mirror of
https://github.com/qemu/qemu.git
synced 2024-12-07 02:33:40 +08:00
51a36cb2cb
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1500 c046a42c-6fe2-441c-8c8c-71466251a162
673 lines
17 KiB
C
673 lines
17 KiB
C
/*
|
|
* Copyright (c) 1982, 1986, 1988, 1990, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)udp_usrreq.c 8.4 (Berkeley) 1/21/94
|
|
* udp_usrreq.c,v 1.4 1994/10/02 17:48:45 phk Exp
|
|
*/
|
|
|
|
/*
|
|
* Changes and additions relating to SLiRP
|
|
* Copyright (c) 1995 Danny Gasparovski.
|
|
*
|
|
* Please read the file COPYRIGHT for the
|
|
* terms and conditions of the copyright.
|
|
*/
|
|
|
|
#include <slirp.h>
|
|
#include "ip_icmp.h"
|
|
|
|
struct udpstat udpstat;
|
|
|
|
struct socket udb;
|
|
|
|
/*
|
|
* UDP protocol implementation.
|
|
* Per RFC 768, August, 1980.
|
|
*/
|
|
#ifndef COMPAT_42
|
|
int udpcksum = 1;
|
|
#else
|
|
int udpcksum = 0; /* XXX */
|
|
#endif
|
|
|
|
struct socket *udp_last_so = &udb;
|
|
|
|
void
|
|
udp_init()
|
|
{
|
|
udb.so_next = udb.so_prev = &udb;
|
|
}
|
|
/* m->m_data points at ip packet header
|
|
* m->m_len length ip packet
|
|
* ip->ip_len length data (IPDU)
|
|
*/
|
|
void
|
|
udp_input(m, iphlen)
|
|
register struct mbuf *m;
|
|
int iphlen;
|
|
{
|
|
register struct ip *ip;
|
|
register struct udphdr *uh;
|
|
/* struct mbuf *opts = 0;*/
|
|
int len;
|
|
struct ip save_ip;
|
|
struct socket *so;
|
|
|
|
DEBUG_CALL("udp_input");
|
|
DEBUG_ARG("m = %lx", (long)m);
|
|
DEBUG_ARG("iphlen = %d", iphlen);
|
|
|
|
udpstat.udps_ipackets++;
|
|
|
|
/*
|
|
* Strip IP options, if any; should skip this,
|
|
* make available to user, and use on returned packets,
|
|
* but we don't yet have a way to check the checksum
|
|
* with options still present.
|
|
*/
|
|
if(iphlen > sizeof(struct ip)) {
|
|
ip_stripoptions(m, (struct mbuf *)0);
|
|
iphlen = sizeof(struct ip);
|
|
}
|
|
|
|
/*
|
|
* Get IP and UDP header together in first mbuf.
|
|
*/
|
|
ip = mtod(m, struct ip *);
|
|
uh = (struct udphdr *)((caddr_t)ip + iphlen);
|
|
|
|
/*
|
|
* Make mbuf data length reflect UDP length.
|
|
* If not enough data to reflect UDP length, drop.
|
|
*/
|
|
len = ntohs((u_int16_t)uh->uh_ulen);
|
|
|
|
if (ip->ip_len != len) {
|
|
if (len > ip->ip_len) {
|
|
udpstat.udps_badlen++;
|
|
goto bad;
|
|
}
|
|
m_adj(m, len - ip->ip_len);
|
|
ip->ip_len = len;
|
|
}
|
|
|
|
/*
|
|
* Save a copy of the IP header in case we want restore it
|
|
* for sending an ICMP error message in response.
|
|
*/
|
|
save_ip = *ip;
|
|
save_ip.ip_len+= iphlen; /* tcp_input subtracts this */
|
|
|
|
/*
|
|
* Checksum extended UDP header and data.
