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/*
// Copyright (c) 2017 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/
#ifndef __INCLUDE_LIB_ALG_H__
#define __INCLUDE_LIB_ALG_H__
#include "rte_ether.h"
uint16_t sip_session_number;/* SIP session count */
#define IS_STRING_SAME(pStr, strId) (bcmp((pStr), strId, strlen(strId)) == 0)
#define TAG_TO_DATAPOS(str) (strlen(str) + 1)
#define SKIP_SPACES(pStr) \
{ \
while (*(char *)(pStr) == ' ') \
(char *)(pStr)++; \
}
enum pkt_dir {PRIVATE, PUBLIC};
/* enum for SIP Call direction - NAT ALG */
enum sip_alg_call_direction {
SIP_CALL_INCOMING, /* Incoming call public to private */
SIP_CALL_OUTGOING /* Outgoing call private to public */
};
/* enum of SIP port type - NAT ALG */
enum sip_alg_port_type {
SIP_UDP, /* SIP SDP port 5460 */
SIP_RTP, /* RTP port number */
SIP_RTCP /* RTCP port number */
};
/*
* Data structure for NAT SIP ALG table key
* Key - IP address & L4 port number.
*/
struct sip_alg_key {
/*
* IP address based on direction.
* outgoing - public IP, incoming - destinatio IP of pkt
*/
uint32_t ip_address;
uint16_t l4port; /* SIP SDP, RTP, RTCP port number */
uint8_t filler1;
uint8_t filler2;
};
/*
* Data structure for NAT SIP ALG table entry.
* Placeholder for storing SIP ALG entries.
*/
struct sip_alg_table_entry {
uint32_t ip_address;
/*
* IP address based on direction.
* outgoing - public IP, incoming - destinatio IP of pkt
*/
uint16_t l4port; /* SIP UDP (5061), RTP, RTCP port number */
uint8_t sip_alg_call_direction;
/* Call incoming (pub to prv) or outgoing (prv to pub) */
uint8_t sip_alg_call_id[100];/* unique identfier for a SIP call */
uint8_t l4port_type;/* SIP_UDP or RTP or RTCP */
uint8_t filler1;
uint16_t filler2;
uint32_t filler3;
} __rte_cache_aligned;
/* Function declarations */
/**
* To initalize SIP ALG library and should be called-
* - before other SIP ALG library funcitons
* @param params
* pipeline parameter structure pointer
* @param app
* pipeline application conext structure pointer
* @return
* void return
*/
void lib_sip_alg_init(void);
/**
* Main SIP ALG DPI function for processing SIP ALG functionlity
* @param pkt
* mbuf packet pointer
* @param pkt_direction
* Indicates whether pkt is from PRIVATE or PUBLIC direction
* @param modIp
* NAPT tranlated IP address based on direction
* @param modL4Port
* NAPT translated L4 port based on direction
* @param pubIP
* Original IP address before translation
* @param pubL4Port
* Original L4 port before translation
* @param modRtpPort
* RTP port
* @param modRtcpPort
* RTCP port
* @return
* 0 means success, -1 means failure
*/
int sip_alg_dpi(struct rte_mbuf *pkt, enum pkt_dir pkt_direction,
uint32_t modIp, uint16_t modL4Port,
uint32_t pubIp, uint16_t pubL4Port,
uint16_t modRtpPort, uint16_t modRtcpPort);
/**
* To get audio ports from SIP Packet
* @param pkt
* mbuf packet pointer
* @param rtpPort
* rtp port in parameter
* @param rtcpPort
* rtcp port in parameter
* @return
* 0 means success, -1 means failre
*/
int natSipAlgGetAudioPorts(
struct rte_mbuf *pkt,
uint16_t *rtpPort,
uint16_t *rtcp_port);
int natSipAlgMsgFieldPos(
char *pData,
const char *pIdStr,
int *pos,
int searchLen);
int natSipAlgMsgFieldPosFindCrlf(
char *pData,
const char *pIdStr,
int *pPos,
int searchLen);
int natSipAlgMsgFieldPosFindSpace(
char *pData,
const char *pIdStr,
int *pPos,
int searchLen);
int remove_sip_alg_entry(
uint32_t ipaddr,
uint16_t portid);
#endif
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