1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #ifndef _INET_IP_IMPL_H 27 #define _INET_IP_IMPL_H 28 29 /* 30 * IP implementation private declarations. These interfaces are 31 * used to build the IP module and are not meant to be accessed 32 * by any modules except IP itself. They are undocumented and are 33 * subject to change without notice. 34 */ 35 36 #ifdef __cplusplus 37 extern "C" { 38 #endif 39 40 #ifdef _KERNEL 41 42 #include <sys/sdt.h> 43 #include <sys/dld.h> 44 #include <inet/tunables.h> 45 46 #define IP_MOD_ID 5701 47 48 #define INET_NAME "ip" 49 50 #ifdef _BIG_ENDIAN 51 #define IP_HDR_CSUM_TTL_ADJUST 256 52 #define IP_TCP_CSUM_COMP IPPROTO_TCP 53 #define IP_UDP_CSUM_COMP IPPROTO_UDP 54 #define IP_ICMPV6_CSUM_COMP IPPROTO_ICMPV6 55 #else 56 #define IP_HDR_CSUM_TTL_ADJUST 1 57 #define IP_TCP_CSUM_COMP (IPPROTO_TCP << 8) 58 #define IP_UDP_CSUM_COMP (IPPROTO_UDP << 8) 59 #define IP_ICMPV6_CSUM_COMP (IPPROTO_ICMPV6 << 8) 60 #endif 61 62 #define TCP_CHECKSUM_OFFSET 16 63 #define TCP_CHECKSUM_SIZE 2 64 65 #define UDP_CHECKSUM_OFFSET 6 66 #define UDP_CHECKSUM_SIZE 2 67 68 #define ICMPV6_CHECKSUM_OFFSET 2 69 #define ICMPV6_CHECKSUM_SIZE 2 70 71 #define IPH_TCPH_CHECKSUMP(ipha, hlen) \ 72 ((uint16_t *)(((uchar_t *)(ipha)) + ((hlen) + TCP_CHECKSUM_OFFSET))) 73 74 #define IPH_UDPH_CHECKSUMP(ipha, hlen) \ 75 ((uint16_t *)(((uchar_t *)(ipha)) + ((hlen) + UDP_CHECKSUM_OFFSET))) 76 77 #define IPH_ICMPV6_CHECKSUMP(ipha, hlen) \ 78 ((uint16_t *)(((uchar_t *)(ipha)) + ((hlen) + ICMPV6_CHECKSUM_OFFSET))) 79 80 #define ILL_HCKSUM_CAPABLE(ill) \ 81 (((ill)->ill_capabilities & ILL_CAPAB_HCKSUM) != 0) 82 83 /* 84 * Macro to adjust a given checksum value depending on any prepended 85 * or postpended data on the packet. It expects the start offset to 86 * begin at an even boundary and that the packet consists of at most 87 * two mblks. 88 */ 89 #define IP_ADJCKSUM_PARTIAL(cksum_start, mp, mp1, len, adj) { \ 90 /* \ 91 * Prepended extraneous data; adjust checksum. \ 92 */ \ 93 if ((len) > 0) \ 94 (adj) = IP_BCSUM_PARTIAL(cksum_start, len, 0); \ 95 else \ 96 (adj) = 0; \ 97 /* \ 98 * len is now the total length of mblk(s) \ 99 */ \ 100 (len) = MBLKL(mp); \ 101 if ((mp1) == NULL) \ 102 (mp1) = (mp); \ 103 else \ 104 (len) += MBLKL(mp1); \ 105 /* \ 106 * Postpended extraneous data; adjust checksum. \ 107 */ \ 108 if (((len) = (DB_CKSUMEND(mp) - len)) > 0) { \ 109 uint32_t _pad; \ 110 \ 111 _pad = IP_BCSUM_PARTIAL((mp1)->b_wptr, len, 0); \ 112 /* \ 113 * If the postpended extraneous data was odd \ 114 * byte aligned, swap resulting checksum bytes. \ 115 */ \ 116 if ((uintptr_t)(mp1)->b_wptr & 1) \ 117 (adj) += ((_pad << 8) & 0xFFFF) | (_pad >> 8); \ 118 else \ 119 (adj) += _pad; \ 120 (adj) = ((adj) & 0xFFFF) + ((int)(adj) >> 16); \ 121 } \ 122 } 123 124 #define IS_SIMPLE_IPH(ipha) \ 125 ((ipha)->ipha_version_and_hdr_length == IP_SIMPLE_HDR_VERSION) 126 127 /* 128 * Currently supported flags for LSO. 129 */ 130 #define LSO_BASIC_TCP_IPV4 DLD_LSO_BASIC_TCP_IPV4 131 #define LSO_BASIC_TCP_IPV6 DLD_LSO_BASIC_TCP_IPV6 132 133 #define ILL_LSO_CAPABLE(ill) \ 134 (((ill)->ill_capabilities & ILL_CAPAB_LSO) != 0) 135 136 #define ILL_LSO_USABLE(ill) \ 137 (ILL_LSO_CAPABLE(ill) && \ 138 ill->ill_lso_capab != NULL) 139 140 #define ILL_LSO_TCP_IPV4_USABLE(ill) \ 141 (ILL_LSO_USABLE(ill) && \ 142 ill->ill_lso_capab->ill_lso_flags & LSO_BASIC_TCP_IPV4) 143 144 #define ILL_LSO_TCP_IPV6_USABLE(ill) \ 145 (ILL_LSO_USABLE(ill) && \ 146 ill->ill_lso_capab->ill_lso_flags & LSO_BASIC_TCP_IPV6) 147 148 #define ILL_ZCOPY_CAPABLE(ill) \ 149 (((ill)->ill_capabilities & ILL_CAPAB_ZEROCOPY) != 0) 150 151 #define ILL_ZCOPY_USABLE(ill) \ 152 (ILL_ZCOPY_CAPABLE(ill) && (ill->ill_zerocopy_capab != NULL) && \ 153 (ill->ill_zerocopy_capab->ill_zerocopy_flags != 0)) 154 155 156 /* Macro that follows definitions of flags for mac_tx() (see mac_client.h) */ 157 #define IP_DROP_ON_NO_DESC 0x01 /* Equivalent to MAC_DROP_ON_NO_DESC */ 158 159 #define ILL_DIRECT_CAPABLE(ill) \ 160 (((ill)->ill_capabilities & ILL_CAPAB_DLD_DIRECT) != 0) 161 162 /* This macro is used by the mac layer */ 163 #define MBLK_RX_FANOUT_SLOWPATH(mp, ipha) \ 164 (DB_TYPE(mp) != M_DATA || DB_REF(mp) != 1 || !OK_32PTR(ipha) || \ 165 (((uchar_t *)ipha + IP_SIMPLE_HDR_LENGTH) >= (mp)->b_wptr)) 166 167 /* 168 * In non-global zone exclusive IP stacks, data structures such as IRE 169 * entries pretend that they're in the global zone. The following 170 * macro evaluates to the real zoneid instead of a pretend 171 * GLOBAL_ZONEID. 172 */ 173 #define IP_REAL_ZONEID(zoneid, ipst) \ 174 (((zoneid) == GLOBAL_ZONEID) ? \ 175 netstackid_to_zoneid((ipst)->ips_netstack->netstack_stackid) : \ 176 (zoneid)) 177 178 extern void ill_flow_enable(void *, ip_mac_tx_cookie_t); 179 extern zoneid_t ip_get_zoneid_v4(ipaddr_t, mblk_t *, ip_recv_attr_t *, 180 zoneid_t); 181 extern zoneid_t ip_get_zoneid_v6(in6_addr_t *, mblk_t *, const ill_t *, 182 ip_recv_attr_t *, zoneid_t); 183 extern void conn_ire_revalidate(conn_t *, void *); 184 extern void ip_ire_unbind_walker(ire_t *, void *); 185 extern void ip_ire_rebind_walker(ire_t *, void *); 186 187 /* 188 * flag passed in by IP based protocols to get a private ip stream with 189 * no conn_t. Note this flag has the same value as SO_FALLBACK 190 */ 191 #define IP_HELPER_STR SO_FALLBACK 192 193 #define IP_MOD_MINPSZ 1 194 #define IP_MOD_MAXPSZ INFPSZ 195 #define IP_MOD_HIWAT 65536 196 #define IP_MOD_LOWAT 1024 197 198 #define DEV_IP "/devices/pseudo/ip@0:ip" 199 #define DEV_IP6 "/devices/pseudo/ip6@0:ip6" 200 201 #endif /* _KERNEL */ 202 203 #ifdef __cplusplus 204 } 205 #endif 206 207 #endif /* _INET_IP_IMPL_H */ 208