From: simon <simon@cda61777-01e9-0310-a592-d414129be87e>
Date: Sun, 12 Jan 2003 15:26:10 +0000 (+0000)
Subject: proxy.c now no longer refers to `cfg'. Instead, each of the three
X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/commitdiff_plain/e8fa8f62da443bfc89c416d3eeafcde69c8c6403

proxy.c now no longer refers to `cfg'. Instead, each of the three
proxy-indirection network functions (name_lookup, new_connection,
new_listener) takes a `const Config *' as an argument, and extracts
enough information from it before returning to handle that
particular network operation in accordance with the proxy settings
it specifies. This involved {win,ux}net.c due to a `const'
repercussion.


git-svn-id: svn://svn.tartarus.org/sgt/putty@2567 cda61777-01e9-0310-a592-d414129be87e
---

diff --git a/network.h b/network.h
index 673831fb..657bdcb2 100644
--- a/network.h
+++ b/network.h
@@ -13,6 +13,13 @@
 #ifndef PUTTY_NETWORK_H
 #define PUTTY_NETWORK_H
 
+#ifndef DONE_TYPEDEFS
+#define DONE_TYPEDEFS
+typedef struct config_tag Config;
+typedef struct backend_tag Backend;
+typedef struct terminal_tag Terminal;
+#endif
+
 typedef struct SockAddr_tag *SockAddr;
 /* pay attention to levels of indirection */
 typedef struct socket_function_table **Socket;
@@ -66,17 +73,20 @@ struct plug_function_table {
 /* proxy indirection layer */
 Socket new_connection(SockAddr addr, char *hostname,
 		      int port, int privport,
-		      int oobinline, int nodelay, Plug plug);
-Socket new_listener(char *srcaddr, int port, Plug plug, int local_host_only);
-SockAddr name_lookup(char *host, int port, char **canonicalname);
+		      int oobinline, int nodelay, Plug plug,
+		      const Config *cfg);
+Socket new_listener(char *srcaddr, int port, Plug plug, int local_host_only,
+		    const Config *cfg);
+SockAddr name_lookup(char *host, int port, char **canonicalname,
+		     const Config *cfg);
 
 /* socket functions */
 
 void sk_init(void);		       /* called once at program startup */
 void sk_cleanup(void);		       /* called just before program exit */
 
-SockAddr sk_namelookup(char *host, char **canonicalname);
-SockAddr sk_nonamelookup(char *host);
+SockAddr sk_namelookup(const char *host, char **canonicalname);
+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);
diff --git a/portfwd.c b/portfwd.c
index 010838ea..e1499de9 100644
--- a/portfwd.c
+++ b/portfwd.c
@@ -108,7 +108,8 @@ static void pfd_sent(Plug plug, int bufsize)
 /*
  * Called when receiving a PORT OPEN from the server
  */
-char *pfd_newconnect(Socket *s, char *hostname, int port, void *c)
+char *pfd_newconnect(Socket *s, char *hostname, int port, void *c,
+		     const Config *cfg)
 {
     static struct plug_function_table fn_table = {
 	pfd_closing,
@@ -124,7 +125,7 @@ char *pfd_newconnect(Socket *s, char *hostname, int port, void *c)
     /*
      * Try to find host.
      */
-    addr = name_lookup(hostname, port, &dummy_realhost);
+    addr = name_lookup(hostname, port, &dummy_realhost, cfg);
     if ((err = sk_addr_error(addr)) != NULL)
 	return err;
 
@@ -138,7 +139,8 @@ char *pfd_newconnect(Socket *s, char *hostname, int port, void *c)
     pr->c = c;
     pr->backhandle = NULL;	       /* we shouldn't need this */
 
-    pr->s = *s = new_connection(addr, dummy_realhost, port, 0, 1, 0, (Plug) pr);
+    pr->s = *s = new_connection(addr, dummy_realhost, port,
+				0, 1, 0, (Plug) pr, cfg);
     if ((err = sk_socket_error(*s)) != NULL) {
 	sfree(pr);
 	return err;
@@ -204,7 +206,7 @@ static int pfd_accepting(Plug p, void *sock)
  sets up a listener on the local machine on (srcaddr:)port
  */
 char *pfd_addforward(char *desthost, int destport, char *srcaddr, int port,
-		     void *backhandle, int acceptall)
+		     void *backhandle, const Config *cfg)
 {
     static struct plug_function_table fn_table = {
 	pfd_closing,
@@ -230,7 +232,8 @@ char *pfd_addforward(char *desthost, int destport, char *srcaddr, int port,
     pr->waiting = NULL;
     pr->backhandle = backhandle;
 
