librb/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  */
  25
  26 #ifndef RB_LIB_H
  27 # error "Do not use commio.h directly"
  28 #endif
  29
  30 #ifndef INCLUDED_commio_h
  31 #define INCLUDED_commio_h
  32
  33
  34 struct sockaddr;
  35 struct _fde;
  36 typedef struct _fde rb_fde_t;
  37
  38 /* Callback for completed IO events */
  39 typedef void PF(rb_fde_t *, void *);
  40
  41 /* Callback for completed connections */
  42 /* int fd, int status, void * */
  43 typedef void CNCB(rb_fde_t *, int, void *);
  44 /* callback for fd table dumps */
  45 typedef void DUMPCB(int, const char *desc, void *);
  46 /* callback for accept callbacks */
  47 typedef void ACCB(rb_fde_t *, int status, struct sockaddr *addr, rb_socklen_t len, void *);
  48 /* callback for pre-accept callback */
  49 typedef int ACPRE(rb_fde_t *, struct sockaddr *addr, rb_socklen_t len, void *);
  50
  51 enum
  52 {
  53         RB_OK,
  54         RB_ERR_BIND,
  55         RB_ERR_DNS,
  56         RB_ERR_TIMEOUT,
  57         RB_ERR_CONNECT,
  58         RB_ERROR,
  59         RB_ERROR_SSL,
  60         RB_ERR_MAX
  61 };
  62
  63 #define RB_FD_NONE              0x01
  64 #define RB_FD_FILE              0x02
  65 #define RB_FD_SOCKET            0x04
  66 #define RB_FD_PIPE              0x08
  67 #define RB_FD_LISTEN            0x10
  68 #define RB_FD_SSL               0x20
  69 #define RB_FD_UNKNOWN           0x40
  70 #define RB_FD_SCTP              0x80
  71
  72 #define RB_FD_INHERIT_TYPES     (RB_FD_SCTP)
  73
  74 #define RB_RW_IO_ERROR          -1      /* System call error */
  75 #define RB_RW_SSL_ERROR         -2      /* SSL Error */
  76 #define RB_RW_SSL_NEED_READ     -3      /* SSL Needs read */
  77 #define RB_RW_SSL_NEED_WRITE    -4      /* SSL Needs write */
  78
  79
  80 struct rb_iovec
  81 {
  82         void *iov_base;
  83         size_t iov_len;
  84 };
  85
  86
  87 void rb_fdlist_init(int closeall, int maxfds, size_t heapsize);
  88
  89 rb_fde_t *rb_open(int, uint8_t, const char *);
  90 void rb_close(rb_fde_t *);
  91 void rb_dump_fd(DUMPCB *, void *xdata);
  92 void rb_note(rb_fde_t *, const char *);
  93 void rb_close_pending_fds(void);
  94
  95 /* Type of IO */
  96 #define RB_SELECT_READ          0x1
  97 #define RB_SELECT_WRITE         0x2
  98
  99 #define RB_SELECT_ACCEPT        RB_SELECT_READ
 100 #define RB_SELECT_CONNECT       RB_SELECT_WRITE
 101
 102 #define RB_SSL_CERTFP_LEN       64
 103
 104 /* Methods for certfp */
 105 /* Digest of full X.509 certificate */
 106 #define RB_SSL_CERTFP_METH_CERT_SHA1    0x0000
 107 #define RB_SSL_CERTFP_METH_CERT_SHA256  0x0001
 108 #define RB_SSL_CERTFP_METH_CERT_SHA512  0x0002
 109 /* Digest of SubjectPublicKeyInfo (RFC 5280), used by DANE (RFC 6698) */
 110 #define RB_SSL_CERTFP_METH_SPKI_SHA256  0x1001
 111 #define RB_SSL_CERTFP_METH_SPKI_SHA512  0x1002
 112
 113 #define RB_SSL_CERTFP_LEN_SHA1          20
 114 #define RB_SSL_CERTFP_LEN_SHA256        32
 115 #define RB_SSL_CERTFP_LEN_SHA512        64
 116
 117 int rb_set_nb(rb_fde_t *);
 118 int rb_set_cloexec(rb_fde_t *);
 119 int rb_clear_cloexec(rb_fde_t *);
 120 int rb_set_buffers(rb_fde_t *, int);
 121
 122 int rb_get_sockerr(rb_fde_t *);
 123
 124 void rb_settimeout(rb_fde_t *, time_t, PF *, void *);
 125 void rb_checktimeouts(void *);
 126 void rb_connect_tcp(rb_fde_t *, struct sockaddr *, struct sockaddr *, CNCB *, void *, int);