|
|
*/
|
|
if (udpcksum && uh->uh_sum) {
|
|
((struct ipovly *)ip)->ih_next = 0;
|
|
((struct ipovly *)ip)->ih_prev = 0;
|
|
((struct ipovly *)ip)->ih_x1 = 0;
|
|
((struct ipovly *)ip)->ih_len = uh->uh_ulen;
|
|
/* keep uh_sum for ICMP reply
|
|
* uh->uh_sum = cksum(m, len + sizeof (struct ip));
|
|
* if (uh->uh_sum) {
|
|
*/
|
|
if(cksum(m, len + sizeof(struct ip))) {
|
|
udpstat.udps_badsum++;
|
|
goto bad;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* handle DHCP/BOOTP
|
|
*/
|
|
if (ntohs(uh->uh_dport) == BOOTP_SERVER) {
|
|
bootp_input(m);
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* handle TFTP
|
|
*/
|
|
if (ntohs(uh->uh_dport) == TFTP_SERVER) {
|
|
tftp_input(m);
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* Locate pcb for datagram.
|
|
*/
|
|
so = udp_last_so;
|
|
if (so->so_lport != uh->uh_sport ||
|
|
so->so_laddr.s_addr != ip->ip_src.s_addr) {
|
|
struct socket *tmp;
|
|
|
|
for (tmp = udb.so_next; tmp != &udb; tmp = tmp->so_next) {
|
|
if (tmp->so_lport == uh->uh_sport &&
|
|
tmp->so_laddr.s_addr == ip->ip_src.s_addr) {
|
|
tmp->so_faddr.s_addr = ip->ip_dst.s_addr;
|
|
tmp->so_fport = uh->uh_dport;
|
|
so = tmp;
|
|
break;
|
|
}
|
|
}
|
|
if (tmp == &udb) {
|
|
so = NULL;
|
|
} else {
|
|
udpstat.udpps_pcbcachemiss++;
|
|
udp_last_so = so;
|
|
}
|
|
}
|
|
|
|
if (so == NULL) {
|
|
/*
|
|
* If there's no socket for this packet,
|
|
* create one
|
|
*/
|
|
if ((so = socreate()) == NULL) goto bad;
|
|
if(udp_attach(so) == -1) {
|
|
DEBUG_MISC((dfd," udp_attach errno = %d-%s\n",
|
|
errno,strerror(errno)));
|
|
sofree(so);
|
|
goto bad;
|
|
}
|
|
|
|
/*
|
|
* Setup fields
|
|
*/
|
|
/* udp_last_so = so; */
|
|
so->so_laddr = ip->ip_src;
|
|
so->so_lport = uh->uh_sport;
|
|
so->so_faddr = ip->ip_dst; /* XXX */
|
|
so->so_fport = uh->uh_dport; /* XXX */
|
|
|
|
if ((so->so_iptos = udp_tos(so)) == 0)
|
|
so->so_iptos = ip->ip_tos;
|
|
|
|
/*
|
|
* XXXXX Here, check if it's in udpexec_list,
|
|
* and if it is, do the fork_exec() etc.
|
|
*/
|
|
}
|
|
|
|
iphlen += sizeof(struct udphdr);
|
|
m->m_len -= iphlen;
|
|
m->m_data += iphlen;
|
|
|
|
/*
|
|
* Now we sendto() the packet.
|
|
*/
|
|
if (so->so_emu)
|
|
udp_emu(so, m);
|
|
|
|
if(sosendto(so,m) == -1) {
|
|
m->m_len += iphlen;
|
|
m->m_data -= iphlen;
|
|
*ip=save_ip;
|
|
DEBUG_MISC((dfd,"udp tx errno = %d-%s\n",errno,strerror(errno)));
|
|
icmp_error(m, ICMP_UNREACH,ICMP_UNREACH_NET, 0,strerror(errno));
|
|
}
|
|
|
|
m_free(so->so_m); /* used for ICMP if error on sorecvfrom */
|
|
|
|
/* restore the orig mbuf packet */
|
|
m->m_len += iphlen;
|
|
m->m_data -= iphlen;
|
|
*ip=save_ip;
|
|
so->so_m=m; /* ICMP backup */
|
|
|
|
return;
|
|
bad:
|
|
m_freem(m);
|
|
/* if (opts) m_freem(opts); */
|
|
return;
|
|
}
|
|
|
|
int udp_output2(struct socket *so, struct mbuf *m,
|
|
struct sockaddr_in *saddr, struct sockaddr_in *daddr,
|
|
int iptos)
|
|
{
|
|
register struct udpiphdr *ui;
|
|
int error = 0;
|
|
|
|
DEBUG_CALL("udp_output");
|
|
DEBUG_ARG("so = %lx", (long)so);
|
|
DEBUG_ARG("m = %lx", (long)m);
|
|
DEBUG_ARG("saddr = %lx", (long)saddr->sin_addr.s_addr);
|
|
DEBUG_ARG("daddr = %lx", (long)daddr->sin_addr.s_addr);
|
|
|
|
/*
|
|
* Adjust for header
|
|
*/
|
|
m->m_data -= sizeof(struct udpiphdr);
|
|
m->m_len += sizeof(struct udpiphdr);
|
|
|
|
/*
|
|
* Fill in mbuf with extended UDP header
|
|
* and addresses and length put into network format.
