2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #include <afsconfig.h>
11 #include "afs/param.h"
15 #include <sys/malloc.h>
16 #include "rx/rx_kcommon.h"
18 #ifdef RXK_LISTENER_ENV
20 osi_NetReceive(osi_socket asocket, struct sockaddr_in *addr,
21 struct iovec *dvec, int nvecs, int *alength)
25 struct iovec iov[RX_MAXIOVECS];
26 struct sockaddr *sa = NULL;
29 int haveGlock = ISAFS_GLOCK();
30 /*AFS_STATCNT(osi_NetReceive); */
32 if (nvecs > RX_MAXIOVECS)
33 osi_Panic("osi_NetReceive: %d: Too many iovecs.\n", nvecs);
35 for (i = 0; i < nvecs; i++)
41 u.uio_resid = *alength;
42 u.uio_segflg = UIO_SYSSPACE;
52 code = soreceive(asocket, &sa, &u, NULL, NULL, NULL);
59 Debugger("afs NetReceive busted");
66 *alength -= u.uio_resid;
68 if (sa->sa_family == AF_INET) {
70 *addr = *(struct sockaddr_in *)sa;
72 printf("Unknown socket family %d in NetReceive\n", sa->sa_family);
78 #define so_is_disconn(so) ((so)->so_state & SS_ISDISCONNECTED)
80 extern int rxk_ListenerPid;
82 osi_StopListener(void)
87 * Have to drop global lock to safely do this.
88 * soclose() is currently protected by Giant,
89 * but pfind and psignal are MPSAFE.
91 int haveGlock = ISAFS_GLOCK();
94 soshutdown(rx_socket, 2);
95 #ifndef AFS_FBSD70_ENV
98 p = pfind(rxk_ListenerPid);
99 afs_warn("osi_StopListener: rxk_ListenerPid %lx\n", p);
102 #ifdef AFS_FBSD50_ENV
105 #ifdef AFS_FBSD70_ENV
107 /* Avoid destroying socket until osi_NetReceive has
108 * had a chance to clean up */
112 MUTEX_INIT(&s_mtx, "rx_shutdown_mutex", MUTEX_DEFAULT, 0);
115 while ((tries > 0) && (!so_is_disconn(rx_socket))) {
116 msleep(&osi_StopListener, &s_mtx, PSOCK | PCATCH,
117 "rx_shutdown_timedwait", 1 * hz);
120 if (so_is_disconn(rx_socket))
123 MUTEX_DESTROY(&s_mtx);
131 osi_NetSend(osi_socket asocket, struct sockaddr_in *addr, struct iovec *dvec,
132 int nvecs, afs_int32 alength, int istack)
134 register afs_int32 code;
136 struct iovec iov[RX_MAXIOVECS];
138 int haveGlock = ISAFS_GLOCK();
140 AFS_STATCNT(osi_NetSend);
141 if (nvecs > RX_MAXIOVECS)
142 osi_Panic("osi_NetSend: %d: Too many iovecs.\n", nvecs);
144 for (i = 0; i < nvecs; i++)
148 u.uio_iovcnt = nvecs;
150 u.uio_resid = alength;
151 u.uio_segflg = UIO_SYSSPACE;
152 u.uio_rw = UIO_WRITE;
153 #ifdef AFS_FBSD50_ENV
159 addr->sin_len = sizeof(struct sockaddr_in);
166 #ifdef AFS_FBSD50_ENV
168 sosend(asocket, (struct sockaddr *)addr, &u, NULL, NULL, 0,
172 sosend(asocket, (struct sockaddr *)addr, &u, NULL, NULL, 0, curproc);
177 Debugger("afs NetSend busted");
187 /* This code *almost* works :( */
188 static struct protosw parent_proto; /* udp proto switch */
189 static void rxk_input(struct mbuf *am, int iphlen);
190 static void rxk_fasttimo(void);
192 /* start intercepting basic calls */
195 register struct protosw *tpro, *last;
199 last = inetdomain.dom_protoswNPROTOSW;
200 for (tpro = inetdomain.dom_protosw; tpro < last; tpro++)
201 if (tpro->pr_protocol == IPPROTO_UDP) {
202 #if 0 /* not exported */
203 /* force UDP checksumming on for AFS */
207 memcpy(&parent_proto, tpro, sizeof(parent_proto));
208 tpro->pr_input = rxk_input;
209 tpro->pr_fasttimo = rxk_fasttimo;
211 * don't bother with pr_drain and pr_ctlinput
212 * until we have something to do
217 osi_Panic("inet:no udp");
222 rxk_input(struct mbuf *am, int iphlen)
225 register unsigned short *tsp;
228 register struct ip *ti;
229 struct udpiphdr *tvu;
233 struct sockaddr_in taddr;
236 int data_len, comp_sum;
241 /* make sure we have base ip and udp headers in first mbuf */
242 if (iphlen > sizeof(struct ip)) {
243 ip_stripoptions(am, NULL);
244 iphlen = sizeof(struct ip);
247 if (am->m_len < sizeof(struct udpiphdr)) {
248 am = m_pullup(am, sizeof(struct udpiphdr));
255 ti = mtod(am, struct ip *);
256 /* skip basic ip hdr */
257 tu = (struct udphdr *)(((char *)ti) + sizeof(struct ip));
259 /* now read the port out */
263 for (tsp = rxk_ports, i = 0; i < MAXRXPORTS; i++) {
264 if (*tsp++ == port) {
265 /* checksum the packet */
267 * Make mbuf data length reflect UDP length.
