1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/*-
* Copyright (c) 2026, Mr. Goblin
*
* SPDX-License-Identifier: BSD-2-Clause
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <netinet/in.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#ifndef BTASKTD_QUEUE_LEN
# define QUEUE_LEN 16
#endif
enum flag_val_res {
fvr_not_found = -1,
fvr_min = fvr_not_found,
fvr_ok = 0,
fvr_invalid,
fvr_max = fvr_invalid
};
struct str_flag_val {
enum flag_val_res code;
char *data;
};
struct int_flag_val {
enum flag_val_res code;
int data;
};
/* -f the_str */
static struct str_flag_val
extract_str_flag(char flagletter, int argc, char **argv)
{
struct str_flag_val res = {0};
char flagstr[3] = { '-', ' ', '\0' };
int i;
flagstr[1] = flagletter;
for (i = 1; i < argc; i++)
if (0 == strcmp(flagstr, argv[i]))
break;
if (i >= argc) {
res.code = fvr_not_found;
} else if (i == argc-1) {
res.code = fvr_invalid;
} else {
res.code = fvr_ok;
res.data = argv[i+1];
}
return res;
}
/* -f number */
static struct int_flag_val
extract_int_flag(char flagletter, int argc, char **argv)
{
struct int_flag_val res;
struct str_flag_val strres =
extract_str_flag(flagletter, argc, argv);
char *endptr;
res.code = strres.code;
if (res.code != fvr_ok) {
return res;
}
res.data = strtol(strres.data, &endptr, 10);
if (*endptr != '\0')
res.code = fvr_invalid;
return res;
}
int
main(int argc, char **argv)
{
int server_fd, opt = 1, res, flags, port;
struct sockaddr_in addr = {0};
struct int_flag_val port_res =
extract_int_flag('p', argc, argv);
switch (port_res.code) {
case fvr_not_found:
# ifdef BTASKTD_DEFAULT_PORT
port = BTASKTD_DEFAULT_PORT;
# else
fputs("No port specified!\n", stderr);
return 1;
# endif
break;
case fvr_invalid:
fputs("Invalid port!\n", stderr);
return 1;
case fvr_ok:
port = port_res.data;
}
server_fd = socket(AF_INET, SOCK_STREAM, 0);
if (server_fd < 0) {
perror("socket");
return 1;
}
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = htonl(INADDR_ANY);
res = bind(server_fd, (struct sockaddr*)&addr, sizeof(addr));
if (0 != res) {
close(server_fd);
perror("bind");
return 1;
}
res = listen(server_fd, QUEUE_LEN);
if (0 != res) {
close(server_fd);
perror("listen");
return 1;
}
res = setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR,
&opt, sizeof(opt));
if (0 != res) {
close(server_fd);
perror("setsockopt");
return 1;
}
flags = fcntl(server_fd, F_GETFL);
fcntl(server_fd, F_SETFL, flags|O_NONBLOCK);
printf("btaskt server btasktd started on port %d\n", port);
/* main loop here */
printf("btaskt server btasktd stopped\n");
close(server_fd);
return 0;
}
|
