Plan 9 from Bell Labs’s /usr/web/sources/contrib/anothy/src/lib/djb-ape/unix/socket_broadcast.c
#include <sys/types.h> #include <sys/param.h> #include <sys/socket.h> #include <netinet/in.h> #include "socket.h" int socket_broadcast(int s) { int opt = 1; return setsockopt(s,SOL_SOCKET,SO_BROADCAST,&opt,sizeof opt); }