ref: a5cb451b299b03f44154fac5780b6a57ca130ce0
dir: /emu/port/ipif-posix.c/
#ifdef sun
#define uint uxuint
#define ulong uxulong
#define ushort uxushort
#endif
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <sys/ioctl.h>
#undef ulong
#undef ushort
#undef uint
#include "dat.h"
#include "fns.h"
#include "ip.h"
#include "error.h"
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 = write(sock, va, len);
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;
}
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(hdr == 0)
r = read(sock, va, len);
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)
{
close(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();
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", up->genbuf);
}
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 = shutdown(fd, 2);
if(r >= 0)
r = close(fd);
osleave();
return r;
}
void
arpadd(char *ipaddr, char *eaddr, int n)
{
#ifdef SIOCGARP
struct arpreq a;
struct sockaddr_in pa;
int s;
uchar addr[IPaddrlen];
s = socket(AF_INET, SOCK_DGRAM, 0);
memset(&a, 0, sizeof(a));
memset(&pa, 0, sizeof(pa));
pa.sin_family = AF_INET;
pa.sin_port = 0;
parseip(addr, ipaddr);
if(!isv4(addr)){
close(s);
error(Ebadarg);
}
memmove(&pa.sin_addr, ipaddr+IPv4off, IPv4addrlen);
memmove(&a.arp_pa, &pa, sizeof(pa));
while(ioctl(s, SIOCGARP, &a) != -1) {
ioctl(s, SIOCDARP, &a);
memset(&a.arp_ha, 0, sizeof(a.arp_ha));
}
a.arp_ha.sa_family = AF_UNSPEC;
parsemac((uchar*)a.arp_ha.sa_data, eaddr, 6);
a.arp_flags = ATF_PERM;
if(ioctl(s, SIOCSARP, &a) == -1) {
oserrstr(up->env->errstr, ERRMAX);
close(s);
error(up->env->errstr);
}
close(s);
#else
error("arp not implemented");
#endif
}
int
so_mustbind(int restricted, int port)
{
return restricted || port != 0;
}
void
so_keepalive(int fd, int ms)
{
int on;
on = 1;
setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE, (char*)&on, sizeof(on));
#ifdef TCP_KEEPIDLE
if(ms <= 120000)
ms = 120000;
ms /= 1000;
setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE, (char*)&ms, sizeof(ms));
#endif
}