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#include "socket.h"
#include "hostip.h"
#include <util/system/defaults.h>
#include <util/system/byteorder.h>
#if defined(_unix_) || defined(_cygwin_)
#include <netdb.h>
#endif
#if !defined(BIND_LIB)
#if !defined(__FreeBSD__) && !defined(_win32_) && !defined(_cygwin_)
#define AGENT_USE_GETADDRINFO
#endif
#if defined(__FreeBSD__)
#define AGENT_USE_GETADDRINFO
#endif
#endif
int NResolver::GetHostIP(const char* hostname, ui32* ip, size_t* slots) {
size_t i = 0;
size_t ipsFound = 0;
#ifdef AGENT_USE_GETADDRINFO
int ret = 0;
struct addrinfo hints;
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
struct addrinfo* gai_res = nullptr;
int gai_ret = getaddrinfo(hostname, nullptr, &hints, &gai_res);
if (gai_ret == 0 && gai_res->ai_addr) {
struct addrinfo* cur = gai_res;
for (i = 0; i < *slots && cur; i++, cur = cur->ai_next, ipsFound++) {
ip[i] = *(ui32*)(&((sockaddr_in*)(cur->ai_addr))->sin_addr);
}
} else {
if (gai_ret == EAI_NONAME || gai_ret == EAI_SERVICE) {
ret = HOST_NOT_FOUND;
} else {
ret = GetDnsError();
}
}
if (gai_res) {
freeaddrinfo(gai_res);
}
if (ret) {
return ret;
}
#else
hostent* hostent = gethostbyname(hostname);
if (!hostent)
return GetDnsError();
if (hostent->h_addrtype != AF_INET || (unsigned)hostent->h_length < sizeof(ui32))
return HOST_NOT_FOUND;
char** cur = hostent->h_addr_list;
for (i = 0; i < *slots && *cur; i++, cur++, ipsFound++)
ip[i] = *(ui32*)*cur;
#endif
for (i = 0; i < ipsFound; i++) {
ip[i] = InetToHost(ip[i]);
}
*slots = ipsFound;
return 0;
}
int NResolver::GetDnsError() {
return h_errno;
}
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