-    pr->s = s = new_listener(srcaddr, port, (Plug) pr, !acceptall);
+    pr->s = s = new_listener(srcaddr, port, (Plug) pr,
+			     !cfg->lport_acceptall, cfg);
     if ((err = sk_socket_error(s)) != NULL) {
 	sfree(pr);
 	return err;
diff --git a/proxy.c b/proxy.c
index a4847b9a..be238c34 100644
--- a/proxy.c
+++ b/proxy.c
@@ -14,9 +14,9 @@
 #include "network.h"
 #include "proxy.h"
 
-#define do_proxy_dns \
-    (cfg.proxy_dns == 2 || \
-	 (cfg.proxy_dns == 1 && cfg.proxy_type != PROXY_SOCKS))
+#define do_proxy_dns(cfg) \
+    (cfg->proxy_dns == 2 || \
+	 (cfg->proxy_dns == 1 && cfg->proxy_type != PROXY_SOCKS))
 
 /*
  * Call this when proxy negotiation is complete, so that this
@@ -248,18 +248,19 @@ static int plug_proxy_accepting (Plug p, void *sock)
  * This function can accept a NULL pointer as `addr', in which case
  * it will only check the host name.
  */
-static int proxy_for_destination (SockAddr addr, char * hostname, int port)
+static int proxy_for_destination (SockAddr addr, char *hostname, int port,
+				  const Config *cfg)
 {
     int s = 0, e = 0;
     char hostip[64];
     int hostip_len, hostname_len;
-    char * exclude_list;
+    const char *exclude_list;
 
     /*
      * Check the host name and IP against the hard-coded
      * representations of `localhost'.
      */
-    if (!cfg.even_proxy_localhost &&
+    if (!cfg->even_proxy_localhost &&
 	(sk_hostname_is_local(hostname) ||
 	 (addr && sk_address_is_local(addr))))
 	return 0;		       /* do not proxy */
@@ -272,7 +273,7 @@ static int proxy_for_destination (SockAddr addr, char * hostname, int port)
 
     hostname_len = strlen(hostname);
 
-    exclude_list = cfg.proxy_exclude_list;
+    exclude_list = cfg->proxy_exclude_list;
 
     /* now parse the exclude list, and see if either our IP
      * or hostname matches anything in it.
@@ -332,10 +333,12 @@ static int proxy_for_destination (SockAddr addr, char * hostname, int port)
     return 1;
 }
 
-SockAddr name_lookup(char *host, int port, char **canonicalname)
+SockAddr name_lookup(char *host, int port, char **canonicalname,
+		     const Config *cfg)
 {
-    if (cfg.proxy_type != PROXY_NONE &&
-	do_proxy_dns && proxy_for_destination(NULL, host, port)) {
+    if (cfg->proxy_type != PROXY_NONE &&
+	do_proxy_dns(cfg) &&
+	proxy_for_destination(NULL, host, port, cfg)) {
 	*canonicalname = dupstr(host);
 	return sk_nonamelookup(host);
     }
@@ -345,7 +348,8 @@ SockAddr name_lookup(char *host, int port, char **canonicalname)
 
 Socket new_connection(SockAddr addr, char *hostname,
 		      int port, int privport,
-		      int oobinline, int nodelay, Plug plug)
+		      int oobinline, int nodelay, Plug plug,
+		      const Config *cfg)
 {
     static const struct socket_function_table socket_fn_table = {
 	sk_proxy_plug,
@@ -366,8 +370,8 @@ Socket new_connection(SockAddr addr, char *hostname,
 	plug_proxy_accepting
     };
 
-    if (cfg.proxy_type != PROXY_NONE &&
-	proxy_for_destination(addr, hostname, port))
+    if (cfg->proxy_type != PROXY_NONE &&
+	proxy_for_destination(addr, hostname, port, cfg))
     {
 	Proxy_Socket ret;
 	Proxy_Plug pplug;
@@ -376,6 +380,7 @@ Socket new_connection(SockAddr addr, char *hostname,
 
 	ret = smalloc(sizeof(struct Socket_proxy_tag));
 	ret->fn = &socket_fn_table;
+	ret->cfg = *cfg;	       /* STRUCTURE COPY */
 	ret->plug = plug;
 	ret->remote_addr = addr;
 	ret->remote_port = port;
@@ -392,14 +397,14 @@ Socket new_connection(SockAddr addr, char *hostname,
 	ret->state = PROXY_STATE_NEW;
 	ret->negotiate = NULL;
 	