|
|
*/
|
|
ui = mtod(m, struct udpiphdr *);
|
|
ui->ui_next = ui->ui_prev = 0;
|
|
ui->ui_x1 = 0;
|
|
ui->ui_pr = IPPROTO_UDP;
|
|
ui->ui_len = htons(m->m_len - sizeof(struct ip)); /* + sizeof (struct udphdr)); */
|
|
/* XXXXX Check for from-one-location sockets, or from-any-location sockets */
|
|
ui->ui_src = saddr->sin_addr;
|
|
ui->ui_dst = daddr->sin_addr;
|
|
ui->ui_sport = saddr->sin_port;
|
|
ui->ui_dport = daddr->sin_port;
|
|
ui->ui_ulen = ui->ui_len;
|
|
|
|
/*
|
|
* Stuff checksum and output datagram.
|
|
*/
|
|
ui->ui_sum = 0;
|
|
if (udpcksum) {
|
|
if ((ui->ui_sum = cksum(m, /* sizeof (struct udpiphdr) + */ m->m_len)) == 0)
|
|
ui->ui_sum = 0xffff;
|
|
}
|
|
((struct ip *)ui)->ip_len = m->m_len;
|
|
|
|
((struct ip *)ui)->ip_ttl = ip_defttl;
|
|
((struct ip *)ui)->ip_tos = iptos;
|
|
|
|
udpstat.udps_opackets++;
|
|
|
|
error = ip_output(so, m);
|
|
|
|
return (error);
|
|
}
|
|
|
|
int udp_output(struct socket *so, struct mbuf *m,
|
|
struct sockaddr_in *addr)
|
|
|
|
{
|
|
struct sockaddr_in saddr, daddr;
|
|
|
|
saddr = *addr;
|
|
if ((so->so_faddr.s_addr & htonl(0xffffff00)) == special_addr.s_addr)
|
|
saddr.sin_addr.s_addr = so->so_faddr.s_addr;
|
|
daddr.sin_addr = so->so_laddr;
|
|
daddr.sin_port = so->so_lport;
|
|
|
|
return udp_output2(so, m, &saddr, &daddr, so->so_iptos);
|
|
}
|
|
|
|
int
|
|
udp_attach(so)
|
|
struct socket *so;
|
|
{
|
|
struct sockaddr_in addr;
|
|
|
|
if((so->s = socket(AF_INET,SOCK_DGRAM,0)) != -1) {
|
|
/*
|
|
* Here, we bind() the socket. Although not really needed
|
|
* (sendto() on an unbound socket will bind it), it's done
|
|
* here so that emulation of ytalk etc. don't have to do it
|
|
*/
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = 0;
|
|
addr.sin_addr.s_addr = INADDR_ANY;
|
|
if(bind(so->s, (struct sockaddr *)&addr, sizeof(addr))<0) {
|
|
int lasterrno=errno;
|
|
closesocket(so->s);
|
|
so->s=-1;
|
|
#ifdef _WIN32
|
|
WSASetLastError(lasterrno);
|
|
#else
|
|
errno=lasterrno;
|
|
#endif
|
|
} else {
|
|
/* success, insert in queue */
|
|
so->so_expire = curtime + SO_EXPIRE;
|
|
insque(so,&udb);
|
|
}
|
|
}
|
|
return(so->s);
|
|
}
|
|
|
