Use m_copyback() function to write delayed checksum when it isn't located
in the first mbuf of the chain. MFC after: 1 week
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=334707
@ -199,18 +199,10 @@ in6_delayed_cksum(struct mbuf *m, uint32_t plen, u_short offset)
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csum = 0xffff;
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offset += m->m_pkthdr.csum_data; /* checksum offset */
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if (offset + sizeof(u_short) > m->m_len) {
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printf("%s: delayed m_pullup, m->len: %d plen %u off %u "
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"csum_flags=%b\n", __func__, m->m_len, plen, offset,
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(int)m->m_pkthdr.csum_flags, CSUM_BITS);
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/*
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* XXX this should not happen, but if it does, the correct
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* behavior may be to insert the checksum in the appropriate
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* next mbuf in the chain.
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*/
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return;
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}
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*(u_short *)(m->m_data + offset) = csum;
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if (offset + sizeof(csum) > m->m_len)
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m_copyback(m, offset, sizeof(csum), (caddr_t)&csum);
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else
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*(u_short *)mtodo(m, offset) = csum;
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}
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int
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