+++ /dev/null
-diff -up screen/src/doc/screen.1.ipv6 screen/src/doc/screen.1
---- screen/src/doc/screen.1.ipv6 2010-11-11 03:47:46.000000000 +0100
-+++ screen/src/doc/screen.1 2011-02-03 16:05:35.957087079 +0100
-@@ -400,6 +400,12 @@
- \fB-r\fP option to tell screen to look only for attached or
- detached screen sessions. Note that this command doesn't work if
- the session is password protected.
-+.TP 5
-+.B \-4
-+Resolve hostnames only to IPv4 addresses.
-+.TP 5
-+.B \-6
-+Resolve hostnames only to IPv6 addresses.
-
- .SH "DEFAULT KEY BINDINGS"
- .ta 12n 26n
-diff -up screen/src/extern.h.ipv6 screen/src/extern.h
---- screen/src/extern.h.ipv6 2010-11-11 03:47:46.000000000 +0100
-+++ screen/src/extern.h 2011-02-03 16:04:35.995743620 +0100
-@@ -455,8 +455,7 @@ extern void ExitOverlayPage __P((void))
-
- /* teln.c */
- #ifdef BUILTIN_TELNET
--extern int TelOpen __P((char **));
--extern int TelConnect __P((struct win *));
-+extern int TelOpenAndConnect __P((struct win *));
- extern int TelIsline __P((struct win *p));
- extern void TelProcessLine __P((char **, int *));
- extern int DoTelnet __P((char *, int *, int));
-diff -up screen/src/help.c.ipv6 screen/src/help.c
---- screen/src/help.c.ipv6 2010-11-11 03:47:46.000000000 +0100
-+++ screen/src/help.c 2011-02-03 16:04:35.992744154 +0100
-@@ -66,6 +66,10 @@ char *myname, *message, *arg;
- {
- printf("Use: %s [-opts] [cmd [args]]\n", myname);
- printf(" or: %s -r [host.tty]\n\nOptions:\n", myname);
-+#ifdef BUILTIN_TELNET
-+ printf("-4 Resolve hostnames only to IPv4 addresses.\n");
-+ printf("-6 Resolve hostnames only to IPv6 addresses.\n");
-+#endif
- printf("-a Force all capabilities into each window's termcap.\n");
- printf("-A -[r|R] Adapt all windows to the new display width & height.\n");
- printf("-c file Read configuration file instead of '.screenrc'.\n");
-diff -up screen/src/screen.c.ipv6 screen/src/screen.c
---- screen/src/screen.c.ipv6 2010-11-11 03:47:46.000000000 +0100
-+++ screen/src/screen.c 2011-02-03 16:04:35.994743798 +0100
-@@ -248,8 +248,9 @@ struct layer *flayer;
- struct win *fore;
- struct win *windows;
- struct win *console_window;
--
--
-+#ifdef BUILTIN_TELNET
-+int af;
-+#endif
-
- /*
- * Do this last
-@@ -507,6 +508,9 @@ char **av;
- nwin = nwin_undef;
- nwin_options = nwin_undef;
- strcpy(screenterm, "screen");
-+#ifdef BUILTIN_TELNET
-+ af = AF_UNSPEC;
-+#endif
-
- logreopen_register(lf_secreopen);
-
-@@ -541,6 +545,14 @@ char **av;
- {
- switch (*ap)
- {
-+#ifdef BUILTIN_TELNET
-+ case '4':
-+ af = AF_INET;
-+ break;
-+ case '6':
-+ af = AF_INET6;
-+ break;
-+#endif
- case 'a':
- nwin_options.aflag = 1;
- break;
-diff -up screen/src/teln.c.ipv6 screen/src/teln.c
---- screen/src/teln.c.ipv6 2010-11-11 03:47:46.000000000 +0100
-+++ screen/src/teln.c 2011-02-03 16:04:35.992744154 +0100
-@@ -30,6 +30,7 @@
- #include <sys/socket.h>
- #include <fcntl.h>
- #include <netdb.h>
-+#include <stdio.h>
-
- #include "config.h"
-
-@@ -42,12 +43,13 @@ extern struct win *fore;
- extern struct layer *flayer;
- extern int visual_bell;
- extern char screenterm[];
-+extern int af;
-
- static void TelReply __P((struct win *, char *, int));
