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diff --git a/socket.h b/socket.h
index a32a3422..9d9406d9 100644
--- a/socket.h
+++ b/socket.h
@@ -1,5 +1,5 @@
-/*
- * socket.h -- declarations for socket library functions
+/**
+ * \file socket.h -- declarations for socket library functions
  *
  * For license terms, see the file COPYING in this directory.
  */
@@ -10,24 +10,13 @@
 struct addrinfo;
 
 #include <config.h>
-#ifdef HAVE_SYS_SOCKET_H
 #include <sys/socket.h>
-#elif HAVE_NET_SOCKET_H
-#include <net/socket.h>
-#endif
 #include <netdb.h>
 
-/* Create a new client socket; returns -1 on error */
+/** Create a new client socket; returns -1 on error */
 int SockOpen(const char *host, const char *service, const char *plugin, struct addrinfo **);
 
-/* Returns 1 if this socket is OK, 0 if it isn't select()able
- * on - probably because it's been closed. You should
- * always check this function before passing stuff to the
- * select()-based waiter, as otherwise it may loop. 
- */
-int SockCheckOpen(int fd);
-
-/* 
+/** 
 Get a string terminated by an '\n' (matches interface of fgets).
 Pass it a valid socket, a buffer for the string, and
 the length of the buffer (including the trailing \0)
@@ -35,47 +24,43 @@ returns length of buffer on success, -1 on failure.
 */
 int SockRead(int sock, char *buf, int len);
 
-/*
+/**
  * Peek at the next socket character without actually reading it.
  */
 int SockPeek(int sock);
 
-/*
+/**
 Write a chunk of bytes to the socket (matches interface of fwrite).
 Returns number of bytes successfully written.
 */
-int SockWrite(int sock, char *buf, int size);
+int SockWrite(int sock, const char *buf, int size);
 
 /* from /usr/include/sys/cdefs.h */
-#if !defined __GNUC__ || __GNUC__ < 2
+#if !defined __GNUC__
 # define __attribute__(xyz)    /* Ignore. */
 #endif
 
-/* 
+/**
 Send formatted output to the socket (matches interface of fprintf).
 Returns number of bytes successfully written.
 */
-#if defined(HAVE_STDARG_H)
 int SockPrintf(int sock, const char *format, ...)
     __attribute__ ((format (printf, 2, 3)))
     ;
-#else
-int SockPrintf();
-#endif
  
-/*
+/**
 Close a socket previously opened by SockOpen.  This allows for some
 additional clean-up if necessary.
 */
 int SockClose(int sock);
 
-/*
-FIXME: document this
+/**
+ \todo document this
 */
 int UnixOpen(const char *path);
 
 #ifdef SSL_ENABLE
-int SSLOpen(int sock, char *mycert, char *mykey, char *myproto, int certck, char *certpath,
+int SSLOpen(int sock, char *mycert, char *mykey, const char *myproto, int certck, char *cacertfile, char *cacertpath,
     char *fingerprint, char *servercname, char *label, char **remotename);
 #endif /* SSL_ENABLE */