ref: 75c92428225428c8fde2d015f010e608a0b12f1d
dir: /emu/Nt/ipif6.c/
#define Unknown win_Unknown
/* vista (0x0600) was the first to support IPPROTO_IPV6 */
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0600
#include <winsock2.h>
#include <ws2def.h>
#include <ws2tcpip.h>
#include <wspiapi.h>
#undef Unknown
#include "dat.h"
#include "fns.h"
#include "ip.h"
#include "error.h"
extern int SOCK_SELECT;
int
so_socket(int type)
{
int fd, one;
int v6only;
switch(type) {
default:
error("bad protocol type");
case S_TCP:
type = SOCK_STREAM;
break;
case S_UDP:
type = SOCK_DGRAM;
break;
}
fd = socket(AF_INET6, type, 0);
if(fd < 0)
oserror();
/* OpenBSD has v6only fixed to 1, so the following will fail */
v6only = 0;
if(setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, (void*)&v6only, sizeof v6only) < 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_storage sa;
struct sockaddr_in6 *sin6;
char *h = hdr;
osenter();
if(hdr == 0)
r = send(sock, va, len, 0);
else {
memset(&sa, 0, sizeof(sa));
sin6 = (struct sockaddr_in6*)&sa;
sin6->sin6_family = AF_INET6;
switch(hdrlen){
case OUdphdrlenv4:
v4tov6((uchar*)&sin6->sin6_addr, h);
memmove(&sin6->sin6_port, h+8, 2);
break;
case OUdphdrlen:
memmove((uchar*)&sin6->sin6_addr, h, IPaddrlen);
memmove(&sin6->sin6_port, h+2*IPaddrlen, 2); /* rport */
break;
default:
memmove((uchar*)&sin6->sin6_addr, h, IPaddrlen);
memmove(&sin6->sin6_port, h+3*IPaddrlen, 2);
break;
}
r = sendto(sock, va, len, 0, (struct sockaddr*)sin6, sizeof(*sin6));
}
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, l;
struct sockaddr_storage sa;
struct sockaddr_in6 *sin6;
char h[Udphdrlen];
osenter();
if(doselect(sock) < 0) {
osleave();
return -1;
}
if(hdr == 0)
r = recv(sock, va, len, 0);
else {
sin6 = (struct sockaddr_in6*)&sa;
l = sizeof(sa);
r = recvfrom(sock, va, len, 0, (struct sockaddr*)&sa, &l);
if(r >= 0) {
memset(h, 0, sizeof h);
switch(hdrlen){
case OUdphdrlenv4:
if(v6tov4(h, (uchar*)&sin6->sin6_addr) < 0) {
osleave();
error("OUdphdrlenv4 with IPv6 address");
}
memmove(h+2*IPv4addrlen, &sin6->sin6_port, 2);
break;
case OUdphdrlen:
memmove(h, (uchar*)&sin6->sin6_addr, IPaddrlen);
memmove(h+2*IPaddrlen, &sin6->sin6_port, 2);
break;
default:
memmove(h, (uchar*)&sin6->sin6_addr, IPaddrlen);
memmove(h+3*IPaddrlen, &sin6->sin6_port, 2);
break;
}
/* alas there's no way to get the local addr/port correctly. Pretend. */
memset(&sa, 0, sizeof sa);
l = sizeof(sa);
getsockname(sock, (struct sockaddr*)&sa, &l);
switch(hdrlen){
case OUdphdrlenv4:
/*
* we get v6Unspecified/noaddr if local address cannot be determined.
* that's reasonable for ipv4 too.
