#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
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) */
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);
+ /*
+ * 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) */
* 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.
*/
};
* 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);
+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, Plug plug,
- const Config *cfg);
+ 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_addr_needs_port(SockAddr addr);
+int sk_hostname_is_local(const 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);
-
-Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only);
+ int nodelay, int keepalive, Plug p);
-Socket sk_register(OSSocket sock, Plug plug);
+Socket sk_newlistener(char *srcaddr, int port, Plug plug, int local_host_only, int address_family);
#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))
-#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,
*/
#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).
*/
int net_service_lookup(char *service);
+/*
+ * Look up the local hostname; return value needs freeing.
+ * May return NULL.
+ */
+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 **********/
/*