u_long TcpTransport::getInetAddr()

in src/transport/TcpTransport.cpp [94:133]

• 35 lines of code
• 8 McCabe index (conditional complexity)

u_long TcpTransport::getInetAddr(string& hostname) {
  u_long addr = inet_addr(hostname.c_str());

  if (INADDR_NONE == addr) {
    constexpr size_t length = 128;
    struct evutil_addrinfo hints;
    struct evutil_addrinfo* answer = NULL;
    /* Build the hints to tell getaddrinfo how to act. */
    memset(&hints, 0, sizeof(hints));
    hints.ai_family = AF_UNSPEC; /* v4 or v6 is fine. */
    // Look up the hostname.
    int err = evutil_getaddrinfo(hostname.c_str(), NULL, &hints, &answer);
    if (err != 0) {
      string info = "Failed to resolve  host name(" + hostname + "): " + evutil_gai_strerror(err);
      THROW_MQEXCEPTION(MQClientException, info, -1);
    }

    struct evutil_addrinfo* addressInfo;
    for (addressInfo = answer; addressInfo; addressInfo = addressInfo->ai_next) {
      char buf[length];
      const char* address = NULL;
      if (addressInfo->ai_family == AF_INET) {
        struct sockaddr_in* sin = (struct sockaddr_in*)addressInfo->ai_addr;
        address = evutil_inet_ntop(AF_INET, &sin->sin_addr, buf, length);
      } else if (addressInfo->ai_family == AF_INET6) {
        struct sockaddr_in6* sin6 = (struct sockaddr_in6*)addressInfo->ai_addr;
        address = evutil_inet_ntop(AF_INET6, &sin6->sin6_addr, buf, length);
      }
      if (address) {
        addr = inet_addr(address);
        if (addr != INADDR_NONE) {
          break;
        }
      }
    }
    evutil_freeaddrinfo(answer);
  }

  return addr;
}