1 /* SPDX-License-Identifier: BSD-3-Clause */
2 /* tftp defines */
3 
4 #ifndef SLIRP_TFTP_H
5 #define SLIRP_TFTP_H
6 
7 #define TFTP_SESSIONS_MAX 20
8 
9 #define TFTP_SERVER 69
10 
11 #define TFTP_RRQ 1
12 #define TFTP_WRQ 2
13 #define TFTP_DATA 3
14 #define TFTP_ACK 4
15 #define TFTP_ERROR 5
16 #define TFTP_OACK 6
17 
18 #define TFTP_FILENAME_MAX 512
19 #define TFTP_BLOCKSIZE_MAX 1428
20 
21 struct tftp_t {
22     struct udphdr udp;
23     uint16_t tp_op;
24     union {
25         struct {
26             uint16_t tp_block_nr;
27             uint8_t tp_buf[TFTP_BLOCKSIZE_MAX];
28         } tp_data;
29         struct {
30             uint16_t tp_error_code;
31             uint8_t tp_msg[TFTP_BLOCKSIZE_MAX];
32         } tp_error;
33         char tp_buf[TFTP_BLOCKSIZE_MAX + 2];
34     } x;
35 } __attribute__((packed));
36 
37 struct tftp_session {
38     Slirp *slirp;
39     char *filename;
40     int fd;
41     uint16_t block_size;
42 
43     struct sockaddr_storage client_addr;
44     uint16_t client_port;
45     uint32_t block_nr;
46 
47     int timestamp;
48 };
49 
50 void tftp_input(struct sockaddr_storage *srcsas, struct mbuf *m);
51 
52 #endif
53