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#include <u.h>
#include <libc.h>
#undef accept
#undef announce
#undef dial
#undef setnetmtpt
#undef hangup
#undef listen
#undef netmkaddr
#undef reject
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <sys/un.h>
#include <netdb.h>
#undef unix
#define unix xunix
int
p9dial(char *addr, char *local, char *dummy2, int *dummy3)
{
char *buf;
char *net, *unix;
u32int host;
int port;
int proto;
socklen_t sn;
int n;
struct sockaddr_in sa, sal;
struct sockaddr_un su;
int s;
if(dummy2 || dummy3){
werrstr("cannot handle extra arguments in dial");
return -1;
}
buf = strdup(addr);
if(buf == nil)
return -1;
if(p9dialparse(buf, &net, &unix, &host, &port) < 0){
free(buf);
return -1;
}
if(strcmp(net, "unix") != 0 && host == 0){
werrstr("invalid dial address 0.0.0.0 (aka *)");
free(buf);
return -1;
}
if(strcmp(net, "tcp") == 0)
proto = SOCK_STREAM;
else if(strcmp(net, "udp") == 0)
proto = SOCK_DGRAM;
else if(strcmp(net, "unix") == 0)
goto Unix;
else{
werrstr("can only handle tcp, udp, and unix: not %s", net);
free(buf);
return -1;
}
free(buf);
if((s = socket(AF_INET, proto, 0)) < 0)
return -1;
if(local){
buf = strdup(local);
if(buf == nil){
close(s);
return -1;
}
if(p9dialparse(buf, &net, &unix, &host, &port) < 0){
badlocal:
free(buf);
close(s);
return -1;
}
if(unix){
werrstr("bad local address %s for dial %s", local, addr);
goto badlocal;
}
memset(&sal, 0, sizeof sal);
memmove(&sal.sin_addr, &local, 4);
sal.sin_family = AF_INET;
sal.sin_port = htons(port);
sn = sizeof n;
if(port && getsockopt(s, SOL_SOCKET, SO_TYPE, (void*)&n, &sn) >= 0
&& n == SOCK_STREAM){
n = 1;
setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char*)&n, sizeof n);
}
if(bind(s, (struct sockaddr*)&sal, sizeof sal) < 0)
goto badlocal;
free(buf);
}
n = 1;
setsockopt(s, SOL_SOCKET, SO_BROADCAST, &n, sizeof n);
if(host != 0){
memset(&sa, 0, sizeof sa);
memmove(&sa.sin_addr, &host, 4);
sa.sin_family = AF_INET;
sa.sin_port = htons(port);
if(connect(s, (struct sockaddr*)&sa, sizeof sa) < 0){
close(s);
return -1;
}
}
if(proto == SOCK_STREAM){
int one = 1;
setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (char*)&one, sizeof one);
}
return s;
Unix:
if(local){
werrstr("local address not supported on unix network");
free(buf);
return -1;
}
/* Allow regular files in addition to Unix sockets. */
if((s = open(unix, ORDWR)) >= 0)
return s;
memset(&su, 0, sizeof su);
su.sun_family = AF_UNIX;
if(strlen(unix)+1 > sizeof su.sun_path){
werrstr("unix socket name too long");
free(buf);
return -1;
}
strcpy(su.sun_path, unix);
free(buf);
if((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0){
werrstr("socket: %r");
return -1;
}
if(connect(s, (struct sockaddr*)&su, sizeof su) < 0){
werrstr("connect %s: %r", su.sun_path);
close(s);
return -1;
}
return s;
}
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