- static void TelDocmd __P((struct win *, int, int));
- static void TelDosub __P((struct win *));
--
--#define TEL_DEFPORT 23
-+// why TEL_DEFPORT has "
-+#define TEL_DEFPORT "23"
- #define TEL_CONNECTING (-2)
-
- #define TC_IAC 255
-@@ -105,86 +107,78 @@ char *data;
- }
-
- int
--TelOpen(args)
--char **args;
--{
-- int fd;
-- int on = 1;
--
-- if ((fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
-- {
-- Msg(errno, "TelOpen: socket");
-- return -1;
-- }
-- if (setsockopt(fd, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)))
-- Msg(errno, "TelOpen: setsockopt SO_OOBINLINE");
-- return fd;
--}
--
--int
--TelConnect(p)
--struct win *p;
--{
-- int port = TEL_DEFPORT;
-- struct hostent *hp;
-- char **args;
-+TelOpenAndConnect(struct win *p) {
-+ int fd, on = 1;
- char buf[256];
-
-- args = p->w_cmdargs + 1;
--
-- if (!*args)
-- {
-- Msg(0, "Usage: screen //telnet host [port]");
-- return -1;
-- }
-- if (args[1])
-- port = atoi(args[1]);
-- p->w_telsa.sin_family = AF_INET;
-- if((p->w_telsa.sin_addr.s_addr = inet_addr(*args)) == -1)
-- {
-- if ((hp = gethostbyname(*args)) == NULL)
-- {
-- Msg(0, "unknown host: %s", *args);
-- return -1;
-- }
-- if (hp->h_length != sizeof(p->w_telsa.sin_addr.s_addr) || hp->h_addrtype != AF_INET)
-- {
-- Msg(0, "Bad address type for %s", hp->h_name);
-- return -1;
-- }
-- bcopy((char *)hp->h_addr,(char *)&p->w_telsa.sin_addr.s_addr, hp->h_length);
-- p->w_telsa.sin_family = hp->h_addrtype;
-- }
-- p->w_telsa.sin_port = htons(port);
-- if (port != TEL_DEFPORT)
-- sprintf(buf, "Trying %s %d...", inet_ntoa(p->w_telsa.sin_addr), port);
-- else
-- sprintf(buf, "Trying %s...", inet_ntoa(p->w_telsa.sin_addr));
-- WriteString(p, buf, strlen(buf));
-- if (connect(p->w_ptyfd, (struct sockaddr *)&p->w_telsa, sizeof(p->w_telsa)))
-- {
-- if (errno == EINPROGRESS)
-- {
-- p->w_telstate = TEL_CONNECTING;
-- p->w_telconnev.fd = p->w_ptyfd;
-- p->w_telconnev.handler = tel_connev_fn;
-- p->w_telconnev.data = (char *)p;
-- p->w_telconnev.type = EV_WRITE;
-- p->w_telconnev.pri = 1;
-- debug("telnet connect in progress...\n");
-- evenq(&p->w_telconnev);
-- }
-- else
-- {
-- Msg(errno, "TelOpen: connect");
-- return -1;
-- }
-- }
-- else
-- WriteString(p, "connected.\r\n", 12);
-- if (port == TEL_DEFPORT)
-- TelReply(p, (char *)tn_init, sizeof(tn_init));
-- return 0;
-+ struct addrinfo hints, *res0, *res;
-+
-+ if (!(p->w_cmdargs[1])) {
-+ Msg(0, "Usage: screen //telnet host [port]");
-+ return -1;
-+ }
-+
-+ memset(&hints, 0, sizeof(hints));
-+ hints.ai_family = af;
-+ hints.ai_socktype = SOCK_STREAM;
-+ hints.ai_protocol = IPPROTO_TCP;
-+ if(getaddrinfo(p->w_cmdargs[1], p->w_cmdargs[2] ? p->w_cmdargs[2] : TEL_DEFPORT,
-+ &hints, &res0)) {
-+ Msg(0, "unknown host: %s", p->w_cmdargs[1]);
-+ return -1;
-+ }
-+
-+ for(res = res0; res; res = res->ai_next) {
-+ if((fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) == -1) {
-+ if(res->ai_next)
-+ continue;
-+ else {
-+ Msg(errno, "TelOpenAndConnect: socket");
-+ freeaddrinfo(res0);
-+ return -1;
-+ }
-+ }
-+
-+ if (setsockopt(fd, SOL_SOCKET, SO_OOBINLINE, (char *)&on, sizeof(on)))
