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annotate usr/src/lib/libilb/common/libilb_impl.h @ 10946:324bab2b3370

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PSARC 2008/575 ILB: Integrated L3/L4 Load balancer 6882718 in-kernel simple L3/L4 load balancing service should be provided in Solaris 6884202 ipobs_hook() in ip_input() invalidates DB_REF assumption
author Sangeeta Misra <Sangeeta.Misra@Sun.COM>
date Tue, 03 Nov 2009 23:15:19 -0800
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10946
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1 /*
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2 * CDDL HEADER START
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3 *
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4 * The contents of this file are subject to the terms of the
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5 * Common Development and Distribution License (the "License").
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6 * You may not use this file except in compliance with the License.
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7 *
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8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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9 * or http://www.opensolaris.org/os/licensing.
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10 * See the License for the specific language governing permissions
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11 * and limitations under the License.
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12 *
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13 * When distributing Covered Code, include this CDDL HEADER in each
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14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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15 * If applicable, add the following below this CDDL HEADER, with the
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16 * fields enclosed by brackets "[]" replaced with your own identifying
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17 * information: Portions Copyright [yyyy] [name of copyright owner]
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18 *
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19 * CDDL HEADER END
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20 */
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21
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22 /*
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23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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24 * Use is subject to license terms.
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25 */
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26
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27 #ifndef _LIBILB_IMPL_H
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28 #define _LIBILB_IMPL_H
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29
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30 #ifdef __cplusplus
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31 extern "C" {
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32 #endif
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33
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34 #include <sys/types.h>
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35 #include <sys/socket.h>
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36 #include <sys/note.h>
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37 #include <netinet/in.h>
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38 #include <netdb.h>
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39 #include <net/if.h>
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40 #include <inet/ilb.h>
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41 #include <libilb.h>
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42 #include <thread.h>
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43 #include <synch.h>
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44
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45 #if !defined max
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46 #define max(a, b) ((a) > (b) ? (a) : (b))
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47 #endif
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48
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49 /* The UNIX domain socket path to talk to ilbd. */
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50 #define SOCKET_PATH "/var/run/daemon/ilb_sock"
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51
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52 /* The max message size for communicating with ilbd */
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53 #define ILBD_MSG_SIZE 102400
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54
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55 /*
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56 * moral equivalent of ntohl for IPv6 addresses, MSB and LSB (64 bit each),
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57 * assign to uint64_t variables
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58 */
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59 #define INV6_N2H_MSB64(addr) \
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60 (((uint64_t)ntohl((addr)->_S6_un._S6_u32[0]) << 32) + \
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61 (ntohl((addr)->_S6_un._S6_u32[1])))
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62
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63 #define INV6_N2H_LSB64(addr) \
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64 (((uint64_t)ntohl((addr)->_S6_un._S6_u32[2]) << 32) + \
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65 (ntohl((addr)->_S6_un._S6_u32[3])))
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66
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67 /*
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68 * moral equiv. of htonl of MSB and LSB 64-bit portions to an IPv6 address
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69 */
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70 #define INV6_H2N_MSB64(addr, msb) \
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71 (addr)->_S6_un._S6_u32[0] = htonl((msb) >> 32); \
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72 (addr)->_S6_un._S6_u32[1] = htonl((msb) & 0xffffffff)
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73
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74 #define INV6_H2N_LSB64(addr, lsb) \
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75 (addr)->_S6_un._S6_u32[2] = htonl((lsb) >> 32); \
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76 (addr)->_S6_un._S6_u32[3] = htonl((lsb) & 0xffffffff)
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77
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78 #define IP_COPY_CLI_2_IMPL(_e, _i) \
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79 bzero(_i, sizeof (*(_i))); \
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80 if ((_e)->ia_af == AF_INET6) \
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81 (void) memcpy((_i), &(_e)->ia_v6, sizeof (*(_i))); \
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82 else \
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83 IN6_INADDR_TO_V4MAPPED(&(_e)->ia_v4, (_i))
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84
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85 #define IP_COPY_IMPL_2_CLI(_i, _e) \
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86 do { \
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87 bzero(_e, sizeof (*(_e))); \
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88 if (IN6_IS_ADDR_V4MAPPED(_i)) { \
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89 (_e)->ia_af = AF_INET; \
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90 IN6_V4MAPPED_TO_INADDR((_i), &(_e)->ia_v4); \
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91 } else { \
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92 (_e)->ia_af = AF_INET6; \
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93 (void) memcpy(&(_e)->ia_v6, (_i), \
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94 sizeof ((_e)->ia_v6)); \
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95 } \
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96 _NOTE(CONSTCOND) \
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97 } while (0)
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98
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99 #define GET_AF(_a) IN6_IS_ADDR_V4MAPPED(_a)?AF_INET:AF_INET6
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100 #define IS_AF_VALID(_af) (_af == AF_INET || _af == AF_INET6)
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101
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102 typedef enum {
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103 ILBD_BAD_CMD = 0,
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104 /* servergroup commands */
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105 ILBD_CREATE_SERVERGROUP,
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106 ILBD_ADD_SERVER_TO_GROUP,
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107 ILBD_REM_SERVER_FROM_GROUP,
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108 ILBD_ENABLE_SERVER,
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109 ILBD_DISABLE_SERVER,
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110 ILBD_DESTROY_SERVERGROUP,
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111 ILBD_RETRIEVE_SG_NAMES, /* names of all SGs registered */
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112 ILBD_RETRIEVE_SG_HOSTS, /* all hosts for a given SG (hndl) */
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113 ILBD_SRV_ADDR2ID, /* fill in serverID for given address */
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114 ILBD_SRV_ID2ADDR, /* fill in address from given serverID */
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115 /* rule commands */
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116 ILBD_CREATE_RULE,
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117 ILBD_DESTROY_RULE,
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118 ILBD_ENABLE_RULE,
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119 ILBD_DISABLE_RULE,
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120 ILBD_RETRIEVE_RULE_NAMES,
