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#ifndef HAVE_SOCKETS
#error getaddrinfo.c included by mistake! no socket support!
#else
#include <sys/types.h>
#include <sys/socket.h>
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#include "getaddrinfo.h"
void
freeaddrinfo(struct addrinfo *res)
{
if (res->ai_addr != NULL)
free(res->ai_addr);
free(res);
}
int
getaddrinfo(const char *hostname, const char *portname,
struct addrinfo *hints, struct addrinfo **res)
{
struct addrinfo *out;
if (res == NULL)
return -1;
out = (struct addrinfo *) malloc(sizeof(*out));
if (out == NULL) {
*res = NULL;
return -1;
}
memset(out, '\0', sizeof(*out));
out->ai_addr = (struct sockaddr *) malloc(sizeof(struct sockaddr_in));
if (out->ai_addr == NULL) {
free(out);
*res = NULL;
return -1;
}
out->ai_socktype = SOCK_STREAM;
if (hints != NULL) {
if (hints->ai_socktype)
out->ai_socktype = hints->ai_socktype;
if (hints->ai_protocol)
out->ai_protocol = hints->ai_protocol;
}
if (out->ai_protocol == 0) {
switch (out->ai_socktype) {
case SOCK_STREAM:
out->ai_protocol = IPPROTO_TCP;
break;
case SOCK_DGRAM:
out->ai_protocol = IPPROTO_UDP;
break;
case SOCK_RAW:
out->ai_protocol = IPPROTO_RAW;
break;
}
}
out->ai_addrlen = sizeof(struct sockaddr_in);
memset(out->ai_addr, '\0', sizeof(struct sockaddr_in));
if (hostname != NULL) {
struct hostent *he;
he = gethostbyname(hostname);
if (he != NULL && he->h_addr_list != NULL) {
((struct sockaddr_in *)out->ai_addr)->sin_addr.s_addr
= ((struct in_addr *)he->h_addr_list[0])->s_addr;
} else {
freeaddrinfo(out);
return -1;
}
} else {
if (!(out->ai_flags & AI_PASSIVE))
((struct sockaddr_in *)out->ai_addr)->sin_addr.s_addr
= htonl(INADDR_ANY);
}
((struct sockaddr_in *)out->ai_addr)->sin_family = AF_INET;
out->ai_family = AF_INET;
if (portname != NULL && *portname) {
long portnum;
char *end;
portnum = strtol(portname, &end, 10);
if (*end == '\0' && portnum > 0 && portnum < 65536) {
((struct sockaddr_in *)out->ai_addr)->sin_port
= htons(portnum);
} else {
struct servent *se;
se = getservbyname(portname, NULL);
if (se != NULL) {
((struct sockaddr_in *)out->ai_addr)->sin_port
= se->s_port;
}
}
}
*res = out;
return 0;
}
#endif
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