initial commit, resurrect one of my realy old projects

1 files changed, 33 insertions, 0 deletions

diff --git a/socket_bind.c b/socket_bind.c
new file mode 100644
index 0000000..5a6a0a0
--- /dev/null
+++ b/socket_bind.c
@@ -0,0 +1,33 @@
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include "socket.h"
+#include "uint16.h"
+
+int socket_bind4(int s,char ip[4],u16 port)
+{
+	struct sockaddr_in sa;
+	
+	memset(&sa,0,sizeof sa);
+	sa.sin_family = AF_INET;
+	u16_pack_big((char *) &sa.sin_port,port);
+	memcpy((char *) &sa.sin_addr,ip,4);
+
+	return bind(s,(struct sockaddr *) &sa,sizeof sa);
+}
+
+int socket_bind4_reuse(int s,char ip[4],u16 port)
+{
+	int opt = 1;
+	setsockopt(s,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof opt);
+	return socket_bind4(s,ip,port);
+}
+
+void socket_tryreservein(int s,int size)
+{
+	while (size >= 1024) {
+		if (setsockopt(s,SOL_SOCKET,SO_RCVBUF,&size,sizeof size) == 0) return;
+		size -= (size >> 5);
+	}
+}