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121 ILBD_RETRIEVE_RULE,
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122
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123 ILBD_CREATE_HC,
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124 ILBD_DESTROY_HC,
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125 ILBD_GET_HC_INFO,
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126 ILBD_GET_HC_SRVS,
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127 ILBD_GET_HC_RULES,
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128 ILBD_RETRIEVE_HC_NAMES,
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129
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130 ILBD_SHOW_NAT, /* list the NAT table */
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131 ILBD_SHOW_PERSIST, /* list the sticky table */
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132
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133 ILBD_CMD_OK, /* Requested operation succeeds. */
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134 ILBD_CMD_ERROR /* Rquested operation fails. */
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135 } ilbd_cmd_t;
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136
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137 typedef struct sg_srv {
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138 int32_t sgs_flags; /* enabled, dis- */
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139 struct in6_addr sgs_addr;
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140 int32_t sgs_minport;
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141 int32_t sgs_maxport;
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142 int32_t sgs_id; /* numerical part of srvID */
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143 char sgs_srvID[ILB_NAMESZ]; /* "name" given to server */
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144 } ilb_sg_srv_t;
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145
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146 typedef struct sg_info {
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147 int32_t sg_flags;
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148 char sg_name[ILB_SGNAME_SZ];
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149 int32_t sg_srvcount;
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150 ilb_sg_srv_t sg_servers[];
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151 } ilb_sg_info_t;
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152
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153 typedef char ilbd_name_t[ILB_NAMESZ];
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154
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155 typedef struct ilbd_namelist {
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156 int32_t ilbl_flags;
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157 int32_t ilbl_count;
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158 ilbd_name_t ilbl_name[];
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159 } ilbd_namelist_t;
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160
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161 #define ILBL_NAME_OFFSET (offsetof(ilbd_namelist_t, ilbl_name))
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162
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163 typedef struct rule_info {
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164 int32_t rl_flags;
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165 char rl_name[ILB_NAMESZ];
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166 struct in6_addr rl_vip;
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167 uint16_t rl_proto;
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168 uint16_t rl_ipversion;
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169 int32_t rl_minport;
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170 int32_t rl_maxport;
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171 ilb_algo_t rl_algo;
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172 ilb_topo_t rl_topo;
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173 struct in6_addr rl_nat_src_start;
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174 struct in6_addr rl_nat_src_end;
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175 struct in6_addr rl_stickymask;
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176 uint32_t rl_conndrain;
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177 uint32_t rl_nat_timeout;
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178 uint32_t rl_sticky_timeout;
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179 in_port_t rl_hcport;
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180 ilb_hcp_flags_t rl_hcpflag;
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181 char rl_sgname[ILB_SGNAME_SZ];
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182 char rl_hcname[ILB_NAMESZ];
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183 } ilb_rule_info_t;
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184
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185 /*
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186 * Struct to represent show NAT request and reply.
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187 *
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188 * sn_num: (request) indicates the number of entries wanted;
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189 * (reply) the number of entries returned;
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190 * sn_data: NAT/persist able entries (is uint32_t aligned).
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191 */
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192 typedef struct {
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193 uint32_t sn_num;
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194 uint32_t sn_data[];
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195 } ilb_show_info_t;
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196
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197 /*
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198 * Struct to represent the set of servers associated with a hc object.
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199 *
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200 * rs_num_srvs: number of servers in this struct.
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201 * rs_srvs: array of servers.
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202 */
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203 typedef struct {
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204 uint32_t rs_num_srvs;
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205 ilb_hc_srv_t rs_srvs[];
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206 } ilb_hc_rule_srv_t;
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207
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208 typedef struct ilb_handle_impl {
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209 mutex_t h_lock;
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210 cond_t h_cv;
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211 boolean_t h_busy;
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212 boolean_t h_valid;
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213 boolean_t h_closing;
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214 uint32_t h_waiter;
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215 int h_socket;
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216 ilb_status_t h_error; /* ... that caused invalidation */
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217 } ilb_handle_impl_t;
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218
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219 /*
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220 * Communication flags used in ilb_comm_t.
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221 *
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222 * ILB_COMM_END: end of communication
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223 */
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224 #define ILB_COMM_END 0x1
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225
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226 /*
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227 * The message structure used to communicate with ilbd.
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228 *
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229 * ic_cmd: the message type.
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230 * ic_flags: communication flags
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231 * ic_data: message data (is uint32_t aligned).
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232 */
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233 typedef struct {
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234 ilbd_cmd_t ic_cmd;
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235 int32_t ic_flags;
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236 uint32_t ic_data[];
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237 } ilb_comm_t;
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238
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239 ilb_status_t i_check_ip_range(ilb_ip_addr_t *, ilb_ip_addr_t *);
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240 ilb_status_t i_ilb_do_comm(ilb_handle_t, ilb_comm_t *, size_t, ilb_comm_t *,
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241 size_t *);
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242 void i_ilb_close_comm(ilb_handle_t);
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243 struct in6_addr i_next_ip_addr(struct in6_addr *, int);
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244
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245 ilb_status_t i_ilb_retrieve_rule_names(ilb_handle_t, ilb_comm_t **,
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246 size_t *);
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247 ilb_comm_t *i_ilb_alloc_req(ilbd_cmd_t, size_t *);
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248
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249 #ifdef __cplusplus
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250 }
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251 #endif
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252
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253 #endif /* _LIBILB_IMPL_H */