2 * Copyright (c) 1995 - 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 * accept a connection on `s' and pretend it's served by inetd.
44 accept_it (rk_socket_t s
, rk_socket_t
*ret_socket
)
48 as
= accept(s
, NULL
, NULL
);
49 if(rk_IS_BAD_SOCKET(as
))
57 int fd
= socket_to_fd(as
, 0);
59 /* We would use _O_RDONLY for the socket_to_fd() call for
60 STDIN, but there are instances where we assume that STDIN
63 dup2(fd
, STDIN_FILENO
);
64 dup2(fd
, STDOUT_FILENO
);
71 * Listen on a specified addresses
73 * Listens on the specified addresses for incoming connections. If
74 * the \a ret_socket parameter is \a NULL, on return STDIN and STDOUT
75 * will be connected to an accepted socket. If the \a ret_socket
76 * parameter is non-NULL, the accepted socket will be returned in
77 * *ret_socket. In the latter case, STDIN and STDOUT will be left
80 * This function does not return if there is an error or if no
81 * connection is established.
83 * @param[in] ai Addresses to listen on
84 * @param[out] ret_socket If non-NULL receives the accepted socket.
88 ROKEN_LIB_FUNCTION
void ROKEN_LIB_CALL
89 mini_inetd_addrinfo (struct addrinfo
*ai
, rk_socket_t
*ret_socket
)
95 fd_set orig_read_set
, read_set
;
96 rk_socket_t max_fd
= (rk_socket_t
)-1;
98 for (nalloc
= 0, a
= ai
; a
!= NULL
; a
= a
->ai_next
)
101 fds
= malloc (nalloc
* sizeof(*fds
));
103 errx (1, "mini_inetd: out of memory");
107 FD_ZERO(&orig_read_set
);
109 for (i
= 0, a
= ai
; a
!= NULL
; a
= a
->ai_next
) {
110 fds
[i
] = socket (a
->ai_family
, a
->ai_socktype
, a
->ai_protocol
);
111 if (rk_IS_BAD_SOCKET(fds
[i
]))
113 socket_set_reuseaddr (fds
[i
], 1);
114 socket_set_ipv6only(fds
[i
], 1);
115 if (rk_IS_SOCKET_ERROR(bind (fds
[i
], a
->ai_addr
, a
->ai_addrlen
))) {
116 warn ("bind af = %d", a
->ai_family
);
117 rk_closesocket(fds
[i
]);
118 fds
[i
] = rk_INVALID_SOCKET
;
121 if (rk_IS_SOCKET_ERROR(listen (fds
[i
], SOMAXCONN
))) {
122 warn ("listen af = %d", a
->ai_family
);
123 rk_closesocket(fds
[i
]);
124 fds
[i
] = rk_INVALID_SOCKET
;
127 #ifndef NO_LIMIT_FD_SETSIZE
128 if (fds
[i
] >= FD_SETSIZE
)
129 errx (1, "fd too large");
131 FD_SET(fds
[i
], &orig_read_set
);
132 max_fd
= max(max_fd
, fds
[i
]);
136 errx (1, "no sockets");
140 read_set
= orig_read_set
;
142 ret
= select (max_fd
+ 1, &read_set
, NULL
, NULL
, NULL
);
143 if (rk_IS_SOCKET_ERROR(ret
) && rk_SOCK_ERRNO
!= EINTR
)
147 for (i
= 0; i
< n
; ++i
)
148 if (FD_ISSET (fds
[i
], &read_set
)) {
149 accept_it (fds
[i
], ret_socket
);
150 for (i
= 0; i
< n
; ++i
)
151 rk_closesocket(fds
[i
]);
159 * Listen on a specified port
161 * Listens on the specified port for incoming connections. If the \a
162 * ret_socket parameter is \a NULL, on return STDIN and STDOUT will be
163 * connected to an accepted socket. If the \a ret_socket parameter is
164 * non-NULL, the accepted socket will be returned in *ret_socket. In
165 * the latter case, STDIN and STDOUT will be left unmodified.
167 * This function does not return if there is an error or if no
168 * connection is established.
170 * @param[in] port Port to listen on
171 * @param[out] ret_socket If non-NULL receives the accepted socket.
173 * @see mini_inetd_addrinfo()
175 ROKEN_LIB_FUNCTION
void ROKEN_LIB_CALL
176 mini_inetd(int port
, rk_socket_t
* ret_socket
)
179 struct addrinfo
*ai
, hints
;
180 char portstr
[NI_MAXSERV
];
182 memset (&hints
, 0, sizeof(hints
));
183 hints
.ai_flags
= AI_PASSIVE
;
184 hints
.ai_socktype
= SOCK_STREAM
;
185 hints
.ai_family
= PF_UNSPEC
;
187 snprintf (portstr
, sizeof(portstr
), "%d", ntohs(port
));
189 error
= getaddrinfo (NULL
, portstr
, &hints
, &ai
);
191 errx (1, "getaddrinfo: %s", gai_strerror (error
));
193 mini_inetd_addrinfo(ai
, ret_socket
);