Take source and destination address into account when determining
the scope. This fixes a problem when a client with a global address connects to a server with a private address. Thanks to Irene Ruengeler in helping me to find the issue. MFC after: 3 days
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@ -5612,7 +5612,8 @@ sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
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stc.laddr_type = SCTP_IPV4_ADDRESS;
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/* scope_id is only for v6 */
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stc.scope_id = 0;
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if (IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) {
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if ((IN4_ISPRIVATE_ADDRESS(&src4->sin_addr)) ||
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(IN4_ISPRIVATE_ADDRESS(&dst4->sin_addr))) {
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stc.ipv4_scope = 1;
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}
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/* Must use the address in this case */
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@ -5636,16 +5637,18 @@ sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
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stc.local_scope = 0;
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stc.site_scope = 1;
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stc.ipv4_scope = 1;
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} else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr)) {
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} else if (IN6_IS_ADDR_LINKLOCAL(&src6->sin6_addr) ||
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IN6_IS_ADDR_LINKLOCAL(&dst6->sin6_addr)) {
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/*
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* If the new destination is a
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* LINK_LOCAL we must have common
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* both site and local scope. Don't
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* set local scope though since we
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* must depend on the source to be
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* added implicitly. We cannot
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* assure just because we share one
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* link that all links are common.
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* If the new destination or source
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* is a LINK_LOCAL we must have
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* common both site and local scope.
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* Don't set local scope though
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* since we must depend on the
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* source to be added implicitly. We
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* cannot assure just because we
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* share one link that all links are
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* common.
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*/
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stc.local_scope = 0;
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stc.site_scope = 1;
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@ -5661,11 +5664,12 @@ sctp_send_initiate_ack(struct sctp_inpcb *inp, struct sctp_tcb *stcb,
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* pull out the scope_id from
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* incoming pkt
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*/
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} else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr)) {
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} else if (IN6_IS_ADDR_SITELOCAL(&src6->sin6_addr) ||
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IN6_IS_ADDR_SITELOCAL(&dst6->sin6_addr)) {
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/*
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* If the new destination is
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* SITE_LOCAL then we must have site
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* scope in common.
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* If the new destination or source
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* is SITE_LOCAL then we must have
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* site scope in common.
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*/
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stc.site_scope = 1;
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}
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