-	if (cfg.proxy_type == PROXY_HTTP) {
+	if (cfg->proxy_type == PROXY_HTTP) {
 	    ret->negotiate = proxy_http_negotiate;
-	} else if (cfg.proxy_type == PROXY_SOCKS) {
-	    if (cfg.proxy_socks_version == 4)
+	} else if (cfg->proxy_type == PROXY_SOCKS) {
+	    if (cfg->proxy_socks_version == 4)
 		ret->negotiate = proxy_socks4_negotiate;
 	    else
 		ret->negotiate = proxy_socks5_negotiate;
-	} else if (cfg.proxy_type == PROXY_TELNET) {
+	} else if (cfg->proxy_type == PROXY_TELNET) {
 	    ret->negotiate = proxy_telnet_negotiate;
 	} else {
 	    ret->error = "Proxy error: Unknown proxy method";
@@ -413,7 +418,7 @@ Socket new_connection(SockAddr addr, char *hostname,
 	pplug->proxy_socket = ret;
 
 	/* look-up proxy */
-	proxy_addr = sk_namelookup(cfg.proxy_host,
+	proxy_addr = sk_namelookup(cfg->proxy_host,
 				   &proxy_canonical_name);
 	if ((err = sk_addr_error(proxy_addr)) != NULL) {
 	    ret->error = "Proxy error: Unable to resolve proxy host name";
@@ -424,7 +429,7 @@ Socket new_connection(SockAddr addr, char *hostname,
 	/* create the actual socket we will be using,
 	 * connected to our proxy server and port.
 	 */
-	ret->sub_socket = sk_new(proxy_addr, cfg.proxy_port,
+	ret->sub_socket = sk_new(proxy_addr, cfg->proxy_port,
 				 privport, oobinline,
 				 nodelay, (Plug) pplug);
 	if (sk_socket_error(ret->sub_socket) != NULL)
@@ -443,7 +448,8 @@ Socket new_connection(SockAddr addr, char *hostname,
     return sk_new(addr, port, privport, oobinline, nodelay, plug);
 }
 
-Socket new_listener(char *srcaddr, int port, Plug plug, int local_host_only)
+Socket new_listener(char *srcaddr, int port, Plug plug, int local_host_only,
+		    const Config *cfg)
 {
     /* TODO: SOCKS (and potentially others) support inbound
      * TODO: connections via the proxy. support them.
@@ -507,11 +513,11 @@ int proxy_http_negotiate (Proxy_Socket p, int change)
 	sk_write(p->sub_socket, buf, strlen(buf));
 	sfree(buf);
 
-	if (cfg.proxy_username[0] || cfg.proxy_password[0]) {
-	    char buf[sizeof(cfg.proxy_username)+sizeof(cfg.proxy_password)];
+	if (p->cfg.proxy_username[0] || p->cfg.proxy_password[0]) {
+	    char buf[sizeof(p->cfg.proxy_username)+sizeof(p->cfg.proxy_password)];
 	    char buf2[sizeof(buf)*4/3 + 100];
 	    int i, j, len;
-	    sprintf(buf, "%s:%s", cfg.proxy_username, cfg.proxy_password);
+	    sprintf(buf, "%s:%s", p->cfg.proxy_username, p->cfg.proxy_password);
 	    len = strlen(buf);
 	    sprintf(buf2, "Proxy-Authorization: basic ");
 	    for (i = 0, j = strlen(buf2); i < len; i += 3, j += 4)
@@ -695,9 +701,9 @@ int proxy_socks4_negotiate (Proxy_Socket p, int change)
 	    addr[3] = 1;
 	}
 
