1 /*
2 * Redistribution and use in source and binary forms, with or without modification,
3 * are permitted provided that the following conditions are met:
4 *
5 * 1. Redistributions of source code must retain the above copyright notice,
6 * this list of conditions and the following disclaimer.
7 * 2. Redistributions in binary form must reproduce the above copyright notice,
8 * this list of conditions and the following disclaimer in the documentation
9 * and/or other materials provided with the distribution.
10 * 3. The name of the author may not be used to endorse or promote products
11 * derived from this software without specific prior written permission.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
14 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
15 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
16 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
17 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
18 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
19 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
20 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
21 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
22 * OF SUCH DAMAGE.
23 *
24 * This file is part of the lwIP TCP/IP stack.
25 *
26 * Author: Dirk Ziegelmeier <dziegel@gmx.de>
27 *
28 */
29
30 #include <stdio.h>
31
32 #include "lwip/apps/tftp_client.h"
33 #include "lwip/apps/tftp_server.h"
34 #include "tftp_example.h"
35
36 #include <string.h>
37
38 #if LWIP_UDP
39
40 /* Define a base directory for TFTP access
41 * ATTENTION: This code does NOT check for sandboxing,
42 * i.e. '..' in paths is not checked! */
43 #ifndef LWIP_TFTP_EXAMPLE_BASE_DIR
44 #define LWIP_TFTP_EXAMPLE_BASE_DIR ""
45 #endif
46
47 /* Define this to a file to get via tftp client */
48 #ifndef LWIP_TFTP_EXAMPLE_CLIENT_FILENAME
49 #define LWIP_TFTP_EXAMPLE_CLIENT_FILENAME "test.bin"
50 #endif
51
52 /* Define this to a server IP string */
53 #ifndef LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP
54 #define LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP "192.168.0.1"
55 #endif
56
57 static char full_filename[256];
58
59 static void *
tftp_open_file(const char * fname,u8_t is_write)60 tftp_open_file(const char* fname, u8_t is_write)
61 {
62 snprintf(full_filename, sizeof(full_filename), "%s%s", LWIP_TFTP_EXAMPLE_BASE_DIR, fname);
63 full_filename[sizeof(full_filename)-1] = 0;
64
65 if (is_write) {
66 return (void*)fopen(full_filename, "wb");
67 } else {
68 return (void*)fopen(full_filename, "rb");
69 }
70 }
71
72 static void*
tftp_open(const char * fname,const char * mode,u8_t is_write)73 tftp_open(const char* fname, const char* mode, u8_t is_write)
74 {
75 LWIP_UNUSED_ARG(mode);
76 return tftp_open_file(fname, is_write);
77 }
78
79 static void
tftp_close(void * handle)80 tftp_close(void* handle)
81 {
82 fclose((FILE*)handle);
83 }
84
85 static int
tftp_read(void * handle,void * buf,int bytes)86 tftp_read(void* handle, void* buf, int bytes)
87 {
88 int ret = fread(buf, 1, bytes, (FILE*)handle);
89 if (ret <= 0) {
90 return -1;
91 }
92 return ret;
93 }
94
95 static int
tftp_write(void * handle,struct pbuf * p)96 tftp_write(void* handle, struct pbuf* p)
97 {
98 while (p != NULL) {
99 if (fwrite(p->payload, 1, p->len, (FILE*)handle) != (size_t)p->len) {
100 return -1;
101 }
102 p = p->next;
103 }
104
105 return 0;
106 }
107
108 /* For TFTP client only */
109 static void
tftp_error(void * handle,int err,const char * msg,int size)110 tftp_error(void* handle, int err, const char* msg, int size)
111 {
112 char message[100];
113
114 LWIP_UNUSED_ARG(handle);
115
116 memset(message, 0, sizeof(message));
117 MEMCPY(message, msg, LWIP_MIN(sizeof(message)-1, (size_t)size));
118
119 printf("TFTP error: %d (%s)", err, message);
120 }
121
122 static const struct tftp_context tftp = {
123 tftp_open,
124 tftp_close,
125 tftp_read,
126 tftp_write,
127 tftp_error
128 };
129
130 void
tftp_example_init_server(void)131 tftp_example_init_server(void)
132 {
133 tftp_init_server(&tftp);
134 }
135
136 void
tftp_example_init_client(void)137 tftp_example_init_client(void)
138 {
139 void *f;
140 err_t err;
141 ip_addr_t srv;
142 int ret = ipaddr_aton(LWIP_TFTP_EXAMPLE_CLIENT_REMOTEIP, &srv);
143 LWIP_ASSERT("ipaddr_aton failed", ret == 1);
144 LWIP_UNUSED_ARG(ret);
145
146 err = tftp_init_client(&tftp);
147 LWIP_ASSERT("tftp_init_client failed", err == ERR_OK);
148
149 f = tftp_open_file(LWIP_TFTP_EXAMPLE_CLIENT_FILENAME, 1);
150 LWIP_ASSERT("failed to create file", f != NULL);
151
152 err = tftp_get(f, &srv, TFTP_PORT, LWIP_TFTP_EXAMPLE_CLIENT_FILENAME, TFTP_MODE_OCTET);
153 LWIP_ASSERT("tftp_get failed", err == ERR_OK);
154 }
155
156 #endif /* LWIP_UDP */
157