1 | /*
|
---|
2 | * Copyright (c) 2018 Simon Goldschmidt
|
---|
3 | * All rights reserved.
|
---|
4 | *
|
---|
5 | * Redistribution and use in source and binary forms, with or without modification,
|
---|
6 | * are permitted provided that the following conditions are met:
|
---|
7 | *
|
---|
8 | * 1. Redistributions of source code must retain the above copyright notice,
|
---|
9 | * this list of conditions and the following disclaimer.
|
---|
10 | * 2. Redistributions in binary form must reproduce the above copyright notice,
|
---|
11 | * this list of conditions and the following disclaimer in the documentation
|
---|
12 | * and/or other materials provided with the distribution.
|
---|
13 | * 3. The name of the author may not be used to endorse or promote products
|
---|
14 | * derived from this software without specific prior written permission.
|
---|
15 | *
|
---|
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
---|
17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
---|
18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
|
---|
19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
|
---|
20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
|
---|
21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
---|
22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
---|
23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
---|
24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
|
---|
25 | * OF SUCH DAMAGE.
|
---|
26 | *
|
---|
27 | * Author: Simon Goldschmidt <goldsimon@gmx.de>
|
---|
28 | *
|
---|
29 | * To use the hooks in this file, make sure this file is included in LWIP_HOOK_FILENAME
|
---|
30 | * and define these hooks:
|
---|
31 | *
|
---|
32 | * #define LWIP_HOOK_TCP_INPACKET_PCB(pcb, hdr, optlen, opt1len, opt2, p) tcp_md5_check_inpacket(pcb, hdr, optlen, opt1len, opt2, p)
|
---|
33 | * #define LWIP_HOOK_TCP_OPT_LENGTH_SEGMENT(pcb, internal_len) tcp_md5_get_additional_option_length(pcb, internal_len)
|
---|
34 | * #define LWIP_HOOK_TCP_ADD_TX_OPTIONS(p, hdr, pcb, opts) tcp_md5_add_tx_options(p, hdr, pcb, opts)
|
---|
35 | *
|
---|
36 | * #define LWIP_HOOK_SOCKETS_SETSOCKOPT(s, sock, level, optname, optval, optlen, err) tcp_md5_setsockopt_hook(sock, level, optname, optval, optlen, err)
|
---|
37 | */
|
---|
38 |
|
---|
39 | #ifndef LWIP_HDR_CONTRIB_ADDONS_TCP_MD5_H
|
---|
40 | #define LWIP_HDR_CONTRIB_ADDONS_TCP_MD5_H
|
---|
41 |
|
---|
42 | #include "lwip/opt.h"
|
---|
43 | #include "lwip/ip_addr.h"
|
---|
44 | #include "lwip/err.h"
|
---|
45 |
|
---|
46 | #include "lwip/priv/sockets_priv.h"
|
---|
47 | #include "lwip/priv/tcp_priv.h"
|
---|
48 |
|
---|
49 | #ifdef __cplusplus
|
---|
50 | extern "C" {
|
---|
51 | #endif
|
---|
52 |
|
---|
53 | /* setsockopt definitions and structs: */
|
---|
54 |
|
---|
55 | /* This is the optname (for level = IPPROTO_TCP) */
|
---|
56 | #ifndef TCP_MD5SIG
|
---|
57 | #define TCP_MD5SIG 14
|
---|
58 | #endif
|
---|
59 |
|
---|
60 | #define TCP_MD5SIG_MAXKEYLEN 80
|
---|
61 |
|
---|
62 | /* This is the optval type */
|
---|
63 | struct tcp_md5sig {
|
---|
64 | struct sockaddr_storage tcpm_addr;
|
---|
65 | u16_t __tcpm_pad1;
|
---|
66 | u16_t tcpm_keylen;
|
---|
67 | u32_t __tcpm_pad2;
|
---|
68 | u8_t tcpm_key[TCP_MD5SIG_MAXKEYLEN];
|
---|
69 | };
|
---|
70 |
|
---|
71 | /* socket setsockopt hook: */
|
---|
72 | int tcp_md5_setsockopt_hook(struct lwip_sock *sock, int level, int optname, const void *optval, u32_t optlen, int *err);
|
---|
73 |
|
---|
74 | /* Internal hook functions */
|
---|
75 | void tcp_md5_init(void);
|
---|
76 | err_t tcp_md5_check_inpacket(struct tcp_pcb* pcb, struct tcp_hdr *hdr, u16_t optlen, u16_t opt1len, u8_t *opt2, struct pbuf *p);
|
---|
77 | u8_t tcp_md5_get_additional_option_length(const struct tcp_pcb *pcb, u8_t internal_option_length);
|
---|
78 | u32_t *tcp_md5_add_tx_options(struct pbuf *p, struct tcp_hdr *hdr, const struct tcp_pcb *pcb, u32_t *opts);
|
---|
79 |
|
---|
80 | #ifdef __cplusplus
|
---|
81 | }
|
---|
82 | #endif
|
---|
83 |
|
---|
84 | #endif /* LWIP_HDR_CONTRIB_ADDONS_TCP_MD5_H */
|
---|