Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
96e6449f | 2 | * |
dbf0c423 | 3 | * %sccs.include.redist.c% |
f1ff9444 | 4 | * |
dbf0c423 | 5 | * @(#)uipc_usrreq.c 7.20 (Berkeley) %G% |
da7c5cc6 | 6 | */ |
d6213d15 | 7 | |
94368568 | 8 | #include "param.h" |
94368568 | 9 | #include "user.h" |
94368568 JB |
10 | #include "domain.h" |
11 | #include "protosw.h" | |
12 | #include "socket.h" | |
13 | #include "socketvar.h" | |
14 | #include "unpcb.h" | |
15 | #include "un.h" | |
f1ff9444 | 16 | #include "vnode.h" |
94368568 JB |
17 | #include "file.h" |
18 | #include "stat.h" | |
3eba0f43 | 19 | #include "mbuf.h" |
d6213d15 BJ |
20 | |
21 | /* | |
22 | * Unix communications domain. | |
88a7a62a SL |
23 | * |
24 | * TODO: | |
25 | * SEQPACKET, RDM | |
8ecea7bc | 26 | * rethink name space problems |
88a7a62a | 27 | * need a proper out-of-band |
d6213d15 | 28 | */ |
a2aebb63 | 29 | struct sockaddr sun_noname = { sizeof(sun_noname), AF_UNIX }; |
0293c204 | 30 | ino_t unp_ino; /* prototype for fake inode numbers */ |
d6213d15 BJ |
31 | |
32 | /*ARGSUSED*/ | |
0293c204 | 33 | uipc_usrreq(so, req, m, nam, control) |
d6213d15 BJ |
34 | struct socket *so; |
35 | int req; | |
0293c204 | 36 | struct mbuf *m, *nam, *control; |
d6213d15 BJ |
37 | { |
38 | struct unpcb *unp = sotounpcb(so); | |
39 | register struct socket *so2; | |
d83a7d17 | 40 | register int error = 0; |
d6213d15 | 41 | |
50b20c78 MK |
42 | if (req == PRU_CONTROL) |
43 | return (EOPNOTSUPP); | |
0293c204 | 44 | if (req != PRU_SEND && control && control->m_len) { |
88a7a62a SL |
45 | error = EOPNOTSUPP; |
46 | goto release; | |
47 | } | |
48 | if (unp == 0 && req != PRU_ATTACH) { | |
49 | error = EINVAL; | |
50 | goto release; | |
51 | } | |
d6213d15 BJ |
52 | switch (req) { |
53 | ||
54 | case PRU_ATTACH: | |
55 | if (unp) { | |
4f083fd7 | 56 | error = EISCONN; |
d6213d15 BJ |
57 | break; |
58 | } | |
fca5570f | 59 | error = unp_attach(so); |
d6213d15 BJ |
60 | break; |
61 | ||
62 | case PRU_DETACH: | |
63 | unp_detach(unp); | |
64 | break; | |
65 | ||
4f083fd7 SL |
66 | case PRU_BIND: |
67 | error = unp_bind(unp, nam); | |
68 | break; | |
69 | ||
70 | case PRU_LISTEN: | |
f1ff9444 | 71 | if (unp->unp_vnode == 0) |
4f083fd7 SL |
72 | error = EINVAL; |
73 | break; | |
74 | ||
d6213d15 | 75 | case PRU_CONNECT: |
fca5570f | 76 | error = unp_connect(so, nam); |
d6213d15 BJ |
77 | break; |
78 | ||
88a7a62a | 79 | case PRU_CONNECT2: |
d97afdcc | 80 | error = unp_connect2(so, (struct socket *)nam); |
88a7a62a SL |
81 | break; |
82 | ||
d6213d15 BJ |
83 | case PRU_DISCONNECT: |
84 | unp_disconnect(unp); | |
85 | break; | |
86 | ||
4f083fd7 | 87 | case PRU_ACCEPT: |
4aa1832d MK |
88 | /* |
89 | * Pass back name of connected socket, | |
90 | * if it was bound and we are still connected | |
91 | * (our peer may have closed already!). | |
92 | */ | |
93 | if (unp->unp_conn && unp->unp_conn->unp_addr) { | |
