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 2009 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 45 #define IP_MOD_ID 5701 46 47 #define INET_NAME "ip" 48 49 #ifdef _BIG_ENDIAN 50 #define IP_HDR_CSUM_TTL_ADJUST 256 51 #define IP_TCP_CSUM_COMP IPPROTO_TCP 52 #define IP_UDP_CSUM_COMP IPPROTO_UDP 53 #define IP_ICMPV6_CSUM_COMP IPPROTO_ICMPV6 54 #else 55 #define IP_HDR_CSUM_TTL_ADJUST 1 56 #define IP_TCP_CSUM_COMP (IPPROTO_TCP << 8) 57 #define IP_UDP_CSUM_COMP (IPPROTO_UDP << 8) 58 #define IP_ICMPV6_CSUM_COMP (IPPROTO_ICMPV6 << 8) 59 #endif 60 61 #define TCP_CHECKSUM_OFFSET 16 62 #define TCP_CHECKSUM_SIZE 2 63 64 #define UDP_CHECKSUM_OFFSET 6 65 #define UDP_CHECKSUM_SIZE 2 66 67 #define ICMPV6_CHECKSUM_OFFSET 2 68 #define ICMPV6_CHECKSUM_SIZE 2 69 70 #define IPH_TCPH_CHECKSUMP(ipha, hlen) \ 71 ((uint16_t *)(((uchar_t *)(ipha)) + ((hlen) + TCP_CHECKSUM_OFFSET))) 72 73 #define IPH_UDPH_CHECKSUMP(ipha, hlen) \ 74 ((uint16_t *)(((uchar_t *)(ipha)) + ((hlen) + UDP_CHECKSUM_OFFSET))) 75 76 #define IPH_ICMPV6_CHECKSUMP(ipha, hlen) \ 77 ((uint16_t *)(((uchar_t *)(ipha)) + ((hlen) + ICMPV6_CHECKSUM_OFFSET))) 78 79 #define ILL_HCKSUM_CAPABLE(ill) \ 80 (((ill)->ill_capabilities & ILL_CAPAB_HCKSUM) != 0) 81 82 /* 83 * Macro to adjust a given checksum value depending on any prepended 84 * or postpended data on the packet. It expects the start offset to 85 * begin at an even boundary and that the packet consists of at most 86 * two mblks. 87 */ 88 #define IP_ADJCKSUM_PARTIAL(cksum_start, mp, mp1, len, adj) { \ 89 /* \ 90 * Prepended extraneous data; adjust checksum. \ 91 */ \ 92 if ((len) > 0) \ 93 (adj) = IP_BCSUM_PARTIAL(cksum_start, len, 0); \ 94 else \ 95 (adj) = 0; \ 96 /* \ 97 * len is now the total length of mblk(s) \ 98 */ \ 99 (len) = MBLKL(mp); \ 100 if ((mp1) == NULL) \ 101 (mp1) = (mp); \ 102 else \ 103 (len) += MBLKL(mp1); \ 104 /* \ 105 * Postpended extraneous data; adjust checksum. \ 106 */ \ 107 if (((len) = (DB_CKSUMEND(mp) - len)) > 0) { \ 108 uint32_t _pad; \ 109 \ 110 _pad = IP_BCSUM_PARTIAL((mp1)->b_wptr, len, 0); \ 111 /* \ 112 * If the postpended extraneous data was odd \ 113 * byte aligned, swap resulting checksum bytes. \ 114 */ \ 115 if ((uintptr_t)(mp1)->b_wptr & 1) \ 116 (adj) += ((_pad << 8) & 0xFFFF) | (_pad >> 8); \ 117 else \ 118 (adj) += _pad; \ 119 (adj) = ((adj) & 0xFFFF) + ((int)(adj) >> 16); \ 120 } \ 121 } 122 123 #define IS_SIMPLE_IPH(ipha) \ 124 ((ipha)->ipha_version_and_hdr_length == IP_SIMPLE_HDR_VERSION) 125 126 /* 127 * Currently supported flags for LSO. 128 */ 129 #define LSO_BASIC_TCP_IPV4 DLD_LSO_BASIC_TCP_IPV4 130 #define LSO_BASIC_TCP_IPV6 DLD_LSO_BASIC_TCP_IPV6 131 132 #define ILL_LSO_CAPABLE(ill) \ 133 (((ill)->ill_capabilities & ILL_CAPAB_LSO) != 0) 134 135 #define ILL_LSO_USABLE(ill) \ 136 (ILL_LSO_CAPABLE(ill) && \ 137 ill->ill_lso_capab != NULL) 138 139 #define ILL_LSO_TCP_IPV4_USABLE(ill) \ 140 (ILL_LSO_USABLE(ill) && \ 141 ill->ill_lso_capab->ill_lso_flags & LSO_BASIC_TCP_IPV4) 142 143 #define ILL_LSO_TCP_IPV6_USABLE(ill) \ 144 (ILL_LSO_USABLE(ill) && \ 145 ill->ill_lso_capab->ill_lso_flags & LSO_BASIC_TCP_IPV6) 146 147 #define ILL_ZCOPY_CAPABLE(ill) \ 148 (((ill)->ill_capabilities & ILL_CAPAB_ZEROCOPY) != 0) 149 150 #define ILL_ZCOPY_USABLE(ill) \ 151 (ILL_ZCOPY_CAPABLE(ill) && (ill->ill_zerocopy_capab != NULL) && \ 152 (ill->ill_zerocopy_capab->ill_zerocopy_flags != 0)) 153 154 155 /* Macro that follows definitions of flags for mac_tx() (see mac_client.h) */ 156 #define IP_DROP_ON_NO_DESC 0x01 /* Equivalent to MAC_DROP_ON_NO_DESC */ 157 158 #define ILL_DIRECT_CAPABLE(ill) \ 159 (((ill)->ill_capabilities & ILL_CAPAB_DLD_DIRECT) != 0) 160 161 /* This macro is used by the mac layer */ 162 #define MBLK_RX_FANOUT_SLOWPATH(mp, ipha) \ 163 (DB_TYPE(mp) != M_DATA || DB_REF(mp) != 1 || !OK_32PTR(ipha) || \ 164 (((uchar_t *)ipha + IP_SIMPLE_HDR_LENGTH) >= (mp)->b_wptr)) 165 166 /* 167 * In non-global zone exclusive IP stacks, data structures such as IRE 168 * entries pretend that they're in the global zone. The following 169 * macro evaluates to the real zoneid instead of a pretend 170 * GLOBAL_ZONEID. 171 */ 172 #define IP_REAL_ZONEID(zoneid, ipst) \ 173 (((zoneid) == GLOBAL_ZONEID) ? \ 174 netstackid_to_zoneid((ipst)->ips_netstack->netstack_stackid) : \ 175 (zoneid)) 176 177 extern void ill_flow_enable(void *, ip_mac_tx_cookie_t); 178 extern zoneid_t ip_get_zoneid_v4(ipaddr_t, mblk_t *, ip_recv_attr_t *, 179 zoneid_t); 180 extern zoneid_t ip_get_zoneid_v6(in6_addr_t *, mblk_t *, const ill_t *, 181 ip_recv_attr_t *, zoneid_t); 182 183 /* 184 * flag passed in by IP based protocols to get a private ip stream with 185 * no conn_t. Note this flag has the same value as SO_FALLBACK 186 */ 187 #define IP_HELPER_STR SO_FALLBACK 188 189 #define IP_MOD_MINPSZ 1 190 #define IP_MOD_MAXPSZ INFPSZ 191 #define IP_MOD_HIWAT 65536 192 #define IP_MOD_LOWAT 1024 193 194 #define DEV_IP "/devices/pseudo/ip@0:ip" 195 #define DEV_IP6 "/devices/pseudo/ip6@0:ip6" 196 197 #endif /* _KERNEL */ 198 199 #ifdef __cplusplus 200 } 201 #endif 202 203 #endif /* _INET_IP_IMPL_H */ 204