Commit | Line | Data |
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fcfe450e | 1 | /* in_pcb.c 4.32 82/10/09 */ |
af092e86 BJ |
2 | |
3 | #include "../h/param.h" | |
4ad99bae BJ |
4 | #include "../h/systm.h" |
5 | #include "../h/dir.h" | |
6 | #include "../h/user.h" | |
af092e86 BJ |
7 | #include "../h/mbuf.h" |
8 | #include "../h/socket.h" | |
9 | #include "../h/socketvar.h" | |
fcfe450e BJ |
10 | #include "../netinet/in.h" |
11 | #include "../netinet/in_systm.h" | |
4ad99bae | 12 | #include "../net/if.h" |
c124e997 | 13 | #include "../net/route.h" |
fcfe450e | 14 | #include "../netinet/in_pcb.h" |
1acff8ec | 15 | #include "../h/protosw.h" |
af092e86 | 16 | |
1a3dbf93 | 17 | struct in_addr zeroin_addr; |
405c9168 | 18 | |
8f0d18de BJ |
19 | in_pcbreserve(so, sndcc, rcvcc) |
20 | struct socket *so; | |
21 | int sndcc, rcvcc; | |
22 | { | |
23 | ||
24 | if (sbreserve(&so->so_snd, sndcc) == 0) | |
25 | goto bad; | |
26 | if (sbreserve(&so->so_rcv, rcvcc) == 0) | |
27 | goto bad2; | |
28 | return (0); | |
29 | bad2: | |
30 | sbrelease(&so->so_snd); | |
31 | bad: | |
32 | return (ENOBUFS); | |
33 | } | |
34 | ||
35 | in_pcballoc(so, head) | |
36 | struct socket *so; | |
37 | struct inpcb *head; | |
38 | { | |
39 | struct mbuf *m; | |
40 | register struct inpcb *inp; | |
41 | ||
42 | m = m_getclr(M_DONTWAIT); | |
43 | if (m == 0) | |
44 | return (ENOBUFS); | |
45 | inp = mtod(m, struct inpcb *); | |
46 | inp->inp_head = head; | |
47 | inp->inp_socket = so; | |
48 | insque(inp, head); | |
49 | so->so_pcb = (caddr_t)inp; | |
50 | return (0); | |
51 | } | |
52 | ||
8075bb0e | 53 | in_pcbbind(inp, nam) |
8f0d18de | 54 | register struct inpcb *inp; |
8075bb0e | 55 | struct mbuf *nam; |
8f0d18de BJ |
56 | { |
57 | register struct socket *so = inp->inp_socket; | |
58 | register struct inpcb *head = inp->inp_head; | |
8075bb0e | 59 | register struct sockaddr_in *sin; |
8f0d18de BJ |
60 | u_short lport = 0; |
61 | ||
62 | if (ifnet == 0) | |
63 | return (EADDRNOTAVAIL); | |
8075bb0e BJ |
64 | if (inp->inp_lport || inp->inp_laddr.s_addr) |
65 | return (EINVAL); | |
66 | if (nam == 0) | |
67 | goto noname; | |
68 | sin = mtod(nam, struct sockaddr_in *); | |
69 | if (nam->m_len != sizeof (*sin)) | |
70 | return (EINVAL); | |
71 | if (sin->sin_addr.s_addr) { | |
72 | int tport = sin->sin_port; | |
8f0d18de | 73 | |
8075bb0e BJ |
74 | sin->sin_port = 0; /* yech... */ |
75 | if (if_ifwithaddr((struct sockaddr *)sin) == 0) | |
76 | return (EADDRNOTAVAIL); | |
77 | sin->sin_port = tport; | |
8f0d18de | 78 | } |
8075bb0e BJ |
79 | lport = sin->sin_port; |
80 | if (lport) { | |
81 | u_short aport = lport; | |
82 | int wild = 0; | |
c124e997 | 83 | |
1aa87517 | 84 | #if vax |
8075bb0e | 85 | aport = htons(aport); |
1aa87517 | 86 | #endif |
8075bb0e BJ |
87 | /* GROSS */ |
88 | if (aport < IPPORT_RESERVED && u.u_uid != 0) | |
89 | return (EACCES); | |
90 | if ((so->so_proto->pr_flags & PR_CONNREQUIRED) == 0) | |
91 | wild = INPLOOKUP_WILDCARD; | |
92 | if (in_pcblookup(head, | |
93 | zeroin_addr, 0, sin->sin_addr, lport, wild)) | |
94 | return (EADDRINUSE); | |