-	length = strlen(cfg.proxy_username) + namelen + 9;
+	length = strlen(p->cfg.proxy_username) + namelen + 9;
 	command = (char*) smalloc(length);
-	strcpy(command + 8, cfg.proxy_username);
+	strcpy(command + 8, p->cfg.proxy_username);
 
 	command[0] = 4; /* version 4 */
 	command[1] = 1; /* CONNECT command */
@@ -710,7 +716,7 @@ int proxy_socks4_negotiate (Proxy_Socket p, int change)
 	memcpy(command + 4, addr, 4);
 
 	/* hostname */
-	memcpy(command + 8 + strlen(cfg.proxy_username) + 1,
+	memcpy(command + 8 + strlen(p->cfg.proxy_username) + 1,
 	       hostname, namelen);
 
 	sk_write(p->sub_socket, command, length);
@@ -838,7 +844,7 @@ int proxy_socks5_negotiate (Proxy_Socket p, int change)
 	int len;
 
 	command[0] = 5; /* version 5 */
-	if (cfg.proxy_username[0] || cfg.proxy_password[0]) {
+	if (p->cfg.proxy_username[0] || p->cfg.proxy_password[0]) {
 	    command[1] = 2;	       /* two methods supported: */
 	    command[2] = 0x00;	       /* no authentication */
 	    command[3] = 0x02;	       /* username/password */
@@ -1107,18 +1113,18 @@ int proxy_socks5_negotiate (Proxy_Socket p, int change)
 	}
 
 	if (p->state == 5) {
-	    if (cfg.proxy_username[0] || cfg.proxy_password[0]) {
+	    if (p->cfg.proxy_username[0] || p->cfg.proxy_password[0]) {
 		char userpwbuf[514];
 		int ulen, plen;
-		ulen = strlen(cfg.proxy_username);
+		ulen = strlen(p->cfg.proxy_username);
 		if (ulen > 255) ulen = 255; if (ulen < 1) ulen = 1;
-		plen = strlen(cfg.proxy_password);
+		plen = strlen(p->cfg.proxy_password);
 		if (plen > 255) plen = 255; if (plen < 1) plen = 1;
 		userpwbuf[0] = 1;      /* version number of subnegotiation */
 		userpwbuf[1] = ulen;
-		memcpy(userpwbuf+2, cfg.proxy_username, ulen);
+		memcpy(userpwbuf+2, p->cfg.proxy_username, ulen);
 		userpwbuf[ulen+2] = plen;
-		memcpy(userpwbuf+ulen+3, cfg.proxy_password, plen);
+		memcpy(userpwbuf+ulen+3, p->cfg.proxy_password, plen);
 		sk_write(p->sub_socket, userpwbuf, ulen + plen + 3);
 		p->state = 7;
 	    } else 
@@ -1162,37 +1168,37 @@ int proxy_telnet_negotiate (Proxy_Socket p, int change)
 	 * %%, %host, %port, %user, and %pass
 	 */
 
-	while (cfg.proxy_telnet_command[eo] != 0) {
+	while (p->cfg.proxy_telnet_command[eo] != 0) {
 
 	    /* scan forward until we hit end-of-line, 
 	     * or an escape character (\ or %) */
-	    while (cfg.proxy_telnet_command[eo] != 0 &&
-		   cfg.proxy_telnet_command[eo] != '%' &&
-		   cfg.proxy_telnet_command[eo] != '\\') eo++;
+	    while (p->cfg.proxy_telnet_command[eo] != 0 &&
+		   p->cfg.proxy_telnet_command[eo] != '%' &&
+		   p->cfg.proxy_telnet_command[eo] != '\\') eo++;
 
 	    /* if we hit eol, break out of our escaping loop */
-	    if (cfg.proxy_telnet_command[eo] == 0) break;
+	    if (p->cfg.proxy_telnet_command[eo] == 0) break;
 
 	    /* if there was any unescaped text before the escape
 	     * character, send that now */
 	    if (eo != so) {
 		sk_write(p->sub_socket, 
-			 cfg.proxy_telnet_command + so, eo - so);
+			 p->cfg.proxy_telnet_command + so, eo - so);
 	    }
 
 	    so = eo++;
 
 	    /* if the escape character was the last character of
 	     * the line, we'll just stop and send it. */
-	    if (cfg.proxy_telnet_command[eo] == 0) break;
+	    if (p->cfg.proxy_telnet_command[eo] == 0) break;
 
-	    if (cfg.proxy_telnet_command[so] == '\\') {
+	    if (p->cfg.proxy_telnet_command[so] == '\\') {
 
