ref: a8083462e62459b2ae8a243dc4ba88416eba03b1
dir: /emu/Nt/ipif.c/
#define Unknown win_Unknown
#include <windows.h>
#include <winbase.h>
#include <sys/types.h>
#include <winsock.h>
#undef Unknown
#include "dat.h"
#include "fns.h"
#include "ip.h"
#include "error.h"
typedef int socklen_t; /* Windows is leading edge as always */
extern int SOCK_SELECT;
char Enotv4[] = "address not IPv4";
static void
ipw6(uchar *a, ulong w)
{
memmove(a, v4prefix, IPv4off);
memmove(a+IPv4off, &w, IPv4addrlen);
}
int
so_socket(int type)
{
int fd, one;
switch(type) {
default:
error("bad protocol type");
case S_TCP:
type = SOCK_STREAM;
break;
case S_UDP:
type = SOCK_DGRAM;
break;
}
fd = socket(AF_INET, type, 0);
if(fd < 0)
oserror();
if(type == SOCK_DGRAM){
one = 1;
setsockopt(fd, SOL_SOCKET, SO_BROADCAST, (char*)&one, sizeof(one));
}else{
one = 1;
setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (char*)&one, sizeof(one));
}
return fd;
}
int
so_send(int sock, void *va, int len, void *hdr, int hdrlen)
{
int r;
struct sockaddr sa;
struct sockaddr_in *sin;
uchar *h = hdr;
osenter();
if(hdr == 0)
r = send(sock, va, len, 0);
else {
memset(&sa, 0, sizeof(sa));
sin = (struct sockaddr_in*)&sa;
sin->sin_family = AF_INET;
switch(hdrlen){
case OUdphdrlenv4:
memmove(&sin->sin_addr, h, 4);
memmove(&sin->sin_port, h+8, 2);
break;
case OUdphdrlen:
v6tov4((uchar*)&sin->sin_addr, h);
memmove(&sin->sin_port, h+2*IPaddrlen, 2); /* rport */
break;
default:
v6tov4((uchar*)&sin->sin_addr, h);
memmove(&sin->sin_port, h+3*IPaddrlen, 2);
break;
}
r = sendto(sock, va, len, 0, &sa, sizeof(sa));
}
osleave();
return r;
}
static int
doselect(int sock)
{
fd_set waitr;
struct timeval seltime;
up->syscall = SOCK_SELECT;
FD_ZERO(&waitr);
FD_SET(sock, &waitr);
for(;;){
int nfds;
fd_set in, exc;
in = waitr;
exc = waitr;
seltime.tv_sec = 1;
seltime.tv_usec = 0L;
nfds = select(sizeof(fd_set)*8, &in, (fd_set*)0, &exc, &seltime);
if(up->intwait) {
up->intwait = 0;
return -1;
}
if(nfds < 0) {
print("select error\n");
return 0;
}
if(FD_ISSET(sock, &in) || FD_ISSET(sock, &exc)){
return 0;
}
}
}
int
so_recv(int sock, void *va, int len, void *hdr, int hdrlen)
{
int r;
socklen_t l;
struct sockaddr sa;
struct sockaddr_in *sin;
uchar h[Udphdrlen];
osenter();
if(doselect(sock) < 0) {
osleave();
return -1;
}
if(hdr == 0)
r = recv(sock, va, len, 0);
else {
sin = (struct sockaddr_in*)&sa;
l = sizeof(sa);
r = recvfrom(sock, va, len, 0, &sa, &l);
if(r >= 0) {
memset(h, 0, sizeof(h));
switch(hdrlen){
case OUdphdrlenv4:
memmove(h, &sin->sin_addr, IPv4addrlen);
memmove(h+2*IPv4addrlen, &sin->sin_port, 2);
break;
case OUdphdrlen:
v4tov6(h, (uchar*)&sin->sin_addr);
memmove(h+2*IPaddrlen, &sin->sin_port, 2);
break;
default:
v4tov6(h, (uchar*)&sin->sin_addr);
memmove(h+3*IPaddrlen, &sin->sin_port, 2);
break;
}
/* alas there's no way to get the local addr/port correctly. Pretend. */
memset(&sa, 0, sizeof(sa));
getsockname(sock, &sa, &l);
switch(hdrlen){
case OUdphdrlenv4:
memmove(h+IPv4addrlen, &sin->sin_addr, IPv4addrlen);
memmove(h+2*IPv4addrlen+2, &sin->sin_port, 2);
break;
case OUdphdrlen:
v4tov6(h+IPaddrlen, (uchar*)&sin->sin_addr);
memmove(h+2*IPaddrlen+2, &sin->sin_port, 2);
break;
default:
v4tov6(h+IPaddrlen, (uchar*)&sin->sin_addr);
v4tov6(h+2*IPaddrlen, (uchar*)&sin->sin_addr); /* ifcaddr */
memmove(h+3*IPaddrlen+2, &sin->sin_port, 2);
break;
}
memmove(hdr, h, hdrlen);
}
}
osleave();
return r;
}
void
so_close(int sock)
{
closesocket(sock);
}
void
so_connect(int fd, uchar *raddr, ushort rport)
{
int r;
struct sockaddr sa;
