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
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2019. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* %CopyrightEnd%
*/
/*
* User Supplied Socket Implementation (ussi)
* for test purpose.
*/
#include <stdlib.h>
#include <string.h>
#include "ei.h"
struct my_ctx
{
void* ctx;
};
/*
* To minimize effort but still test a different context format
* we cheat and wrap the existing TCP default callbacks.
*/
extern ei_socket_callbacks ei_default_socket_callbacks;
static int my_socket(void **ctx, void *setup_ctx)
{
struct my_ctx *myctx = malloc(sizeof(struct my_ctx));
int ret;
ret = ei_default_socket_callbacks.socket(&myctx->ctx, NULL);
*ctx = myctx;
return ret;
}
static int my_close(void *ctx)
{
struct my_ctx *myctx = ctx;
int ret = ei_default_socket_callbacks.close(myctx->ctx);
free(myctx);
return ret;
}
static int my_get_fd(void *ctx, int *fd)
{
struct my_ctx *myctx = ctx;
return ei_default_socket_callbacks.get_fd(myctx->ctx, fd);
}
static int my_hs_packet_header_size(void *ctx, int *sz)
{
struct my_ctx *myctx = ctx;
return ei_default_socket_callbacks.handshake_packet_header_size(myctx->ctx, sz);
}
static int my_connect_handshake_complete(void *ctx)
{
struct my_ctx *myctx = ctx;
return ei_default_socket_callbacks.connect_handshake_complete(myctx->ctx);
}
static int my_accept_handshake_complete(void *ctx)
{
struct my_ctx *myctx = ctx;
return ei_default_socket_callbacks.accept_handshake_complete(myctx->ctx);
}
static int my_listen(void *ctx, void *addr, int *len, int backlog)
{
struct my_ctx *myctx = ctx;
return ei_default_socket_callbacks.listen(myctx->ctx, addr, len, backlog);
}
static int my_accept(void **ctx, void *addr, int *len, unsigned tmo)
{
struct my_ctx *listen_ctx = *ctx;
struct my_ctx *conn_ctx = malloc(sizeof(struct my_ctx));
int ret;
*conn_ctx = *listen_ctx;
ret = ei_default_socket_callbacks.accept(&conn_ctx->ctx, addr, len, tmo);
if (ret == 0)
*ctx = conn_ctx;
else
free(conn_ctx);
return ret;
}
static int my_connect(void *ctx, void *addr, int len, unsigned tmo)
{
struct my_ctx *myctx = ctx;
return ei_default_socket_callbacks.connect(myctx->ctx, addr, len, tmo);
}
static void* memdup(const void* mem, int nbytes)
{
void *p = malloc(nbytes);
memcpy(p, mem, nbytes);
return p;
}
static void scramble(void* bytes, int nbytes)
{
/* Would be nice to really test that only our callbacks are used
and the default ones are not.
Need corresponding Erlang distribution impl to work.
unsigned char *p = bytes;
int i;
for (i=0; i < nbytes; ++i)
p[i] = ~p[i];
*/
}
/* our own iovec struct to avoid config dependency HAVE_WRITEV */
struct my_iovec {
void *iov_base; /* Starting address */
size_t iov_len; /* Number of bytes to transfer */
};
static int my_writev(void *ctx, const void *viov, int iovcnt, ssize_t *len, unsigned tmo)
{
struct my_ctx *myctx = ctx;
struct my_iovec *iov;
int i, ret;
/* create mutable copy of both iovec and data */
iov = memdup(viov, sizeof(struct my_iovec) * iovcnt);
for (i=0; i < iovcnt; ++i) {
iov[i].iov_base = memdup(iov[i].iov_base, iov[i].iov_len);
scramble(iov[i].iov_base, iov[i].iov_len);
}
ret = ei_default_socket_callbacks.writev(myctx->ctx, viov, iovcnt, len, tmo);
for (i=0; i < iovcnt; ++i)
free(iov[i].iov_base);
free(iov);
return ret;
}
static int my_write(void *ctx, const char* buf, ssize_t *len, unsigned tmo)
{
struct my_ctx *myctx = ctx;
unsigned char* copy = memdup(buf, *len);
int i, ret;
scramble(copy, *len);
ret = ei_default_socket_callbacks.write(myctx->ctx, copy, len, tmo);
free(copy);
return ret;
}
static int my_read(void *ctx, char* buf, ssize_t *len, unsigned tmo)
{
struct my_ctx *myctx = ctx;
int ret, i;
ret = ei_default_socket_callbacks.read(myctx->ctx, buf, len, tmo);
if (ret == 0)
scramble(buf, *len);
return ret;
}
ei_socket_callbacks my_ussi = {
0, /* flags */
my_socket,
my_close,
my_listen,
my_accept,
my_connect,
my_writev,
my_write,
my_read,
my_hs_packet_header_size,
my_connect_handshake_complete,
my_accept_handshake_complete,
my_get_fd
};
void my_ussi_init(void)
{
my_ussi.flags = ei_default_socket_callbacks.flags;
if (!ei_default_socket_callbacks.writev)
my_ussi.writev = NULL;
}
|