 		/* we recognize \\, \%, \r, \n, \t, \x??. 
 		 * anything else, we just send unescaped (including the \). 
 		 */
 
-		switch (cfg.proxy_telnet_command[eo]) {
+		switch (p->cfg.proxy_telnet_command[eo]) {
 
 		  case '\\':
 		    sk_write(p->sub_socket, "\\", 1);
@@ -1228,15 +1234,15 @@ int proxy_telnet_negotiate (Proxy_Socket p, int change)
 
 		    for (;;) {
 			eo++;
-			if (cfg.proxy_telnet_command[eo] >= '0' &&
-			    cfg.proxy_telnet_command[eo] <= '9')
-			    v += cfg.proxy_telnet_command[eo] - '0';
-			else if (cfg.proxy_telnet_command[eo] >= 'a' &&
-				 cfg.proxy_telnet_command[eo] <= 'f')
-			    v += cfg.proxy_telnet_command[eo] - 'a' + 10;
-			else if (cfg.proxy_telnet_command[eo] >= 'A' &&
-				 cfg.proxy_telnet_command[eo] <= 'F')
-			    v += cfg.proxy_telnet_command[eo] - 'A' + 10;
+			if (p->cfg.proxy_telnet_command[eo] >= '0' &&
+			    p->cfg.proxy_telnet_command[eo] <= '9')
+			    v += p->cfg.proxy_telnet_command[eo] - '0';
+			else if (p->cfg.proxy_telnet_command[eo] >= 'a' &&
+				 p->cfg.proxy_telnet_command[eo] <= 'f')
+			    v += p->cfg.proxy_telnet_command[eo] - 'a' + 10;
+			else if (p->cfg.proxy_telnet_command[eo] >= 'A' &&
+				 p->cfg.proxy_telnet_command[eo] <= 'F')
+			    v += p->cfg.proxy_telnet_command[eo] - 'A' + 10;
 			else {
 			    /* non hex character, so we abort and just
 			     * send the whole thing unescaped (including \x)
@@ -1261,7 +1267,7 @@ int proxy_telnet_negotiate (Proxy_Socket p, int change)
 
 		  default:
 		    sk_write(p->sub_socket, 
-			     cfg.proxy_telnet_command + so, 2);
+			     p->cfg.proxy_telnet_command + so, 2);
 		    eo++;
 		    break;
 		}
@@ -1271,34 +1277,34 @@ int proxy_telnet_negotiate (Proxy_Socket p, int change)
 		 * anything else, we just send unescaped (including the %). 
 		 */
 
-		if (cfg.proxy_telnet_command[eo] == '%') {
+		if (p->cfg.proxy_telnet_command[eo] == '%') {
 		    sk_write(p->sub_socket, "%", 1);
 		    eo++;
 		}
-		else if (strnicmp(cfg.proxy_telnet_command + eo,
+		else if (strnicmp(p->cfg.proxy_telnet_command + eo,
 				  "host", 4) == 0) {
 		    char dest[512];
 		    sk_getaddr(p->remote_addr, dest, lenof(dest));
 		    sk_write(p->sub_socket, dest, strlen(dest));
 		    eo += 4;
 		}
-		else if (strnicmp(cfg.proxy_telnet_command + eo,
+		else if (strnicmp(p->cfg.proxy_telnet_command + eo,
 				  "port", 4) == 0) {
 		    char port[8];
 		    sprintf(port, "%i", p->remote_port);
 		    sk_write(p->sub_socket, port, strlen(port));
 		    eo += 4;
 		}
-		else if (strnicmp(cfg.proxy_telnet_command + eo,
+		else if (strnicmp(p->cfg.proxy_telnet_command + eo,
 				  "user", 4) == 0) {
-		    sk_write(p->sub_socket, cfg.proxy_username, 
-			strlen(cfg.proxy_username));
+		    sk_write(p->sub_socket, p->cfg.proxy_username, 
+			strlen(p->cfg.proxy_username));
 		    eo += 4;
 		}
-		else if (strnicmp(cfg.proxy_telnet_command + eo,
+		else if (strnicmp(p->cfg.proxy_telnet_command + eo,
 				  "pass", 4) == 0) {
-		    sk_write(p->sub_socket, cfg.proxy_password, 
-			strlen(cfg.proxy_password));
+		    sk_write(p->sub_socket, p->cfg.proxy_password, 
+			strlen(p->cfg.proxy_password));
 		    eo += 4;
 		}
 		else {
@@ -1316,7 +1322,7 @@ int proxy_telnet_negotiate (Proxy_Socket p, int change)
 
