-/* udp_usrreq.c 4.51 83/07/25 */
+/*
+ * Copyright (c) 1982 Regents of the University of California.
+ * All rights reserved. The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ *
+ * @(#)udp_usrreq.c 6.21 (Berkeley) %G%
+ */
-#include "../h/param.h"
-#include "../h/dir.h"
-#include "../h/user.h"
-#include "../h/mbuf.h"
-#include "../h/protosw.h"
-#include "../h/socket.h"
-#include "../h/socketvar.h"
-#include "../h/errno.h"
+#include "param.h"
+#include "dir.h"
+#include "user.h"
+#include "mbuf.h"
+#include "protosw.h"
+#include "socket.h"
+#include "socketvar.h"
+#include "errno.h"
+#include "stat.h"
#include "../net/if.h"
#include "../net/route.h"
-#include "../netinet/in.h"
-#include "../netinet/in_pcb.h"
-#include "../netinet/in_systm.h"
-#include "../netinet/ip.h"
-#include "../netinet/ip_var.h"
-#include "../netinet/ip_icmp.h"
-#include "../netinet/udp.h"
-#include "../netinet/udp_var.h"
+#include "in.h"
+#include "in_pcb.h"
+#include "in_systm.h"
+#include "ip.h"
+#include "ip_var.h"
+#include "ip_icmp.h"
+#include "udp.h"
+#include "udp_var.h"
/*
* UDP protocol implementation.
udb.inp_next = udb.inp_prev = &udb;
}
-int udpcksum;
+#ifndef COMPAT_42
+int udpcksum = 1;
+#else
+int udpcksum = 0; /* XXX */
+#endif
+
struct sockaddr_in udp_in = { AF_INET };
-udp_input(m0)
+udp_input(m0, ifp)
struct mbuf *m0;
+ struct ifnet *ifp;
{
register struct udpiphdr *ui;
register struct inpcb *inp;
register struct mbuf *m;
int len;
+ struct ip ip;
/*
* Get IP and UDP header together in first mbuf.
udpstat.udps_badlen++;
goto bad;
}
- m_adj(m, ((struct ip *)ui)->ip_len - len);
- /* (struct ip *)ui->ip_len = len; */
+ m_adj(m, len - ((struct ip *)ui)->ip_len);
+ /* ((struct ip *)ui)->ip_len = len; */
}
+ /*
+ * Save a copy of the IP header in case we want restore it for ICMP.
+ */
+ ip = *(struct ip*)ui;
/*
* Checksum extended UDP header and data.
*/
- if (udpcksum) {
+ if (udpcksum && ui->ui_sum) {
ui->ui_next = ui->ui_prev = 0;
ui->ui_x1 = 0;
- ui->ui_len = htons((u_short)len);
+ ui->ui_len = ui->ui_ulen;
if (ui->ui_sum = in_cksum(m, len + sizeof (struct ip))) {
udpstat.udps_badsum++;
m_freem(m);
INPLOOKUP_WILDCARD);
if (inp == 0) {
/* don't send ICMP response for broadcast packet */
- if (in_lnaof(ui->ui_dst) == INADDR_ANY)
+ if (in_broadcast(ui->ui_dst))
goto bad;
- icmp_error((struct ip *)ui, ICMP_UNREACH, ICMP_UNREACH_PORT);
+ *(struct ip *)ui = ip;
+ icmp_error((struct ip *)ui, ICMP_UNREACH, ICMP_UNREACH_PORT,
+ ifp);
return;
}
m_freem(m);
}
-udp_abort(inp)
- struct inpcb *inp;
+/*
+ * Notify a udp user of an asynchronous error;
+ * just wake up so that he can collect error status.