6c0894dd MK |
94 | nam->m_len = unp->unp_conn->unp_addr->m_len; |
95 | bcopy(mtod(unp->unp_conn->unp_addr, caddr_t), | |
96 | mtod(nam, caddr_t), (unsigned)nam->m_len); | |
97 | } else { | |
98 | nam->m_len = sizeof(sun_noname); | |
99 | *(mtod(nam, struct sockaddr *)) = sun_noname; | |
100 | } | |
d6213d15 BJ |
101 | break; |
102 | ||
103 | case PRU_SHUTDOWN: | |
104 | socantsendmore(so); | |
105 | unp_usrclosed(unp); | |
106 | break; | |
d6213d15 BJ |
107 | |
108 | case PRU_RCVD: | |
109 | switch (so->so_type) { | |
110 | ||
111 | case SOCK_DGRAM: | |
112 | panic("uipc 1"); | |
5fe6f9d1 | 113 | /*NOTREACHED*/ |
d6213d15 | 114 | |
5fe6f9d1 | 115 | case SOCK_STREAM: |
d6213d15 BJ |
116 | #define rcv (&so->so_rcv) |
117 | #define snd (&so2->so_snd) | |
118 | if (unp->unp_conn == 0) | |
119 | break; | |
120 | so2 = unp->unp_conn->unp_socket; | |
121 | /* | |
6c0894dd | 122 | * Adjust backpressure on sender |
d6213d15 BJ |
123 | * and wakeup any waiting to write. |
124 | */ | |
6c0894dd MK |
125 | snd->sb_mbmax += unp->unp_mbcnt - rcv->sb_mbcnt; |
126 | unp->unp_mbcnt = rcv->sb_mbcnt; | |
127 | snd->sb_hiwat += unp->unp_cc - rcv->sb_cc; | |
128 | unp->unp_cc = rcv->sb_cc; | |
9c40f33e | 129 | sowwakeup(so2); |
d6213d15 BJ |
130 | #undef snd |
131 | #undef rcv | |
d6213d15 BJ |
132 | break; |
133 | ||
134 | default: | |
135 | panic("uipc 2"); | |
136 | } | |
137 | break; | |
138 | ||
139 | case PRU_SEND: | |
d83a7d17 MK |
140 | if (control && (error = unp_internalize(control))) |
141 | break; | |
d6213d15 BJ |
142 | switch (so->so_type) { |
143 | ||
6c0894dd MK |
144 | case SOCK_DGRAM: { |
145 | struct sockaddr *from; | |
146 | ||
fca5570f | 147 | if (nam) { |
d6213d15 BJ |
148 | if (unp->unp_conn) { |
149 | error = EISCONN; | |
150 | break; | |
151 | } | |
fca5570f | 152 | error = unp_connect(so, nam); |
d6213d15 BJ |
153 | if (error) |
154 | break; | |
155 | } else { | |
156 | if (unp->unp_conn == 0) { | |
157 | error = ENOTCONN; | |
158 | break; | |
159 | } | |
160 | } | |
161 | so2 = unp->unp_conn->unp_socket; | |
6c0894dd MK |
162 | if (unp->unp_addr) |
163 | from = mtod(unp->unp_addr, struct sockaddr *); | |
164 | else | |
165 | from = &sun_noname; | |
d83a7d17 | 166 | if (sbappendaddr(&so2->so_rcv, from, m, control)) { |
6c0894dd MK |
167 | sorwakeup(so2); |
168 | m = 0; | |
d83a7d17 | 169 | control = 0; |
6c0894dd MK |
170 | } else |
171 | error = ENOBUFS; | |
fca5570f | 172 | if (nam) |
4f083fd7 | 173 | unp_disconnect(unp); |
d6213d15 | 174 | break; |
6c0894dd | 175 | } |
d6213d15 BJ |
176 | |
177 | case SOCK_STREAM: | |
178 | #define rcv (&so2->so_rcv) | |
179 | #define snd (&so->so_snd) | |
7068721c MK |
180 | if (so->so_state & SS_CANTSENDMORE) { |
181 | error = EPIPE; | |
182 | break; | |
183 | } | |
d6213d15 BJ |
184 | if (unp->unp_conn == 0) |
185 | panic("uipc 3"); | |
186 | so2 = unp->unp_conn->unp_socket; | |
187 | /* | |
6c0894dd MK |
