usr/src/stand/lib/sock/socket_impl.h

   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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2002-2003 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Internal socket-specific definitions
  27  */
  28
  29 #ifndef _SOCKET_IMPL_H
  30 #define _SOCKET_IMPL_H
  31
  32 #pragma ident   "%Z%%M% %I%     %E% SMI"
  33
  34 #ifdef  __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 #include <sys/types.h>
  39 #include <sys/socket.h>
  40
  41 /*
  42  * Socket support definitions
  43  */
  44
  45 #define MAXSOCKET       (10)
  46 #define SOCKETTYPE      (65536)
  47 #define MEDIA_LVL       0
  48 #define NETWORK_LVL     1
  49 #define TRANSPORT_LVL   2
  50 #define APP_LVL         3
  51
  52 /* Anonymous ports assigned by socket. */
  53 #define SMALLEST_ANON_PORT      32768
  54 #define LARGEST_ANON_PORT       ((64 * 1024) - 1)
  55
  56 /* Socket state bits. */
  57 #define SS_ISCONNECTED          0x000001 /* socket connected to a peer */
  58 #define SS_ISCONNECTING         0x000002 /* in process of connecting to peer */
  59
  60 #define SS_CANTRCVMORE          0x000010 /* can't receive more data from peer */
  61 #define SS_CANTSENDMORE         0x000008 /* can't send more data to peer */
  62
  63 enum { FALSE, TRUE };
  64 enum SockType { INETBOOT_UNUSED, INETBOOT_DGRAM, INETBOOT_RAW,
  65     INETBOOT_STREAM };
  66 enum Ports { SOURCE, DESTINATION };
  67 #define FD_TO_SOCKET(v) ((v) - SOCKETTYPE)
  68
  69 /*
  70  * Message block descriptor copied from include/sys/stream.h.
  71  * We need to do that to simplify the porting of TCP code from core
  72  * kernel to inetboot.  Note that fields which are not used by TCP
  73  * code are removed.
  74  */
  75 typedef struct  msgb {
  76         struct  msgb    *b_next;
  77         struct  msgb    *b_prev;
  78         struct  msgb    *b_cont;
  79         unsigned char   *b_rptr;
  80         unsigned char   *b_wptr;
  81         unsigned char   *b_datap;
  82         size_t          b_size;
  83 } mblk_t;
  84
  85 /* Modified stream routines to ease TCP porting. */
  86 extern mblk_t *allocb(size_t, uint_t);
  87 extern mblk_t *dupb(mblk_t *);
  88 extern void freeb(mblk_t *);
  89 extern void freemsg(mblk_t *);
  90 extern size_t msgdsize(mblk_t *);
  91
  92 /*
  93  * "target" is needed for input prior to IP address assignment. It may
  94  * seem redundant given the binding information contained in the socket,
  95  * but that's only true if we have an IP address. If we don't, and we
  96  * try DHCP, we'll try to udp checksum using INADDR_ANY as the destination
  97  * IP address, when in fact the destination IP address was the IP address
  98  * we were OFFERED/Assigned.
  99  */
 100 struct inetgram {
 101         /* Common */
 102         struct sockaddr_in      igm_saddr;      /* source address info */
 103         int                     igm_level;      /* Stack level (LVL) of data */
 104         mblk_t                  *igm_mp;
 105         struct inetgram         *igm_next;      /* next inetgram in list */
 106         union {
 107                 struct {
 108                         /* Input specific */
 109                         struct in_addr  in_t;
 110                         uint16_t        in_i;
 111                 } _IN_un;
 112                 struct {
 113                         /* Output specific */
 114                         struct in_addr  out_r;
 115                         int             out_f;
 116                 } _OUT_un;
 117         } _i_o_inet;
 118 #define igm_target      _i_o_inet._IN_un.in_t   /* See above comment block */
 119 #define igm_id          _i_o_inet._IN_un.in_i   /* IP id */
 120 #define igm_router      _i_o_inet._OUT_un.out_r /* first router IP  ... */
 121 #define igm_oflags      _i_o_inet._OUT_un.out_f /* flag: 0 or MSG_DONTROUTE */
 122 };
 123
 124 struct inetboot_socket {
 125         enum SockType           type;           /* socket type */
 126         uint8_t                 proto;          /* ip protocol */
 127         int                     out_flags;      /* 0 or MSG_DONTROUTE */
 128         boolean_t               bound;          /* boolean */
 129         uint32_t                so_state;       /* Socket state */
 130         int                     so_error;       /* Socket error */
 131         struct sockaddr_in      bind;           /* Binding info */
 132         struct sockaddr_in      remote;         /* Remote address */
 133         struct inetgram         *inq;           /* input queue */
 134         int                     so_sndbuf;      /* max send buf size */
 135         int                     so_rcvbuf;      /* max receive buf size */
 136         struct linger           so_linger;      /* close linger time */
 137         uint32_t                in_timeout;     /* Input timeout (msec) */
 138         uint32_t                so_opt;         /* socket level option */
 139         int                     (*headerlen[APP_LVL])(struct inetgram *);
 140         int                     (*input[APP_LVL])(int);
 141         int                     (*output[APP_LVL])(int, struct inetgram *);
 142         int                     (*close[APP_LVL])(int);
 143         in_port_t               (*ports)(uint16_t *, enum Ports);
 144         void                    *pcb;           /* Protocol control block */
 145 };
 146
 147 extern struct inetboot_socket   sockets[MAXSOCKET];
 148
 149 extern void add_grams(struct inetgram **, struct inetgram *);
 150 extern void del_gram(struct inetgram **, struct inetgram *, int);
 151 extern void nuke_grams(struct inetgram **);
 152 extern struct inetgram *last_gram(struct inetgram *);
 153
 154 extern int so_check_fd(int, int *);
 155
 156 #ifdef  __cplusplus
 157 }
 158 #endif
 159
 160 #endif /* _SOCKET_IMPL_H */