X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/cbe2d68fd7c7c7bac692b3a2d200a5d2429ab201..a607fe54c9f20934b57e29e9040b9dd0a4decf3a:/network.h

diff --git a/network.h b/network.h
index ad45547d..49ebd39c 100644
--- a/network.h
+++ b/network.h
@@ -15,7 +15,7 @@
 
 #ifndef DONE_TYPEDEFS
 #define DONE_TYPEDEFS
-typedef struct config_tag Config;
+typedef struct conf_tag Conf;
 typedef struct backend_tag Backend;
 typedef struct terminal_tag Terminal;
 #endif
@@ -25,6 +25,10 @@ typedef struct SockAddr_tag *SockAddr;
 typedef struct socket_function_table **Socket;
 typedef struct plug_function_table **Plug;
 
+#ifndef OSSOCKET_DEFINED
+typedef void *OSSocket;
+#endif
+
 struct socket_function_table {
     Plug(*plug) (Socket s, Plug p);
     /* use a different plug (return the old one) */
@@ -33,6 +37,7 @@ struct socket_function_table {
     void (*close) (Socket s);
     int (*write) (Socket s, const char *data, int len);
     int (*write_oob) (Socket s, const char *data, int len);
+    void (*write_eof) (Socket s);
     void (*flush) (Socket s);
     void (*set_private_ptr) (Socket s, void *ptr);
     void *(*get_private_ptr) (Socket s);
@@ -42,6 +47,20 @@ struct socket_function_table {
 };
 
 struct plug_function_table {
+    void (*log)(Plug p, int type, SockAddr addr, int port,
+		const char *error_msg, int error_code);
+    /*
+     * Passes the client progress reports on the process of setting
+     * up the connection.
+     * 
+     * 	- type==0 means we are about to try to connect to address
+     * 	  `addr' (error_msg and error_code are ignored)
+     * 	- type==1 means we have failed to connect to address `addr'
+     * 	  (error_msg and error_code are supplied). This is not a
+     * 	  fatal error - we may well have other candidate addresses
+     * 	  to fall back to. When it _is_ fatal, the closing()
+     * 	  function will be called.
+     */
     int (*closing)
      (Plug p, const char *error_msg, int error_code, int calling_back);
     /* error_msg is NULL iff it is not an error (ie it closed normally) */
@@ -64,51 +83,70 @@ struct plug_function_table {
      * on a socket is cleared or partially cleared. The new backlog
      * size is passed in the `bufsize' parameter.
      */
-    int (*accepting)(Plug p, void *sock);
+    int (*accepting)(Plug p, OSSocket sock);
     /*
      * returns 0 if the host at address addr is a valid host for connecting or error
      */
 };
 
 /* proxy indirection layer */
+/* NB, control of 'addr' is passed via new_connection, which takes
+ * responsibility for freeing it */
 Socket new_connection(SockAddr addr, char *hostname,
 		      int port, int privport,
-		      int oobinline, int nodelay, Plug plug,
-		      const Config *cfg);
+		      int oobinline, int nodelay, int keepalive,
+		      Plug plug, Conf *conf);
 Socket new_listener(char *srcaddr, int port, Plug plug, int local_host_only,
-		    const Config *cfg);
+		    Conf *conf, int addressfamily);
 SockAddr name_lookup(char *host, int port, char **canonicalname,
-		     const Config *cfg);
+		     Conf *conf, int addressfamily);
+
+/* platform-dependent callback from new_connection() */
+/* (same caveat about addr as new_connection()) */
+Socket platform_new_connection(SockAddr addr, char *hostname,
+			       int port, int privport,
+			       int oobinline, int nodelay, int keepalive,
+			       Plug plug, Conf *conf);
 
 /* socket functions */
 
 void sk_init(void);		       /* called once at program startup */
 void sk_cleanup(void);		       /* called just before program exit */
 
-SockAddr sk_namelookup(const char *host, char **canonicalname);
+SockAddr sk_namelookup(const char *host, char **canonicalname, int address_family);
 SockAddr sk_nonamelookup(const char *host);
 void sk_getaddr(SockAddr addr, char *buf, int buflen);
 int sk_hostname_is_local(char *name);
 int sk_address_is_local(SockAddr addr);
-enum { ADDRTYPE_IPV4, ADDRTYPE_IPV6, ADDRTYPE_NAME };
+int sk_address_is_special_local(SockAddr addr);
 int sk_addrtype(SockAddr addr);
 void sk_addrcopy(SockAddr addr, char *buf);
 void sk_addr_free(SockAddr addr);
-
+/* sk_addr_dup generates another SockAddr which contains the same data
+ * as the original one and can be freed independently. May not actually
+ * physically _duplicate_ it: incrementing a reference count so that
+ * one more free is required before it disappears is an acceptable
+ * implementation. */
+SockAddr sk_addr_dup(SockAddr addr);
+
+/* NB, control of 'addr' is passed via sk_new, which takes responsibility
+ * for freeing it, as for new_connection() */
 Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
-	      int nodelay, Plug p);
+	      int nodelay, int keepalive, Plug p);
 
-Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only);
+Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only, int address_family);
 
-Socket sk_register(void *sock, Plug plug);
+Socket sk_register(OSSocket sock, Plug plug);
 
 #define sk_plug(s,p) (((*s)->plug) (s, p))
 #define sk_close(s) (((*s)->close) (s))
 #define sk_write(s,buf,len) (((*s)->write) (s, buf, len))
 #define sk_write_oob(s,buf,len) (((*s)->write_oob) (s, buf, len))
+#define sk_write_eof(s) (((*s)->write_eof) (s))
 #define sk_flush(s) (((*s)->flush) (s))
 
 #ifdef DEFINE_PLUG_METHOD_MACROS
+#define plug_log(p,type,addr,port,msg,code) (((*p)->log) (p, type, addr, port, msg, code))
 #define plug_closing(p,msg,code,callback) (((*p)->closing) (p, msg, code, callback))
 #define plug_receive(p,urgent,buf,len) (((*p)->receive) (p, urgent, buf, len))
 #define plug_sent(p,bufsize) (((*p)->sent) (p, bufsize))
@@ -167,6 +205,12 @@ void net_pending_errors(void);
  */
 int net_service_lookup(char *service);
 
+/*
+ * Look up the local hostname; return value needs freeing.
+ * May return NULL.
+ */
+char *get_hostname(void);
+
 /********** SSL stuff **********/
 
 /*