libratbox/include/rb_commio.h

   1 /*
   2  *  ircd-ratbox: A slightly useful ircd.
   3  *  commio.h: A header for the network subsystem.
   4  *
   5  *  Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
   6  *  Copyright (C) 1996-2002 Hybrid Development Team
   7  *  Copyright (C) 2002-2005 ircd-ratbox development team
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 2 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the Free Software
  21  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
  22  *  USA
  23  *
  24  *  $Id: rb_commio.h 26092 2008-09-19 15:13:52Z androsyn $
  25  */
  26
  27 #ifndef RB_LIB_H
  28 # error "Do not use commio.h directly"
  29 #endif
  30
  31 #ifndef INCLUDED_commio_h
  32 #define INCLUDED_commio_h
  33
  34
  35 struct sockaddr;
  36 struct _fde;
  37 typedef struct _fde rb_fde_t;
  38
  39 /* Callback for completed IO events */
  40 typedef void PF(rb_fde_t *, void *);
  41
  42 /* Callback for completed connections */
  43 /* int fd, int status, void * */
  44 typedef void CNCB(rb_fde_t *, int, void *);
  45 /* callback for fd table dumps */
  46 typedef void DUMPCB(int, const char *desc, void *);
  47 /* callback for accept callbacks */
  48 typedef void ACCB(rb_fde_t *, int status, struct sockaddr *addr, rb_socklen_t len, void *);
  49 /* callback for pre-accept callback */
  50 typedef int ACPRE(rb_fde_t *, struct sockaddr *addr, rb_socklen_t len, void *);
  51
  52 enum
  53 {
  54         RB_OK,
  55         RB_ERR_BIND,
  56         RB_ERR_DNS,
  57         RB_ERR_TIMEOUT,
  58         RB_ERR_CONNECT,
  59         RB_ERROR,
  60         RB_ERROR_SSL,
  61         RB_ERR_MAX
  62 };
  63
  64 #define RB_FD_NONE              0x01
  65 #define RB_FD_FILE              0x02
  66 #define RB_FD_SOCKET            0x04
  67 #ifndef _WIN32
  68 #define RB_FD_PIPE              0x08
  69 #else
  70 #define RB_FD_PIPE              RB_FD_SOCKET
  71 #endif
  72 #define RB_FD_LISTEN            0x10
  73 #define RB_FD_SSL               0x20
  74 #define RB_FD_UNKNOWN           0x40
  75
  76 #define RB_RW_IO_ERROR          -1      /* System call error */
  77 #define RB_RW_SSL_ERROR         -2      /* SSL Error */
  78 #define RB_RW_SSL_NEED_READ     -3      /* SSL Needs read */
  79 #define RB_RW_SSL_NEED_WRITE    -4      /* SSL Needs write */
  80
  81
  82 struct rb_iovec
  83 {
  84         void *iov_base;
  85         size_t iov_len;
  86 };
  87
  88
  89 void rb_fdlist_init(int closeall, int maxfds, size_t heapsize);
  90
  91 rb_fde_t *rb_open(int, uint8_t, const char *);
  92 void rb_close(rb_fde_t *);
  93 void rb_dump_fd(DUMPCB *, void *xdata);
  94 void rb_note(rb_fde_t *, const char *);
  95
  96 /* Type of IO */
  97 #define RB_SELECT_READ          0x1
  98 #define RB_SELECT_WRITE         0x2
  99
 100 #define RB_SELECT_ACCEPT        RB_SELECT_READ
 101 #define RB_SELECT_CONNECT       RB_SELECT_WRITE
 102
 103 #define RB_SSL_CERTFP_LEN       64
 104
 105 /* Methods for certfp */
 106 #define RB_SSL_CERTFP_METH_SHA1         0
 107 #define RB_SSL_CERTFP_METH_SHA256       1
 108 #define RB_SSL_CERTFP_METH_SHA512       2
 109
 110 #define RB_SSL_CERTFP_LEN_SHA1          20
 111 #define RB_SSL_CERTFP_LEN_SHA256        32
 112 #define RB_SSL_CERTFP_LEN_SHA512        64
 113
