Commit | Line | Data |
---|---|---|
da7c5cc6 | 1 | /* |
96e6449f | 2 | * |
dbf0c423 | 3 | * %sccs.include.redist.c% |
f1ff9444 | 4 | * |
5b09b219 | 5 | * @(#)uipc_usrreq.c 7.21 (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); | |
5b09b219 | 105 | unp_shutdown(unp); |
d6213d15 | 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 | 192 | if (control) { |
5b09b219 MK |
193 | if (sbappendcontrol(rcv, m, control)) |
194 | control = 0; | |
d83a7d17 | 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 | 512 | |
5b09b219 | 513 | unp_shutdown(unp) |
4f083fd7 SL |
514 | struct unpcb *unp; |
515 | { | |
5b09b219 | 516 | struct socket *so; |
4f083fd7 | 517 | |
5b09b219 MK |
518 | if (unp->unp_socket->so_type == SOCK_STREAM && unp->unp_conn && |
519 | (so = unp->unp_conn->unp_socket)) | |
520 | socantrcvmore(so); | |
4f083fd7 SL |
521 | } |
522 | ||
523 | unp_drop(unp, errno) | |
524 | struct unpcb *unp; | |
525 | int errno; | |
526 | { | |
d12671e0 | 527 | struct socket *so = unp->unp_socket; |
4f083fd7 | 528 | |
d12671e0 | 529 | so->so_error = errno; |
4f083fd7 | 530 | unp_disconnect(unp); |
d12671e0 MK |
531 | if (so->so_head) { |
532 | so->so_pcb = (caddr_t) 0; | |
6c0894dd | 533 | m_freem(unp->unp_addr); |
d12671e0 MK |
534 | (void) m_free(dtom(unp)); |
535 | sofree(so); | |
536 | } | |
4f083fd7 SL |
537 | } |
538 | ||
88a7a62a | 539 | #ifdef notdef |
4f083fd7 SL |
540 | unp_drain() |
541 | { | |
542 | ||
543 | } | |
88a7a62a SL |
544 | #endif |
545 | ||
546 | unp_externalize(rights) | |
547 | struct mbuf *rights; | |
548 | { | |
88a7a62a | 549 | register int i; |
0293c204 KS |
550 | register struct cmsghdr *cm = mtod(rights, struct cmsghdr *); |
551 | register struct file **rp = (struct file **)(cm + 1); | |
88a7a62a | 552 | register struct file *fp; |
0293c204 | 553 | int newfds = (cm->cmsg_len - sizeof(*cm)) / sizeof (int); |
88a7a62a SL |
554 | int f; |
555 | ||
556 | if (newfds > ufavail()) { | |
557 | for (i = 0; i < newfds; i++) { | |
558 | fp = *rp; | |
559 | unp_discard(fp); | |
560 | *rp++ = 0; | |
561 | } | |
562 | return (EMSGSIZE); | |
563 | } | |
564 | for (i = 0; i < newfds; i++) { | |
f1ff9444 | 565 | if (ufalloc(0, &f)) |
88a7a62a SL |
566 | panic("unp_externalize"); |
567 | fp = *rp; | |
568 | u.u_ofile[f] = fp; | |
569 | fp->f_msgcount--; | |
6c0894dd | 570 | unp_rights--; |
bb3b4851 | 571 | *(int *)rp++ = f; |
88a7a62a SL |
572 | } |
573 | return (0); | |
574 | } | |
575 | ||
d83a7d17 MK |
576 | unp_internalize(control) |
577 | struct mbuf *control; | |
88a7a62a | 578 | { |
d83a7d17 | 579 | register struct cmsghdr *cm = mtod(control, struct cmsghdr *); |
88a7a62a | 580 | register struct file **rp; |
88a7a62a | 581 | register struct file *fp; |
d83a7d17 MK |
582 | register int i, fd; |
583 | int oldfds; | |
88a7a62a | 584 | |
d83a7d17 MK |
585 | if (cm->cmsg_type != SCM_RIGHTS || cm->cmsg_level != SOL_SOCKET || |
586 | cm->cmsg_len != control->m_len) | |
0293c204 KS |
587 | return (EINVAL); |
588 | oldfds = (cm->cmsg_len - sizeof (*cm)) / sizeof (int); | |
0293c204 | 589 | rp = (struct file **)(cm + 1); |
c4ec2128 KM |
590 | for (i = 0; i < oldfds; i++) { |
591 | fd = *(int *)rp++; | |
592 | if ((unsigned)fd >= NOFILE || u.u_ofile[fd] == NULL) | |
88a7a62a | 593 | return (EBADF); |
c4ec2128 | 594 | } |
0293c204 | 595 | rp = (struct file **)(cm + 1); |
44eb2da3 | 596 | for (i = 0; i < oldfds; i++) { |
c4ec2128 | 597 | fp = u.u_ofile[*(int *)rp]; |
88a7a62a SL |
598 | *rp++ = fp; |
599 | fp->f_count++; | |
600 | fp->f_msgcount++; | |
6c0894dd | 601 | unp_rights++; |
88a7a62a SL |
602 | } |
603 | return (0); | |
604 | } | |
605 | ||
606 | int unp_defer, unp_gcing; | |
607 | int unp_mark(); | |
261a8548 | 608 | extern struct domain unixdomain; |