268 * If not enough data to reflect UDP length, drop.
270 tvu = (struct udpiphdr *)ti;
271 tlen = ntohs((u_short) tvu->ui_ulen);
272 if ((int)ti->ip_len != tlen) {
273 if (tlen > (int)ti->ip_len) {
278 m_adj(am, tlen - (int)ti->ip_len);
280 /* deliver packet to rx */
281 taddr.sin_family = AF_INET; /* compute source address */
282 taddr.sin_port = tu->uh_sport;
283 taddr.sin_addr.s_addr = ti->ip_src.s_addr;
284 taddr.sin_len = sizeof(taddr);
285 tvu = (struct udpiphdr *)ti; /* virtual udp structure, for cksum */
286 /* handle the checksum. Note that this code damages the actual ip
287 * header (replacing it with the virtual one, which is the same size),
288 * so we must ensure we get everything out we need, first */
289 if (tu->uh_sum != 0) {
290 /* if the checksum is there, always check it. It's crazy not
291 * to, unless you can really be sure that your
292 * underlying network (and interfaces and drivers and
293 * DMA hardware, etc!) is error-free. First, fill
294 * in entire virtual ip header. */
295 memset(tvu->ui_i.ih_x1, 0, 9);
296 tvu->ui_len = tvu->ui_ulen;
297 tlen = ntohs((unsigned short)(tvu->ui_ulen));
298 if (in_cksum(am, sizeof(struct ip) + tlen)) {
299 /* checksum, including cksum field, doesn't come out 0, so
300 * this packet is bad */
308 * 28 is IP (20) + UDP (8) header. ulen includes
309 * udp header, and we *don't* tell RX about udp
310 * header either. So, we remove those 8 as well.
312 data_len = ntohs(tu->uh_ulen);
314 if (!(*rxk_GetPacketProc) (&phandle, data_len)) {
315 if (rx_mb_to_packet(am, m_freem, 28, data_len, phandle)) {
316 /* XXX should just increment counter here.. */
317 printf("rx: truncated UDP packet\n");
318 rxi_FreePacket(phandle);
320 (*rxk_PacketArrivalProc) (phandle, &taddr,
321 rxk_portRocks[i], data_len);
330 /* if we get here, try to deliver packet to udp */
331 if (tproc = parent_proto.pr_input)
332 (*tproc) (am, iphlen);
339 * UDP fast timer to raise events for all but Solaris and NCR.
340 * Called about 5 times per second (at unknown priority?). Must go to
341 * splnet or obtain global lock before touching anything significant.
349 /* do rx fasttimo processing here */
350 rxevent_RaiseEvents(&temp);
351 if (tproc = parent_proto.pr_fasttimo)
355 /* rx_NetSend - send asize bytes at adata from asocket to host at addr.
357 * Now, why do we allocate a new buffer when we could theoretically use the one
358 * pointed to by adata? Because PRU_SEND returns after queueing the message,
359 * not after sending it. If the sender changes the data after queueing it,
360 * we'd see the already-queued data change. One attempt to fix this without
361 * adding a copy would be to have this function wait until the datagram is
362 * sent; however this doesn't work well. In particular, if a host is down, and
363 * an ARP fails to that host, this packet will be queued until the ARP request
364 * comes back, which could be hours later. We can't block in this routine that
365 * long, since it prevents RPC timeouts from happening.