188 | * Send to paired receive port, and then reduce |
189 | * send buffer hiwater marks to maintain backpressure. | |
d6213d15 BJ |
190 | * Wake up readers. |
191 | */ | |
d83a7d17 MK |
192 | if (control) { |
193 | (void)sbappendcontrol(rcv, m, control); | |
194 | control = 0; | |
195 | } else | |
6c0894dd MK |
196 | sbappend(rcv, m); |
197 | snd->sb_mbmax -= | |
198 | rcv->sb_mbcnt - unp->unp_conn->unp_mbcnt; | |
199 | unp->unp_conn->unp_mbcnt = rcv->sb_mbcnt; | |
200 | snd->sb_hiwat -= rcv->sb_cc - unp->unp_conn->unp_cc; | |
201 | unp->unp_conn->unp_cc = rcv->sb_cc; | |
9c40f33e MK |
202 | sorwakeup(so2); |
203 | m = 0; | |
d6213d15 BJ |
204 | #undef snd |
205 | #undef rcv | |
206 | break; | |
207 | ||
208 | default: | |
209 | panic("uipc 4"); | |
210 | } | |
211 | break; | |
212 | ||
213 | case PRU_ABORT: | |
214 | unp_drop(unp, ECONNABORTED); | |
215 | break; | |
216 | ||
bfd4e82c MK |
217 | case PRU_SENSE: |
218 | ((struct stat *) m)->st_blksize = so->so_snd.sb_hiwat; | |
219 | if (so->so_type == SOCK_STREAM && unp->unp_conn != 0) { | |
220 | so2 = unp->unp_conn->unp_socket; | |
221 | ((struct stat *) m)->st_blksize += so2->so_rcv.sb_cc; | |
222 | } | |
0abd16a9 | 223 | ((struct stat *) m)->st_dev = NODEV; |
0293c204 KS |
224 | if (unp->unp_ino == 0) |
225 | unp->unp_ino = unp_ino++; | |
226 | ((struct stat *) m)->st_ino = unp->unp_ino; | |
bfd4e82c | 227 | return (0); |
d6213d15 BJ |
228 | |
229 | case PRU_RCVOOB: | |
913b2f19 | 230 | return (EOPNOTSUPP); |
d6213d15 BJ |
231 | |
232 | case PRU_SENDOOB: | |
9c40f33e | 233 | error = EOPNOTSUPP; |
d6213d15 BJ |
234 | break; |
235 | ||
236 | case PRU_SOCKADDR: | |
e14f40ae MK |
237 | if (unp->unp_addr) { |
238 | nam->m_len = unp->unp_addr->m_len; | |
239 | bcopy(mtod(unp->unp_addr, caddr_t), | |
240 | mtod(nam, caddr_t), (unsigned)nam->m_len); | |
241 | } else | |
242 | nam->m_len = 0; | |
d6213d15 BJ |
243 | break; |
244 | ||
a7343092 | 245 | case PRU_PEERADDR: |
bbd1716e MK |
246 | if (unp->unp_conn && unp->unp_conn->unp_addr) { |
247 | nam->m_len = unp->unp_conn->unp_addr->m_len; | |
248 | bcopy(mtod(unp->unp_conn->unp_addr, caddr_t), | |
336a1154 | 249 | mtod(nam, caddr_t), (unsigned)nam->m_len); |
e14f40ae MK |
250 | } else |
251 | nam->m_len = 0; | |
a7343092 SL |
252 | break; |
253 | ||
d6213d15 BJ |
254 | case PRU_SLOWTIMO: |
255 | break; | |
256 | ||
257 | default: | |
258 | panic("piusrreq"); | |
259 | } | |
88a7a62a | 260 | release: |
d83a7d17 MK |
261 | if (control) |
262 | m_freem(control); | |
88a7a62a SL |
263 | if (m) |
264 | m_freem(m); | |
e14b8185 | 265 | return (error); |
d6213d15 BJ |
266 | } |
267 | ||
bfd4e82c | 268 | /* |
6c0894dd MK |
269 | * Both send and receive buffers are allocated PIPSIZ bytes of buffering |
270 | * for stream sockets, although the total for sender and receiver is | |
271 | * actually only PIPSIZ. | |
bfd4e82c MK |
272 | * Datagram sockets really use the sendspace as the maximum datagram size, |
