How to convert string to IP address and vice versa

Question

how can I convert a string ipAddress (struct in_addr) and vice versa? and how do I turn in unsigned long ipAddress? thanks

Answer 1

The third inet_pton parameter is a pointer to an in_addr structure. After a successful inet_pton call, the in_addr structure will be populated with the address information. The structure's S_addr field contains the IP address in network byte order (reverse order).

Example : 

#include 
uint32_t NodeIpAddress::getIPv4AddressInteger(std::string IPv4Address) {
    int result;
    uint32_t IPv4Identifier = 0;
    struct in_addr addr;
    // store this IP address in sa:
    result = inet_pton(AF_INET, IPv4Address.c_str(), &(addr));
    if (result == -1) {         
gpLogFile->Write(LOGPREFIX, LogFile::LOGLEVEL_ERROR, _T("Failed to convert IP %hs to IPv4 Address. Due to invalid family of %d. WSA Error of %d"), IPv4Address.c_str(), AF_INET, result);
    }
    else if (result == 0) {
        gpLogFile->Write(LOGPREFIX, LogFile::LOGLEVEL_ERROR, _T("Failed to convert IP %hs to IPv4"), IPv4Address.c_str());
    }
    else {
        IPv4Identifier = ntohl(*((uint32_t *)&(addr)));
    }
    return IPv4Identifier;
}