367 /* XXX In the brave new world, steal the data bufs out of the rx_packet iovec,
368 * and just queue those. XXX
371 /* set lock on sockbuf sb; can't call sblock since we're at interrupt level
375 register struct sockbuf *sb;
377 AFS_STATCNT(trysblock);
378 if (sb->sb_flags & SB_LOCK) {
379 return -1; /* can't lock socket */
381 sb->sb_flags |= SB_LOCK;
385 /* We only have to do all the mbuf management ourselves if we can be called at
386 interrupt time. in RXK_LISTENER_ENV, we can just call sosend() */
388 osi_NetSend(osi_socket asocket, struct sockaddr_in *addr, struct iovec *dvec,
389 int nvec, afs_int32 asize, int istack)
391 register struct mbuf *tm, *um;
392 register afs_int32 code;
394 struct mbuf *top = 0;
395 register struct mbuf *m, **mp;
403 static int before = 0;
406 AFS_STATCNT(osi_NetSend);
407 /* Actually, the Ultrix way is as good as any for us, so we don't bother with
408 * special mbufs any more. Used to think we could get away with not copying
409 * the data to the interface, but there's no way to tell the caller not to
410 * reuse the buffers after sending, so we lost out on that trick anyway */
412 if (trysblock(&asocket->so_snd)) {
418 tdata = dvec[i].iov_base;
419 tl = dvec[i].iov_len;
423 MGETHDR(m, M_DONTWAIT, MT_DATA);
425 sbunlock(&asocket->so_snd);
431 m->m_pkthdr.rcvif = NULL;
433 MGET(m, M_DONTWAIT, MT_DATA);
435 /* can't get an mbuf, give up */
437 m_freem(top); /* free mbuf list we're building */
438 sbunlock(&asocket->so_snd);
443 * WARNING: the `4 * MLEN' is somewhat dubious. It is better than
444 * `NBPG', which may have no relation to `CLBYTES'. Also, `CLBYTES'
445 * may be so large that we never use clusters, resulting in far
446 * too many mbufs being used. It is often better to briefly use
447 * a cluster, even if we are only using a portion of it. Since
448 * we are on the xmit side, it shouldn't end up sitting on a queue
449 * for a potentially unbounded time (except perhaps if we are talking
452 if (asize >= 4 * MLEN) { /* try to get cluster mbuf */
453 /* different algorithms for getting cluster mbuf */
454 MCLGET(m, M_DONTWAIT);
455 if ((m->m_flags & M_EXT) == 0)
459 /* now compute usable size */
460 len = MIN(mlen, asize);
461 /* Should I look at MAPPED_MBUFS??? */
464 len = MIN(mlen, asize);
468 top->m_pkthdr.len += len;
469 tpa = mtod(m, caddr_t);
472 memcpy(tpa, tdata, rlen);
482 /* shouldn't come here! */
483 asize = 0; /* so we make progress toward completion */
486 tdata = dvec[i].iov_base;
487 tl = dvec[i].iov_len;
499 /* setup mbuf corresponding to destination address */
500 um = m_get(M_DONTWAIT, MT_SONAME);
503 m_freem(top); /* free mbuf chain */
504 sbunlock(&asocket->so_snd);
508 memcpy(mtod(um, caddr_t), addr, sizeof(*addr));
509 addr->sin_len = um->m_len = sizeof(*addr);
510 /* note that udp_usrreq frees funny mbuf. We hold onto data, but mbuf
511 * around it is gone. */
512 /* haveGlock = ISAFS_GLOCK();
516 /* SOCKET_LOCK(asocket); */
517 /* code = (*asocket->so_proto->pr_usrreq)(asocket, PRU_SEND, tm, um, 0); */
520 Debugger("afs NetSend before");
523 (*asocket->so_proto->pr_usrreqs->pru_send) (asocket, 0, tm,
526 /* SOCKET_UNLOCK(asocket); */
530 sbunlock(&asocket->so_snd);
535 Debugger("afs NetSend busted");
544 #endif /* AFS_FBSD40_ENV */