273 | * and don't really want to reserve the sendspace. Their recvspace should | |
274 | * be large enough for at least one max-size datagram plus address. | |
275 | */ | |
276 | #define PIPSIZ 4096 | |
4f5156ea MK |
277 | u_long unpst_sendspace = PIPSIZ; |
278 | u_long unpst_recvspace = PIPSIZ; | |
279 | u_long unpdg_sendspace = 2*1024; /* really max datagram size */ | |
280 | u_long unpdg_recvspace = 4*1024; | |
d6213d15 | 281 | |
6c0894dd MK |
282 | int unp_rights; /* file descriptors in flight */ |
283 | ||
4f083fd7 | 284 | unp_attach(so) |
d6213d15 | 285 | struct socket *so; |
d6213d15 | 286 | { |
4f083fd7 | 287 | register struct mbuf *m; |
d6213d15 | 288 | register struct unpcb *unp; |
d6213d15 BJ |
289 | int error; |
290 | ||
4f5156ea MK |
291 | if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { |
292 | switch (so->so_type) { | |
bfd4e82c | 293 | |
4f5156ea MK |
294 | case SOCK_STREAM: |
295 | error = soreserve(so, unpst_sendspace, unpst_recvspace); | |
296 | break; | |
bfd4e82c | 297 | |
4f5156ea MK |
298 | case SOCK_DGRAM: |
299 | error = soreserve(so, unpdg_sendspace, unpdg_recvspace); | |
300 | break; | |
301 | } | |
302 | if (error) | |
303 | return (error); | |
bfd4e82c | 304 | } |
cce93e4b | 305 | m = m_getclr(M_DONTWAIT, MT_PCB); |
5fe6f9d1 SL |
306 | if (m == NULL) |
307 | return (ENOBUFS); | |
d6213d15 BJ |
308 | unp = mtod(m, struct unpcb *); |
309 | so->so_pcb = (caddr_t)unp; | |
310 | unp->unp_socket = so; | |
d6213d15 | 311 | return (0); |
d6213d15 BJ |
312 | } |
313 | ||
d6213d15 | 314 | unp_detach(unp) |
4f083fd7 | 315 | register struct unpcb *unp; |
d6213d15 BJ |
316 | { |
317 | ||
f1ff9444 KM |
318 | if (unp->unp_vnode) { |
319 | unp->unp_vnode->v_socket = 0; | |
320 | vrele(unp->unp_vnode); | |
321 | unp->unp_vnode = 0; | |
d6213d15 BJ |
322 | } |
323 | if (unp->unp_conn) | |
324 | unp_disconnect(unp); | |
325 | while (unp->unp_refs) | |
326 | unp_drop(unp->unp_refs, ECONNRESET); | |
327 | soisdisconnected(unp->unp_socket); | |
328 | unp->unp_socket->so_pcb = 0; | |
6c0894dd | 329 | m_freem(unp->unp_addr); |
4f083fd7 | 330 | (void) m_free(dtom(unp)); |
6c0894dd MK |
331 | if (unp_rights) |
332 | unp_gc(); | |
d6213d15 BJ |
333 | } |
334 | ||
4f083fd7 | 335 | unp_bind(unp, nam) |
d6213d15 | 336 | struct unpcb *unp; |
4f083fd7 | 337 | struct mbuf *nam; |
d6213d15 | 338 | { |
4f083fd7 | 339 | struct sockaddr_un *soun = mtod(nam, struct sockaddr_un *); |
f1ff9444 | 340 | register struct vnode *vp; |
715baff1 | 341 | register struct nameidata *ndp = &u.u_nd; |
f1ff9444 | 342 | struct vattr vattr; |
4f083fd7 | 343 | int error; |
d6213d15 | 344 | |
715baff1 | 345 | ndp->ni_dirp = soun->sun_path; |
e0d8abb8 | 346 | if (unp->unp_vnode != NULL) |
88a7a62a | 347 | return (EINVAL); |
61375223 MK |
348 | if (nam->m_len == MLEN) { |
349 | if (*(mtod(nam, caddr_t) + nam->m_len - 1) != 0) | |
350 | return (EINVAL); | |
