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Use stream_read() to read all 12 bytes of the RFB client version.

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read() can return a short read, whereas stream_read() waits until the
full version string is read.

Submitted by:	Ka Ho Ng <khng300_gmail.com>
Reviewed by:	grehan
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D23591
This commit is contained in:
John Baldwin 2020-02-27 16:51:41 +00:00
parent 6b72948d73
commit 98ee12e64e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=358394
1 changed files with 2 additions and 1 deletions
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3
usr.sbin/bhyve/rfb.c
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@ -76,6 +76,7 @@ static int rfb_debug = 0;
#define DPRINTF(params) if (rfb_debug) PRINTLN params
#define WPRINTF(params) PRINTLN params
#define VERSION_LENGTH 12
#define AUTH_LENGTH 16
#define PASSWD_LENGTH 8
@ -769,7 +770,7 @@ rfb_handle(struct rfb_softc *rc, int cfd)
stream_write(cfd, vbuf, strlen(vbuf));
/* 1b. Read client version */
len = read(cfd, buf, sizeof(buf));
len = stream_read(cfd, buf, VERSION_LENGTH);
/* 2a. Send security type */
buf[0] = 1;