 | if (notify) |
296 | (*notify)(oinp); | |
72e4f44e SL |
297 | } |
298 | splx(s); | |
299 | } | |
300 | ||
2ba2de86 MK |
301 | /* |
302 | * Check for alternatives when higher level complains | |
303 | * about service problems. For now, invalidate cached | |
304 | * routing information. If the route was created dynamically | |
305 | * (by a redirect), time to try a default gateway again. | |
306 | */ | |
307 | in_losing(inp) | |
308 | struct inpcb *inp; | |
309 | { | |
310 | register struct rtentry *rt; | |
311 | ||
312 | if ((rt = inp->inp_route.ro_rt)) { | |
313 | if (rt->rt_flags & RTF_DYNAMIC) | |
03510dd5 | 314 | (void) rtrequest((int)SIOCDELRT, rt); |
2ba2de86 MK |
315 | rtfree(rt); |
316 | inp->inp_route.ro_rt = 0; | |
317 | /* | |
318 | * A new route can be allocated | |
319 | * the next time output is attempted. | |
320 | */ | |
321 | } | |
322 | } | |
323 | ||
842b6bb5 MK |
324 | /* |
325 | * After a routing change, flush old routing | |
326 | * and allocate a (hopefully) better one. | |
327 | */ | |
328 | in_rtchange(inp) | |
2ba2de86 | 329 | register struct inpcb *inp; |
842b6bb5 MK |
330 | { |
331 | if (inp->inp_route.ro_rt) { | |
332 | rtfree(inp->inp_route.ro_rt); | |
333 | inp->inp_route.ro_rt = 0; | |
334 | /* | |
335 | * A new route can be allocated the next time | |
336 | * output is attempted. | |
337 | */ | |
338 | } | |
842b6bb5 MK |
339 | } |
340 | ||
cdad2eb1 | 341 | struct inpcb * |
ebcadd38 | 342 | in_pcblookup(head, faddr, fport, laddr, lport, flags) |
af092e86 | 343 | struct inpcb *head; |
4ad99bae | 344 | struct in_addr faddr, laddr; |
af092e86 | 345 | u_short fport, lport; |
ebcadd38 | 346 | int flags; |
af092e86 | 347 | { |
1aa87517 BJ |
348 | register struct inpcb *inp, *match = 0; |
349 | int matchwild = 3, wildcard; | |
af092e86 | 350 | |
405c9168 | 351 | for (inp = head->inp_next; inp != head; inp = inp->inp_next) { |
1aa87517 | 352 | if (inp->inp_lport != lport) |
405c9168 | 353 | continue; |
1aa87517 | 354 | wildcard = 0; |
5cdc4d65 SL |
355 | if (inp->inp_laddr.s_addr != INADDR_ANY) { |
356 | if (laddr.s_addr == INADDR_ANY) | |
1acff8ec BJ |
357 | wildcard++; |
358 | else if (inp->inp_laddr.s_addr != laddr.s_addr) | |
1aa87517 BJ |
359 | continue; |
360 | } else { | |
5cdc4d65 | 361 | if (laddr.s_addr != INADDR_ANY) |
1aa87517 BJ |
362 | wildcard++; |
363 | } | |
5cdc4d65 SL |
364 | if (inp->inp_faddr.s_addr != INADDR_ANY) { |
365 | if (faddr.s_addr == INADDR_ANY) | |
1acff8ec BJ |
366 | wildcard++; |
367 | else if (inp->inp_faddr.s_addr != faddr.s_addr || | |
ebcadd38 | 368 | inp->inp_fport != fport) |
1aa87517 BJ |
369 | continue; |
370 | } else { | |
5cdc4d65 | 371 | if (faddr.s_addr != INADDR_ANY) |
1aa87517 BJ |
372 | wildcard++; |
373 | } | |
ebcadd38 | 374 | if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0) |
405c9168 | 375 | continue; |
1aa87517 BJ |
376 | if (wildcard < matchwild) { |
377 | match = inp; | |
378 | matchwild = wildcard; | |
379 | if (matchwild == 0) | |
380 | break; | |
405c9168 | 381 | } |
1aa87517 | 382 | } |
405c9168 | 383 | return (match); |
af092e86 | 384 | } |