FreeBSD Bugzilla – Attachment 174350 Details for
Bug 212283
oversized IP datagrams on raw socket with IP_RAWOUTPUT hang network interface drivers
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[patch]
Proposed patch (untested)
ip_output.diff (text/plain), 883 bytes, created by
Andrey V. Elsukov
on 2016-09-03 18:05:36 UTC
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Description:
Proposed patch (untested)
Filename:
MIME Type:
Creator:
Andrey V. Elsukov
Created:
2016-09-03 18:05:36 UTC
Size:
883 bytes
patch
obsolete
>Index: sys/netinet/ip_output.c >=================================================================== >--- sys/netinet/ip_output.c (revision 305356) >+++ sys/netinet/ip_output.c (working copy) >@@ -270,6 +270,9 @@ > } else { > /* Header already set, fetch hlen from there */ > hlen = ip->ip_hl << 2; >+ /* Use actual data length for RAW output */ >+ if (flag & IP_RAWOUTPUT) >+ ip_len = m->m_pkthdr.len; > } > > /* >@@ -663,8 +666,12 @@ > goto done; > } > >- /* Balk when DF bit is set or the interface didn't support TSO. */ >- if ((ip_off & IP_DF) || (m->m_pkthdr.csum_flags & CSUM_TSO)) { >+ /* >+ * Balk when DF bit is set or the interface didn't support TSO. >+ * For RAW output user must do IP fragmentation by self. >+ */ >+ if ((ip_off & IP_DF) || (m->m_pkthdr.csum_flags & CSUM_TSO) || >+ (flags & IP_RAWOUTPUT)) { > error = EMSGSIZE; > IPSTAT_INC(ips_cantfrag); > goto bad;
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