 114 int rb_set_nb(rb_fde_t *);
 115 int rb_set_buffers(rb_fde_t *, int);
 116
 117 int rb_get_sockerr(rb_fde_t *);
 118
 119 void rb_settimeout(rb_fde_t *, time_t, PF *, void *);
 120 void rb_checktimeouts(void *);
 121 void rb_connect_tcp(rb_fde_t *, struct sockaddr *, struct sockaddr *, int, CNCB *, void *, int);
 122 void rb_connect_tcp_ssl(rb_fde_t *, struct sockaddr *, struct sockaddr *, int, CNCB *, void *, int);
 123 int rb_connect_sockaddr(rb_fde_t *, struct sockaddr *addr, int len);
 124
 125 const char *rb_errstr(int status);
 126 rb_fde_t *rb_socket(int family, int sock_type, int proto, const char *note);
 127 int rb_socketpair(int family, int sock_type, int proto, rb_fde_t **F1, rb_fde_t **F2,
 128                   const char *note);
 129
 130 void rb_accept_tcp(rb_fde_t *, ACPRE * precb, ACCB * callback, void *data);
 131 ssize_t rb_write(rb_fde_t *, const void *buf, int count);
 132 ssize_t rb_writev(rb_fde_t *, struct rb_iovec *vector, int count);
 133
 134 ssize_t rb_read(rb_fde_t *, void *buf, int count);
 135 int rb_pipe(rb_fde_t **, rb_fde_t **, const char *desc);
 136
 137 int rb_setup_ssl_server(const char *cert, const char *keyfile, const char *dhfile, const char *cipher_list);
 138 int rb_ssl_listen(rb_fde_t *, int backlog, int defer_accept);
 139 int rb_listen(rb_fde_t *, int backlog, int defer_accept);
 140
 141 const char *rb_inet_ntop(int af, const void *src, char *dst, unsigned int size);
 142 int rb_inet_pton(int af, const char *src, void *dst);
 143 const char *rb_inet_ntop_sock(struct sockaddr *src, char *dst, unsigned int size);
 144 int rb_inet_pton_sock(const char *src, struct sockaddr *dst);
 145 int rb_getmaxconnect(void);
 146 int rb_ignore_errno(int);
 147
 148 /* Generic wrappers */
 149 void rb_setselect(rb_fde_t *, unsigned int type, PF * handler, void *client_data);
 150 void rb_init_netio(void);
 151 int rb_select(unsigned long);
 152 int rb_fd_ssl(rb_fde_t *F);
 153 int rb_get_fd(rb_fde_t *F);
 154 const char *rb_get_ssl_strerror(rb_fde_t *F);
 155 int rb_get_ssl_certfp(rb_fde_t *F, uint8_t certfp[RB_SSL_CERTFP_LEN], int method);
 156
 157 rb_fde_t *rb_get_fde(int fd);
 158
 159 int rb_send_fd_buf(rb_fde_t *xF, rb_fde_t **F, int count, void *data, size_t datasize, pid_t pid);
 160 int rb_recv_fd_buf(rb_fde_t *F, void *data, size_t datasize, rb_fde_t **xF, int count);
 161
 162 void rb_set_type(rb_fde_t *F, uint8_t type);
 163 uint8_t rb_get_type(rb_fde_t *F);
 164
 165 const char *rb_get_iotype(void);
 166
 167 typedef enum
 168 {
 169         RB_PRNG_FILE,
 170 #ifdef _WIN32
 171         RB_PRNGWIN32,
 172 #endif
 173         RB_PRNG_DEFAULT,
 174 } prng_seed_t;
 175
 176 int rb_init_prng(const char *path, prng_seed_t seed_type);
 177 int rb_get_random(void *buf, size_t len);
 178 void rb_ssl_start_accepted(rb_fde_t *new_F, ACCB * cb, void *data, int timeout);
 179 void rb_ssl_start_connected(rb_fde_t *F, CNCB * callback, void *data, int timeout);
 180 int rb_supports_ssl(void);
 181
 182 unsigned int rb_ssl_handshake_count(rb_fde_t *F);
 183 void rb_ssl_clear_handshake_count(rb_fde_t *F);
 184
 185
 186 int rb_pass_fd_to_process(rb_fde_t *, pid_t, rb_fde_t *);
 187 rb_fde_t *rb_recv_fd(rb_fde_t *);
 188
 189 const char *rb_ssl_get_cipher(rb_fde_t *F);
 190
 191 #endif /* INCLUDED_commio_h */