Fix breakage of SSH-2 packet decompression by r10070.

[PuTTY_svn.git] / network.h

diff --git a/network.h b/network.h
index 6ee7081e50bcd5a7357496aa5d06efb7f56565ae..675d24c7c5575f3e20e52b7822321f5e157af683 100644 (file)
--- 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
@@ -25,10 +25,6 @@ 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) */
@@ -37,14 +33,16 @@ 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);
     void (*set_frozen) (Socket s, int is_frozen);
     /* ignored by tcp, but vital for ssl */
     const char *(*socket_error) (Socket s);
 };
 
+typedef union { void *p; int i; } accept_ctx_t;
+typedef Socket (*accept_fn_t)(accept_ctx_t ctx, Plug plug);
+
 struct plug_function_table {
     void (*log)(Plug p, int type, SockAddr addr, int port,
                const char *error_msg, int error_code);
@@ -82,9 +80,12 @@ 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, OSSocket sock);
+    int (*accepting)(Plug p, accept_fn_t constructor, accept_ctx_t ctx);
     /*
-     * returns 0 if the host at address addr is a valid host for connecting or error
+     * `accepting' is called only on listener-type sockets, and is
+     * passed a constructor function+context that will create a fresh
+     * Socket describing the connection. It returns nonzero if it
+     * doesn't want the connection for some reason, or 0 on success.
      */
 };
 
@@ -94,18 +95,20 @@ struct plug_function_table {
 Socket new_connection(SockAddr addr, char *hostname,
                      int port, int privport,
                      int oobinline, int nodelay, int keepalive,
-                     Plug plug, const Config *cfg);
+                     Plug plug, Conf *conf);
 Socket new_listener(char *srcaddr, int port, Plug plug, int local_host_only,
-                   const Config *cfg, int addressfamily);
+                   Conf *conf, int addressfamily);
 SockAddr name_lookup(char *host, int port, char **canonicalname,
-                    const Config *cfg, int addressfamily);
+                    Conf *conf, int addressfamily);
+int proxy_for_destination (SockAddr addr, const char *hostname, int port,
+                           Conf *conf);
 
 /* 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, const Config *cfg);
+                              Plug plug, Conf *conf);
 
 /* socket functions */
 
@@ -115,8 +118,10 @@ void sk_cleanup(void);                    /* called just before program exit */
 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_addr_needs_port(SockAddr addr);
+int sk_hostname_is_local(const char *name);
 int sk_address_is_local(SockAddr addr);
+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);
@@ -134,12 +139,11 @@ Socket sk_new(SockAddr addr, int port, int privport, int oobinline,
 
 Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only, int address_family);
 
-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
@@ -147,19 +151,9 @@ Socket sk_register(OSSocket sock, Plug plug);
 #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))
-#define plug_accepting(p, sock) (((*p)->accepting)(p, sock))
+#define plug_accepting(p, constructor, ctx) (((*p)->accepting)(p, constructor, ctx))
 #endif
 
-/*
- * Each socket abstraction contains a `void *' private field in
- * which the client can keep state.
- *
- * This is perhaps unnecessary now that we have the notion of a plug,
- * but there is some existing code that uses it, so it stays.
- */
-#define sk_set_private_ptr(s, ptr) (((*s)->set_private_ptr) (s, ptr))
-#define sk_get_private_ptr(s) (((*s)->get_private_ptr) (s))
-
 /*
  * Special error values are returned from sk_namelookup and sk_new
  * if there's a problem. These functions extract an error message,
@@ -187,12 +181,6 @@ const char *sk_addr_error(SockAddr addr);
  */
 #define sk_set_frozen(s, is_frozen) (((*s)->set_frozen) (s, is_frozen))
 
-/*
- * Call this after an operation that might have tried to send on a
- * socket, to clean up any pending network errors.
- */
-void net_pending_errors(void);
-
 /*
  * Simple wrapper on getservbyname(), needed by ssh.c. Returns the
  * port number, in host byte order (suitable for printf and so on).
@@ -208,6 +196,12 @@ int net_service_lookup(char *service);
  */
 char *get_hostname(void);
 
+/*
+ * Trivial socket implementation which just stores an error. Found in
+ * errsock.c.
+ */
+Socket new_error_socket(const char *errmsg, Plug plug);
+
 /********** SSL stuff **********/
 
 /*