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85 lines
3.4 KiB
C
85 lines
3.4 KiB
C
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/*
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* Copyright (c) 2018 Simon Goldschmidt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* Author: Simon Goldschmidt <goldsimon@gmx.de>
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*
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* To use the hooks in this file, make sure this file is included in LWIP_HOOK_FILENAME
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* and define these hooks:
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*
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* #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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* #define LWIP_HOOK_TCP_OPT_LENGTH_SEGMENT(pcb, internal_len) tcp_md5_get_additional_option_length(pcb, internal_len)
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* #define LWIP_HOOK_TCP_ADD_TX_OPTIONS(p, hdr, pcb, opts) tcp_md5_add_tx_options(p, hdr, pcb, opts)
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*
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* #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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*/
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#ifndef LWIP_HDR_CONTRIB_ADDONS_TCP_MD5_H
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#define LWIP_HDR_CONTRIB_ADDONS_TCP_MD5_H
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#include "lwip/opt.h"
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#include "lwip/ip_addr.h"
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#include "lwip/err.h"
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#include "lwip/priv/sockets_priv.h"
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#include "lwip/priv/tcp_priv.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* setsockopt definitions and structs: */
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/* This is the optname (for level = IPPROTO_TCP) */
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#ifndef TCP_MD5SIG
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#define TCP_MD5SIG 14
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#endif
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#define TCP_MD5SIG_MAXKEYLEN 80
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/* This is the optval type */
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struct tcp_md5sig {
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struct sockaddr_storage tcpm_addr;
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u16_t __tcpm_pad1;
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u16_t tcpm_keylen;
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u32_t __tcpm_pad2;
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u8_t tcpm_key[TCP_MD5SIG_MAXKEYLEN];
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};
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/* socket setsockopt hook: */
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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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/* Internal hook functions */
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void tcp_md5_init(void);
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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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u8_t tcp_md5_get_additional_option_length(const struct tcp_pcb *pcb, u8_t internal_option_length);
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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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#ifdef __cplusplus
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}
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#endif
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#endif /* LWIP_HDR_CONTRIB_ADDONS_TCP_MD5_H */
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