351 | } else | |
352 | *(mtod(nam, caddr_t) + nam->m_len) = 0; | |
88a7a62a | 353 | /* SHOULD BE ABLE TO ADOPT EXISTING AND wakeup() ALA FIFO's */ |
f1ff9444 | 354 | ndp->ni_nameiop = CREATE | FOLLOW | LOCKPARENT; |
715baff1 | 355 | ndp->ni_segflg = UIO_SYSSPACE; |
f1ff9444 | 356 | if (error = namei(ndp)) |
f3bb1ae7 | 357 | return (error); |
f1ff9444 KM |
358 | vp = ndp->ni_vp; |
359 | if (vp != NULL) { | |
c4ec2128 | 360 | VOP_ABORTOP(ndp); |
39d703d6 KM |
361 | if (ndp->ni_dvp == vp) |
362 | vrele(ndp->ni_dvp); | |
363 | else | |
364 | vput(ndp->ni_dvp); | |
66955caf | 365 | vrele(vp); |
f1ff9444 | 366 | return (EADDRINUSE); |
f3bb1ae7 | 367 | } |
3ee1461b | 368 | VATTR_NULL(&vattr); |
f1ff9444 KM |
369 | vattr.va_type = VSOCK; |
370 | vattr.va_mode = 0777; | |
c4ec2128 | 371 | if (error = VOP_CREATE(ndp, &vattr)) |
d6213d15 | 372 | return (error); |
f1ff9444 KM |
373 | vp = ndp->ni_vp; |
374 | vp->v_socket = unp->unp_socket; | |
375 | unp->unp_vnode = vp; | |
6c0894dd | 376 | unp->unp_addr = m_copy(nam, 0, (int)M_COPYALL); |
c4ec2128 | 377 | VOP_UNLOCK(vp); |
d6213d15 BJ |
378 | return (0); |
379 | } | |
380 | ||
4f083fd7 | 381 | unp_connect(so, nam) |
d6213d15 | 382 | struct socket *so; |
4f083fd7 | 383 | struct mbuf *nam; |
d6213d15 | 384 | { |
4f083fd7 | 385 | register struct sockaddr_un *soun = mtod(nam, struct sockaddr_un *); |
f1ff9444 | 386 | register struct vnode *vp; |
e14f40ae | 387 | register struct socket *so2, *so3; |
715baff1 | 388 | register struct nameidata *ndp = &u.u_nd; |
e14f40ae MK |
389 | struct unpcb *unp2, *unp3; |
390 | int error; | |
d6213d15 | 391 | |
715baff1 | 392 | ndp->ni_dirp = soun->sun_path; |
61375223 MK |
393 | if (nam->m_data + nam->m_len == &nam->m_dat[MLEN]) { /* XXX */ |
394 | if (*(mtod(nam, caddr_t) + nam->m_len - 1) != 0) | |
395 | return (EMSGSIZE); | |
396 | } else | |
397 | *(mtod(nam, caddr_t) + nam->m_len) = 0; | |
c4ec2128 | 398 | ndp->ni_nameiop = LOOKUP | FOLLOW | LOCKLEAF; |
715baff1 | 399 | ndp->ni_segflg = UIO_SYSSPACE; |
f1ff9444 KM |
400 | if (error = namei(ndp)) |
401 | return (error); | |
402 | vp = ndp->ni_vp; | |
f1ff9444 | 403 | if (vp->v_type != VSOCK) { |
d6213d15 BJ |
404 | error = ENOTSOCK; |
405 | goto bad; | |
406 | } | |
6a1c9219 KM |
407 | if (error = VOP_ACCESS(vp, VWRITE, ndp->ni_cred)) |
408 | goto bad; | |
f1ff9444 | 409 | so2 = vp->v_socket; |
d6213d15 BJ |
410 | if (so2 == 0) { |
411 | error = ECONNREFUSED; | |
412 | goto bad; | |
413 | } | |
5a48956d SL |
414 | if (so->so_type != so2->so_type) { |
415 | error = EPROTOTYPE; | |
416 | goto bad; | |
417 | } | |
e14f40ae MK |
418 | if (so->so_proto->pr_flags & PR_CONNREQUIRED) { |
419 | if ((so2->so_options & SO_ACCEPTCONN) == 0 || | |
0293c204 | 420 | (so3 = sonewconn(so2, 0)) == 0) { |
e14f40ae MK |
421 | error = ECONNREFUSED; |
422 | goto bad; | |
423 | } | |
424 | unp2 = sotounpcb(so2); | |
425 | unp3 = sotounpcb(so3); | |
