From fa620b2a7b61b2a8dab6203386a59f16c4f0aa37 Mon Sep 17 00:00:00 2001
From: Paul Thomas <thomaspu@gmail.com>
Date: Wed, 1 Oct 2008 01:47:48 +0000
Subject: [PATCH] Committed changes to add in support for pty resizing. Credit
 for this patch goes to Vincent Jaulin.

---
 include/libssh2.h |  3 ++
 src/channel.c     | 79 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 82 insertions(+)

diff --git a/include/libssh2.h b/include/libssh2.h
index 8f5ef6fd..5c553d4e 100644
--- a/include/libssh2.h
+++ b/include/libssh2.h
@@ -393,6 +393,9 @@ LIBSSH2_API int libssh2_channel_setenv_ex(LIBSSH2_CHANNEL *channel, const char *
 LIBSSH2_API int libssh2_channel_request_pty_ex(LIBSSH2_CHANNEL *channel, const char *term, unsigned int term_len, const char *modes, unsigned int modes_len, int width, int height, int width_px, int height_px);
 #define libssh2_channel_request_pty(channel, term)  libssh2_channel_request_pty_ex((channel), (term), strlen(term), NULL, 0, LIBSSH2_TERM_WIDTH, LIBSSH2_TERM_HEIGHT, LIBSSH2_TERM_WIDTH_PX, LIBSSH2_TERM_HEIGHT_PX)
 
+LIBSSH2_API int libssh2_channel_request_pty_size_ex(LIBSSH2_CHANNEL * channel, int width, int height, int width_px, int height_px);
+#define libssh2_channel_request_pty_size(channel, width, height) libssh2_channel_request_pty_size_ex( (channel), (width), (height), 0, 0)
+
 LIBSSH2_API int libssh2_channel_x11_req_ex(LIBSSH2_CHANNEL *channel, int single_connection, const char *auth_proto, const char *auth_cookie, int screen_number);
 #define libssh2_channel_x11_req(channel, screen_number) libssh2_channel_x11_req_ex((channel), 0, NULL, NULL, (screen_number))
 
diff --git a/src/channel.c b/src/channel.c
index 09b3c98c..28daba19 100644
--- a/src/channel.c
+++ b/src/channel.c
@@ -930,6 +930,85 @@ libssh2_channel_request_pty_ex(LIBSSH2_CHANNEL * channel, const char *term,
 
 /* }}} */
 
+LIBSSH2_API int
+libssh2_channel_request_pty_size_ex(LIBSSH2_CHANNEL * channel, int width,
+								int height, int width_px, int height_px)
+{
+  LIBSSH2_SESSION *session = channel->session;
+  unsigned char *s, *data;
+  static const unsigned char reply_codes[3] =
+      { SSH_MSG_CHANNEL_SUCCESS, SSH_MSG_CHANNEL_FAILURE, 0 };
+  unsigned long data_len;
+  int rc;
+
+  if (channel->reqPTY_state == libssh2_NB_state_idle) {
+      channel->reqPTY_packet_len = 39;
+
+      /* Zero the whole thing out */
+      memset(&channel->reqPTY_packet_requirev_state, 0,
+             sizeof(channel->reqPTY_packet_requirev_state));
+
+      _libssh2_debug(session, LIBSSH2_DBG_CONN,
+                     "changing tty size on channel %lu/%lu",
+                     channel->local.id,
+                     channel->remote.id);
+
+      s = channel->reqPTY_packet =
+          LIBSSH2_ALLOC(session, channel->reqPTY_packet_len);
+      if (!channel->reqPTY_packet) {
+          libssh2_error(session, LIBSSH2_ERROR_ALLOC,
+                        "Unable to allocate memory for pty-request", 0);
+          return -1;
+      }
+
+      *(s++) = SSH_MSG_CHANNEL_REQUEST;
+      libssh2_htonu32(s, channel->remote.id);
+      s += 4;
+      libssh2_htonu32(s, sizeof("window-change") - 1);
+      s += 4;
+      memcpy(s, "window-change", sizeof("window-change") - 1);
+      s += sizeof("window-change") - 1;
+
+      *(s++) = 0x00; /* Don't reply */
+            libssh2_htonu32(s, width);
+      s += 4;
+      libssh2_htonu32(s, height);
+      s += 4;
+      libssh2_htonu32(s, width_px);
+      s += 4;
+      libssh2_htonu32(s, height_px);
+      s += 4;
+
+      channel->reqPTY_state = libssh2_NB_state_created;
+  }
+
+  if (channel->reqPTY_state == libssh2_NB_state_created) {
+      rc = libssh2_packet_write(session, channel->reqPTY_packet,
+                                channel->reqPTY_packet_len);
+      if (rc == PACKET_EAGAIN) {
+          return PACKET_EAGAIN;
+      } else if (rc) {
+          libssh2_error(session, LIBSSH2_ERROR_SOCKET_SEND,
+                        "Unable to send window-change packet", 0);
+          LIBSSH2_FREE(session, channel->reqPTY_packet);
+          channel->reqPTY_packet = NULL;
+          channel->reqPTY_state = libssh2_NB_state_idle;
+          return -1;
+      }
+      LIBSSH2_FREE(session, channel->reqPTY_packet);
+      channel->reqPTY_packet = NULL;
+
+      libssh2_htonu32(channel->reqPTY_local_channel, channel->local.id);
+
+      channel->reqPTY_state = libssh2_NB_state_sent;
+      return 0;
+  }
+
+
+  channel->reqPTY_state = libssh2_NB_state_idle;
+  return -1;
+}
+
 /* Keep this an even number */
 #define LIBSSH2_X11_RANDOM_COOKIE_LEN       32