int Endpoint::set_address(const char* host, const int port) {
reset_address();
// IP Address
char address[5];
char *p_address = address;
// Dot-decimal notation
int result = std::sscanf(host, "%3u.%3u.%3u.%3u",
(unsigned int*)&address[0], (unsigned int*)&address[1],
(unsigned int*)&address[2], (unsigned int*)&address[3]);
if (result != 4) {
// Resolve address with DNS
struct hostent *host_address = lwip_gethostbyname(host);
if (host_address == NULL)
return -1; //Could not resolve address
p_address = (char*)host_address->h_addr_list[0];
}
std::memcpy((char*)&_remoteHost.sin_addr.s_addr, p_address, 4);
// Address family
_remoteHost.sin_family = AF_INET;
// Set port
_remoteHost.sin_port = htons(port);
return 0;
}
int dns(const char * name, struct ip_addr * res)
{
int i;
int c;
unsigned char *ip = (unsigned char *)&res->addr;
i = 0;
c = 0;
res->addr = 0;
while(name[c] != 0) {
if (name[c] != '.') {
if (!isdigit(name[c]))
goto dns;
ip[i] *= 10;
ip[i] += name[c] - '0';
}
else {
if (name[c+1] == '.')
goto dns;
i++;
}
if (i >= 5)
goto dns;
c++;
}
//res->addr = ntohl(res->addr);
return 0;
dns:
if (dnssrv.sin_port) {
if (lwip_gethostbyname(&dnssrv, name, &res->addr) < 0) {
printf("gethostbyname: Can't look up name");
return -1;
} else {
return 0;
}
} else
return -1;
}
int main(int argc, char **argv) {
uint8 ip[4];
struct sockaddr_in dnssrv;
// KOS code
net_init();
lwip_kos_init();
// Do the query
dnssrv.sin_family = AF_INET;
dnssrv.sin_port = htons(53);
dnssrv.sin_addr.s_addr = htonl(0x0a030202);
if (lwip_gethostbyname(&dnssrv, "www.allusion.net", ip) < 0)
perror("Can't look up name");
else {
printf("www.allusion.net is %d.%d.%d.%d\n",
ip[0], ip[1], ip[2], ip[3]);
}
return 0;
}
T_uezError Network_lwIP_ResolveAddress(
void *aWorkspace,
const char *aName,
T_uezNetworkAddr *aAddr)
{
#if LWIP_DNS
struct hostent* hp;
T_Network_lwIP_Workspace *p = (T_Network_lwIP_Workspace *)aWorkspace;
T_uezError error = UEZ_ERROR_NONE;
UEZSemaphoreGrab(p->iSem, UEZ_TIMEOUT_INFINITE);
hp = (struct hostent*)lwip_gethostbyname(aName);
if (hp->h_length == 4)
memcpy(aAddr->v4, (char *)hp->h_addr, hp->h_length);
else
error = UEZ_ERROR_MISMATCH;
UEZSemaphoreRelease(p->iSem);
return error;
#else
return UEZ_ERROR_NOT_AVAILABLE;
#endif
}
struct hostent *gethostbyname(const char *name)
{
return lwip_gethostbyname(name);
}
