Commit | Line | Data |
---|---|---|
f2d10020 | 1 | /* in_pcb.c 6.5 84/11/27 */ |
af092e86 | 2 | |
20666ad3 JB |
3 | #include "param.h" |
4 | #include "systm.h" | |
5 | #include "dir.h" | |
6 | #include "user.h" | |
7 | #include "mbuf.h" | |
8 | #include "socket.h" | |
9 | #include "socketvar.h" | |
10 | #include "in.h" | |
11 | #include "in_systm.h" | |
4ad99bae | 12 | #include "../net/if.h" |
c124e997 | 13 | #include "../net/route.h" |
20666ad3 JB |
14 | #include "in_pcb.h" |
15 | #include "protosw.h" | |
af092e86 | 16 | |
1a3dbf93 | 17 | struct in_addr zeroin_addr; |
405c9168 | 18 | |
8f0d18de BJ |
19 | in_pcballoc(so, head) |
20 | struct socket *so; | |
21 | struct inpcb *head; | |
22 | { | |
23 | struct mbuf *m; | |
24 | register struct inpcb *inp; | |
25 | ||
cce93e4b | 26 | m = m_getclr(M_DONTWAIT, MT_PCB); |
5cdc4d65 | 27 | if (m == NULL) |
8f0d18de BJ |
28 | return (ENOBUFS); |
29 | inp = mtod(m, struct inpcb *); | |
30 | inp->inp_head = head; | |
31 | inp->inp_socket = so; | |
32 | insque(inp, head); | |
33 | so->so_pcb = (caddr_t)inp; | |
34 | return (0); | |
35 | } | |
36 | ||
8075bb0e | 37 | in_pcbbind(inp, nam) |
8f0d18de | 38 | register struct inpcb *inp; |
8075bb0e | 39 | struct mbuf *nam; |
8f0d18de BJ |
40 | { |
41 | register struct socket *so = inp->inp_socket; | |
42 | register struct inpcb *head = inp->inp_head; | |
8075bb0e | 43 | register struct sockaddr_in *sin; |
8f0d18de BJ |
44 | u_short lport = 0; |
45 | ||
46 | if (ifnet == 0) | |
47 | return (EADDRNOTAVAIL); | |
5cdc4d65 | 48 | if (inp->inp_lport || inp->inp_laddr.s_addr != INADDR_ANY) |
8075bb0e BJ |
49 | return (EINVAL); |
50 | if (nam == 0) | |
51 | goto noname; | |
52 | sin = mtod(nam, struct sockaddr_in *); | |
53 | if (nam->m_len != sizeof (*sin)) | |
54 | return (EINVAL); | |
5cdc4d65 | 55 | if (sin->sin_addr.s_addr != INADDR_ANY) { |
8075bb0e | 56 | int tport = sin->sin_port; |
8f0d18de | 57 | |
8075bb0e BJ |
58 | sin->sin_port = 0; /* yech... */ |
59 | if (if_ifwithaddr((struct sockaddr *)sin) == 0) | |
60 | return (EADDRNOTAVAIL); | |
61 | sin->sin_port = tport; | |
8f0d18de | 62 | } |
8075bb0e BJ |
63 | lport = sin->sin_port; |
64 | if (lport) { | |
f2d10020 | 65 | u_short aport = ntohs(lport); |
8075bb0e | 66 | int wild = 0; |
c124e997 | 67 | |
8075bb0e BJ |
68 | /* GROSS */ |
69 | if (aport < IPPORT_RESERVED && u.u_uid != 0) | |
70 | return (EACCES); | |
b4a3d4a7 SL |
71 | /* even GROSSER, but this is the Internet */ |
72 | if ((so->so_options & SO_REUSEADDR) == 0 && | |
73 | ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0 || | |
74 | (so->so_options & SO_ACCEPTCONN) == 0)) | |
8075bb0e BJ |
75 | wild = INPLOOKUP_WILDCARD; |
76 | if (in_pcblookup(head, | |
77 | zeroin_addr, 0, sin->sin_addr, lport, wild)) | |
78 | return (EADDRINUSE); | |
