ng_icmpv6_echo: fix unexpected parameter problem
ng_icmpv6_echo: fix unexpected parameter problem

Previously it could happen, that the pinging node had send more then one
packet before the reply was received. This would cause the sequence
number to be bigger than expected on receive.

This fixes this problem by introducing a window of expected echo sequence
numbers.

malosek/RIOT,msolters/RIOT,Lexandro92/RIOT-CoAP,asanka-code/RIOT,kYc0o/RIOT,patkan/RIOT,gebart/RIOT,authmillenon/RIOT,hamilton-mote/RIOT-OS,kb2ma/RIOT,OTAkeys/RIOT,mtausig/RIOT,mfrey/RIOT,cladmi/RIOT,OTAkeys/RIOT,alignan/RIOT,shady33/RIOT,Hyungsin/RIOT-OS,marcosalm/RIOT,jfischer-phytec-iot/RIOT,daniel-k/RIOT,rousselk/RIOT,msolters/RIOT,kb2ma/RIOT,altairpearl/RIOT,ThanhVic/RIOT,patkan/RIOT,neiljay/RIOT,kaspar030/RIOT,thiagohd/RIOT,attdona/RIOT,malosek/RIOT,Darredevil/RIOT,ntrtrung/RIOT,MohmadAyman/RIOT,LudwigOrtmann/RIOT,haoyangyu/RIOT,attdona/RIOT,backenklee/RIOT,chris-wood/RIOT,patkan/RIOT,plushvoxel/RIOT,l3nko/RIOT,sumanpanchal/RIOT,patkan/RIOT,marcosalm/RIOT,Osblouf/RIOT,EmuxEvans/RIOT,asanka-code/RIOT,Ell-i/RIOT,kbumsik/RIOT,RBartz/RIOT,d00616/RIOT,alignan/RIOT,brettswann/RIOT,binarylemon/RIOT,abp719/RIOT,smlng/RIOT,Osblouf/RIOT,dhruvvyas90/RIOT,jremmert-phytec-iot/RIOT,gbarnett/RIOT,rfuentess/RIOT,immesys/RiSyn,l3nko/RIOT,LudwigOrtmann/RIOT,PSHIVANI/Riot-Code,chris-wood/RIOT,hamilton-mote/RIOT-OS,sumanpanchal/RIOT,kaleb-himes/RIOT,LudwigKnuepfer/RIOT,luciotorre/RIOT,daniel-k/RIOT,arvindpdmn/RIOT,JensErdmann/RIOT,rousselk/RIOT,adrianghc/RIOT,authmillenon/RIOT,toonst/RIOT,mfrey/RIOT,LudwigKnuepfer/RIOT,dhruvvyas90/RIOT,latsku/RIOT,hamilton-mote/RIOT-OS,miri64/RIOT,LudwigOrtmann/RIOT,chris-wood/RIOT,backenklee/RIOT,JensErdmann/RIOT,MarkXYang/RIOT,herrfz/RIOT,avmelnikoff/RIOT,dailab/RIOT,wentaoshang/RIOT,openkosmosorg/RIOT,MohmadAyman/RIOT,altairpearl/RIOT,rousselk/RIOT,rakendrathapa/RIOT,mfrey/RIOT,ant9000/RIOT,OlegHahm/RIOT,roberthartung/RIOT,rakendrathapa/RIOT,Lexandro92/RIOT-CoAP,x3ro/RIOT,kushalsingh007/RIOT,changbiao/RIOT,rfuentess/RIOT,immesys/RiSyn,BytesGalore/RIOT,MarkXYang/RIOT,aeneby/RIOT,kerneltask/RIOT,khhhh/RIOT,khhhh/RIOT,PSHIVANI/Riot-Code,kaspar030/RIOT,jfischer-phytec-iot/RIOT,luciotorre/RIOT,josephnoir/RIOT,thomaseichinger/RIOT,ximus/RIOT,thiagohd/RIOT,roberthartung/RIOT,stevenj/RIOT,beurdouche/RIOT,yogo1212/RIOT,kbumsik/RIOT,FrancescoErmini/RIOT,Darredevil/RIOT,katezilla/RIOT,mfrey/RIOT,luciotorre/RIOT,lebrush/RIOT,haoyangyu/RIOT,jasonatran/RIOT,basilfx/RIOT,Josar/RIOT,RIOT-OS/RIOT,MonsterCode8000/RIOT,herrfz/RIOT,mtausig/RIOT,tdautc19841202/RIOT,gebart/RIOT,ks156/RIOT,ant9000/RIOT,x3ro/RIOT,adrianghc/RIOT,kb2ma/RIOT,rakendrathapa/RIOT,smlng/RIOT,jremmert-phytec-iot/RIOT,cladmi/RIOT,sumanpanchal/RIOT,gbarnett/RIOT,kerneltask/RIOT,abkam07/RIOT,Hyungsin/RIOT-OS,gebart/RIOT,jbeyerstedt/RIOT-OTA-update,miri64/RIOT,Yonezawa-T2/RIOT,zhuoshuguo/RIOT,openkosmosorg/RIOT,MarkXYang/RIOT,dhruvvyas90/RIOT,stevenj/RIOT,kaspar030/RIOT,alex1818/RIOT,smlng/RIOT,syin2/RIOT,aeneby/RIOT,adrianghc/RIOT,mziegert/RIOT,tdautc19841202/RIOT,backenklee/RIOT,changbiao/RIOT,adjih/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,daniel-k/RIOT,LudwigKnuepfer/RIOT,openkosmosorg/RIOT,OTAkeys/RIOT,kb2ma/RIOT,watr-li/RIOT,avmelnikoff/RIOT,kaleb-himes/RIOT,jbeyerstedt/RIOT-OTA-update,latsku/RIOT,A-Paul/RIOT,backenklee/RIOT,haoyangyu/RIOT,Hyungsin/RIOT-OS,dailab/RIOT,abkam07/RIOT,changbiao/RIOT,alignan/RIOT,alex1818/RIOT,shady33/RIOT,ant9000/RIOT,stevenj/RIOT,d00616/RIOT,tfar/RIOT,mziegert/RIOT,FrancescoErmini/RIOT,brettswann/RIOT,herrfz/RIOT,gbarnett/RIOT,RIOT-OS/RIOT,MohmadAyman/RIOT,changbiao/RIOT,watr-li/RIOT,bartfaizoltan/RIOT,DipSwitch/RIOT,wentaoshang/RIOT,rfuentess/RIOT,mtausig/RIOT,latsku/RIOT,neumodisch/RIOT,RBartz/RIOT,altairpearl/RIOT,changbiao/RIOT,toonst/RIOT,kaleb-himes/RIOT,thiagohd/RIOT,MonsterCode8000/RIOT,haoyangyu/RIOT,abp719/RIOT,thomaseichinger/RIOT,roberthartung/RIOT,shady33/RIOT,marcosalm/RIOT,ThanhVic/RIOT,lebrush/RIOT,asanka-code/RIOT,binarylemon/RIOT,ThanhVic/RIOT,ntrtrung/RIOT,miri64/RIOT,RubikonAlpha/RIOT,avmelnikoff/RIOT,abp719/RIOT,JensErdmann/RIOT,hamilton-mote/RIOT-OS,josephnoir/RIOT,centurysys/RIOT,FrancescoErmini/RIOT,lebrush/RIOT,yogo1212/RIOT,attdona/RIOT,Osblouf/RIOT,koenning/RIOT,neiljay/RIOT,beurdouche/RIOT,OlegHahm/RIOT,neumodisch/RIOT,neiljay/RIOT,ntrtrung/RIOT,ntrtrung/RIOT,l3nko/RIOT,khhhh/RIOT,plushvoxel/RIOT,yogo1212/RIOT,gebart/RIOT,syin2/RIOT,hamilton-mote/RIOT-OS,gautric/RIOT,JensErdmann/RIOT,altairpearl/RIOT,Josar/RIOT,adrianghc/RIOT,neumodisch/RIOT,mtausig/RIOT,stevenj/RIOT,EmuxEvans/RIOT,kaspar030/RIOT,binarylemon/RIOT,automote/RIOT,gbarnett/RIOT,plushvoxel/RIOT,MohmadAyman/RIOT,MarkXYang/RIOT,tdautc19841202/RIOT,khhhh/RIOT,jasonatran/RIOT,koenning/RIOT,malosek/RIOT,khhhh/RIOT,watr-li/RIOT,ThanhVic/RIOT,immesys/RiSyn,kb2ma/RIOT,attdona/RIOT,asanka-code/RIOT,stevenj/RIOT,A-Paul/RIOT,l3nko/RIOT,katezilla/RIOT,tdautc19841202/RIOT,dkm/RIOT,basilfx/RIOT,kushalsingh007/RIOT,alex1818/RIOT,latsku/RIOT,ks156/RIOT,kbumsik/RIOT,biboc/RIOT,toonst/RIOT,tfar/RIOT,x3ro/RIOT,alignan/RIOT,bartfaizoltan/RIOT,rfuentess/RIOT,herrfz/RIOT,abp719/RIOT,ant9000/RIOT,ntrtrung/RIOT,ximus/RIOT,plushvoxel/RIOT,gautric/RIOT,attdona/RIOT,arvindpdmn/RIOT,koenning/RIOT,biboc/RIOT,x3ro/RIOT,miri64/RIOT,smlng/RIOT,gbarnett/RIOT,RubikonAlpha/RIOT,LudwigOrtmann/RIOT,ThanhVic