1 #include <u.h>
2 #include <libc.h>
3 
4 #undef	accept
5 #undef	announce
6 #undef	dial
7 #undef	setnetmtpt
8 #undef	hangup
9 #undef	listen
10 #undef	netmkaddr
11 #undef	reject
12 
13 #include <sys/socket.h>
14 #include <netinet/in.h>
15 #include <netinet/tcp.h>
16 #include <sys/un.h>
17 #include <netdb.h>
18 
19 
20 extern int _p9dialparse(char*, char**, char**, u32int*, int*);
21 #undef unix
22 
23 int
24 p9dial(char *addr, char *dummy1, char *dummy2, int *dummy3)
25 {
26 	char *buf;
27 	char *net, *unix;
28 	u32int host;
29 	int port;
30 	int proto;
31 	struct sockaddr_in sa;	
32 	struct sockaddr_un su;
33 	int s;
34 
35 	if(dummy1 || dummy2 || dummy3){
36 		werrstr("cannot handle extra arguments in dial");
37 		return -1;
38 	}
39 
40 	buf = strdup(addr);
41 	if(buf == nil)
42 		return -1;
43 
44 	if(_p9dialparse(buf, &net, &unix, &host, &port) < 0){
45 		free(buf);
46 		return -1;
47 	}
48 
49 	if(strcmp(net, "tcp") == 0)
50 		proto = SOCK_STREAM;
51 	else if(strcmp(net, "udp") == 0)
52 		proto = SOCK_DGRAM;
53 	else if(strcmp(net, "unix") == 0)
54 		goto Unix;
55 	else{
56 		werrstr("can only handle tcp, udp, and unix: not %s", net);
57 		free(buf);
58 		return -1;
59 	}
60 	free(buf);
61 
62 	memset(&sa, 0, sizeof sa);
63 	memmove(&sa.sin_addr, &host, 4);
64 	sa.sin_family = AF_INET;
65 	sa.sin_port = htons(port);
66 	if((s = socket(AF_INET, proto, 0)) < 0)
67 		return -1;
68 	if(connect(s, (struct sockaddr*)&sa, sizeof sa) < 0){
69 		close(s);
70 		return -1;
71 	}
72 	if(proto == SOCK_STREAM){
73 		int one = 1;
74 		setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (char*)&one, sizeof one);
75 	}
76 	return s;
77 
78 Unix:
79 	memset(&su, 0, sizeof su);
80 	su.sun_family = AF_UNIX;
81 	if(strlen(unix)+1 > sizeof su.sun_path){
82 		werrstr("unix socket name too long");
83 		free(buf);
84 		return -1;
85 	}
86 	strcpy(su.sun_path, unix);
87 	free(buf);
88 	if((s = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
89 		return -1;
90 	if(connect(s, (struct sockaddr*)&su, sizeof su) < 0){
91 		close(s);
92 		return -1;
93 	}
94 	return s;
95 }
96