4ad99bae | 95 | } |
8075bb0e BJ |
96 | inp->inp_laddr = sin->sin_addr; |
97 | noname: | |
b454c3ea BJ |
98 | if (lport == 0) |
99 | do { | |
1aa87517 BJ |
100 | if (head->inp_lport++ < IPPORT_RESERVED) |
101 | head->inp_lport = IPPORT_RESERVED; | |
b454c3ea | 102 | lport = htons(head->inp_lport); |
1aa87517 BJ |
103 | } while (in_pcblookup(head, |
104 | zeroin_addr, 0, inp->inp_laddr, lport, 0)); | |
4ad99bae | 105 | inp->inp_lport = lport; |
4ad99bae | 106 | return (0); |
af092e86 BJ |
107 | } |
108 | ||
1acff8ec BJ |
109 | /* |
110 | * Connect from a socket to a specified address. | |
111 | * Both address and port must be specified in argument sin. | |
112 | * If don't have a local address for this socket yet, | |
113 | * then pick one. | |
114 | */ | |
8075bb0e | 115 | in_pcbconnect(inp, nam) |
4ad99bae | 116 | struct inpcb *inp; |
8075bb0e | 117 | struct mbuf *nam; |
2b4b57cd | 118 | { |
1aa87517 | 119 | struct ifnet *ifp; |
ee787340 | 120 | struct sockaddr_in *ifaddr; |
8075bb0e | 121 | register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); |
2b4b57cd | 122 | |
8075bb0e BJ |
123 | if (nam->m_len != sizeof (*sin)) |
124 | return (EINVAL); | |
4ad99bae BJ |
125 | if (sin->sin_family != AF_INET) |
126 | return (EAFNOSUPPORT); | |
127 | if (sin->sin_addr.s_addr == 0 || sin->sin_port == 0) | |
128 | return (EADDRNOTAVAIL); | |
1aa87517 | 129 | if (inp->inp_laddr.s_addr == 0) { |
6187f8f4 | 130 | ifp = if_ifonnetof(in_netof(sin->sin_addr)); |
ee787340 | 131 | if (ifp == 0) { |
72e4f44e SL |
132 | /* |
133 | * We should select the interface based on | |
134 | * the route to be used, but for udp this would | |
135 | * result in two calls to rtalloc for each packet | |
136 | * sent; hardly worthwhile... | |
137 | */ | |
ee787340 SL |
138 | ifp = if_ifwithaf(AF_INET); |
139 | if (ifp == 0) | |
72e4f44e | 140 | return (EADDRNOTAVAIL); |
ee787340 SL |
141 | } |
142 | ifaddr = (struct sockaddr_in *)&ifp->if_addr; | |
1aa87517 BJ |
143 | } |
144 | if (in_pcblookup(inp->inp_head, | |
1acff8ec BJ |
145 | sin->sin_addr, |
146 | sin->sin_port, | |
ee787340 | 147 | inp->inp_laddr.s_addr ? inp->inp_laddr : ifaddr->sin_addr, |
1acff8ec BJ |
148 | inp->inp_lport, |
149 | 0)) | |
b454c3ea | 150 | return (EADDRINUSE); |
126472ab | 151 | if (inp->inp_laddr.s_addr == 0) |
ee787340 | 152 | inp->inp_laddr = ifaddr->sin_addr; |
4ad99bae BJ |
153 | inp->inp_faddr = sin->sin_addr; |
154 | inp->inp_fport = sin->sin_port; | |
2b4b57cd BJ |
155 | return (0); |
156 | } | |
157 | ||
405c9168 BJ |
158 | in_pcbdisconnect(inp) |
159 | struct inpcb *inp; | |
160 | { | |
161 | ||
405c9168 | 162 | inp->inp_faddr.s_addr = 0; |
ebcadd38 | 163 | inp->inp_fport = 0; |
8f0d18de | 164 | if (inp->inp_socket->so_state & SS_NOFDREF) |
405c9168 BJ |
165 | in_pcbdetach(inp); |
166 | } | |
167 | ||
168 | in_pcbdetach(inp) | |
af092e86 BJ |
169 | struct inpcb *inp; |
170 | { | |
171 | struct socket *so = inp->inp_socket; | |
172 | ||
ba55c9af BJ |
173 | so->so_pcb = 0; |
174 | sofree(so); | |
c124e997 | 175 | if (inp->inp_route.ro_rt) |
f6311fb6 | 176 | rtfree(inp->inp_route.ro_rt); |