|
void
|
|
udp_detach(so)
|
|
struct socket *so;
|
|
{
|
|
closesocket(so->s);
|
|
/* if (so->so_m) m_free(so->so_m); done by sofree */
|
|
|
|
sofree(so);
|
|
}
|
|
|
|
struct tos_t udptos[] = {
|
|
{0, 53, IPTOS_LOWDELAY, 0}, /* DNS */
|
|
{517, 517, IPTOS_LOWDELAY, EMU_TALK}, /* talk */
|
|
{518, 518, IPTOS_LOWDELAY, EMU_NTALK}, /* ntalk */
|
|
{0, 7648, IPTOS_LOWDELAY, EMU_CUSEEME}, /* Cu-Seeme */
|
|
{0, 0, 0, 0}
|
|
};
|
|
|
|
u_int8_t
|
|
udp_tos(so)
|
|
struct socket *so;
|
|
{
|
|
int i = 0;
|
|
|
|
while(udptos[i].tos) {
|
|
if ((udptos[i].fport && ntohs(so->so_fport) == udptos[i].fport) ||
|
|
(udptos[i].lport && ntohs(so->so_lport) == udptos[i].lport)) {
|
|
so->so_emu = udptos[i].emu;
|
|
return udptos[i].tos;
|
|
}
|
|
i++;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef EMULATE_TALK
|
|
#include "talkd.h"
|
|
#endif
|
|
|
|
/*
|
|
* Here, talk/ytalk/ntalk requests must be emulated
|
|
*/
|
|
void
|
|
udp_emu(so, m)
|
|
struct socket *so;
|
|
struct mbuf *m;
|
|
{
|
|
struct sockaddr_in addr;
|
|
int addrlen = sizeof(addr);
|
|
#ifdef EMULATE_TALK
|
|
CTL_MSG_OLD *omsg;
|
|
CTL_MSG *nmsg;
|
|
char buff[sizeof(CTL_MSG)];
|
|
u_char type;
|
|
|
|
struct talk_request {
|
|
struct talk_request *next;
|
|
struct socket *udp_so;
|
|
struct socket *tcp_so;
|
|
} *req;
|
|
|
|
static struct talk_request *req_tbl = 0;
|
|
|
|
#endif
|
|
|
|
struct cu_header {
|
|
uint16_t d_family; // destination family
|
|
uint16_t d_port; // destination port
|
|
uint32_t d_addr; // destination address
|
|
uint16_t s_family; // source family
|
|
uint16_t s_port; // source port
|
|
uint32_t so_addr; // source address
|
|
uint32_t seqn; // sequence number
|
|
uint16_t message; // message
|
|
uint16_t data_type; // data type
|
|
uint16_t pkt_len; // packet length
|
|
} *cu_head;
|
|
|
|
switch(so->so_emu) {
|
|
|
|
#ifdef EMULATE_TALK
|
|
case EMU_TALK:
|
|
case EMU_NTALK:
|
|
/*
|
|
* Talk emulation. We always change the ctl_addr to get
|
|
* some answers from the daemon. When an ANNOUNCE comes,
|
|
* we send LEAVE_INVITE to the local daemons. Also when a
|
|
* DELETE comes, we send copies to the local daemons.
