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31 lines
897 B
31 lines
897 B
3 years ago
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From c9f314f6e315a5518432761fea864196a290f799 Mon Sep 17 00:00:00 2001
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From: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
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Date: Thu, 17 Jun 2021 18:01:32 +0900
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Subject: [PATCH] Fix "DHCP broken in libslirp v4.6.0"
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Fix issue 48
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Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
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---
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src/bootp.c | 4 +++-
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1 file changed, 3 insertions(+), 1 deletion(-)
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diff --git a/src/bootp.c b/src/bootp.c
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index cafa1eb..0a35873 100644
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--- a/src/bootp.c
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+++ b/src/bootp.c
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@@ -359,7 +359,9 @@ static void bootp_reply(Slirp *slirp,
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daddr.sin_addr.s_addr = 0xffffffffu;
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- m->m_len = sizeof(struct bootp_t) - sizeof(struct ip) - sizeof(struct udphdr);
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+ assert ((q - rbp->bp_vend + 1) <= DHCP_OPT_LEN);
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+
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+ m->m_len = sizeof(struct bootp_t) + (q - rbp->bp_vend + 1) - sizeof(struct ip) - sizeof(struct udphdr);
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udp_output(NULL, m, &saddr, &daddr, IPTOS_LOWDELAY);
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}
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--
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2.29.0
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