+ */
+udp_notify(inp)
+ register struct inpcb *inp;
{
- struct socket *so = inp->inp_socket;
- in_pcbdisconnect(inp);
- soisdisconnected(so);
+ sorwakeup(inp->inp_socket);
+ sowwakeup(inp->inp_socket);
}
-udp_ctlinput(cmd, arg)
+udp_ctlinput(cmd, sa)
int cmd;
- caddr_t arg;
+ struct sockaddr *sa;
{
- struct in_addr *sin;
extern u_char inetctlerrmap[];
+ struct sockaddr_in *sin;
+ int in_rtchange();
- if (cmd < 0 || cmd > PRC_NCMDS)
+ if ((unsigned)cmd > PRC_NCMDS)
+ return;
+ if (sa->sa_family != AF_INET && sa->sa_family != AF_IMPLINK)
+ return;
+ sin = (struct sockaddr_in *)sa;
+ if (sin->sin_addr.s_addr == INADDR_ANY)
return;
- switch (cmd) {
- case PRC_ROUTEDEAD:
- break;
+ switch (cmd) {
case PRC_QUENCH:
break;
- /* these are handled by ip */
- case PRC_IFDOWN:
- case PRC_HOSTDEAD:
- case PRC_HOSTUNREACH:
+ case PRC_ROUTEDEAD:
+ case PRC_REDIRECT_NET:
+ case PRC_REDIRECT_HOST:
+ case PRC_REDIRECT_TOSNET:
+ case PRC_REDIRECT_TOSHOST:
+ in_pcbnotify(&udb, &sin->sin_addr, 0, in_rtchange);
break;
default:
- sin = &((struct icmp *)arg)->icmp_ip.ip_dst;
- in_pcbnotify(&udb, sin, (int)inetctlerrmap[cmd], udp_abort);
+ if (inetctlerrmap[cmd] == 0)
+ return; /* XXX */
+ in_pcbnotify(&udb, &sin->sin_addr, (int)inetctlerrmap[cmd],
+ udp_notify);
}
}
udp_output(inp, m0)
- struct inpcb *inp;
+ register struct inpcb *inp;
struct mbuf *m0;
{
register struct mbuf *m;
register struct udpiphdr *ui;
- register struct socket *so;
register int len = 0;
- int flags;
/*
* Calculate data length and get a mbuf
*/
for (m = m0; m; m = m->m_next)
len += m->m_len;
- m = m_get(M_DONTWAIT, MT_HEADER);
+ MGET(m, M_DONTWAIT, MT_HEADER);
if (m == 0) {
m_freem(m0);
return (ENOBUFS);
ui->ui_next = ui->ui_prev = 0;
ui->ui_x1 = 0;
ui->ui_pr = IPPROTO_UDP;
- ui->ui_len = len + sizeof (struct udphdr);
+ ui->ui_len = htons((u_short)len + sizeof (struct udphdr));
ui->ui_src = inp->inp_laddr;
ui->ui_dst = inp->inp_faddr;
ui->ui_sport = inp->inp_lport;
ui->ui_dport = inp->inp_fport;
- ui->ui_ulen = htons((u_short)ui->ui_len);
+ ui->ui_ulen = ui->ui_len;
/*
* Stuff checksum and output datagram.
*/
ui->ui_sum = 0;
- ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len);
+ if (udpcksum) {
+ if ((ui->ui_sum = in_cksum(m, sizeof (struct udpiphdr) + len)) == 0)
+ ui->ui_sum = -1;
+ }
((struct ip *)ui)->ip_len = sizeof (struct udpiphdr) + len;
- ((struct ip *)ui)->ip_ttl = MAXTTL;
- so = inp->inp_socket;
- flags = (so->so_options & SO_DONTROUTE) | (so->so_state & SS_PRIV);
- return (ip_output(m, (struct mbuf *)0, (struct route *)0, flags));
+ ((struct ip *)ui)->ip_ttl = UDP_TTL;
+ return (ip_output(m, inp->inp_options, &inp->inp_route,
+ inp->inp_socket->so_options & (SO_DONTROUTE | SO_BROADCAST)));
}
+int udp_sendspace = 2048; /* really max datagram size */
+int udp_recvspace = 4 * (1024+sizeof(struct sockaddr_in)); /* 4 1K dgrams */
+
/*ARGSUSED*/
udp_usrreq(so, req, m, nam, rights)
struct socket *so;
struct inpcb *inp = sotoinpcb(so);
int error = 0;
+ if (req == PRU_CONTROL)
+ return (in_control(so, (int)m, (caddr_t)nam,
+ (struct ifnet *)rights));
if (rights && rights->m_len) {
error = EINVAL;
goto release;
error = in_pcballoc(so, &udb);
if (error)
break;
- error = soreserve(so, 2048, 2048);
+ error = soreserve(so, udp_sendspace, udp_recvspace);
if (error)
break;
break;
case PRU_DETACH:
- if (inp == NULL) {
- error = ENOTCONN;
- break;
- }
in_pcbdetach(inp);
break;
break;
}
in_pcbdisconnect(inp);
- soisdisconnected(so);
+ so->so_state &= ~SS_ISCONNECTED; /* XXX */
break;
case PRU_SHUTDOWN:
case PRU_SEND: {
struct in_addr laddr;
+ int s;
if (nam) {
laddr = inp->inp_laddr;
error = EISCONN;
break;
}
+ /*
+ * Must block input while temporarily connected.
+ */
+ s = splnet();
error = in_pcbconnect(inp, nam);
- if (error)
+ if (error) {
+ splx(s);
break;
+ }
} else {
if (inp->inp_faddr.s_addr == INADDR_ANY) {
error = ENOTCONN;
if (nam) {
in_pcbdisconnect(inp);
inp->inp_laddr = laddr;
+ splx(s);
}
}
break;
in_setpeeraddr(inp, nam);
break;
- case PRU_CONTROL:
- m = NULL;
- error = EOPNOTSUPP;
- break;
-
case PRU_SENSE:
- m = NULL;
- /* fall thru... */
+ /*
+ * stat: don't bother with a blocksize.
+ */
+ return (0);
- case PRU_RCVD:
- case PRU_RCVOOB:
case PRU_SENDOOB:
case PRU_FASTTIMO:
case PRU_SLOWTIMO:
error = EOPNOTSUPP;
break;
+ case PRU_RCVD:
+ case PRU_RCVOOB:
+ return (EOPNOTSUPP); /* do not free mbuf's */
+
default:
panic("udp_usrreq");
}