426 | if (unp2->unp_addr) | |
a2aebb63 KS |
427 | unp3->unp_addr = |
428 | m_copy(unp2->unp_addr, 0, (int)M_COPYALL); | |
e14f40ae | 429 | so2 = so3; |
5a48956d | 430 | } |
d97afdcc | 431 | error = unp_connect2(so, so2); |
88a7a62a | 432 | bad: |
c4ec2128 | 433 | vput(vp); |
88a7a62a SL |
434 | return (error); |
435 | } | |
436 | ||
d97afdcc | 437 | unp_connect2(so, so2) |
88a7a62a | 438 | register struct socket *so; |
88a7a62a SL |
439 | register struct socket *so2; |
440 | { | |
441 | register struct unpcb *unp = sotounpcb(so); | |
442 | register struct unpcb *unp2; | |
443 | ||
444 | if (so2->so_type != so->so_type) | |
445 | return (EPROTOTYPE); | |
ccffacbd SL |
446 | unp2 = sotounpcb(so2); |
447 | unp->unp_conn = unp2; | |
d6213d15 BJ |
448 | switch (so->so_type) { |
449 | ||
450 | case SOCK_DGRAM: | |
d6213d15 BJ |
451 | unp->unp_nextref = unp2->unp_refs; |
452 | unp2->unp_refs = unp; | |
9c40f33e | 453 | soisconnected(so); |
d6213d15 BJ |
454 | break; |
455 | ||
456 | case SOCK_STREAM: | |
4f083fd7 | 457 | unp2->unp_conn = unp; |
ccffacbd | 458 | soisconnected(so); |
0293c204 | 459 | soisconnected(so2); |
d6213d15 BJ |
460 | break; |
461 | ||
462 | default: | |
88a7a62a | 463 | panic("unp_connect2"); |
d6213d15 | 464 | } |
d6213d15 | 465 | return (0); |
d6213d15 | 466 | } |
4f083fd7 SL |
467 | |
468 | unp_disconnect(unp) | |
469 | struct unpcb *unp; | |
470 | { | |
471 | register struct unpcb *unp2 = unp->unp_conn; | |
472 | ||
473 | if (unp2 == 0) | |
474 | return; | |
475 | unp->unp_conn = 0; | |
4f083fd7 SL |
476 | switch (unp->unp_socket->so_type) { |
477 | ||
478 | case SOCK_DGRAM: | |
479 | if (unp2->unp_refs == unp) | |
480 | unp2->unp_refs = unp->unp_nextref; | |
481 | else { | |
482 | unp2 = unp2->unp_refs; | |
483 | for (;;) { | |
484 | if (unp2 == 0) | |
485 | panic("unp_disconnect"); | |
486 | if (unp2->unp_nextref == unp) | |
487 | break; | |
488 | unp2 = unp2->unp_nextref; | |
489 | } | |
490 | unp2->unp_nextref = unp->unp_nextref; | |
491 | } | |
492 | unp->unp_nextref = 0; | |
c5935bca | 493 | unp->unp_socket->so_state &= ~SS_ISCONNECTED; |
4f083fd7 SL |
494 | break; |
495 | ||
496 | case SOCK_STREAM: | |
ccffacbd | 497 | soisdisconnected(unp->unp_socket); |
4f083fd7 SL |
498 | unp2->unp_conn = 0; |
499 | soisdisconnected(unp2->unp_socket); | |
4f083fd7 SL |
500 | break; |
501 | } | |
502 | } | |
503 | ||
88a7a62a | 504 | #ifdef notdef |
4f083fd7 SL |
505 | unp_abort(unp) |
506 | struct unpcb *unp; | |
507 | { | |
508 | ||
509 | unp_detach(unp); | |
510 | } | |
88a7a62a | 511 | #endif |
4f083fd7 SL |
512 | |
513 | /*ARGSUSED*/ | |
514 | unp_usrclosed(unp) | |
515 | struct unpcb *unp; | |
516 | { | |
517 | ||
518 | } | |
519 | ||
520 | unp_drop(unp, errno) | |
521 | struct unpcb *unp; | |
522 | int errno; | |
523 | { | |
d12671e0 | 524 | struct socket *so = unp->unp_socket; |
4f083fd7 | 525 | |
d12671e0 | 526 | so->so_error = errno; |
