9.850 recvfrom

POSIX specification:
http://www.opengroup.org/onlinepubs/9699919799/functions/recvfrom.html

Gnulib module: recvfrom

Portability problems fixed by Gnulib:

• This function has the return type int instead of ssize_t on some platforms: OSF/1 5.1.
• On Windows platforms (excluding Cygwin), error codes for recvfrom are not placed in errno, and WSAGetLastError must be used instead.

Portability problems not fixed by Gnulib:

• Some platforms don't have a socklen_t type; in this case this function's sixth argument type is ‘int *’.