summaryrefslogtreecommitdiffstats
path: root/src/nat_check.cpp
blob: 170d2de6a501a0d4c688a3483f09b530c70333a9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
#include <stdint.h>
#include "nat_check.h"
#include "bp_sim.h"
/*
 Hanoh Haim
 Cisco Systems, Inc.
*/

/*
Copyright (c) 2015-2015 Cisco Systems, Inc.

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.
*/


void CGenNodeNatInfo::dump(FILE *fd){

    fprintf(fd," msg_type :  %d \n",m_msg_type);
    int i;
    for (i=0; i<m_cnt; i++) {
        CNatFlowInfo * lp=&m_data[i];
        fprintf (fd," id:%d , external ip:%08x:%x , ex_port: %04x , fid: %d \n",i,lp->m_external_ip,lp->m_external_ip_server,lp->m_external_port,lp->m_fid);
    }
}

void CGenNodeNatInfo::init(){
    m_msg_type= CGenNodeMsgBase::NAT_FIRST;
    m_pad=0;
    m_cnt=0;
}


void CNatStats::reset(){
    m_total_rx=0;
    m_total_msg=0;
    m_err_no_valid_thread_id=0;
    m_err_no_valid_proto=0;
    m_err_queue_full=0;
}


CNatPerThreadInfo * CNatRxManager::get_thread_info(uint8_t thread_id){
    if (thread_id<m_max_threads) {
        return (&m_per_thread[thread_id]);
    }
    m_stats.m_err_no_valid_thread_id++;
    return (0);
}


bool CNatRxManager::Create(){

    m_max_threads = CMsgIns::Ins()->get_num_threads() ;
    m_per_thread = new CNatPerThreadInfo[m_max_threads];
    CMessagingManager * lpm=CMsgIns::Ins()->getRxDp();

    int i;
    for (i=0; i<m_max_threads; i++) {
        m_per_thread[i].m_ring=lpm->getRingCpToDp(i);
        assert(m_per_thread[i].m_ring);
    }



    return (true);
}

void CNatRxManager::Delete(){
    if (m_per_thread) {
        delete m_per_thread;
        m_per_thread=0;
    }
}

void delay(int msec);



/* check this every 1msec */
void CNatRxManager::handle_aging(){
    int i;
    dsec_t now=now_sec();
    for (i=0; i<m_max_threads; i++) {
        CNatPerThreadInfo * thread_info=get_thread_info( i );
        if ( thread_info->m_cur_nat_msg ){
            if ( now - thread_info->m_last_time > MAX_TIME_MSG_IN_QUEUE_SEC ){
                flush_node(thread_info);
            }
        }
    }
}

void CNatRxManager::flush_node(CNatPerThreadInfo * thread_info){
        // try send 
        int cnt=0;
        while (true) {
            if ( thread_info->m_ring->Enqueue((CGenNode*)thread_info->m_cur_nat_msg) == 0 ){
                #ifdef NAT_TRACE_
                printf("send message \n");
                #endif
                break;
            }
            m_stats.m_err_queue_full++;
            delay(1);
            cnt++;
            if (cnt>10) {
                printf(" ERROR  queue from rx->dp is stuck, somthing is wrong here \n");
                exit(1);
            }
        }
        /* msg will be free by sink */
        thread_info->m_cur_nat_msg=0;
}


void CNatRxManager::handle_packet_ipv4(CNatOption * option,
                                  IPHeader * ipv4){

    CNatPerThreadInfo * thread_info=get_thread_info(option->get_thread_id());
    if (!thread_info) {
        return;
    }
    /* Extract info from the packet ! */
    uint32_t ext_ip   = ipv4->getSourceIp();
    uint32_t ext_ip_server = ipv4->getDestIp();
    uint8_t proto     = ipv4->getProtocol();
    /* must be TCP/UDP this is the only supported proto */
    if (!( (proto==6) || (proto==17) )){
        m_stats.m_err_no_valid_proto++;
        return;
    }
    /* we support only TCP/UDP so take the source port , post IP header */
    UDPHeader * udp= (UDPHeader *) (((char *)ipv4)+ ipv4->getHeaderLength());
    uint16_t ext_port = udp->getSourcePort();
    #ifdef NAT_TRACE_
    printf("rx msg ext ip : %08x:%08x ext port : %04x  flow_id : %d \n",ext_ip,ext_ip_server,ext_port,option->get_fid());
    #endif


    CGenNodeNatInfo * node=thread_info->m_cur_nat_msg;
    if ( !node ){
        node = (CGenNodeNatInfo * )CGlobalInfo::create_node();
        assert(node);
        node->init();
        thread_info->m_cur_nat_msg = node;
        thread_info->m_last_time   = now_sec();
    }
    /* get message */
    CNatFlowInfo * msg=node->get_next_msg();

    /* fill the message */
    msg->m_external_ip   = ext_ip;
    msg->m_external_ip_server = ext_ip_server;
    msg->m_external_port = ext_port;
    msg->m_fid           = option->get_fid();
    msg->m_pad           = 0xee; 

    if ( node->is_full() ){
        flush_node(thread_info);
    }
}


#define MYDP(f) if (f)  fprintf(fd," %-40s: %llu \n",#f,(unsigned long long)f)
#define MYDP_A(f)     fprintf(fd," %-40s: %llu \n",#f, (unsigned long long)f)



void CNatStats::Dump(FILE *fd){
   MYDP(m_total_rx);
   MYDP(m_total_msg);
   MYDP(m_err_no_valid_thread_id);
   MYDP(m_err_no_valid_proto);
   MYDP(m_err_queue_full);
}


void CNatRxManager::Dump(FILE *fd){
    m_stats.Dump(stdout);
}

void CNatRxManager::DumpShort(FILE *fd){
    fprintf(fd,"nat check msgs: %lu,  errors: %lu  \n",m_stats.m_total_msg,m_stats.get_errs() );
}