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[Qemu-devel] [PATCH 1/1] Fix wrong mss bug.


From: Tao Wu
Subject: [Qemu-devel] [PATCH 1/1] Fix wrong mss bug.
Date: Thu, 20 Apr 2017 12:36:16 -0700

This bug was introduced by https://github.com/qemu/qemu/commit/98c6305

Signed-off-by: Tao Wu <address@hidden>
---
 slirp/tcp_input.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/slirp/tcp_input.c b/slirp/tcp_input.c
index edb98f06f3..07bcbdb2dd 100644
--- a/slirp/tcp_input.c
+++ b/slirp/tcp_input.c
@@ -1587,11 +1587,11 @@ tcp_mss(struct tcpcb *tp, u_int offer)
        switch (so->so_ffamily) {
        case AF_INET:
             mss = MIN(IF_MTU, IF_MRU) - sizeof(struct tcphdr)
-                                     + sizeof(struct ip);
+                                     - sizeof(struct ip);
            break;
        case AF_INET6:
             mss = MIN(IF_MTU, IF_MRU) - sizeof(struct tcphdr)
-                                     + sizeof(struct ip6);
+                                     - sizeof(struct ip6);
            break;
        default:
            g_assert_not_reached();
-- 
2.12.2.816.g2cccc81164-goog




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