1 files changed, 79 insertions, 0 deletions
diff --git a/src/socket_bind.c b/src/socket_bind.c
new file mode 100644
index 0000000..b942e20
--- /dev/null
+++ b/src/socket_bind.c
@@ -0,0 +1,79 @@
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include "byte.h"
+#include "socket_if.h"
+#include "ip.h"
+
+/**
+	@file socket_bind.c
+	@author djb, fefe, feh
+	@source qmail, djbdns, ucspi-tcp6
+	@brief binding a socket to a local resource
+*/
+
+int socket_bind4(int s,const char ip[4],uint16 port)
+{
+  struct sockaddr_in sa;
+
+  byte_zero(&sa,sizeof(sa));
+  sa.sin_family = AF_INET;
+  uint16_pack_big((char *)&sa.sin_port,port);
+  byte_copy((char *)&sa.sin_addr,4,ip);
+
+  return bind(s,(struct sockaddr *)&sa,sizeof(sa));
+}
+
+int socket_bind4_reuse(int s,const char ip[4],uint16 port)
+{
+  int opt = 1;
+  setsockopt(s,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
+  return socket_bind4(s,ip,port);
+}
+
+/* seems not to be used here -- djbdns requires it */
+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);
+  }
+}
+
+int socket_bind6(int s,const char ip[16],uint16 port,uint32 scope_id)
+{
+  struct sockaddr_in6 sa;
+
+  byte_zero(&sa,sizeof(sa));
+  sa.sin6_family = AF_INET6;
+  uint16_pack_big((char *)&sa.sin6_port,port);
+/*  implicit: sa.sin6_flowinfo = 0; */
+  byte_copy((char *)&sa.sin6_addr,16,ip);
+  sa.sin6_scope_id = scope_id;
+
+  return bind(s,(struct sockaddr *)&sa,sizeof(sa));
+}
+
+int socket_bind6_reuse(int s,const char ip[16],uint16 port,uint32 scope_id)
+{
+  int opt = 1;
+  setsockopt(s,SOL_SOCKET,SO_REUSEADDR,&opt,sizeof(opt));
+  return socket_bind6(s,ip,port,scope_id);
+}
+
+int socket_bind(int s,const char ip[16],uint16 port,uint32 scope_id)
+{
+  if (ip6_isv4mapped(ip)) 
+    return socket_bind4(s,ip + 12,port);
+  
+  return socket_bind6(s,ip,port,scope_id);
+}
+
+int socket_bind_reuse(int s,const char ip[16],uint16 port,uint32 scope_id)
+{
+  if (ip6_isv4mapped(ip)) 
+    return socket_bind4_reuse(s,ip + 12,port);
+
+  return socket_bind6_reuse(s,ip,port,scope_id);
+}