accept4 and accept6

CHANGES

@@ -1,6 +1,8 @@
 0.6:
-  changed name to libowfat
-  fixed fmt_ulong (did not output 0 correctly)
+  changed name to libowfat.
+  fixed fmt_ulong (did not output 0 correctly).
+  added buffer.
+  extended buffer API to include buffer_putulong() and friends.
 
 0.5:
   made subdirectories for the different libraries.

socket.h

@@ -20,8 +20,8 @@ extern int socket_bind4_reuse(int s,const char *ip,uint16 port);
 extern int socket_bind6(int s,const char *ip,uint16 port,uint32 scope_id);
 extern int socket_bind6_reuse(int s,const char *ip,uint16 port,uint32 scope_id);
 extern int socket_listen(int s,unsigned int backlog);
-extern int socket_accept4(int s,char *ip,uint16 *);
-extern int socket_accept6(int s,char *ip,uint16 *,uint32 *scope_id);
+extern int socket_accept4(int s,char *ip,uint16 *port);
+extern int socket_accept6(int s,char *ip,uint16 *port,uint32 *scope_id);
 extern int socket_recv4(int s,char *buf,unsigned int len,char *ip,uint16 *port);
 extern int socket_recv6(int s,char *buf,unsigned int len,char *ip,uint16 *port,uint32 *scope_id);
 extern int socket_send4(int s,const char *buf,unsigned int len,const char *ip,uint16 port);

socket/socket_accept4.c

@@ -0,0 +1,13 @@
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include "socket.h"
+
+int socket_accept4(int s,char *ip,uint16 *port) {
+  struct sockaddr_in si;
+  unsigned int len = sizeof si;
+  int fd;
+  if ((fd=accept(s,(struct sockaddr*) &si,&len))<0) return -1;
+  *(uint32*)ip = *(uint32*)&si.sin_addr;
+  uint16_unpack_big((char *) &si.sin_port,port);
+  return fd;
+}

socket/socket_accept6.c

@@ -0,0 +1,43 @@
+#include <sys/param.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include "byte.h"
+#include "socket.h"
+#include "ip6.h"
+#include "haveip6.h"
+#include "error.h"
+
+int socket_accept6(int s,char ip[16],uint16 *port,uint32 *scope_id)
+{
+#ifdef LIBC_HAS_IP6
+  struct sockaddr_in6 sa;
+#else
+  struct sockaddr_in sa;
+#endif
+  unsigned int dummy = sizeof sa;
+  int fd;
+
+  fd = accept(s,(struct sockaddr *) &sa,&dummy);
+  if (fd == -1) return -1;
+
+#ifdef LIBC_HAS_IP6
+  if (sa.sin6_family==AF_INET) {
+    struct sockaddr_in *sa4=(struct sockaddr_in*)&sa;
+    byte_copy(ip,12,V4mappedprefix);
+    byte_copy(ip+12,4,(char *) &sa4->sin_addr);
+    uint16_unpack_big((char *) &sa4->sin_port,port);
+    return fd;
+  }
+  byte_copy(ip,16,(char *) &sa.sin6_addr);
+  uint16_unpack_big((char *) &sa.sin6_port,port);
+  if (scope_id) *scope_id=sa.sin6_scope_id;
+
+  return fd;
+#else
+  byte_copy(ip,12,V4mappedprefix);
+  byte_copy(ip+12,4,(char *) &sa.sin_addr);
+  uint16_unpack_big((char *) &sa.sin_port,port);
+  if (scope_id) *scope_id=0;
+  return fd;
+#endif
+}