4ad99bae | 79 | } |
8075bb0e BJ |
80 | inp->inp_laddr = sin->sin_addr; |
81 | noname: | |
b454c3ea BJ |
82 | if (lport == 0) |
83 | do { | |
1aa87517 BJ |
84 | if (head->inp_lport++ < IPPORT_RESERVED) |
85 | head->inp_lport = IPPORT_RESERVED; | |
b454c3ea | 86 | lport = htons(head->inp_lport); |
1aa87517 BJ |
87 | } while (in_pcblookup(head, |
88 | zeroin_addr, 0, inp->inp_laddr, lport, 0)); | |
4ad99bae | 89 | inp->inp_lport = lport; |
4ad99bae | 90 | return (0); |
af092e86 BJ |
91 | } |
92 | ||
1acff8ec BJ |
93 | /* |
94 | * Connect from a socket to a specified address. | |
95 | * Both address and port must be specified in argument sin. | |
96 | * If don't have a local address for this socket yet, | |
97 | * then pick one. | |
98 | */ | |
8075bb0e | 99 | in_pcbconnect(inp, nam) |
4ad99bae | 100 | struct inpcb *inp; |
8075bb0e | 101 | struct mbuf *nam; |
2b4b57cd | 102 | { |
1aa87517 | 103 | struct ifnet *ifp; |
ee787340 | 104 | struct sockaddr_in *ifaddr; |
8075bb0e | 105 | register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); |
2b4b57cd | 106 | |
8075bb0e BJ |
107 | if (nam->m_len != sizeof (*sin)) |
108 | return (EINVAL); | |
4ad99bae BJ |
109 | if (sin->sin_family != AF_INET) |
110 | return (EAFNOSUPPORT); | |
5cdc4d65 | 111 | if (sin->sin_addr.s_addr == INADDR_ANY || sin->sin_port == 0) |
4ad99bae | 112 | return (EADDRNOTAVAIL); |
5cdc4d65 | 113 | if (inp->inp_laddr.s_addr == INADDR_ANY) { |
6187f8f4 | 114 | ifp = if_ifonnetof(in_netof(sin->sin_addr)); |
ee787340 | 115 | if (ifp == 0) { |
99578149 MK |
116 | register struct route *ro; |
117 | ||
118 | /* | |
119 | * If route is known or can be allocated now, | |
120 | * our src addr is taken from the i/f, else punt. | |
72e4f44e | 121 | */ |
99578149 MK |
122 | ro = &inp->inp_route; |
123 | #define satosin(sa) ((struct sockaddr_in *)(sa)) | |
124 | if (ro->ro_rt && | |
125 | satosin(&ro->ro_dst)->sin_addr.s_addr != | |
126 | sin->sin_addr.s_addr) { | |
127 | RTFREE(ro->ro_rt); | |
128 | ro->ro_rt = (struct rtentry *)0; | |
129 | } | |
130 | if ((ro->ro_rt == (struct rtentry *)0) || | |
131 | (ifp = ro->ro_rt->rt_ifp) == (struct ifnet *)0) { | |
132 | /* No route yet, so try to acquire one */ | |
133 | ro->ro_dst.sa_family = AF_INET; | |
134 | ((struct sockaddr_in *) &ro->ro_dst)->sin_addr = | |
135 | sin->sin_addr; | |
136 | rtalloc(ro); | |
137 | if (ro->ro_rt == 0) | |
138 | ifp = (struct ifnet *) 0; | |
139 | else | |
140 | ifp = ro->ro_rt->rt_ifp; | |
141 | } | |
142 | if (ifp == 0) | |
143 | ifp = if_ifwithaf(AF_INET); | |
ee787340 | 144 | if (ifp == 0) |
72e4f44e | 145 | return (EADDRNOTAVAIL); |
ee787340 SL |
146 | } |
147 | ifaddr = (struct sockaddr_in *)&ifp->if_addr; | |
1aa87517 BJ |
148 | } |
149 | if (in_pcblookup(inp->inp_head, | |
1acff8ec BJ |
150 | sin->sin_addr, |
151 | sin->sin_port, | |
ee787340 | 152 | inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr, |
1acff8ec BJ |
153 | inp->inp_lport, |
154 | 0)) | |
b454c3ea | 155 | return (EADDRINUSE); |
3cd2053b SL |
156 | if (inp->inp_laddr.s_addr == INADDR_ANY) { |
157 | if (inp->inp_lport == 0) | |
158 | in_pcbbind(inp, (struct mbuf *)0); | |
ee787340 | 159 | inp->inp_laddr = ifaddr->sin_addr; |
3cd2053b | 160 | } |
4ad99bae BJ |
161 | inp->inp_faddr = sin->sin_addr; |
162 | inp->inp_fport = sin->sin_port; | |
2b4b57cd BJ |
163 | return (0); |
164 | } | |
165 | ||
405c9168 BJ |
166 | in_pcbdisconnect(inp) |
167 | struct inpcb *inp; | |
168 | { | |
169 | ||
5cdc4d65 | 170 | inp->inp_faddr.s_addr = INADDR_ANY; |
ebcadd38 | 171 | inp->inp_fport = 0; |
8f0d18de | 172 | if (inp->inp_socket->so_state & SS_NOFDREF) |
405c9168 BJ |
173 | in_pcbdetach(inp); |
174 | } | |
175 | ||
176 | in_pcbdetach(inp) | |
af092e86 BJ |
177 | struct inpcb *inp; |
178 | { | |
179 | struct socket *so = inp->inp_socket; | |
180 | ||
ba55c9af BJ |
181 | so->so_pcb = 0; |
182 | sofree(so); | |
c124e997 | 183 | if (inp->inp_route.ro_rt) |
f6311fb6 | 184 | rtfree(inp->inp_route.ro_rt); |
7545cf09 | 185 | remque(inp); |
cdad2eb1 | 186 | (void) m_free(dtom(inp)); |
af092e86 BJ |
187 | } |
188 | ||
8075bb0e | 189 | in_setsockaddr(inp, nam) |
126472ab | 190 | register struct inpcb *inp; |
8075bb0e | 191 | struct mbuf *nam; |
126472ab | 192 | { |
8075bb0e BJ |
193 | register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); |
194 | ||
195 | nam->m_len = sizeof (*sin); | |
196 | sin = mtod(nam, struct sockaddr_in *); | |
126472ab SL |
197 | bzero((caddr_t)sin, sizeof (*sin)); |
198 | sin->sin_family = AF_INET; | |
199 | sin->sin_port = inp->inp_lport; | |
200 | sin->sin_addr = inp->inp_laddr; | |
201 | } | |
202 | ||
a7343092 SL |
203 | in_setpeeraddr(inp, nam) |
204 | register struct inpcb *inp; | |
205 | struct mbuf *nam; | |
206 | { | |
207 | register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); | |
208 | ||
209 | nam->m_len = sizeof (*sin); | |
210 | sin = mtod(nam, struct sockaddr_in *); | |
211 | bzero((caddr_t)sin, sizeof (*sin)); | |
212 | sin->sin_family = AF_INET; | |
213 | sin->sin_port = inp->inp_fport; | |
214 | sin->sin_addr = inp->inp_faddr; | |
215 | } | |
216 | ||
72e4f44e | 217 | /* |
842b6bb5 MK |
218 | * Pass some notification to all connections of a protocol |
219 | * associated with address dst. Call the | |
220 | * protocol specific routine to handle each connection. | |
72e4f44e | 221 | */ |
842b6bb5 | 222 | in_pcbnotify(head, dst, errno, notify) |
72e4f44e SL |
223 | struct inpcb *head; |
224 | register struct in_addr *dst; | |
842b6bb5 | 225 | int errno, (*notify)(); |
72e4f44e SL |
226 | { |
