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tp->advmss must not be zero, otherwise the kernel maybe crash. #9

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tp->advmss must not be zero, otherwise the kernel maybe crash. #9

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3 changes: 3 additions & 0 deletions forge_socket.c
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Original file line number Diff line number Diff line change
Expand Up @@ -233,6 +233,9 @@ int forge_setsockopt(struct sock *sk, int level, int optname,
if (tp->rx_opt.user_mss && tp->rx_opt.user_mss < tp->advmss)
tp->advmss = tp->rx_opt.user_mss;

if (tp->advmss == 0)
tp->advmss = st.mss_clamp;

/* from inet_csk_forge: */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 33)
inet_sk(sk)->dport = st.dport;
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