 	/* if there is any unescaped text at the end of the line, send it */
 	if (eo != so) {
-	    sk_write(p->sub_socket, cfg.proxy_telnet_command + so, eo - so);
+	    sk_write(p->sub_socket, p->cfg.proxy_telnet_command + so, eo - so);
 	}
 
 	p->state = 1;
diff --git a/proxy.h b/proxy.h
index c79759c4..cc11061e 100644
--- a/proxy.h
+++ b/proxy.h
@@ -79,6 +79,8 @@ struct Socket_proxy_tag {
     /* accepting */
     void *accepting_sock;
 
+    /* configuration, used to look up proxy settings */
+    Config cfg;
 };
 
 typedef struct Plug_proxy_tag * Proxy_Plug;
diff --git a/raw.c b/raw.c
index 09903338..94ff43f1 100644
--- a/raw.c
+++ b/raw.c
@@ -96,7 +96,7 @@ static char *raw_init(void *frontend_handle, void **backend_handle,
 	logevent(raw->frontend, buf);
 	sfree(buf);
     }
-    addr = name_lookup(host, port, realhost);
+    addr = name_lookup(host, port, realhost, cfg);
     if ((err = sk_addr_error(addr)) != NULL)
 	return err;
 
@@ -113,7 +113,8 @@ static char *raw_init(void *frontend_handle, void **backend_handle,
 	logevent(raw->frontend, buf);
 	sfree(buf);
     }
-    raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay, (Plug) raw);
+    raw->s = new_connection(addr, *realhost, port, 0, 1, nodelay,
+			    (Plug) raw, cfg);
     if ((err = sk_socket_error(raw->s)) != NULL)
 	return err;
 
diff --git a/rlogin.c b/rlogin.c
index afc3d2c3..8e5e6284 100644
--- a/rlogin.c
+++ b/rlogin.c
@@ -127,7 +127,7 @@ static char *rlogin_init(void *frontend_handle, void **backend_handle,
 	logevent(rlogin->frontend, buf);
 	sfree(buf);
     }
-    addr = name_lookup(host, port, realhost);
+    addr = name_lookup(host, port, realhost, cfg);
     if ((err = sk_addr_error(addr)) != NULL)
 	return err;
 
@@ -145,7 +145,7 @@ static char *rlogin_init(void *frontend_handle, void **backend_handle,
 	sfree(buf);
     }
     rlogin->s = new_connection(addr, *realhost, port, 1, 0,
-			       nodelay, (Plug) rlogin);
+			       nodelay, (Plug) rlogin, cfg);
     if ((err = sk_socket_error(rlogin->s)) != NULL)
 	return err;
 
diff --git a/ssh.c b/ssh.c
index dde5bfab..1b2e7e12 100644
--- a/ssh.c
+++ b/ssh.c
@@ -2055,7 +2055,7 @@ static char *connect_to_host(Ssh ssh, char *host, int port,
      * Try to find host.
      */
     logeventf(ssh, "Looking up host \"%s\"", host);
-    addr = name_lookup(host, port, realhost);
+    addr = name_lookup(host, port, realhost, &ssh->cfg);
     if ((err = sk_addr_error(addr)) != NULL)
 	return err;
 
@@ -2068,7 +2068,8 @@ static char *connect_to_host(Ssh ssh, char *host, int port,
 	logeventf(ssh, "Connecting to %s port %d", addrbuf, port);
     }
     ssh->fn = &fn_table;
-    ssh->s = new_connection(addr, *realhost, port, 0, 1, nodelay, (Plug) ssh);
+    ssh->s = new_connection(addr, *realhost, port,
+			    0, 1, nodelay, (Plug) ssh, &ssh->cfg);
     if ((err = sk_socket_error(ssh->s)) != NULL) {
 	ssh->s = NULL;
 	return err;
@@ -3121,7 +3122,7 @@ static void ssh1_protocol(Ssh ssh, unsigned char *in, int inlen, int ispkt)
 	    if (sport && dport) {
 		if (type == 'L') {
 		    pfd_addforward(host, dport, *saddr ? saddr : NULL,
-				   sport, ssh, ssh->cfg.lport_acceptall);
+				   sport, ssh, &ssh->cfg);
 		    logeventf(ssh, "Local port %.*s%.*s%.*s%.*s%d%.*s"
 			      " forwarding to %s:%.*s%.*s%d%.*s",
 			      (int)(*saddr?strlen(saddr):0), *saddr?saddr:NULL,
@@ -3285,7 +3286,7 @@ static void ssh1_protocol(Ssh ssh, unsigned char *in, int inlen, int ispkt)
 		    c->ssh = ssh;
 
