Integrate unfix.org's IPv6 patches up to level 10, with rather a lot

[u/mdw/putty] / telnet.c

diff --git a/telnet.c b/telnet.c
index 6f6deae..6789e5d 100644 (file)
--- a/telnet.c
+++ b/telnet.c
@@ -244,6 +244,8 @@ typedef struct telnet_tag {
     } state;
 
     Config cfg;
+
+    Pinger pinger;
 } *Telnet;
 
 #define TELNET_MAX_BACKLOG 4096
@@ -518,8 +520,13 @@ static void process_subneg(Telnet telnet)
            b[n++] = IAC;
            b[n++] = SE;
            telnet->bufsize = sk_write(telnet->s, (char *)b, n);
-           logbuf = dupprintf("client:\tSB %s IS %s", telopt(telnet->sb_opt),
-                              n == 6 ? "<nothing>" : "<stuff>");
+           logbuf = dupprintf("client:\tSB %s IS %s%s%s%s",
+                              telopt(telnet->sb_opt),
+                              *telnet->cfg.username ? "USER=" : "",
+                              telnet->cfg.username,
+                              *telnet->cfg.username ? " " : "",
+                              n == 6 ? "<nothing>" :
+                              (*telnet->cfg.environmt ? "<stuff>" : ""));
            logevent(telnet->frontend, logbuf);
            sfree(logbuf);
        }
@@ -631,7 +638,7 @@ static void do_telnet_read(Telnet telnet, char *buf, int len)
     }
 }
 
-static int telnet_closing(Plug plug, char *error_msg, int error_code,
+static int telnet_closing(Plug plug, const char *error_msg, int error_code,
                          int calling_back)
 {
     Telnet telnet = (Telnet) plug;
@@ -639,11 +646,12 @@ static int telnet_closing(Plug plug, char *error_msg, int error_code,
     if (telnet->s) {
         sk_close(telnet->s);
         telnet->s = NULL;
+       notify_remote_exit(telnet->frontend);
     }
     if (error_msg) {
        /* A socket error has occurred. */
        logevent(telnet->frontend, error_msg);
-       connection_fatal("%s", error_msg);
+       connection_fatal(telnet->frontend, "%s", error_msg);
     }                                 /* Otherwise, the remote side closed the connection normally. */
     return 0;
 }
@@ -671,9 +679,10 @@ static void telnet_sent(Plug plug, int bufsize)
  * Also places the canonical host name into `realhost'. It must be
  * freed by the caller.
  */
-static char *telnet_init(void *frontend_handle, void **backend_handle,
-                        Config *cfg,
-                        char *host, int port, char **realhost, int nodelay)
+static const char *telnet_init(void *frontend_handle, void **backend_handle,
+                              Config *cfg,
+                              char *host, int port, char **realhost,
+                              int nodelay, int keepalive)
 {
     static const struct plug_function_table fn_table = {
        telnet_closing,
@@ -681,7 +690,7 @@ static char *telnet_init(void *frontend_handle, void **backend_handle,
        telnet_sent
     };
     SockAddr addr;
-    char *err;
+    const char *err;
     Telnet telnet;
 
     telnet = snew(struct telnet_tag);
@@ -697,6 +706,8 @@ static char *telnet_init(void *frontend_handle, void **backend_handle,
     telnet->term_width = telnet->cfg.width;
     telnet->term_height = telnet->cfg.height;
     telnet->state = TOP_LEVEL;
+    telnet->ldisc = NULL;
+    telnet->pinger = NULL;
     *backend_handle = telnet;
 