|
|
*/
|
|
if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0)
|
|
return;
|
|
|
|
#define IS_OLD (so->so_emu == EMU_TALK)
|
|
|
|
#define COPY_MSG(dest, src) { dest->type = src->type; \
|
|
dest->id_num = src->id_num; \
|
|
dest->pid = src->pid; \
|
|
dest->addr = src->addr; \
|
|
dest->ctl_addr = src->ctl_addr; \
|
|
memcpy(&dest->l_name, &src->l_name, NAME_SIZE_OLD); \
|
|
memcpy(&dest->r_name, &src->r_name, NAME_SIZE_OLD); \
|
|
memcpy(&dest->r_tty, &src->r_tty, TTY_SIZE); }
|
|
|
|
#define OTOSIN(ptr, field) ((struct sockaddr_in *)&ptr->field)
|
|
/* old_sockaddr to sockaddr_in */
|
|
|
|
|
|
if (IS_OLD) { /* old talk */
|
|
omsg = mtod(m, CTL_MSG_OLD*);
|
|
nmsg = (CTL_MSG *) buff;
|
|
type = omsg->type;
|
|
OTOSIN(omsg, ctl_addr)->sin_port = addr.sin_port;
|
|
OTOSIN(omsg, ctl_addr)->sin_addr = our_addr;
|
|
strncpy(omsg->l_name, getlogin(), NAME_SIZE_OLD);
|
|
} else { /* new talk */
|
|
omsg = (CTL_MSG_OLD *) buff;
|
|
nmsg = mtod(m, CTL_MSG *);
|
|
type = nmsg->type;
|
|
OTOSIN(nmsg, ctl_addr)->sin_port = addr.sin_port;
|
|
OTOSIN(nmsg, ctl_addr)->sin_addr = our_addr;
|
|
strncpy(nmsg->l_name, getlogin(), NAME_SIZE_OLD);
|
|
}
|
|
|
|
if (type == LOOK_UP)
|
|
return; /* for LOOK_UP this is enough */
|
|
|
|
if (IS_OLD) { /* make a copy of the message */
|
|
COPY_MSG(nmsg, omsg);
|
|
nmsg->vers = 1;
|
|
nmsg->answer = 0;
|
|
} else
|
|
COPY_MSG(omsg, nmsg);
|
|
|
|
/*
|
|
* If if is an ANNOUNCE message, we go through the
|
|
* request table to see if a tcp port has already
|
|
* been redirected for this socket. If not, we solisten()
|
|
* a new socket and add this entry to the table.
|
|
* The port number of the tcp socket and our IP
|
|
* are put to the addr field of the message structures.
|
|
* Then a LEAVE_INVITE is sent to both local daemon
|
|
* ports, 517 and 518. This is why we have two copies
|
|
* of the message, one in old talk and one in new talk
|
|
* format.
|
|
*/
|
|
|
|
if (type == ANNOUNCE) {
|
|
int s;
|
|
u_short temp_port;
|
|
|
|
for(req = req_tbl; req; req = req->next)
|
|
if (so == req->udp_so)
|
|
break; /* found it */
|
|
|
|
if (!req) { /* no entry for so, create new */
|
|
req = (struct talk_request *)
|
|
malloc(sizeof(struct talk_request));
|
|
req->udp_so = so;
|
|
req->tcp_so = solisten(0,
|
|
OTOSIN(omsg, addr)->sin_addr.s_addr,
|
|
OTOSIN(omsg, addr)->sin_port,
|
|
SS_FACCEPTONCE);
|
|
req->next = req_tbl;
|
|
req_tbl = req;
|
|
}
|
|
|
|
/* replace port number in addr field */
|
|
addrlen = sizeof(addr);
|
|
getsockname(req->tcp_so->s,
|
|
(struct sockaddr *) &addr,
|
|
&addrlen);
|
|
OTOSIN(omsg, addr)->sin_port = addr.sin_port;
|
|
OTOSIN(omsg, addr)->sin_addr = our_addr;
|
|
OTOSIN(nmsg, addr)->sin_port = addr.sin_port;
|
|
OTOSIN(nmsg, addr)->sin_addr = our_addr;
|
|
|
|
/* send LEAVE_INVITEs */
|
|
temp_port = OTOSIN(omsg, ctl_addr)->sin_port;
|
|
OTOSIN(omsg, ctl_addr)->sin_port = 0;
|
|
OTOSIN(nmsg, ctl_addr)->sin_port = 0;
|
|
omsg->type = nmsg->type = LEAVE_INVITE;
|
|
|
|
s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
|
|
addr.sin_addr = our_addr;
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = htons(517);
|
|
sendto(s, (char *)omsg, sizeof(*omsg), 0,
|
|
(struct sockaddr *)&addr, sizeof(addr));
|
|
addr.sin_port = htons(518);
|
|
sendto(s, (char *)nmsg, sizeof(*nmsg), 0,
|
|
(struct sockaddr *) &addr, sizeof(addr));
|
|
closesocket(s) ;
|
|
|
|
omsg->type = nmsg->type = ANNOUNCE;
|
|
OTOSIN(omsg, ctl_addr)->sin_port = temp_port;
|
|
OTOSIN(nmsg, ctl_addr)->sin_port = temp_port;
|
|
}
|
|
|
|
/*
|
|
* If it is a DELETE message, we send a copy to the
|
|
* local daemons. Then we delete the entry corresponding
|
|
* to our socket from the request table.
