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/*
* (C)opyright MMIV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
* See LICENSE file for license details.
*/
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/un.h>
#include <unistd.h>
#include "ixp.h"
static int
connect_unix_sock(char *address)
{
int fd = 0;
struct sockaddr_un addr = { 0 };
socklen_t su_len;
/* init */
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, address, sizeof(addr.sun_path));
su_len = sizeof(struct sockaddr) + strlen(addr.sun_path);
if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
return -1;
if(connect(fd, (struct sockaddr *) &addr, su_len)) {
close(fd);
return -1;
}
return fd;
}
static int
connect_inet_sock(char *host)
{
int fd = 0;
struct sockaddr_in addr = { 0 };
struct hostent *hp;
char *port = strrchr(host, '!');
const char *errstr = nil;
unsigned int prt;
if(!port)
return -1;
*port = 0;
port++;
prt = cext_strtonum(port, 0, 65535, &errstr);
if(errstr)
return -1;
/* init */
if((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
return -1;
hp = gethostbyname(host);
addr.sin_family = AF_INET;
addr.sin_port = htons(prt);
bcopy(hp->h_addr, &addr.sin_addr, hp->h_length);
if(connect(fd, (struct sockaddr *) &addr, sizeof(struct sockaddr_in))) {
close(fd);
return -1;
}
return fd;
}
int
ixp_connect_sock(char *address)
{
char *p = strchr(address, '!');
char *addr, *type;
if(!p)
return -1;
*p = 0;
addr = &p[1];
type = address; /* unix, inet */
if(!strncmp(type, "unix", 5))
return connect_unix_sock(addr);
else if(!strncmp(type, "tcp", 4))
return connect_inet_sock(addr);
return -1;
}
int
ixp_accept_sock(int fd)
{
socklen_t su_len;
struct sockaddr_un addr = { 0 };
su_len = sizeof(struct sockaddr);
return accept(fd, (struct sockaddr *) &addr, &su_len);
}
static int
create_inet_sock(char *host, char **errstr)
{
int fd;
struct sockaddr_in addr = { 0 };
struct hostent *hp;
char *port = strrchr(host, '!');
unsigned int prt;
if(!port) {
*errstr = "no port provided in address";
return -1;
}
*port = 0;
port++;
prt = cext_strtonum(port, 1024, 65535, (const char **)errstr);
if(*errstr)
return -1;
signal(SIGPIPE, SIG_IGN);
if((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
*errstr = "cannot open socket";
return -1;
}
addr.sin_family = AF_INET;
addr.sin_port = htons(prt);
if(!strncmp(host, "*", 2))
addr.sin_addr.s_addr = htonl(INADDR_ANY);
else if((hp = gethostbyname(host)))
bcopy(hp->h_addr, &addr.sin_addr, hp->h_length);
else {
*errstr = "cannot translate hostname to an address";
return -1;
}
if(bind(fd, (struct sockaddr *) &addr, sizeof(struct sockaddr_in)) < 0) {
*errstr = "cannot bind socket";
close(fd);
return -1;
}
if(listen(fd, IXP_MAX_CACHE) < 0) {
*errstr = "cannot listen on socket";
close(fd);
return -1;
}
return fd;
}
static int
create_unix_sock(char *file, char **errstr)
{
int fd;
int yes = 1;
struct sockaddr_un addr = { 0 };
socklen_t su_len;
signal(SIGPIPE, SIG_IGN);
if((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
*errstr = "cannot open socket";
return -1;
}
if(setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
(char *) &yes, sizeof(yes)) < 0) {
*errstr = "cannot set socket options";
close(fd);
return -1;
}
addr.sun_family = AF_UNIX;
strncpy(addr.sun_path, file, sizeof(addr.sun_path));
su_len = sizeof(struct sockaddr) + strlen(addr.sun_path);
unlink(file); /* remove old socket, if any */
if(bind(fd, (struct sockaddr *) &addr, su_len) < 0) {
*errstr = "cannot bind socket";
close(fd);
return -1;
}
chmod(file, S_IRWXU);
if(listen(fd, IXP_MAX_CACHE) < 0) {
*errstr = "cannot listen on socket";
close(fd);
return -1;
}
return fd;
}
int
ixp_create_sock(char *address, char **errstr)
{
char *p = strchr(address, '!');
char *addr, *type;
if(!p) {
*errstr = "no socket type defined";
return -1;
}
*p = 0;
addr = &p[1];
type = address; /* unix, inet */
if(!strncmp(type, "unix", 5))
return create_unix_sock(addr, errstr);
else if(!strncmp(type, "tcp", 4))
return create_inet_sock(addr, errstr);
else
*errstr = "unkown socket type";
return -1;
}
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