 127 void rb_connect_tcp_ssl(rb_fde_t *, struct sockaddr *, struct sockaddr *, CNCB *, void *, int);
 128 void rb_connect_sctp(rb_fde_t *, struct sockaddr_storage *connect_addrs, size_t connect_len, struct sockaddr_storage *bind_addrs, size_t bind_len, CNCB *, void *, int);
 129 int rb_connect_sockaddr(rb_fde_t *, struct sockaddr *addr, int len);
 130
 131 const char *rb_errstr(int status);
 132 rb_fde_t *rb_socket(int family, int sock_type, int proto, const char *note);
 133 int rb_socketpair(int family, int sock_type, int proto, rb_fde_t **F1, rb_fde_t **F2,
 134                   const char *note);
 135
 136 int rb_bind(rb_fde_t *F, struct sockaddr *addr);
 137 int rb_sctp_bindx(rb_fde_t *F, struct sockaddr_storage *addrs, size_t len);
 138 int rb_inet_get_proto(rb_fde_t *F);
 139
 140 void rb_accept_tcp(rb_fde_t *, ACPRE * precb, ACCB * callback, void *data);
 141 ssize_t rb_write(rb_fde_t *, const void *buf, int count);
 142 ssize_t rb_writev(rb_fde_t *, struct rb_iovec *vector, int count);
 143
 144 ssize_t rb_read(rb_fde_t *, void *buf, int count);
 145 int rb_pipe(rb_fde_t **, rb_fde_t **, const char *desc);
 146
 147 int rb_setup_ssl_server(const char *cert, const char *keyfile, const char *dhfile, const char *cipher_list);
 148 int rb_ssl_listen(rb_fde_t *, int backlog, int defer_accept);
 149 int rb_listen(rb_fde_t *, int backlog, int defer_accept);
 150
 151 const char *rb_inet_ntop(int af, const void *src, char *dst, unsigned int size);
 152 int rb_inet_pton(int af, const char *src, void *dst);
 153 const char *rb_inet_ntop_sock(struct sockaddr *src, char *dst, unsigned int size);
 154 int rb_inet_pton_sock(const char *src, struct sockaddr_storage *dst);
 155 int rb_getmaxconnect(void);
 156 int rb_ignore_errno(int);
 157
 158 /* Generic wrappers */
 159 void rb_setselect(rb_fde_t *, unsigned int type, PF * handler, void *client_data);
 160 void rb_init_netio(void);
 161 int rb_select(unsigned long);
 162 int rb_fd_ssl(rb_fde_t *F);
 163 int rb_get_fd(rb_fde_t *F);
 164 const char *rb_get_ssl_strerror(rb_fde_t *F);
 165 int rb_get_ssl_certfp(rb_fde_t *F, uint8_t certfp[RB_SSL_CERTFP_LEN], int method);
 166 int rb_get_ssl_certfp_file(const char *filename, uint8_t certfp[RB_SSL_CERTFP_LEN], int method);
 167
 168 rb_fde_t *rb_get_fde(int fd);
 169
 170 int rb_send_fd_buf(rb_fde_t *xF, rb_fde_t **F, int count, void *data, size_t datasize, pid_t pid);
 171 int rb_recv_fd_buf(rb_fde_t *F, void *data, size_t datasize, rb_fde_t **xF, int count);
 172
 173 void rb_set_type(rb_fde_t *F, uint8_t type);
 174 uint8_t rb_get_type(rb_fde_t *F);
 175
 176 const char *rb_get_iotype(void);
 177
 178 typedef enum
 179 {
 180         RB_PRNG_FILE,
 181         RB_PRNG_DEFAULT,
 182 } prng_seed_t;
 183
 184 int rb_init_prng(const char *path, prng_seed_t seed_type);
 185 int rb_get_random(void *buf, size_t len);
 186 void rb_ssl_start_accepted(rb_fde_t *new_F, ACCB * cb, void *data, int timeout);
 187 void rb_ssl_start_connected(rb_fde_t *F, CNCB * callback, void *data, int timeout);
 188 int rb_supports_ssl(void);
 189
 190 unsigned int rb_ssl_handshake_count(rb_fde_t *F);
 191 void rb_ssl_clear_handshake_count(rb_fde_t *F);
 192
 193 int rb_pass_fd_to_process(rb_fde_t *, pid_t, rb_fde_t *);
 194 rb_fde_t *rb_recv_fd(rb_fde_t *);
 195
 196 const char *rb_ssl_get_cipher(rb_fde_t *F);
 197
 198 int rb_ipv4_from_ipv6(const struct sockaddr_in6 *restrict ip6, struct sockaddr_in *restrict ip4);
 199
 200 #endif /* INCLUDED_commio_h */