Commit 0963716b3fd30a0900c22884bcd52f04d556fb67
2014-07-02T12:49:51
ssh: libssh2_channel_write() behaves like send() When the stream writing function was written, it assume that libssh2_channel_write() would always write all of the data to the wire. This is only true for the first 32k of data, which it tries to fit into one ssh packet. Since it can perform short writes, call it in a loop like we do for send(), advancing the buffer offset.
diff --git a/src/transports/ssh.c b/src/transports/ssh.c
index b403727..79a632b 100644
--- a/src/transports/ssh.c
+++ b/src/transports/ssh.c
@@ -132,11 +132,22 @@ static int ssh_stream_write(
size_t len)
{
ssh_stream *s = (ssh_stream *)stream;
+ size_t off = 0;
+ ssize_t ret = 0;
if (!s->sent_command && send_command(s) < 0)
return -1;
- if (libssh2_channel_write(s->channel, buffer, len) < LIBSSH2_ERROR_NONE) {
+ do {
+ ret = libssh2_channel_write(s->channel, buffer + off, len - off);
+ if (ret < 0)
+ break;
+
+ off += ret;
+
+ } while (off < len);
+
+ if (ret < 0) {
ssh_error(s->session, "SSH could not write data");
return -1;
}