     /*
@@ -704,13 +715,18 @@ static char *telnet_init(void *frontend_handle, void **backend_handle,
      */
     {
        char *buf;
-       buf = dupprintf("Looking up host \"%s\"", host);
+       buf = dupprintf("Looking up host \"%s\"%s", host,
+                       (cfg->addressfamily == ADDRTYPE_IPV4 ? " (IPv4)" :
+                        (cfg->addressfamily == ADDRTYPE_IPV6 ? " (IPv6)" :
+                         "")));
        logevent(telnet->frontend, buf);
        sfree(buf);
     }
-    addr = name_lookup(host, port, realhost, &telnet->cfg);
-    if ((err = sk_addr_error(addr)) != NULL)
+    addr = name_lookup(host, port, realhost, &telnet->cfg, cfg->addressfamily);
+    if ((err = sk_addr_error(addr)) != NULL) {
+       sk_addr_free(addr);
        return err;
+    }
 
     if (port < 0)
        port = 23;                     /* default telnet port */
@@ -726,11 +742,11 @@ static char *telnet_init(void *frontend_handle, void **backend_handle,
        sfree(buf);
     }
     telnet->s = new_connection(addr, *realhost, port, 0, 1,
-                              nodelay, (Plug) telnet, &telnet->cfg);
+                              nodelay, keepalive, (Plug) telnet, &telnet->cfg);
     if ((err = sk_socket_error(telnet->s)) != NULL)
        return err;
 
-    sk_addr_free(addr);
+    telnet->pinger = pinger_new(&telnet->cfg, &telnet_backend, telnet);
 
     /*
      * Initialise option states.
@@ -756,6 +772,11 @@ static char *telnet_init(void *frontend_handle, void **backend_handle,
      */
     telnet->in_synch = FALSE;
 
+    /*
+     * We can send special commands from the start.
+     */
+    update_specials_menu(telnet->frontend);
+
     return NULL;
 }
 
@@ -766,6 +787,8 @@ static void telnet_free(void *handle)
     sfree(telnet->sb_buf);
     if (telnet->s)
        sk_close(telnet->s);
+    if (telnet->pinger)
+       pinger_free(telnet->pinger);
     sfree(telnet);
 }
 /*
@@ -776,6 +799,7 @@ static void telnet_free(void *handle)
 static void telnet_reconfig(void *handle, Config *cfg)
 {
     Telnet telnet = (Telnet) handle;
+    pinger_reconfig(telnet->pinger, &telnet->cfg, cfg);
     telnet->cfg = *cfg;                       /* STRUCTURE COPY */
 }
 
@@ -952,9 +976,34 @@ static void telnet_special(void *handle, Telnet_Special code)
            telnet->bufsize = sk_write(telnet->s, (char *)b, 2);
        }
        break;
+      default:
+       break;  /* never heard of it */
     }
 }
 
+static const struct telnet_special *telnet_get_specials(void *handle)
+{
+    static const struct telnet_special specials[] = {
+       {"Are You There", TS_AYT},
+       {"Break", TS_BRK},
+       {"Synch", TS_SYNCH},
+       {"Erase Character", TS_EC},
+       {"Erase Line", TS_EL},
+       {"Go Ahead", TS_GA},
+       {"No Operation", TS_NOP},
+       {NULL, TS_SEP},
+       {"Abort Process", TS_ABORT},
+       {"Abort Output", TS_AO},
+       {"Interrupt Process", TS_IP},
+       {"Suspend Process", TS_SUSP},
+       {NULL, TS_SEP},
+       {"End Of Record", TS_EOR},
+       {"End Of File", TS_EOF},
+       {NULL, TS_EXITMENU}
+    };
+    return specials;
+}
+
 static Socket telnet_socket(void *handle)
 {
     Telnet telnet = (Telnet) handle;
@@ -1004,6 +1053,14 @@ static int telnet_exitcode(void *handle)
         return 0;
 }
 
+/*
+ * cfg_info for Telnet does nothing at all.
+ */
+static int telnet_cfg_info(void *handle)
+{
+    return 0;
+}
+
 Backend telnet_backend = {
     telnet_init,
     telnet_free,
@@ -1012,6 +1069,7 @@ Backend telnet_backend = {
     telnet_sendbuffer,
     telnet_size,
     telnet_special,
+    telnet_get_specials,
     telnet_socket,
     telnet_exitcode,
     telnet_sendok,
@@ -1019,5 +1077,6 @@ Backend telnet_backend = {
     telnet_provide_ldisc,
     telnet_provide_logctx,
     telnet_unthrottle,
+    telnet_cfg_info,
     23
 };