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 (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. 23 */ 24 25 #ifndef _UDP_IMPL_H 26 #define _UDP_IMPL_H 27 28 /* 29 * UDP implementation private declarations. These interfaces are 30 * used to build the IP module and are not meant to be accessed 31 * by any modules except IP itself. They are undocumented and are 32 * subject to change without notice. 33 */ 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 #ifdef _KERNEL 40 41 #include <sys/int_types.h> 42 #include <sys/netstack.h> 43 44 #include <netinet/in.h> 45 #include <netinet/ip6.h> 46 47 #include <inet/common.h> 48 #include <inet/ip.h> 49 #include <inet/optcom.h> 50 #include <inet/tunables.h> 51 52 #define UDP_MOD_ID 5607 53 54 /* 55 * Bind hash list size and hash function. It has to be a power of 2 for 56 * hashing. 57 */ 58 #define UDP_BIND_FANOUT_SIZE 512 59 #define UDP_BIND_HASH(lport, size) \ 60 ((ntohs((uint16_t)lport)) & (size - 1)) 61 62 /* UDP bind fanout hash structure. */ 63 typedef struct udp_fanout_s { 64 struct udp_s *uf_udp; 65 kmutex_t uf_lock; 66 #if defined(_LP64) || defined(_I32LPx) 67 char uf_pad[48]; 68 #else 69 char uf_pad[56]; 70 #endif 71 } udp_fanout_t; 72 73 /* Kstats */ 74 typedef struct udp_stat { /* Class "net" kstats */ 75 kstat_named_t udp_sock_fallback; 76 kstat_named_t udp_out_opt; 77 kstat_named_t udp_out_err_notconn; 78 kstat_named_t udp_out_err_output; 79 kstat_named_t udp_out_err_tudr; 80 #ifdef DEBUG 81 kstat_named_t udp_data_conn; 82 kstat_named_t udp_data_notconn; 83 kstat_named_t udp_out_lastdst; 84 kstat_named_t udp_out_diffdst; 85 kstat_named_t udp_out_ipv6; 86 kstat_named_t udp_out_mapped; 87 kstat_named_t udp_out_ipv4; 88 #endif 89 90 } udp_stat_t; 91 92 #define UDP_NUM_EPRIV_PORTS 64 93 94 /* Default buffer size and flow control wake up threshold. */ 95 #define UDP_RECV_HIWATER (56 * 1024) 96 #define UDP_RECV_LOWATER 128 97 #define UDP_XMIT_HIWATER (56 * 1024) 98 #define UDP_XMIT_LOWATER 1024 99 100 /* 101 * UDP stack instances 102 */ 103 struct udp_stack { 104 netstack_t *us_netstack; /* Common netstack */ 105 106 uint_t us_bind_fanout_size; 107 udp_fanout_t *us_bind_fanout; 108 109 int us_num_epriv_ports; 110 in_port_t us_epriv_ports[UDP_NUM_EPRIV_PORTS]; 111 kmutex_t us_epriv_port_lock; 112 113 /* Hint not protected by any lock */ 114 in_port_t us_next_port_to_try; 115 116 /* UDP tunables table */ 117 struct mod_prop_info_s *us_propinfo_tbl; 118 119 kstat_t *us_mibkp; /* kstats exporting mib data */ 120 kstat_t *us_kstat; 121 udp_stat_t us_statistics; 122 123 mib2_udp_t us_udp_mib; /* SNMP fixed size info */ 124 125 /* 126 * The smallest anonymous port in the priviledged port range which UDP 127 * looks for free port. Use in the option UDP_ANONPRIVBIND. 128 */ 129 in_port_t us_min_anonpriv_port; 130 131 ldi_ident_t us_ldi_ident; 132 }; 133 134 typedef struct udp_stack udp_stack_t; 135 136 /* Internal udp control structure, one per open stream */ 137 typedef struct udp_s { 138 /* 139 * The addresses and ports in the conn_t and udp_state are protected by 140 * conn_lock and the fanout lock i.e. uf_lock. Need both locks to change 141 * the fields, either lock is sufficient for reading the field. 