88a7a62a SL |
609 | |
610 | unp_gc() | |
611 | { | |
612 | register struct file *fp; | |
613 | register struct socket *so; | |
614 | ||
615 | if (unp_gcing) | |
616 | return; | |
617 | unp_gcing = 1; | |
618 | restart: | |
619 | unp_defer = 0; | |
620 | for (fp = file; fp < fileNFILE; fp++) | |
621 | fp->f_flag &= ~(FMARK|FDEFER); | |
622 | do { | |
623 | for (fp = file; fp < fileNFILE; fp++) { | |
624 | if (fp->f_count == 0) | |
625 | continue; | |
626 | if (fp->f_flag & FDEFER) { | |
627 | fp->f_flag &= ~FDEFER; | |
628 | unp_defer--; | |
629 | } else { | |
630 | if (fp->f_flag & FMARK) | |
631 | continue; | |
632 | if (fp->f_count == fp->f_msgcount) | |
633 | continue; | |
634 | fp->f_flag |= FMARK; | |
635 | } | |
aa5945aa MK |
636 | if (fp->f_type != DTYPE_SOCKET || |
637 | (so = (struct socket *)fp->f_data) == 0) | |
88a7a62a | 638 | continue; |
261a8548 | 639 | if (so->so_proto->pr_domain != &unixdomain || |
c5935bca | 640 | (so->so_proto->pr_flags&PR_RIGHTS) == 0) |
88a7a62a | 641 | continue; |
5b09b219 | 642 | #ifdef notdef |
88a7a62a | 643 | if (so->so_rcv.sb_flags & SB_LOCK) { |
5b09b219 MK |
644 | /* |
645 | * This is problematical; it's not clear | |
646 | * we need to wait for the sockbuf to be | |
647 | * unlocked (on a uniprocessor, at least), | |
648 | * and it's also not clear what to do | |
649 | * if sbwait returns an error due to receipt | |
650 | * of a signal. If sbwait does return | |
651 | * an error, we'll go into an infinite | |
652 | * loop. Delete all of this for now. | |
653 | */ | |
654 | (void) sbwait(&so->so_rcv); | |
88a7a62a SL |
655 | goto restart; |
656 | } | |
5b09b219 | 657 | #endif |
88a7a62a SL |
658 | unp_scan(so->so_rcv.sb_mb, unp_mark); |
659 | } | |
660 | } while (unp_defer); | |
661 | for (fp = file; fp < fileNFILE; fp++) { | |
662 | if (fp->f_count == 0) | |
663 | continue; | |
6c0894dd MK |
664 | if (fp->f_count == fp->f_msgcount && (fp->f_flag & FMARK) == 0) |
665 | while (fp->f_msgcount) | |
666 | unp_discard(fp); | |
88a7a62a SL |
667 | } |
668 | unp_gcing = 0; | |
669 | } | |
670 | ||
261a8548 MK |
671 | unp_dispose(m) |
672 | struct mbuf *m; | |
673 | { | |
674 | int unp_discard(); | |
675 | ||
148703ec MK |
676 | if (m) |
677 | unp_scan(m, unp_discard); | |
261a8548 MK |
678 | } |
679 | ||
680 | unp_scan(m0, op) | |
681 | register struct mbuf *m0; | |
88a7a62a SL |
682 | int (*op)(); |
683 | { | |
261a8548 | 684 | register struct mbuf *m; |
88a7a62a | 685 | register struct file **rp; |
d83a7d17 | 686 | register struct cmsghdr *cm; |
88a7a62a | 687 | register int i; |
148703ec | 688 | int qfds; |
261a8548 MK |
689 | |
690 | while (m0) { | |
691 | for (m = m0; m; m = m->m_next) | |
d83a7d17 MK |
692 | if (m->m_type == MT_CONTROL && |
693 | m->m_len >= sizeof(*cm)) { | |
0293c204 | 694 | cm = mtod(m, struct cmsghdr *); |
d83a7d17 MK |
695 | if (cm->cmsg_level != SOL_SOCKET || |
696 | cm->cmsg_type != SCM_RIGHTS) | |
697 | continue; | |
0293c204 KS |
698 | qfds = (cm->cmsg_len - sizeof *cm) |
699 | / sizeof (struct file *); | |
700 | rp = (struct file **)(cm + 1); | |
261a8548 MK |
701 | for (i = 0; i < qfds; i++) |
702 | (*op)(*rp++); | |
703 | break; /* XXX, but saves time */ | |
704 | } | |
148703ec | 705 | m0 = m0->m_act; |
88a7a62a | 706 | } |
88a7a62a SL |
707 | } |
708 | ||
709 | unp_mark(fp) | |
710 | struct file *fp; | |
711 | { | |
712 | ||
713 | if (fp->f_flag & FMARK) | |
714 | return; | |
715 | unp_defer++; | |
716 | fp->f_flag |= (FMARK|FDEFER); | |
717 | } | |
718 | ||
719 | unp_discard(fp) | |
720 | struct file *fp; | |
721 | { | |
722 | ||
723 | fp->f_msgcount--; | |
6c0894dd | 724 | unp_rights--; |
69be5b7a | 725 | (void) closef(fp); |
88a7a62a | 726 | } |