diff options
Diffstat (limited to 'net/sctp/ipv6.c')
| -rw-r--r-- | net/sctp/ipv6.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c index a2f4d4d51593..a238d6834b33 100644 --- a/net/sctp/ipv6.c +++ b/net/sctp/ipv6.c @@ -818,7 +818,7 @@ static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) return 1; /* v4-mapped-v6 addresses */ case AF_INET: - if (!__ipv6_only_sock(sctp_opt2sk(sp)) && sp->v4mapped) + if (!__ipv6_only_sock(sctp_opt2sk(sp))) return 1; default: return 0; @@ -840,6 +840,11 @@ static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, if (!af1 || !af2) return 0; + + /* If the socket is IPv6 only, v4 addrs will not match */ + if (__ipv6_only_sock(sctp_opt2sk(opt)) && af1 != af2) + return 0; + /* Today, wildcard AF_INET/AF_INET6. */ if (sctp_is_any(addr1) || sctp_is_any(addr2)) return 1; @@ -876,7 +881,11 @@ static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) return 0; } dev_put(dev); + } else if (type == IPV6_ADDR_MAPPED) { + if (!opt->v4mapped) + return 0; } + af = opt->pf->af; } return af->available(addr, opt); @@ -919,9 +928,12 @@ static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, __be16 *types) { - types[0] = SCTP_PARAM_IPV4_ADDRESS; - types[1] = SCTP_PARAM_IPV6_ADDRESS; - return 2; + types[0] = SCTP_PARAM_IPV6_ADDRESS; + if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) { + types[1] = SCTP_PARAM_IPV4_ADDRESS; + return 2; + } + return 1; } static const struct proto_ops inet6_seqpacket_ops = { |