xref: /plan9/sys/src/ape/lib/bsd/_sock_ingetaddr.c (revision 9b7bf7df4595c26f1e9b67beb0c6e44c9876fb05)
1 /* posix */
2 #include <sys/types.h>
3 #include <unistd.h>
4 #include <stdlib.h>
5 #include <stdio.h>
6 #include <fcntl.h>
7 #include <errno.h>
8 #include <string.h>
9 
10 /* bsd extensions */
11 #include <sys/uio.h>
12 #include <sys/socket.h>
13 #include <netinet/in.h>
14 #include <sys/un.h>
15 
16 #include "priv.h"
17 
18 void
_sock_ingetaddr(Rock * r,struct sockaddr_in * ip,int * alen,char * a)19 _sock_ingetaddr(Rock *r, struct sockaddr_in *ip, int *alen, char *a)
20 {
21 	int n, fd;
22 	char *p;
23 	char name[Ctlsize];
24 
25 	/* get remote address */
26 	strcpy(name, r->ctl);
27 	p = strrchr(name, '/');
28 	strcpy(p+1, a);
29 	fd = open(name, O_RDONLY);
30 	if(fd >= 0){
31 		n = read(fd, name, sizeof(name)-1);
32 		if(n > 0){
33 			name[n] = 0;
34 			p = strchr(name, '!');
35 			if(p){
36 				*p++ = 0;
37 				ip->sin_family = AF_INET;
38 				ip->sin_port = htons(atoi(p));
39 				ip->sin_addr.s_addr = inet_addr(name);
40 				if(alen)
41 					*alen = sizeof(struct sockaddr_in);
42 			}
43 		}
44 		close(fd);
45 	}
46 
47 }
48