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Hello packets on PTP networks should have zero netmask.
This also ensures that misconfigured routers (one side ptp and one side broadcast) do not make adjacency.
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@ -225,7 +225,8 @@ ospf_hello_send(timer * timer, int poll, struct ospf_neighbor *dirn)
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pkt->netmask = ipa_mkmask(ifa->iface->addr->pxlen);
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ipa_hton(pkt->netmask);
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if (ifa->type == OSPF_IT_VLINK) pkt->netmask = IPA_NONE;
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if ((ifa->type == OSPF_IT_VLINK) || (ifa->type == OSPF_IT_PTP))
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pkt->netmask = IPA_NONE;
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pkt->helloint = ntohs(ifa->helloint);
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pkt->options = ifa->oa->opt.byte;
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pkt->priority = ifa->priority;
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