*/
if(ipcmp(v6Unspecified, (uchar*)&sin6->sin6_addr) != 0
&& v6tov4(h+IPv4addrlen, (uchar*)&sin6->sin6_addr) < 0) {
osleave();
error("OUdphdrlenv4 with IPv6 address");
}
memmove(h+2*IPv4addrlen+2, &sin6->sin6_port, 2);
break;
case OUdphdrlen:
memmove(h+IPaddrlen, (uchar*)&sin6->sin6_addr, IPaddrlen);
memmove(h+2*IPaddrlen+2, &sin6->sin6_port, 2);
break;
default:
memmove(h+IPaddrlen, (uchar*)&sin6->sin6_addr, IPaddrlen);
memmove(h+2*IPaddrlen, (uchar*)&sin6->sin6_addr, IPaddrlen); /* ifcaddr */
memmove(h+3*IPaddrlen+2, &sin6->sin6_port, 2);
break;
}
memmove(hdr, h, hdrlen);
}
}
osleave();
return r;
}
void
so_close(int sock)
{
closesocket(sock);
}
void
so_connect(int fd, unsigned char *raddr, unsigned short rport)
{
int r;
struct sockaddr_storage sa;
struct sockaddr_in6 *sin6;
memset(&sa, 0, sizeof(sa));
sin6 = (struct sockaddr_in6*)&sa;
sin6->sin6_family = AF_INET6;
hnputs(&sin6->sin6_port, rport);
memmove((uchar*)&sin6->sin6_addr, raddr, IPaddrlen);
osenter();
r = connect(fd, (struct sockaddr*)sin6, sizeof(*sin6));
osleave();
if(r < 0)
oserror();
}
void
so_getsockname(int fd, unsigned char *laddr, unsigned short *lport)
{
int len;
struct sockaddr_storage sa;
struct sockaddr_in6 *sin6;
len = sizeof(*sin6);
if(getsockname(fd, (struct sockaddr*)&sa, &len) < 0)
oserror();
sin6 = (struct sockaddr_in6*)&sa;
if(sin6->sin6_family != AF_INET6 || len != sizeof(*sin6))
error("not AF_INET6");
memmove(laddr, &sin6->sin6_addr, IPaddrlen);
*lport = nhgets(&sin6->sin6_port);
}
void
so_listen(int fd)
{
int r;
osenter();
r = listen(fd, 256);
osleave();
if(r < 0)
oserror();
}
int
so_accept(int fd, unsigned char *raddr, unsigned short *rport)
{
int nfd, len;
struct sockaddr_storage sa;
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6*)&sa;
len = sizeof(*sin6);
osenter();
if(doselect(fd) < 0) {
osleave();
return -1;
}
nfd = accept(fd, (struct sockaddr*)&sa, &len);
osleave();
if(nfd < 0)
oserror();
if(sin6->sin6_family != AF_INET6 || len != sizeof(*sin6))
error("not AF_INET6");
memmove(raddr, &sin6->sin6_addr, IPaddrlen);
*rport = nhgets(&sin6->sin6_port);
return nfd;
}
void
so_bind(int fd, int su, unsigned char *addr, unsigned short port)
{
int i, one;
struct sockaddr_storage sa;
struct sockaddr_in6 *sin6;
sin6 = (struct sockaddr_in6*)&sa;
one = 1;
if(0 && setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&one, sizeof(one)) < 0) {
oserrstr(up->genbuf, sizeof(up->genbuf));
print("setsockopt: %s", up->genbuf);
}
if(su) {
for(i = 600; i < 1024; i++) {
memset(&sa, 0, sizeof(sa));
sin6->sin6_family = AF_INET6;
memmove(&sin6->sin6_addr, addr, IPaddrlen);
hnputs(&sin6->sin6_port, i);
if(bind(fd, (struct sockaddr*)sin6, sizeof(*sin6)) >= 0)
return;
}
oserror();
}
memset(&sa, 0, sizeof(sa));
sin6->sin6_family = AF_INET6;
memmove(&sin6->sin6_addr, addr, IPaddrlen);
hnputs(&sin6->sin6_port, port);
if(bind(fd, (struct sockaddr*)sin6, sizeof(*sin6)) < 0)
oserror();
}
static int
resolve(char *name, char **hostv, int n, int isnumeric)
{
int i;
struct addrinfo *res0, *r;
char buf[5*8];
uchar addr[IPaddrlen];
struct addrinfo hints;
memset(&hints, 0, sizeof hints);
hints.ai_flags = isnumeric ? AI_NUMERICHOST : 0;
hints.ai_family = PF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if(getaddrinfo(name, nil, &hints, &res0) < 0)
return 0;
i = 0;
for(r = res0; r != nil && i < n; r = r->ai_next) {
if(r->ai_family == AF_INET)
v4tov6(addr, (uchar*)&((struct sockaddr_in*)r->ai_addr)->sin_addr);
else if(r->ai_family == AF_INET6)
memmove(addr, &((struct sockaddr_in6*)r->ai_addr)->sin6_addr, IPaddrlen);
else
continue;
snprint(buf, sizeof buf, "%I", addr);
hostv[i++] = strdup(buf);
}
freeaddrinfo(res0);
return i;
}
int
so_gethostbyname(char *host, char **hostv, int n)
{
return resolve(host, hostv, n, 0);
}
int
so_gethostbyaddr(char *addr, char **hostv, int n)
{
return resolve(addr, hostv, n, 1);
}
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));
}