-+ Msg(errno, "TelOpenAndConnect: setsockopt SO_OOBINLINE");
-+
-+ if (p->w_cmdargs[2] && strcmp(p->w_cmdargs[2], TEL_DEFPORT))
-+ snprintf(buf, 256, "Trying %s %s...", p->w_cmdargs[1], p->w_cmdargs[2]);
-+ else
-+ snprintf(buf, 256, "Trying %s...", p->w_cmdargs[1]);
-+ WriteString(p, buf, strlen(buf));
-+ if (connect(fd, res->ai_addr, res->ai_addrlen)) {
-+ if (errno == EINPROGRESS) {
-+ p->w_telstate = TEL_CONNECTING;
-+ p->w_telconnev.fd = fd;
-+ p->w_telconnev.handler = tel_connev_fn;
-+ p->w_telconnev.data = (char *)p;
-+ p->w_telconnev.type = EV_WRITE;
-+ p->w_telconnev.pri = 1;
-+ debug("telnet connect in progress...\n");
-+ evenq(&p->w_telconnev);
-+ }
-+ else {
-+ close(fd);
-+ if(res->ai_next)
-+ continue;
-+ else {
-+ Msg(errno, "TelOpenAndConnect: connect");
-+ freeaddrinfo(res0);
-+ return -1;
-+ }
-+ }
-+ }
-+ else
-+ WriteString(p, "connected.\r\n", 12);
-+ if (!(p->w_cmdargs[2] && strcmp(p->w_cmdargs[2], TEL_DEFPORT)))
-+ TelReply(p, (char *)tn_init, sizeof(tn_init));
-+ p->w_ptyfd = fd;
-+ memcpy(&p->w_telsa, &res->ai_addr, sizeof(res->ai_addr));
-+ freeaddrinfo(res0);
-+ return 0;
-+ }
-+ return -1;
- }
-
- int
-diff -up screen/src/window.c.ipv6 screen/src/window.c
---- screen/src/window.c.ipv6 2010-11-11 03:47:46.000000000 +0100
-+++ screen/src/window.c 2011-02-03 16:30:56.900750293 +0100
-@@ -605,6 +605,13 @@ struct NewWindow *newwin;
- n = pp - wtab;
- debug1("Makewin creating %d\n", n);
-
-+#ifdef BUILTIN_TELNET
-+ if(!strcmp(nwin.args[0], "//telnet")) {
-+ type = W_TYPE_TELNET;
-+ TtyName = "telnet";
-+ }
-+ else
-+#endif
- if ((f = OpenDevice(nwin.args, nwin.lflag, &type, &TtyName)) < 0)
- return -1;
- if (type == W_TYPE_GROUP)
-@@ -766,7 +773,7 @@ struct NewWindow *newwin;
- #ifdef BUILTIN_TELNET
- if (type == W_TYPE_TELNET)
- {
-- if (TelConnect(p))
-+ if (TelOpenAndConnect(p))
- {
- FreeWindow(p);
- return -1;
-@@ -878,6 +885,13 @@ struct win *p;
- int lflag, f;
-
- lflag = nwin_default.lflag;
-+#ifdef BUILTIN_TELNET
-+ if(!strcmp(p->w_cmdargs[0], "//telnet")) {
-+ p->w_type = W_TYPE_TELNET;
-+ TtyName = "telnet";
-+ }
-+ else
-+#endif
- if ((f = OpenDevice(p->w_cmdargs, lflag, &p->w_type, &TtyName)) < 0)
- return -1;
-
-@@ -909,7 +923,7 @@ struct win *p;
- #ifdef BUILTIN_TELNET
- if (p->w_type == W_TYPE_TELNET)
- {
-- if (TelConnect(p))
-+ if (TelOpenAndConnect(p))
- return -1;
- }
- else
-@@ -1068,16 +1082,6 @@ char **namep;
- *namep = "telnet";
- return 0;
- }
--#ifdef BUILTIN_TELNET
-- if (strcmp(arg, "//telnet") == 0)
-- {
-- f = TelOpen(args + 1);
-- lflag = 0;
-- *typep = W_TYPE_TELNET;
-- *namep = "telnet";
-- }
-- else
--#endif
- if (strncmp(arg, "//", 2) == 0)
- {
- Msg(0, "Invalid argument '%s'", arg);
-diff -up screen/src/window.h.ipv6 screen/src/window.h
---- screen/src/window.h.ipv6 2010-11-11 03:47:46.000000000 +0100
-+++ screen/src/window.h 2011-02-03 16:04:35.989744687 +0100
-@@ -268,7 +268,7 @@ struct win
- struct display *w_zdisplay;
- #endif
- #ifdef BUILTIN_TELNET
-- struct sockaddr_in w_telsa;
-+ struct sockaddr_storage w_telsa;
- char w_telbuf[IOSIZE];
- int w_telbufl;
- char w_telmopts[256];
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