|
|
*/
|
|
|
|
if (type == DELETE) {
|
|
struct talk_request *temp_req, *req_next;
|
|
int s;
|
|
u_short temp_port;
|
|
|
|
temp_port = OTOSIN(omsg, ctl_addr)->sin_port;
|
|
OTOSIN(omsg, ctl_addr)->sin_port = 0;
|
|
OTOSIN(nmsg, ctl_addr)->sin_port = 0;
|
|
|
|
s = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
|
|
addr.sin_addr = our_addr;
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = htons(517);
|
|
sendto(s, (char *)omsg, sizeof(*omsg), 0,
|
|
(struct sockaddr *)&addr, sizeof(addr));
|
|
addr.sin_port = htons(518);
|
|
sendto(s, (char *)nmsg, sizeof(*nmsg), 0,
|
|
(struct sockaddr *)&addr, sizeof(addr));
|
|
closesocket(s);
|
|
|
|
OTOSIN(omsg, ctl_addr)->sin_port = temp_port;
|
|
OTOSIN(nmsg, ctl_addr)->sin_port = temp_port;
|
|
|
|
/* delete table entry */
|
|
if (so == req_tbl->udp_so) {
|
|
temp_req = req_tbl;
|
|
req_tbl = req_tbl->next;
|
|
free(temp_req);
|
|
} else {
|
|
temp_req = req_tbl;
|
|
for(req = req_tbl->next; req; req = req_next) {
|
|
req_next = req->next;
|
|
if (so == req->udp_so) {
|
|
temp_req->next = req_next;
|
|
free(req);
|
|
break;
|
|
} else {
|
|
temp_req = req;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return;
|
|
#endif
|
|
|
|
case EMU_CUSEEME:
|
|
|
|
/*
|
|
* Cu-SeeMe emulation.
|
|
* Hopefully the packet is more that 16 bytes long. We don't
|
|
* do any other tests, just replace the address and port
|
|
* fields.
|
|
*/
|
|
if (m->m_len >= sizeof (*cu_head)) {
|
|
if (getsockname(so->s, (struct sockaddr *)&addr, &addrlen) < 0)
|
|
return;
|
|
cu_head = mtod(m, struct cu_header *);
|
|
cu_head->s_port = addr.sin_port;
|
|
cu_head->so_addr = our_addr.s_addr;
|
|
}
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
struct socket *
|
|
udp_listen(port, laddr, lport, flags)
|
|
u_int port;
|
|
u_int32_t laddr;
|
|
u_int lport;
|
|
int flags;
|
|
{
|
|
struct sockaddr_in addr;
|
|
struct socket *so;
|
|
int addrlen = sizeof(struct sockaddr_in), opt = 1;
|
|
|
|
if ((so = socreate()) == NULL) {
|
|
free(so);
|
|
return NULL;
|
|
}
|
|
so->s = socket(AF_INET,SOCK_DGRAM,0);
|
|
so->so_expire = curtime + SO_EXPIRE;
|
|
insque(so,&udb);
|
|
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_addr.s_addr = INADDR_ANY;
|
|
addr.sin_port = port;
|
|
|
|
if (bind(so->s,(struct sockaddr *)&addr, addrlen) < 0) {
|
|
udp_detach(so);
|
|
return NULL;
|
|
}
|
|
setsockopt(so->s,SOL_SOCKET,SO_REUSEADDR,(char *)&opt,sizeof(int));
|
|
/* setsockopt(so->s,SOL_SOCKET,SO_OOBINLINE,(char *)&opt,sizeof(int)); */
|
|
|
|
getsockname(so->s,(struct sockaddr *)&addr,&addrlen);
|
|
so->so_fport = addr.sin_port;
|
|
if (addr.sin_addr.s_addr == 0 || addr.sin_addr.s_addr == loopback_addr.s_addr)
|
|
so->so_faddr = our_addr;
|
|
else
|
|
so->so_faddr = addr.sin_addr;
|
|
|
|
so->so_lport = lport;
|
|
so->so_laddr.s_addr = laddr;
|
|
if (flags != SS_FACCEPTONCE)
|
|
so->so_expire = 0;
|
|
|
|
so->so_state = SS_ISFCONNECTED;
|
|
|
|
return so;
|
|
}
|