7545cf09 | 177 | remque(inp); |
cdad2eb1 | 178 | (void) m_free(dtom(inp)); |
af092e86 BJ |
179 | } |
180 | ||
8075bb0e | 181 | in_setsockaddr(inp, nam) |
126472ab | 182 | register struct inpcb *inp; |
8075bb0e | 183 | struct mbuf *nam; |
126472ab | 184 | { |
8075bb0e BJ |
185 | register struct sockaddr_in *sin = mtod(nam, struct sockaddr_in *); |
186 | ||
187 | nam->m_len = sizeof (*sin); | |
188 | sin = mtod(nam, struct sockaddr_in *); | |
126472ab SL |
189 | bzero((caddr_t)sin, sizeof (*sin)); |
190 | sin->sin_family = AF_INET; | |
191 | sin->sin_port = inp->inp_lport; | |
192 | sin->sin_addr = inp->inp_laddr; | |
193 | } | |
194 | ||
72e4f44e SL |
195 | /* |
196 | * Pass an error to all internet connections | |
197 | * associated with address sin. Call the | |
198 | * protocol specific routine to clean up the | |
199 | * mess afterwards. | |
200 | */ | |
201 | in_pcbnotify(head, dst, errno, abort) | |
202 | struct inpcb *head; | |
203 | register struct in_addr *dst; | |
204 | int errno, (*abort)(); | |
205 | { | |
206 | register struct inpcb *inp, *oinp; | |
207 | int s = splimp(); | |
208 | ||
72e4f44e SL |
209 | for (inp = head->inp_next; inp != head;) { |
210 | if (inp->inp_faddr.s_addr != dst->s_addr) { | |
211 | next: | |
212 | inp = inp->inp_next; | |
213 | continue; | |
214 | } | |
215 | if (inp->inp_socket == 0) | |
216 | goto next; | |
217 | inp->inp_socket->so_error = errno; | |
218 | oinp = inp; | |
219 | inp = inp->inp_next; | |
220 | (*abort)(oinp); | |
221 | } | |
222 | splx(s); | |
223 | } | |
224 | ||
cdad2eb1 | 225 | struct inpcb * |
ebcadd38 | 226 | in_pcblookup(head, faddr, fport, laddr, lport, flags) |
af092e86 | 227 | struct inpcb *head; |
4ad99bae | 228 | struct in_addr faddr, laddr; |
af092e86 | 229 | u_short fport, lport; |
ebcadd38 | 230 | int flags; |
af092e86 | 231 | { |
1aa87517 BJ |
232 | register struct inpcb *inp, *match = 0; |
233 | int matchwild = 3, wildcard; | |
af092e86 | 234 | |
405c9168 | 235 | for (inp = head->inp_next; inp != head; inp = inp->inp_next) { |
1aa87517 | 236 | if (inp->inp_lport != lport) |
405c9168 | 237 | continue; |
1aa87517 BJ |
238 | wildcard = 0; |
239 | if (inp->inp_laddr.s_addr != 0) { | |
1acff8ec BJ |
240 | if (laddr.s_addr == 0) |
241 | wildcard++; | |
242 | else if (inp->inp_laddr.s_addr != laddr.s_addr) | |
1aa87517 BJ |
243 | continue; |
244 | } else { | |
245 | if (laddr.s_addr != 0) | |
246 | wildcard++; | |
247 | } | |
248 | if (inp->inp_faddr.s_addr != 0) { | |
1acff8ec BJ |
249 | if (faddr.s_addr == 0) |
250 | wildcard++; | |
251 | else if (inp->inp_faddr.s_addr != faddr.s_addr || | |
ebcadd38 | 252 | inp->inp_fport != fport) |
1aa87517 BJ |
253 | continue; |
254 | } else { | |
255 | if (faddr.s_addr != 0) | |
256 | wildcard++; | |
257 | } | |
ebcadd38 | 258 | if (wildcard && (flags & INPLOOKUP_WILDCARD) == 0) |
405c9168 | 259 | continue; |
1aa87517 BJ |
260 | if (wildcard < matchwild) { |
261 | match = inp; | |
262 | matchwild = wildcard; | |
263 | if (matchwild == 0) | |
264 | break; | |
405c9168 | 265 | } |
1aa87517 | 266 | } |
405c9168 | 267 | return (match); |
af092e86 | 268 | } |