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 <asm/uaccess.h>
23 #include <linux/errqueue.h>
24 #include <linux/icmp.h>
27 #include "osi_compat.h"
30 * open and bind RX socket
33 rxk_NewSocketHost(afs_uint32 ahost, short aport)
36 struct sockaddr_in myaddr;
39 int pmtu = IP_PMTUDISC_WANT;
42 int pmtu = IP_PMTUDISC_DONT;
45 /* We need a better test for this. if you need it back, tell us
48 #ifdef LINUX_KERNEL_SOCK_CREATE_V
49 code = sock_create(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &sockp, 0);
51 code = sock_create(AF_INET, SOCK_DGRAM, IPPROTO_UDP, &sockp);
57 myaddr.sin_family = AF_INET;
58 myaddr.sin_addr.s_addr = ahost;
59 myaddr.sin_port = aport;
61 sockp->ops->bind(sockp, (struct sockaddr *)&myaddr, sizeof(myaddr));
64 printk("sock_release(rx_socket) FIXME\n");
68 kernel_setsockopt(sockp, SOL_IP, IP_MTU_DISCOVER, (char *)&pmtu,
71 kernel_setsockopt(sockp, SOL_IP, IP_RECVERR, (char *)&do_recverr,
74 return (osi_socket *)sockp;
78 rxk_NewSocket(short aport)
80 return rxk_NewSocketHost(htonl(INADDR_ANY), aport);
83 /* free socket allocated by osi_NetSocket */
85 rxk_FreeSocket(struct socket *asocket)
87 AFS_STATCNT(osi_FreeSocket);
93 handle_socket_error(osi_socket so)
97 struct sock_extended_err *err;
98 struct sockaddr_in addr;
99 struct sockaddr *offender;
102 struct socket *sop = (struct socket *)so;
104 if (!(controlmsgbuf=rxi_Alloc(256)))
106 msg.msg_name = &addr;
107 msg.msg_namelen = sizeof(addr);
108 msg.msg_control = controlmsgbuf;
109 msg.msg_controllen = 256;
112 code = kernel_recvmsg(sop, &msg, NULL, 0, 0,
113 MSG_ERRQUEUE|MSG_DONTWAIT|MSG_TRUNC);
115 if (code < 0 || !(msg.msg_flags & MSG_ERRQUEUE))
118 for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) {
119 if (CMSG_OK(&msg, cmsg) && cmsg->cmsg_level == SOL_IP &&
120 cmsg->cmsg_type == IP_RECVERR)
125 err = CMSG_DATA(cmsg);
126 offender = SO_EE_OFFENDER(err);
128 if (offender->sa_family != AF_INET)
131 memcpy(&addr, offender, sizeof(addr));
133 if (err->ee_origin == SO_EE_ORIGIN_ICMP &&
134 err->ee_type == ICMP_DEST_UNREACH &&
135 err->ee_code == ICMP_FRAG_NEEDED) {
136 rxi_SetPeerMtu(NULL, ntohl(addr.sin_addr.s_addr), ntohs(addr.sin_port),
139 /* other DEST_UNREACH's and TIME_EXCEEDED should be dealt with too */
142 rxi_Free(controlmsgbuf, 256);
154 osi_NetSend(osi_socket sop, struct sockaddr_in *to, struct iovec *iovec,
155 int iovcnt, afs_int32 size, int istack)
165 esize = sizeof(sockerr);
166 kernel_getsockopt(sop, SOL_SOCKET, SO_ERROR, (char *)&sockerr, &esize);
169 handle_socket_error(sop);
174 msg.msg_namelen = sizeof(*to);
175 msg.msg_control = NULL;
176 msg.msg_controllen = 0;
179 code = kernel_sendmsg(sop, &msg, (struct kvec *) iovec, iovcnt, size);
180 return (code < 0) ? code : 0;
185 * OS dependent part of kernel RX listener thread.
188 * so socket to receive on, typically rx_socket
189 * from pointer to a sockaddr_in.
190 * iov array of iovecs to fill in.
191 * iovcnt how many iovecs there are.
192 * lengthp IN/OUT in: total space available in iovecs. out: size of read.
196 * error code (such as EINTER) if not
199 * Note that the maximum number of iovecs is 2 + RX_MAXWVECS. This is
200 * so we have a little space to look for packets larger than
203 int rxk_lastSocketError;
204 int rxk_nSocketErrors;
206 osi_NetReceive(osi_socket so, struct sockaddr_in *from, struct iovec *iov,
207 int iovcnt, int *lengthp)
215 struct iovec tmpvec[RX_MAXWVECS + 2];
216 struct socket *sop = (struct socket *)so;
218 if (iovcnt > RX_MAXWVECS + 2) {
219 osi_Panic("Too many (%d) iovecs passed to osi_NetReceive\n", iovcnt);
224 esize = sizeof(sockerr);
225 kernel_getsockopt(sop, SOL_SOCKET, SO_ERROR, (char *)&sockerr, &esize);
228 handle_socket_error(so);
231 memcpy(tmpvec, iov, iovcnt * sizeof(struct iovec));
233 msg.msg_iov = tmpvec;
234 msg.msg_iovlen = iovcnt;
235 msg.msg_control = NULL;
236 msg.msg_controllen = 0;
239 code = kernel_recvmsg(sop, &msg, (struct kvec *)tmpvec, iovcnt,
244 /* Clear the error before using the socket again.
245 * Oh joy, Linux has hidden header files as well. It appears we can
246 * simply call again and have it clear itself via sock_error().
248 flush_signals(current); /* We don't want no stinkin' signals. */
249 rxk_lastSocketError = code;
260 osi_StopListener(void)
262 extern struct task_struct *rxk_ListenerTask;
264 while (rxk_ListenerTask) {
265 if (rxk_ListenerTask) {
266 flush_signals(rxk_ListenerTask);
267 force_sig(SIGKILL, rxk_ListenerTask);
269 if (!rxk_ListenerTask)
271 afs_osi_Sleep(&rxk_ListenerTask);
273 sock_release(rx_socket);