Fixes a bug in OSPF on NBMA interfaces.
A very tricky bug. OSPF on NBMA interfaces probably never really worked. When a packet was sent to multiple destinations, the checksum was calculated multiple times from a packet with already filled checksum field (from previous calculation). Therefore, many packets were sent with an invalid checksum.
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@ -76,6 +76,7 @@ ospf_pkt_finalize(struct ospf_iface *ifa, struct ospf_packet *pkt)
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}
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password_cpy(pkt->u.password, passwd->password, sizeof(union ospf_auth));
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case OSPF_AUTH_NONE:
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pkt->checksum = 0;
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pkt->checksum = ipsum_calculate(pkt, sizeof(struct ospf_packet) -
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sizeof(union ospf_auth), (pkt + 1),
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ntohs(pkt->length) -
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