Alexis Murzeau : wpcap: Handle negative count for pcap_dispatch and pcap_loop.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 2cc573aef98c082ce1c934750b4e448cd1070d9c
URL:    https://gitlab.winehq.org/wine/wine/-/commit/2cc573aef98c082ce1c934750b4e448...

Author: Alexis Murzeau <amubtdx(a)gmail.com>
Date:   Wed Aug 30 09:51:29 2023 +0000

wpcap: Handle negative count for pcap_dispatch and pcap_loop.

According to WinPcap documentation of `pcap_dispatch`
(https://www.winpcap.org/docs/docs_41b5/html/group__wpcapfunc.html#g60ce104cd...):
> A cnt of -1 processes all the packets received in one buffer when
> reading a live capture, or all the packets in the file when reading a
> ``savefile''

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55487
Signed-off-by: Alexis Murzeau <amubtdx(a)gmail.com>

---

 dlls/wpcap/wpcap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/wpcap/wpcap.c b/dlls/wpcap/wpcap.c
index 8c304ce66a4..f96e7098ae5 100644
--- a/dlls/wpcap/wpcap.c
+++ b/dlls/wpcap/wpcap.c
@@ -967,7 +967,7 @@ int CDECL pcap_dispatch( struct pcap *pcap, int count,
 
     TRACE( "%p, %d, %p, %p\n", pcap, count, callback, user );
 
-    while (processed < count)
+    while (count <= 0 || processed < count)
     {
         struct pcap_pkthdr_win32 *hdr = NULL;
         const unsigned char *data = NULL;
@@ -1000,7 +1000,7 @@ int CDECL pcap_loop( struct pcap *pcap, int count,
 
     TRACE( "%p, %d, %p, %p\n", pcap, count, callback, user );
 
-    while (processed < count)
+    while (count <= 0 || processed < count)
     {
         struct pcap_pkthdr_win32 *hdr = NULL;
         const unsigned char *data = NULL;