/RIOT,rousselk/RIOT,lebrush/RIOT,basilfx/RIOT,msolters/RIOT,neiljay/RIOT,gautric/RIOT,daniel-k/RIOT,yogo1212/RIOT,lazytech-org/RIOT,thomaseichinger/RIOT,ant9000/RIOT,patkan/RIOT,malosek/RIOT,brettswann/RIOT,robixnai/RIOT,centurysys/RIOT,kYc0o/RIOT,luciotorre/RIOT,biboc/RIOT,MarkXYang/RIOT,marcosalm/RIOT,Ell-i/RIOT,jfischer-phytec-iot/RIOT,changbiao/RIOT,chris-wood/RIOT,zhuoshuguo/RIOT,TobiasFredersdorf/RIOT,syin2/RIOT,LudwigOrtmann/RIOT,neumodisch/RIOT,koenning/RIOT,cladmi/RIOT,kYc0o/RIOT,sumanpanchal/RIOT,dhruvvyas90/RIOT,kerneltask/RIOT,d00616/RIOT,Yonezawa-T2/RIOT,malosek/RIOT,haoyangyu/RIOT,automote/RIOT,DipSwitch/RIOT,authmillenon/RIOT,dkm/RIOT,thiagohd/RIOT,kaspar030/RIOT,kushalsingh007/RIOT,Lexandro92/RIOT-CoAP,RBartz/RIOT,alignan/RIOT,openkosmosorg/RIOT,openkosmosorg/RIOT,zhuoshuguo/RIOT,RubikonAlpha/RIOT,Josar/RIOT,Darredevil/RIOT,FrancescoErmini/RIOT,mziegert/RIOT,kushalsingh007/RIOT,MarkXYang/RIOT,mziegert/RIOT,Hyungsin/RIOT-OS,d00616/RIOT,RBartz/RIOT,tfar/RIOT,kaleb-himes/RIOT,PSHIVANI/Riot-Code,yogo1212/RIOT,jasonatran/RIOT,patkan/RIOT,Darredevil/RIOT,gbarnett/RIOT,rajma996/RIOT,alex1818/RIOT,OTAkeys/RIOT,abp719/RIOT,basilfx/RIOT,ximus/RIOT,LudwigKnuepfer/RIOT,automote/RIOT,MonsterCode8000/RIOT,watr-li/RIOT,ximus/RIOT,mtausig/RIOT,jfischer-phytec-iot/RIOT,TobiasFredersdorf/RIOT,MonsterCode8000/RIOT,aeneby/RIOT,MohmadAyman/RIOT,openkosmosorg/RIOT,zhuoshuguo/RIOT,TobiasFredersdorf/RIOT,dhruvvyas90/RIOT,abkam07/RIOT,FrancescoErmini/RIOT,alex1818/RIOT,smlng/RIOT,mziegert/RIOT,katezilla/RIOT,jremmert-phytec-iot/RIOT,RIOT-OS/RIOT,brettswann/RIOT,toonst/RIOT,sumanpanchal/RIOT,PSHIVANI/Riot-Code,beurdouche/RIOT,RIOT-OS/RIOT,ntrtrung/RIOT,kYc0o/RIOT,luciotorre/RIOT,EmuxEvans/RIOT,x3ro/RIOT,bartfaizoltan/RIOT,thiagohd/RIOT,toonst/RIOT,lazytech-org/RIOT,Yonezawa-T2/RIOT,malosek/RIOT,josephnoir/RIOT,PSHIVANI/Riot-Code,chris-wood/RIOT,zhuoshuguo/RIOT,herrfz/RIOT,robixnai/RIOT,kerneltask/RIOT,cladmi/RIOT,Hyungsin/RIOT-OS,adjih/RIOT,immesys/RiSyn,arvindpdmn/RIOT,adrianghc/RIOT,jbeyerstedt/RIOT-OTA-update,abkam07/RIOT,arvindpdmn/RIOT,lebrush/RIOT,Yonezawa-T2/RIOT,centurysys/RIOT,LudwigOrtmann/RIOT,BytesGalore/RIOT,altairpearl/RIOT,A-Paul/RIOT,automote/RIOT,wentaoshang/RIOT,d00616/RIOT,Yonezawa-T2/RIOT,DipSwitch/RIOT,Darredevil/RIOT,LudwigKnuepfer/RIOT,adjih/RIOT,roberthartung/RIOT,katezilla/RIOT,tdautc19841202/RIOT,OlegHahm/RIOT,lebrush/RIOT,RubikonAlpha/RIOT,MonsterCode8000/RIOT,DipSwitch/RIOT,khhhh/RIOT,jfischer-phytec-iot/RIOT,koenning/RIOT,biboc/RIOT,kbumsik/RIOT,marcosalm/RIOT,rakendrathapa/RIOT,l3nko/RIOT,gautric/RIOT,marcosalm/RIOT,centurysys/RIOT,rousselk/RIOT,BytesGalore/RIOT,EmuxEvans/RIOT,DipSwitch/RIOT,dhruvvyas90/RIOT,haoyangyu/RIOT,tfar/RIOT,miri64/RIOT,TobiasFredersdorf/RIOT,neumodisch/RIOT,wentaoshang/RIOT,backenklee/RIOT,bartfaizoltan/RIOT,cladmi/RIOT,thomaseichinger/RIOT,robixnai/RIOT,Osblouf/RIOT,ximus/RIOT,jasonatran/RIOT,tfar/RIOT,Yonezawa-T2/RIOT,ThanhVic/RIOT,koenning/RIOT,rousselk/RIOT,kushalsingh007/RIOT,OlegHahm/RIOT,MonsterCode8000/RIOT,EmuxEvans/RIOT,immesys/RiSyn,robixnai/RIOT,dkm/RIOT,beurdouche/RIOT,mziegert/RIOT,kbumsik/RIOT,neiljay/RIOT,BytesGalore/RIOT,RubikonAlpha/RIOT,avmelnikoff/RIOT,DipSwitch/RIOT,rajma996/RIOT,avmelnikoff/RIOT,bartfaizoltan/RIOT,shady33/RIOT,rajma996/RIOT,A-Paul/RIOT,plushvoxel/RIOT,Osblouf/RIOT,kushalsingh007/RIOT,roberthartung/RIOT,daniel-k/RIOT,Ell-i/RIOT,dkm/RIOT,RubikonAlpha/RIOT,FrancescoErmini/RIOT,dailab/RIOT,Osblouf/RIOT,msolters/RIOT,latsku/RIOT,beurdouche/RIOT,authmillenon/RIOT,binarylemon/RIOT,thomaseichinger/RIOT,kerneltask/RIOT,yogo1212/RIOT,Lexandro92/RIOT-CoAP,rajma996/RIOT,TobiasFredersdorf/RIOT,OTAkeys/RIOT,abp719/RIOT,automote/RIOT,luciotorre/RIOT,chris-wood/RIOT,ks156/RIOT,Ell-i/RIOT,latsku/RIOT,EmuxEvans/RIOT,lazytech-org/RIOT,herrfz/RIOT,jremmert-phytec-iot/RIOT,brettswann/RIOT,adjih/RIOT,bartfaizoltan/RIOT,alex1818/RIOT,jremmert-phytec-iot/RIOT,RBartz/RIOT,wentaoshang/RIOT,PSHIVANI/Riot-Code,centurysys/RIOT,asanka-code/RIOT,thiagohd/RIOT,Josar/RIOT,Darredevil/RIOT,arvindpdmn/RIOT,wentaoshang/RIOT,dailab/RIOT,jbeyerstedt/RIOT-OTA-update,jasonatran/RIOT,immesys/RiSyn,RIOT-OS/RIOT,arvindpdmn/RIOT,Ell-i/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,JensErdmann/RIOT,binarylemon/RIOT,biboc/RIOT,kaleb-himes/RIOT,tdautc19841202/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,lazytech-org/RIOT,rajma996/RIOT,jremmert-phytec-iot/RIOT,Josar/RIOT,BytesGalore/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,brettswann/RIOT,shady33/RIOT,gautric/RIOT,watr-li/RIOT,msolters/RIOT,sumanpanchal/RIOT,A-Paul/RIOT,jbeyerstedt/RIOT-OTA-update,RBartz/RIOT,rajma996/RIOT,dailab/RIOT,adjih/RIOT,l3nko/RIOT,katezilla/RIOT,gebart/RIOT,daniel-k/RIOT,binarylemon/RIOT,shady33/RIOT,ks156/RIOT,OlegHahm/RIOT,josephnoir/RIOT,Lexandro92/RIOT-CoAP,josephnoir/RIOT,stevenj/RIOT,abkam07/RIOT,neumodisch/RIOT,MohmadAyman/RIOT,syin2/RIOT,dkm/RIOT,abkam07/RIOT,msolters/RIOT,rakendrathapa/RIOT,ximus/RIOT,lazytech-org/RIOT,automote/RIOT,aeneby/RIOT,rfuentess/RIOT,Lexandro92/RIOT-CoAP,d00616/RIOT,watr-li/RIOT,syin2/RIOT,robixnai/RIOT,ks156/RIOT,kYc0o/RIOT,zhuoshuguo/RIOT,altairpearl/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,mfrey/RIOT,authmillenon/RIOT,authmillenon/RIOT,JensErdmann/RIOT,basilfx/RIOT,rakendrathapa/RIOT,asanka-code/RIOT,centurysys/RIOT,robixnai/RIOT,aeneby/RIOT,attdona/RIOT