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/* librist. Copyright © 2020 SipRadius LLC. All right reserved.
* Author: Sergio Ammirata, Ph.D. <sergio@ammirata.net>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "common/attributes.h"
#include <librist/udpsocket.h>
#define RIST_IPH_GET_VER(v) (((v) >> 4) & 0x0F)
#define RIST_OOB_API_IP_PROTOCOL 252
#define RIST_OOB_API_IP_IDENT_AUTH 54321
#define RIST_OOB_ERROR_INVALID_LENGTH -1
#define RIST_OOB_ERROR_INVALID_PROTO -2
#define RIST_OOB_ERROR_INVALID_IDENT -3
// The IPv4 header's structure (20 bytes)
RIST_PACKED_STRUCT(ipheader, {
unsigned char iph_verlen;
unsigned char iph_tos;
unsigned short int iph_len;
unsigned short int iph_ident;
unsigned short int iph_flags;
unsigned char iph_ttl;
unsigned char iph_protocol;
unsigned short int iph_chksum;
unsigned int iph_sourceip;
unsigned int iph_destip;
})
// UDP header's structure (8 bytes)
RIST_PACKED_STRUCT(udpheader, {
unsigned short int udph_srcport;
unsigned short int udph_destport;
unsigned short int udph_len;
unsigned short int udph_chksum;
})
void populate_ipv4_rist_header(unsigned short int address_family, unsigned char *recv_buf, ssize_t recv_bufsize, struct sockaddr * addr, socklen_t addrlen);
int oob_build_api_payload(char *buffer, char *sourceip, char *destip, char *message, int message_len);
char *oob_process_api_message(int buffer_len, char *buffer, int *message_len);
#ifdef USE_TUN
int oob_setup_tun_device(char *oobtun);
#endif
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