4f083fd7 | 527 | unp_disconnect(unp); |
d12671e0 MK |
528 | if (so->so_head) { |
529 | so->so_pcb = (caddr_t) 0; | |
6c0894dd | 530 | m_freem(unp->unp_addr); |
d12671e0 MK |
531 | (void) m_free(dtom(unp)); |
532 | sofree(so); | |
533 | } | |
4f083fd7 SL |
534 | } |
535 | ||
88a7a62a | 536 | #ifdef notdef |
4f083fd7 SL |
537 | unp_drain() |
538 | { | |
539 | ||
540 | } | |
88a7a62a SL |
541 | #endif |
542 | ||
543 | unp_externalize(rights) | |
544 | struct mbuf *rights; | |
545 | { | |
88a7a62a | 546 | register int i; |
0293c204 KS |
547 | register struct cmsghdr *cm = mtod(rights, struct cmsghdr *); |
548 | register struct file **rp = (struct file **)(cm + 1); | |
88a7a62a | 549 | register struct file *fp; |
0293c204 | 550 | int newfds = (cm->cmsg_len - sizeof(*cm)) / sizeof (int); |
88a7a62a SL |
551 | int f; |
552 | ||
553 | if (newfds > ufavail()) { | |
554 | for (i = 0; i < newfds; i++) { | |
555 | fp = *rp; | |
556 | unp_discard(fp); | |
557 | *rp++ = 0; | |
558 | } | |
559 | return (EMSGSIZE); | |
560 | } | |
561 | for (i = 0; i < newfds; i++) { | |
f1ff9444 | 562 | if (ufalloc(0, &f)) |
88a7a62a SL |
563 | panic("unp_externalize"); |
564 | fp = *rp; | |
565 | u.u_ofile[f] = fp; | |
566 | fp->f_msgcount--; | |
6c0894dd | 567 | unp_rights--; |
bb3b4851 | 568 | *(int *)rp++ = f; |
88a7a62a SL |
569 | } |
570 | return (0); | |
571 | } | |
572 | ||
d83a7d17 MK |
573 | unp_internalize(control) |
574 | struct mbuf *control; | |
88a7a62a | 575 | { |
d83a7d17 | 576 | register struct cmsghdr *cm = mtod(control, struct cmsghdr *); |
88a7a62a | 577 | register struct file **rp; |
88a7a62a | 578 | register struct file *fp; |
d83a7d17 MK |
579 | register int i, fd; |
580 | int oldfds; | |
88a7a62a | 581 | |
d83a7d17 MK |
582 | if (cm->cmsg_type != SCM_RIGHTS || cm->cmsg_level != SOL_SOCKET || |
583 | cm->cmsg_len != control->m_len) | |
0293c204 KS |
584 | return (EINVAL); |
585 | oldfds = (cm->cmsg_len - sizeof (*cm)) / sizeof (int); | |
0293c204 | 586 | rp = (struct file **)(cm + 1); |
c4ec2128 KM |
587 | for (i = 0; i < oldfds; i++) { |
588 | fd = *(int *)rp++; | |
589 | if ((unsigned)fd >= NOFILE || u.u_ofile[fd] == NULL) | |
88a7a62a | 590 | return (EBADF); |
c4ec2128 | 591 | } |
0293c204 | 592 | rp = (struct file **)(cm + 1); |
44eb2da3 | 593 | for (i = 0; i < oldfds; i++) { |
c4ec2128 | 594 | fp = u.u_ofile[*(int *)rp]; |
88a7a62a SL |
595 | *rp++ = fp; |
596 | fp->f_count++; | |
597 | fp->f_msgcount++; | |
6c0894dd | 598 | unp_rights++; |
88a7a62a SL |
599 | } |
600 | return (0); | |
601 | } | |
602 | ||
603 | int unp_defer, unp_gcing; | |
604 | int unp_mark(); | |
261a8548 | 605 | extern struct domain unixdomain; |
88a7a62a SL |
606 | |
607 | unp_gc() | |
608 | { | |
609 | register struct file *fp; | |
610 | register struct socket *so; | |
611 | ||
612 | if (unp_gcing) | |
613 | return; | |
614 | unp_gcing = 1; | |
615 | restart: | |
616 | unp_defer = 0; | |
