2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * CDDL HEADER START
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2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * Use is subject to license terms.
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * DL_IPV6 MAC Type plugin for the Nemo mac module
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy "IPv6 tunneling MAC plugin"
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roystatic struct modlinkage mac_ipv6_modlinkage = {
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy if ((mtrp = mactype_alloc(MACTYPE_VERSION)) == NULL)
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy if ((err = mod_install(&mac_ipv6_modlinkage)) != 0)
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy (void) mactype_unregister(MAC_PLUGIN_IDENT_IPV6);
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy if ((err = mactype_unregister(MAC_PLUGIN_IDENT_IPV6)) != 0)
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy return (mod_info(&mac_ipv6_modlinkage, modinfop));
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * MAC Type plugin operations
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy/* ARGSUSED */
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roymac_ipv6_unicst_verify(const void *addr, void *pdata)
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * Build an IPv6 link-layer header for tunneling. If provided, the
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * template header provided by the driver supplies the traffic class, flow
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * label, hop limit, and potential options. The template's payload length
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * must either be 0 if there are no extension headers, or reflect the size
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * of the extension headers if present. The template's next header value
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * must either be IPPROTO_NONE if no extension headers are present, or
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * reflect the type of extension header that follows (the same is true for
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * the field values of the extension headers themselves.)
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy/* ARGSUSED */
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roymac_ipv6_header(const void *saddr, const void *daddr, uint32_t sap, void *pdata,
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy hdr_len = sizeof (ip6_t) + tmpl_ip6hp->ip6_plen;
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy if ((mp = allocb(hdr_len + extra_len, BPRI_HI)) == NULL)
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy ip6_dest_t *hdrptr = (ip6_dest_t *)(ip6hp + 1);
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy bcopy(saddr, &(ip6hp->ip6_src), sizeof (in6_addr_t));
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy bcopy(daddr, &(ip6hp->ip6_dst), sizeof (in6_addr_t));
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy/* ARGSUSED */
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roymac_ipv6_header_info(mblk_t *mp, void *pdata, mac_header_info_t *hdr_info)
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * IPv6 tunnels don't have a concept of link-layer multicast since
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * they have fixed unicast endpoints.
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy if (mac_ipv6_unicst_verify(&ip6hp->ip6_dst, NULL) != 0)
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy while (nexthdr != IPPROTO_ENCAP && nexthdr != IPPROTO_IPV6) {
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy ip6_dest_t *exthdrptr = (ip6_dest_t *)whereptr;
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy hdr_info->mhi_hdrsize = whereptr - mp->b_rptr;
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy hdr_info->mhi_daddr = (const uint8_t *)&(ip6hp->ip6_dst);
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy hdr_info->mhi_saddr = (const uint8_t *)&(ip6hp->ip6_src);
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy hdr_info->mhi_bindsap = hdr_info->mhi_origsap = nexthdr;
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * This plugin's MAC plugin data is a template IPv6 header followed by
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * optional extension headers. The chain of headers must be terminated by
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * a header with a next header value of IPPROTO_NONE. The payload length
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * of the IPv6 header must be 0 if there are no extension headers, or must
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * reflect the total size of extension headers present.
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roymac_ipv6_pdata_verify(void *pdata, size_t pdata_size)
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * Since the plugin does not require plugin data, it is acceptable
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * for drivers to pass in NULL plugin data as long as the plugin
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * data size is consistent.
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy return (pdata_size == 0);
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy /* First verify that we have enough data to hold an IPv6 header. */
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy /* Make sure that pdata_size is consistent with the payload length. */
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy if (pdata_size != sizeof (ip6_t) + ip6hp->ip6_plen)
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * Make sure that the header chain is terminated by a header with a
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy * next header value of IPPROTO_NONE.
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy while (nexthdr != IPPROTO_NONE && whereptr < endptr) {
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy /* make sure we're pointing at a complete header */
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy return (nexthdr == IPPROTO_NONE && whereptr == endptr);
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy mac_ipv4_multicst_verify, /* neither plugin supports multicast */
2b24ab6b3865caeede9eeb9db6b83e1d89dcd1eaSebastien Roy mac_ipv4_sap_verify, /* same set of legal SAP values */