On Thu, 2016-07-28 at 10:14 +0200, Koenraad Lelong wrote: > When I enter 192.168.185.297 (i.e. not a valid ipv4 address) in > IPAddressStr I get > 192.168.185.41 > not the expected error-message. > > According to the rtl-manual : > > function StrToHostAddr(IP: AnsiString) : in_addr > Description: StrToHostAddr converts the string representation in IP to a > host address and returns the host > address. > Errors: On error, the host address is filled with zeroes. > > I would think that converting those zeroes to a host-address would yield > 0.0.0.0. > > Am I missing something ? > Is there a better way, without using some other network-library ?
The in_addr IP address type is a packed record of byte, so if an IP address part larger than 255 is encountered in a string it will be truncated when copied to the byte record using StrToHostAddr. This probably means you have to use some other means of detecting an invalid address, or add a check for (tmpAddress <> IPAddressStr) to cater for your situation. _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