617 | for (fp = file; fp < fileNFILE; fp++) | |
618 | fp->f_flag &= ~(FMARK|FDEFER); | |
619 | do { | |
620 | for (fp = file; fp < fileNFILE; fp++) { | |
621 | if (fp->f_count == 0) | |
622 | continue; | |
623 | if (fp->f_flag & FDEFER) { | |
624 | fp->f_flag &= ~FDEFER; | |
625 | unp_defer--; | |
626 | } else { | |
627 | if (fp->f_flag & FMARK) | |
628 | continue; | |
629 | if (fp->f_count == fp->f_msgcount) | |
630 | continue; | |
631 | fp->f_flag |= FMARK; | |
632 | } | |
aa5945aa MK |
633 | if (fp->f_type != DTYPE_SOCKET || |
634 | (so = (struct socket *)fp->f_data) == 0) | |
88a7a62a | 635 | continue; |
261a8548 | 636 | if (so->so_proto->pr_domain != &unixdomain || |
c5935bca | 637 | (so->so_proto->pr_flags&PR_RIGHTS) == 0) |
88a7a62a SL |
638 | continue; |
639 | if (so->so_rcv.sb_flags & SB_LOCK) { | |
640 | sbwait(&so->so_rcv); | |
641 | goto restart; | |
642 | } | |
643 | unp_scan(so->so_rcv.sb_mb, unp_mark); | |
644 | } | |
645 | } while (unp_defer); | |
646 | for (fp = file; fp < fileNFILE; fp++) { | |
647 | if (fp->f_count == 0) | |
648 | continue; | |
6c0894dd MK |
649 | if (fp->f_count == fp->f_msgcount && (fp->f_flag & FMARK) == 0) |
650 | while (fp->f_msgcount) | |
651 | unp_discard(fp); | |
88a7a62a SL |
652 | } |
653 | unp_gcing = 0; | |
654 | } | |
655 | ||
261a8548 MK |
656 | unp_dispose(m) |
657 | struct mbuf *m; | |
658 | { | |
659 | int unp_discard(); | |
660 | ||
148703ec MK |
661 | if (m) |
662 | unp_scan(m, unp_discard); | |
261a8548 MK |
663 | } |
664 | ||
665 | unp_scan(m0, op) | |
666 | register struct mbuf *m0; | |
88a7a62a SL |
667 | int (*op)(); |
668 | { | |
261a8548 | 669 | register struct mbuf *m; |
88a7a62a | 670 | register struct file **rp; |
d83a7d17 | 671 | register struct cmsghdr *cm; |
88a7a62a | 672 | register int i; |
148703ec | 673 | int qfds; |
261a8548 MK |
674 | |
675 | while (m0) { | |
676 | for (m = m0; m; m = m->m_next) | |
d83a7d17 MK |
677 | if (m->m_type == MT_CONTROL && |
678 | m->m_len >= sizeof(*cm)) { | |
0293c204 | 679 | cm = mtod(m, struct cmsghdr *); |
d83a7d17 MK |
680 | if (cm->cmsg_level != SOL_SOCKET || |
681 | cm->cmsg_type != SCM_RIGHTS) | |
682 | continue; | |
0293c204 KS |
683 | qfds = (cm->cmsg_len - sizeof *cm) |
684 | / sizeof (struct file *); | |
685 | rp = (struct file **)(cm + 1); | |
261a8548 MK |
686 | for (i = 0; i < qfds; i++) |
687 | (*op)(*rp++); | |
688 | break; /* XXX, but saves time */ | |
689 | } | |
148703ec | 690 | m0 = m0->m_act; |
88a7a62a | 691 | } |
88a7a62a SL |
692 | } |
693 | ||
694 | unp_mark(fp) | |
695 | struct file *fp; | |
696 | { | |
697 | ||
698 | if (fp->f_flag & FMARK) | |
699 | return; | |
700 | unp_defer++; | |
701 | fp->f_flag |= (FMARK|FDEFER); | |
702 | } | |
703 | ||
704 | unp_discard(fp) | |
705 | struct file *fp; | |
706 | { | |
707 | ||
708 | fp->f_msgcount--; | |
6c0894dd | 709 | unp_rights--; |
69be5b7a | 710 | (void) closef(fp); |
88a7a62a | 711 | } |