 		    if (x11_init(&c->u.x11.s, ssh->cfg.x11_display, c,
-				 ssh->x11auth, NULL, -1) != NULL) {
+				 ssh->x11auth, NULL, -1, &ssh->cfg) != NULL) {
 			logevent("opening X11 forward connection failed");
 			sfree(c);
 			send_packet(ssh, SSH1_MSG_CHANNEL_OPEN_FAILURE,
@@ -3363,7 +3364,7 @@ static void ssh1_protocol(Ssh ssh, unsigned char *in, int inlen, int ispkt)
 		    sprintf(buf, "Received remote port open request for %s:%d",
 			    host, port);
 		    logevent(buf);
-		    e = pfd_newconnect(&c->u.pfd.s, host, port, c);
+		    e = pfd_newconnect(&c->u.pfd.s, host, port, c, &ssh->cfg);
 		    if (e != NULL) {
 			char buf[256];
 			sprintf(buf, "Port open failed: %s", e);
@@ -5185,7 +5186,7 @@ static void do_ssh2_authconn(Ssh ssh, unsigned char *in, int inlen, int ispkt)
 	    if (sport && dport) {
 		if (type == 'L') {
 		    pfd_addforward(host, dport, *saddr ? saddr : NULL,
-				   sport, ssh, ssh->cfg.lport_acceptall);
+				   sport, ssh, &ssh->cfg);
 		    logeventf(ssh, "Local port %.*s%.*s%.*s%.*s%d%.*s"
 			      " forwarding to %s:%.*s%.*s%d%.*s",
 			      (int)(*saddr?strlen(saddr):0), *saddr?saddr:NULL,
@@ -5746,7 +5747,8 @@ static void do_ssh2_authconn(Ssh ssh, unsigned char *in, int inlen, int ispkt)
 		    if (!ssh->X11_fwd_enabled)
 			error = "X11 forwarding is not enabled";
 		    else if (x11_init(&c->u.x11.s, ssh->cfg.x11_display, c,
-				      ssh->x11auth, addrstr, port) != NULL) {
+				      ssh->x11auth, addrstr, port,
+				      &ssh->cfg) != NULL) {
 			error = "Unable to open an X11 connection";
 		    } else {
 			c->type = CHAN_X11;
@@ -5765,7 +5767,7 @@ static void do_ssh2_authconn(Ssh ssh, unsigned char *in, int inlen, int ispkt)
 			error = "Remote port is not recognised";
 		    } else {
 			char *e = pfd_newconnect(&c->u.pfd.s, realpf->dhost,
-						 realpf->dport, c);
+						 realpf->dport, c, &ssh->cfg);
 			logeventf(ssh, "Received remote port open request"
 				  " for %s:%d", realpf->dhost, realpf->dport);
 			if (e != NULL) {
diff --git a/ssh.h b/ssh.h
index 56f9f261..29c3c40a 100644
--- a/ssh.h
+++ b/ssh.h
@@ -256,9 +256,10 @@ void *new_sock_channel(void *handle, Socket s);
 void ssh_send_port_open(void *channel, char *hostname, int port, char *org);
 
 /* Exports from portfwd.c */
-extern char *pfd_newconnect(Socket * s, char *hostname, int port, void *c);
+extern char *pfd_newconnect(Socket * s, char *hostname, int port, void *c,
+			    const Config *cfg);
 extern char *pfd_addforward(char *desthost, int destport, char *srcaddr,
-			    int port, void *backhandle, int acceptall);
+			    int port, void *backhandle, const Config *cfg);
 extern void pfd_close(Socket s);
 extern int pfd_send(Socket s, char *data, int len);
 extern void pfd_confirm(Socket s);
@@ -266,7 +267,8 @@ extern void pfd_unthrottle(Socket s);
 extern void pfd_override_throttle(Socket s, int enable);
 
