[457] | 1 | /*
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| 2 | * Copyright (c) 2018 Simon Goldschmidt
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without modification,
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| 6 | * are permitted provided that the following conditions are met:
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| 7 | *
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| 8 | * 1. Redistributions of source code must retain the above copyright notice,
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| 9 | * this list of conditions and the following disclaimer.
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 11 | * this list of conditions and the following disclaimer in the documentation
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| 12 | * and/or other materials provided with the distribution.
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| 13 | * 3. The name of the author may not be used to endorse or promote products
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| 14 | * derived from this software without specific prior written permission.
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| 15 | *
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| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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| 19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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| 20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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| 21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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| 24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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| 25 | * OF SUCH DAMAGE.
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| 26 | *
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| 27 | * Author: Simon Goldschmidt <goldsimon@gmx.de>
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| 28 | *
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| 29 | * To use the hooks in this file, make sure this file is included in LWIP_HOOK_FILENAME
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| 30 | * and define these hooks:
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| 31 | *
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| 32 | * #define LWIP_HOOK_TCP_INPACKET_PCB(pcb, hdr, optlen, opt1len, opt2, p) tcp_md5_check_inpacket(pcb, hdr, optlen, opt1len, opt2, p)
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| 33 | * #define LWIP_HOOK_TCP_OPT_LENGTH_SEGMENT(pcb, internal_len) tcp_md5_get_additional_option_length(pcb, internal_len)
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| 34 | * #define LWIP_HOOK_TCP_ADD_TX_OPTIONS(p, hdr, pcb, opts) tcp_md5_add_tx_options(p, hdr, pcb, opts)
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| 35 | *
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| 36 | * #define LWIP_HOOK_SOCKETS_SETSOCKOPT(s, sock, level, optname, optval, optlen, err) tcp_md5_setsockopt_hook(sock, level, optname, optval, optlen, err)
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| 37 | */
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| 38 |
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| 39 | #ifndef LWIP_HDR_CONTRIB_ADDONS_TCP_MD5_H
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| 40 | #define LWIP_HDR_CONTRIB_ADDONS_TCP_MD5_H
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| 41 |
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| 42 | #include "lwip/opt.h"
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| 43 | #include "lwip/ip_addr.h"
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| 44 | #include "lwip/err.h"
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| 45 |
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| 46 | #include "lwip/priv/sockets_priv.h"
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| 47 | #include "lwip/priv/tcp_priv.h"
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| 48 |
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| 49 | #ifdef __cplusplus
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| 50 | extern "C" {
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| 51 | #endif
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| 52 |
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| 53 | /* setsockopt definitions and structs: */
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| 54 |
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| 55 | /* This is the optname (for level = IPPROTO_TCP) */
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| 56 | #ifndef TCP_MD5SIG
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| 57 | #define TCP_MD5SIG 14
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| 58 | #endif
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| 59 |
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| 60 | #define TCP_MD5SIG_MAXKEYLEN 80
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| 61 |
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| 62 | /* This is the optval type */
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| 63 | struct tcp_md5sig {
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| 64 | struct sockaddr_storage tcpm_addr;
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| 65 | u16_t __tcpm_pad1;
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| 66 | u16_t tcpm_keylen;
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| 67 | u32_t __tcpm_pad2;
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| 68 | u8_t tcpm_key[TCP_MD5SIG_MAXKEYLEN];
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| 69 | };
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| 70 |
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| 71 | /* socket setsockopt hook: */
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| 72 | int tcp_md5_setsockopt_hook(struct lwip_sock *sock, int level, int optname, const void *optval, u32_t optlen, int *err);
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| 73 |
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| 74 | /* Internal hook functions */
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| 75 | void tcp_md5_init(void);
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| 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);
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| 77 | u8_t tcp_md5_get_additional_option_length(const struct tcp_pcb *pcb, u8_t internal_option_length);
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| 78 | u32_t *tcp_md5_add_tx_options(struct pbuf *p, struct tcp_hdr *hdr, const struct tcp_pcb *pcb, u32_t *opts);
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| 79 |
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| 80 | #ifdef __cplusplus
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| 81 | }
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| 82 | #endif
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| 83 |
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| 84 | #endif /* LWIP_HDR_CONTRIB_ADDONS_TCP_MD5_H */
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