struct sockaddr_in *sin;
if(!isv4(raddr))
error(Enotv4);
memset(&sa, 0, sizeof(sa));
sin = (struct sockaddr_in*)&sa;
sin->sin_family = AF_INET;
hnputs(&sin->sin_port, rport);
memmove(&sin->sin_addr.s_addr, raddr+IPv4off, IPv4addrlen);
osenter();
r = connect(fd, &sa, sizeof(sa));
osleave();
if(r < 0)
oserror();
}
void
so_getsockname(int fd, uchar *laddr, ushort *lport)
{
socklen_t len;
struct sockaddr sa;
struct sockaddr_in *sin;
len = sizeof(sa);
if(getsockname(fd, &sa, &len) < 0)
oserror();
sin = (struct sockaddr_in*)&sa;
if(sin->sin_family != AF_INET || len != sizeof(*sin))
error(Enotv4);
ipw6(laddr, sin->sin_addr.s_addr);
*lport = nhgets(&sin->sin_port);
}
void
so_listen(int fd)
{
int r;
osenter();
r = listen(fd, 256);
osleave();
if(r < 0)
oserror();
}
int
so_accept(int fd, uchar *raddr, ushort *rport)
{
int nfd;
socklen_t len;
struct sockaddr sa;
struct sockaddr_in *sin;
sin = (struct sockaddr_in*)&sa;
len = sizeof(sa);
osenter();
if(doselect(fd) < 0) {
osleave();
return -1;
}
nfd = accept(fd, &sa, &len);
osleave();
if(nfd < 0)
oserror();
if(sin->sin_family != AF_INET || len != sizeof(*sin))
error(Enotv4);
ipw6(raddr, sin->sin_addr.s_addr);
*rport = nhgets(&sin->sin_port);
return nfd;
}
void
so_bind(int fd, int su, uchar *addr, ushort port)
{
int i, one;
struct sockaddr sa;
struct sockaddr_in *sin;
sin = (struct sockaddr_in*)&sa;
one = 1;
// if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&one, sizeof(one)) < 0) {
// oserrstr(up->genbuf, sizeof(up->genbuf));
// print("setsockopt: %s", err);
// }
if(su) {
for(i = 600; i < 1024; i++) {
memset(&sa, 0, sizeof(sa));
sin->sin_family = AF_INET;
memmove(&sin->sin_addr.s_addr, addr+IPv4off, IPv4addrlen);
hnputs(&sin->sin_port, i);
if(bind(fd, &sa, sizeof(sa)) >= 0)
return;
}
oserror();
}
memset(&sa, 0, sizeof(sa));
sin->sin_family = AF_INET;
memmove(&sin->sin_addr.s_addr, addr+IPv4off, IPv4addrlen);
hnputs(&sin->sin_port, port);
if(bind(fd, &sa, sizeof(sa)) < 0)
oserror();
}
int
so_gethostbyname(char *host, char**hostv, int n)
{
int i;
char buf[32];
uchar *p;
struct hostent *hp;
hp = gethostbyname(host);
if(hp == 0)
return 0;
for(i = 0; hp->h_addr_list[i] && i < n; i++) {
p = (uchar*)hp->h_addr_list[i];
sprint(buf, "%ud.%ud.%ud.%ud", p[0], p[1], p[2], p[3]);
hostv[i] = strdup(buf);
if(hostv[i] == 0)
break;
}
return i;
}
int
so_gethostbyaddr(char *addr, char **hostv, int n)
{
int i;
struct hostent *hp;
unsigned long straddr;
straddr = inet_addr(addr);
if(straddr == -1)
return 0;
hp = gethostbyaddr((char *)&straddr, sizeof(straddr), AF_INET);
if(hp == 0)
return 0;
hostv[0] = strdup(hp->h_name);
if(hostv[0] == 0)
return 0;
for(i = 1; hp->h_aliases[i-1] && i < n; i++) {
hostv[i] = strdup(hp->h_aliases[i-1]);
if(hostv[i] == 0)
break;
}
return i;
}
int
so_getservbyname(char *service, char *net, char *port)
{
ushort p;
struct servent *s;
s = getservbyname(service, net);
if(s == 0)
return -1;
p = s->s_port;
sprint(port, "%d", nhgets(&p));
return 0;
}
int
so_hangup(int fd, int nolinger)
{
int r;
static struct linger l = {1, 0};
osenter();
if(nolinger)
setsockopt(fd, SOL_SOCKET, SO_LINGER, (char*)&l, sizeof(l));
r = closesocket(fd);
osleave();
return r;
}
void
arpadd(char *ipaddr, char *eaddr, int n)
{
error("arp not implemented");
}
int
so_mustbind(int restricted, int port)
{
USED(restricted);
USED(port);
/* Windows requires bound sockets, even on port 0 */
return 1;
}
void
so_keepalive(int fd, int ms)
{
int on;
USED(ms);
on = 1;
setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (char*)&on, sizeof(on));
}