 /* Exports from x11fwd.c */
-extern char *x11_init(Socket *, char *, void *, void *, const char *, int);
+extern char *x11_init(Socket *, char *, void *, void *, const char *, int,
+		      const Config *);
 extern void x11_close(Socket);
 extern int x11_send(Socket, char *, int);
 extern void *x11_invent_auth(char *, int, char *, int, int);
diff --git a/telnet.c b/telnet.c
index 2d87b310..53ad1804 100644
--- a/telnet.c
+++ b/telnet.c
@@ -689,7 +689,7 @@ static char *telnet_init(void *frontend_handle, void **backend_handle,
 	logevent(telnet->frontend, buf);
 	sfree(buf);
     }
-    addr = name_lookup(host, port, realhost);
+    addr = name_lookup(host, port, realhost, &telnet->cfg);
     if ((err = sk_addr_error(addr)) != NULL)
 	return err;
 
@@ -707,7 +707,7 @@ static char *telnet_init(void *frontend_handle, void **backend_handle,
 	sfree(buf);
     }
     telnet->s = new_connection(addr, *realhost, port, 0, 1,
-			       nodelay, (Plug) telnet);
+			       nodelay, (Plug) telnet, &telnet->cfg);
     if ((err = sk_socket_error(telnet->s)) != NULL)
 	return err;
 
diff --git a/unix/uxnet.c b/unix/uxnet.c
index 6b8729e3..08da8f42 100644
--- a/unix/uxnet.c
+++ b/unix/uxnet.c
@@ -117,7 +117,7 @@ char *error_string(int error)
     return strerror(error);
 }
 
-SockAddr sk_namelookup(char *host, char **canonicalname)
+SockAddr sk_namelookup(const char *host, char **canonicalname)
 {
     SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
     unsigned long a;
@@ -200,7 +200,7 @@ SockAddr sk_namelookup(char *host, char **canonicalname)
     return ret;
 }
 
-SockAddr sk_nonamelookup(char *host)
+SockAddr sk_nonamelookup(const char *host)
 {
     SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
     ret->error = NULL;
diff --git a/winnet.c b/winnet.c
index f2e84548..56d1500f 100644
--- a/winnet.c
+++ b/winnet.c
@@ -224,7 +224,7 @@ char *winsock_error_string(int error)
     }
 }
 
-SockAddr sk_namelookup(char *host, char **canonicalname)
+SockAddr sk_namelookup(const char *host, char **canonicalname)
 {
     SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
     unsigned long a;
@@ -362,7 +362,7 @@ SockAddr sk_namelookup(char *host, char **canonicalname)
     return ret;
 }
 
-SockAddr sk_nonamelookup(char *host)
+SockAddr sk_nonamelookup(const char *host)
 {
     SockAddr ret = smalloc(sizeof(struct SockAddr_tag));
     ret->error = NULL;
diff --git a/x11fwd.c b/x11fwd.c
index 135c0347..52e678b3 100644
--- a/x11fwd.c
+++ b/x11fwd.c
@@ -227,7 +227,7 @@ int x11_get_screen_number(char *display)
  * also, fills the SocketsStructure
  */
 char *x11_init(Socket * s, char *display, void *c, void *auth,
-	       const char *peeraddr, int peerport)
+	       const char *peeraddr, int peerport, const Config *cfg)
 {
     static const struct plug_function_table fn_table = {
 	x11_closing,
@@ -269,7 +269,7 @@ char *x11_init(Socket * s, char *display, void *c, void *auth,
     /*
      * Try to find host.
      */
-    addr = name_lookup(host, port, &dummy_realhost);
+    addr = name_lookup(host, port, &dummy_realhost, cfg);
     if ((err = sk_addr_error(addr)) != NULL)
 	return err;
 
@@ -285,7 +285,8 @@ char *x11_init(Socket * s, char *display, void *c, void *auth,
     pr->throttled = pr->throttle_override = 0;
     pr->c = c;
 
-    pr->s = *s = new_connection(addr, dummy_realhost, port, 0, 1, 0, (Plug) pr);
+    pr->s = *s = new_connection(addr, dummy_realhost, port,
+				0, 1, 0, (Plug) pr, cfg);
     if ((err = sk_socket_error(*s)) != NULL) {
 	sfree(pr);
 	return err;