142 * conn_lock also protects the content of udp_t. 143 */ 144 uint32_t udp_state; /* TPI state */ 145 146 ip_pkt_t udp_recv_ipp; /* Used for IPv4 options received */ 147 148 /* Written to only once at the time of opening the endpoint */ 149 conn_t *udp_connp; 150 151 uint32_t 152 udp_issocket : 1, /* socket mode; sockfs is on top */ 153 udp_nat_t_endpoint : 1, /* UDP_NAT_T_ENDPOINT option */ 154 udp_rcvhdr : 1, /* UDP_RCVHDR option */ 155 156 udp_pad_to_bit_31 : 29; 157 158 /* Following 2 fields protected by the uf_lock */ 159 struct udp_s *udp_bind_hash; /* Bind hash chain */ 160 struct udp_s **udp_ptpbhn; /* Pointer to previous bind hash next. */ 161 162 kmutex_t udp_recv_lock; /* recv lock */ 163 size_t udp_rcv_disply_hiwat; /* user's view of rcvbuf */ 164 size_t udp_rcv_hiwat; /* receive high watermark */ 165 166 /* Set at open time and never changed */ 167 udp_stack_t *udp_us; /* Stack instance for zone */ 168 169 int udp_delayed_error; 170 mblk_t *udp_fallback_queue_head; 171 mblk_t *udp_fallback_queue_tail; 172 struct sockaddr_storage udp_delayed_addr; 173 } udp_t; 174 175 /* UDP Protocol header aligned */ 176 typedef struct udpahdr_s { 177 in_port_t uha_src_port; /* Source port */ 178 in_port_t uha_dst_port; /* Destination port */ 179 uint16_t uha_length; /* UDP length */ 180 uint16_t uha_checksum; /* UDP checksum */ 181 } udpha_t; 182 183 #define us_wroff_extra us_propinfo_tbl[0].prop_cur_uval 184 #define us_ipv4_ttl us_propinfo_tbl[1].prop_cur_uval 185 #define us_ipv6_hoplimit us_propinfo_tbl[2].prop_cur_uval 186 #define us_smallest_nonpriv_port us_propinfo_tbl[3].prop_cur_uval 187 #define us_do_checksum us_propinfo_tbl[4].prop_cur_bval 188 #define us_smallest_anon_port us_propinfo_tbl[5].prop_cur_uval 189 #define us_largest_anon_port us_propinfo_tbl[6].prop_cur_uval 190 #define us_xmit_hiwat us_propinfo_tbl[7].prop_cur_uval 191 #define us_xmit_lowat us_propinfo_tbl[8].prop_cur_uval 192 #define us_recv_hiwat us_propinfo_tbl[9].prop_cur_uval 193 #define us_max_buf us_propinfo_tbl[10].prop_cur_uval 194 #define us_pmtu_discovery us_propinfo_tbl[11].prop_cur_bval 195 #define us_sendto_ignerr us_propinfo_tbl[12].prop_cur_bval 196 197 #define UDP_STAT(us, x) ((us)->us_statistics.x.value.ui64++) 198 #define UDP_STAT_UPDATE(us, x, n) \ 199 ((us)->us_statistics.x.value.ui64 += (n)) 200 #ifdef DEBUG 201 #define UDP_DBGSTAT(us, x) UDP_STAT(us, x) 202 #else 203 #define UDP_DBGSTAT(us, x) 204 #endif /* DEBUG */ 205 206 extern int udp_opt_default(queue_t *, t_scalar_t, t_scalar_t, uchar_t *); 207 extern int udp_tpi_opt_get(queue_t *, t_scalar_t, t_scalar_t, uchar_t *); 208 extern int udp_tpi_opt_set(queue_t *, uint_t, int, int, uint_t, uchar_t *, 209 uint_t *, uchar_t *, void *, cred_t *); 210 extern mblk_t *udp_snmp_get(queue_t *, mblk_t *); 211 extern int udp_snmp_set(queue_t *, t_scalar_t, t_scalar_t, uchar_t *, int); 212 extern void udp_ddi_g_init(void); 213 extern void udp_ddi_g_destroy(void); 214 extern void udp_output(conn_t *connp, mblk_t *mp, struct sockaddr *addr, 215 socklen_t addrlen); 216 extern void udp_wput(queue_t *, mblk_t *); 217 218 /* 219 * Object to represent database of options to search passed to 220 * {sock,tpi}optcom_req() interface routine to take care of option 221 * management and associated methods. 222 */ 223 extern optdb_obj_t udp_opt_obj; 224 extern uint_t udp_max_optsize; 225 226 extern sock_lower_handle_t udp_create(int, int, int, sock_downcalls_t **, 227 uint_t *, int *, int, cred_t *); 228 extern int udp_fallback(sock_lower_handle_t, queue_t *, boolean_t, 229 so_proto_quiesced_cb_t, sock_quiesce_arg_t *); 230 231 extern sock_downcalls_t sock_udp_downcalls; 232 233 #endif /* _KERNEL */ 234 235 #ifdef __cplusplus 236 } 237 #endif 238 239 #endif /* _UDP_IMPL_H */ 240