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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Connect to host at port using address resolusion from getaddrinfo
*
*/
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <errno.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include "libbb.h"
int bb_getport(const char *port)
{
int port_nr;
char *endptr;
struct servent *tserv;
if (!port) {
return -1;
}
port_nr=strtol(port, &endptr, 10);
if (errno != 0 || *endptr!='\0' || endptr==port || port_nr < 1 || port_nr > 65536)
{
if (port_nr==0 && (tserv = getservbyname(port, "tcp")) != NULL) {
port_nr = tserv->s_port;
} else {
return -1;
}
} else {
port_nr = htons(port_nr);
}
return port_nr;
}
void bb_lookup_host(struct sockaddr_in *s_in, const char *host, const char *port)
{
struct hostent *he;
memset(s_in, 0, sizeof(struct sockaddr_in));
s_in->sin_family = AF_INET;
he = xgethostbyname(host);
memcpy(&(s_in->sin_addr), he->h_addr_list[0], he->h_length);
if (port) {
s_in->sin_port=bb_getport(port);
}
}
int xconnect(struct sockaddr_in *s_addr)
{
int s = socket(AF_INET, SOCK_STREAM, 0);
if (connect(s, (struct sockaddr_in *)s_addr, sizeof(struct sockaddr_in)) < 0)
{
bb_perror_msg_and_die("Unable to connect to remote host (%s)",
inet_ntoa(s_addr->sin_addr));
}
return s;
}
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