227 | register struct inpcb *inp, *oinp; | |
228 | int s = splimp(); | |
229 | ||
72e4f44e SL |
230 | for (inp = head->inp_next; inp != head;) { |
231 | if (inp->inp_faddr.s_addr != dst->s_addr) { | |
232 | next: | |
233 | inp = inp->inp_next; | |
234 | continue; | |
235 | } | |
236 | if (inp->inp_socket == 0) | |
237 | goto next; | |
842b6bb5 MK |
238 | if (errno) |
239 | inp->inp_socket->so_error = errno; | |
72e4f44e SL |
240 | oinp = inp; |
241 | inp = inp->inp_next; | |
842b6bb5 | 242 | (*notify)(oinp); |
72e4f44e SL |
243 | } |
244 | splx(s); | |
245 | } | |
246 | ||
842b6bb5 MK |
247 | /* |
248 | * After a routing change, flush old routing | |
249 | * and allocate a (hopefully) better one. | |
250 | */ | |
251 | in_rtchange(inp) | |
252 | struct inpcb *inp; | |
253 | { | |
254 | if (inp->inp_route.ro_rt) { | |
255 | rtfree(inp->inp_route.ro_rt); | |
256 | inp->inp_route.ro_rt = 0; | |
257 | /* | |
258 | * A new route can be allocated the next time | |
259 | * output is attempted. | |
260 | */ | |
261 | } | |
262 | /* SHOULD NOTIFY HIGHER-LEVEL PROTOCOLS */ | |
263 | } | |
264 | ||
cdad2eb1 | 265 | struct inpcb * |
ebcadd38 | 266 | in_pcblookup(head, faddr, fport, laddr, lport, flags) |
af092e86 | 267 | struct inpcb *head; |
4ad99bae | 268 | struct in_addr faddr, laddr; |
af092e86 | 269 | u_short fport, lport; |
ebcadd38 | 270 | int flags; |
af092e86 | 271 | { |
1aa87517 BJ |
272 | register struct inpcb *inp, *match = 0; |
273 | int matchwild = 3, wildcard; | |
af092e86 | 274 | |
405c9168 | 275 | for (inp = head->inp_next; inp != head; inp = inp->inp_next) { |
1aa87517 | 276 | if (inp->inp_lport != lport) |
405c9168 | 277 | continue; |
1aa87517 | 278 | wildcard = 0; |
5cdc4d65 SL |
279 | if (inp->inp_laddr.s_addr != INADDR_ANY) { |
280 | if (laddr.s_addr == INADDR_ANY) | |
1acff8ec BJ |
281 | wildcard++; |
282 | else if (inp->inp_laddr.s_addr != laddr.s_addr) | |
1aa87517 BJ |
283 | continue; |
284 | } else { | |
5cdc4d65 | 285 | if (laddr.s_addr != INADDR_ANY) |
1aa87517 BJ |
286 | wildcard++; |
287 | } | |
5cdc4d65 SL |
288 | if (inp->inp_faddr.s_addr != INADDR_ANY) { |
289 | if (faddr.s_addr == INADDR_ANY) | |
1acff8ec BJ |
290 | wildcard++; |
291 | else if (inp->inp_faddr.s_addr != faddr.s_addr || | |
ebcadd38 | 292 | inp->inp_fport != fport) |
1aa87517 BJ |
293 | continue; |
294 | } else { | |
5cdc4d65 | 295 | if (faddr.s_addr != INADDR_ANY) |
1aa87517 BJ |
296 | wildcard++; |
297 | } | |
ebcadd38 | 298 | if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0) |
405c9168 | 299 | continue; |
1aa87517 BJ |
300 | if (wildcard < matchwild) { |
301 | match = inp; | |
302 | matchwild = wildcard; | |
303 | if (matchwild == 0) | |
304 | break; | |
405c9168 | 305 | } |
1aa87517 | 306 | } |
405c9168 | 307 | return (match); |
af092e86 | 308 | } |