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
11 * rx_knet.c - RX kernel send, receive and timer routines.
13 * Linux implementation.
15 #include <afsconfig.h>
16 #include "afs/param.h"
19 #include <linux/version.h>
20 #include "rx/rx_kcommon.h"
21 #include "h/smp_lock.h"
22 #include <asm/uaccess.h>
24 #include <linux/errqueue.h>
25 #include <linux/icmp.h>
28 #include "osi_compat.h"
31 * open and bind RX socket
34 rxk_NewSocketHost(afs_uint32 ahost, short aport)
37 struct sockaddr_in myaddr;
40 int pmtu = IP_PMTUDISC_WANT;
43 int pmtu = IP_PMTUDISC_DONT;
46 /* We need a better test for this. if you need it back, tell us
49 #ifdef LINUX_KERNEL_SOCK_CREATE_V
50 code = sock_create(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &sockp, 0);
52 code = sock_create(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &sockp);
58 myaddr.sin_family = AF_INET;
59 myaddr.sin_addr.s_addr = ahost;
60 myaddr.sin_port = aport;
62 sockp->ops->bind(sockp, (struct sockaddr *)&myaddr, sizeof(myaddr));
65 printk("sock_release(rx_socket) FIXME\n");
69 kernel_setsockopt(sockp, SOL_IP, IP_MTU_DISCOVER, (char *)&pmtu,
72 kernel_setsockopt(sockp, SOL_IP, IP_RECVERR, (char *)&do_recverr,
75 return (osi_socket *)sockp;
79 rxk_NewSocket(short aport)
81 return rxk_NewSocketHost(htonl(INADDR_ANY), aport);
84 /* free socket allocated by osi_NetSocket */
86 rxk_FreeSocket(struct socket *asocket)
88 AFS_STATCNT(osi_FreeSocket);
94 handle_socket_error(osi_socket so)
98 struct sock_extended_err *err;
99 struct sockaddr_in addr;
100 struct sockaddr *offender;
103 struct socket *sop = (struct socket *)so;
105 if (!(controlmsgbuf=rxi_Alloc(256)))
107 msg.msg_name = &addr;
108 msg.msg_namelen = sizeof(addr);
109 msg.msg_control = controlmsgbuf;
110 msg.msg_controllen = 256;
113 code = kernel_recvmsg(sop, &msg, NULL, 0, 0,
114 MSG_ERRQUEUE|MSG_DONTWAIT|MSG_TRUNC);
116 if (code < 0 || !(msg.msg_flags & MSG_ERRQUEUE))
119 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
120 if (CMSG_OK(&msg, cmsg) && cmsg->cmsg_level == SOL_IP &&
121 cmsg->cmsg_type == IP_RECVERR)
126 err = CMSG_DATA(cmsg);
127 offender = SO_EE_OFFENDER(err);
129 if (offender->sa_family != AF_INET)
132 memcpy(&addr, offender, sizeof(addr));
134 if (err->ee_origin == SO_EE_ORIGIN_ICMP &&
135 err->ee_type == ICMP_DEST_UNREACH &&
136 err->ee_code == ICMP_FRAG_NEEDED) {
137 rxi_SetPeerMtu(NULL, ntohl(addr.sin_addr.s_addr), ntohs(addr.sin_port),
140 /* other DEST_UNREACH's and TIME_EXCEEDED should be dealt with too */
143 rxi_Free(controlmsgbuf, 256);
155 osi_NetSend(osi_socket sop, struct sockaddr_in *to, struct iovec *iovec,
156 int iovcnt, afs_int32 size, int istack)
166 esize = sizeof(sockerr);
167 kernel_getsockopt(sop, SOL_SOCKET, SO_ERROR, (char *)&sockerr, &esize);
170 handle_socket_error(sop);
175 msg.msg_namelen = sizeof(*to);
176 msg.msg_control = NULL;
177 msg.msg_controllen = 0;
180 code = kernel_sendmsg(sop, &msg, (struct kvec *) iovec, iovcnt, size);
181 return (code < 0) ? code : 0;
186 * OS dependent part of kernel RX listener thread.
189 * so socket to receive on, typically rx_socket
190 * from pointer to a sockaddr_in.
191 * iov array of iovecs to fill in.
192 * iovcnt how many iovecs there are.
193 * lengthp IN/OUT in: total space available in iovecs. out: size of read.
197 * error code (such as EINTER) if not
200 * Note that the maximum number of iovecs is 2 + RX_MAXWVECS. This is
201 * so we have a little space to look for packets larger than
204 int rxk_lastSocketError;
205 int rxk_nSocketErrors;
207 osi_NetReceive(osi_socket so, struct sockaddr_in *from, struct iovec *iov,
208 int iovcnt, int *lengthp)
216 struct iovec tmpvec[RX_MAXWVECS + 2];
217 struct socket *sop = (struct socket *)so;
219 if (iovcnt > RX_MAXWVECS + 2) {
220 osi_Panic("Too many (%d) iovecs passed to osi_NetReceive\n", iovcnt);
225 esize = sizeof(sockerr);
226 kernel_getsockopt(sop, SOL_SOCKET, SO_ERROR, (char *)&sockerr, &esize);
229 handle_socket_error(so);
232 memcpy(tmpvec, iov, iovcnt * sizeof(struct iovec));
234 msg.msg_iov = tmpvec;
235 msg.msg_iovlen = iovcnt;
236 msg.msg_control = NULL;
237 msg.msg_controllen = 0;
240 code = kernel_recvmsg(sop, &msg, (struct kvec *)tmpvec, iovcnt,
245 /* Clear the error before using the socket again.
246 * Oh joy, Linux has hidden header files as well. It appears we can
247 * simply call again and have it clear itself via sock_error().
249 flush_signals(current); /* We don't want no stinkin' signals. */
250 rxk_lastSocketError = code;
261 osi_StopListener(void)
263 extern struct task_struct *rxk_ListenerTask;
265 while (rxk_ListenerTask) {
266 if (rxk_ListenerTask) {
267 flush_signals(rxk_ListenerTask);
268 force_sig(SIGKILL, rxk_ListenerTask);
270 if (!rxk_ListenerTask)
272 afs_osi_Sleep(&rxk_ListenerTask);
274 sock_release(rx_socket);