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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
|
/*
* Copyright (c) 2021 Omar Polo <op@omarpolo.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Test program for fastcgi. It speaks the protocol over stdin.
* Can't handle more than one request at the same time.
*/
#include "../config.h"
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/un.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define FCGI_VERSION_1 1
/* subset of records that matters to us */
#define FCGI_BEGIN_REQUEST 1
#define FCGI_END_REQUEST 3
#define FCGI_PARAMS 4
#define FCGI_STDIN 5
#define FCGI_STDOUT 6
#define SUM(a, b) (((a) << 8) + (b))
struct fcgi_header {
uint8_t version;
uint8_t type;
uint8_t req_id1;
uint8_t req_id0;
uint8_t content_len1;
uint8_t content_len0;
uint8_t padding;
uint8_t reserved;
};
struct fcgi_end_req_body {
unsigned char app_status3;
unsigned char app_status2;
unsigned char app_status1;
unsigned char app_status0;
unsigned char proto_status;
unsigned char reserved[3];
};
static int
prepare_header(struct fcgi_header *h, int type, int id, size_t size,
size_t padding)
{
memset(h, 0, sizeof(*h));
h->version = FCGI_VERSION_1;
h->type = type;
h->req_id1 = (id >> 8);
h->req_id0 = (id & 0xFF);
h->content_len1 = (size >> 8);
h->content_len0 = (size & 0xFF);
h->padding = padding;
return 0;
}
static void
must_read(int sock, void *d, size_t len)
{
uint8_t *data = d;
ssize_t r;
while (len > 0) {
switch (r = read(sock, data, len)) {
case -1:
err(1, "read");
case 0:
errx(1, "EOF");
default:
len -= r;
data += r;
}
}
}
static void
must_write(int sock, const void *d, size_t len)
{
const uint8_t *data = d;
ssize_t w;
while (len > 0) {
switch (w = write(sock, data, len)) {
case -1:
err(1, "write");
case 0:
errx(1, "EOF");
default:
len -= w;
data += w;
}
}
}
static int
consume(int fd, size_t len)
{
size_t l;
char buf[64];
while (len != 0) {
if ((l = len) > sizeof(buf))
l = sizeof(buf);
must_read(fd, buf, l);
len -= l;
}
return 1;
}
static void
read_header(int fd, struct fcgi_header *hdr)
{
must_read(fd, hdr, sizeof(*hdr));
}
/* read and consume a record of the given type */
static void
assert_record(int fd, int type)
{
struct fcgi_header hdr;
read_header(fd, &hdr);
if (hdr.type != type)
errx(1, "expected record type %d; got %d",
type, hdr.type);
consume(fd, SUM(hdr.content_len1, hdr.content_len0));
consume(fd, hdr.padding);
}
int
main(int argc, char **argv)
{
struct fcgi_header hdr;
struct fcgi_end_req_body end;
struct sockaddr_un sun;
const char *path;
const char *msg;
size_t len;
int ch, sock, s;
while ((ch = getopt(argc, argv, "")) != -1)
errx(1, "wrong usage");
argc -= optind;
argv += optind;
if (argc != 1)
errx(1, "wrong usage");
path = argv[0];
if ((sock = socket(AF_UNIX, SOCK_STREAM, 0)) == -1)
err(1, "socket");
memset(&sun, 0, sizeof(sun));
sun.sun_family = AF_UNIX;
(void)strlcpy(sun.sun_path, path, sizeof(sun.sun_path));
if (unlink(path) == -1 && errno != ENOENT)
err(1, "unlink %s", path);
if (bind(sock, (struct sockaddr *)&sun, sizeof(sun)) == -1)
err(1, "bind");
if (listen(sock, 5) == -1)
err(1, "listen");
for (;;) {
if ((s = accept(sock, NULL, NULL)) == -1) {
warn("retrying; accept failed");
continue;
}
assert_record(s, FCGI_BEGIN_REQUEST);
/* read params */
for (;;) {
read_header(s, &hdr);
consume(s, SUM(hdr.content_len1, hdr.content_len0));
consume(s, hdr.padding);
if (hdr.type != FCGI_PARAMS)
errx(1, "got %d; expecting PARAMS", hdr.type);
if (hdr.content_len0 == 0 &&
hdr.content_len1 == 0 &&
hdr.padding == 0)
break;
}
assert_record(s, FCGI_STDIN);
msg = "20 text/gemini\r\n# hello from fastcgi!\n";
len = strlen(msg);
prepare_header(&hdr, FCGI_STDOUT, 1, len, 0);
must_write(s, &hdr, sizeof(hdr));
must_write(s, msg, len);
msg = "some more content in the page...\n";
len = strlen(msg);
prepare_header(&hdr, FCGI_STDOUT, 1, len, 0);
must_write(s, &hdr, sizeof(hdr));
must_write(s, msg, len);
prepare_header(&hdr, FCGI_END_REQUEST, 1, sizeof(end), 0);
write(s, &hdr, sizeof(hdr));
memset(&end, 0, sizeof(end));
write(s, &end, sizeof(end));
}
}
|
