net/ip: apply workaround to fix IP forwarding
net/ip: apply workaround to fix IP forwarding

When sending a packet a workaround is applied when ndp_get_ll_address() returns NULL as is's not implemented properly yet.
The same should happen when a packet is forwarded as it's dropped otherwise.

ximus/RIOT,dhruvvyas90/RIOT,automote/RIOT,Lexandro92/RIOT-CoAP,Hyungsin/RIOT-OS,dailab/RIOT,jhollister/RIOT,Lotterleben/RIOT,jferreir/RIOT,daniel-k/RIOT,msolters/RIOT,wentaoshang/RIOT,brettswann/RIOT,daniel-k/RIOT,asanka-code/RIOT,JensErdmann/RIOT,dhruvvyas90/RIOT,automote/RIOT,khhhh/RIOT,mtausig/RIOT,Josar/RIOT,TobiasFredersdorf/RIOT,basilfx/RIOT,1blankz7/RIOT,spium/IoT-RIOT,ntrtrung/RIOT,binarylemon/RIOT,Yonezawa-T2/RIOT,daniel-k/RIOT,aeneby/RIOT,rakendrathapa/RIOT,ThanhVic/RIOT,jasonatran/RIOT,backenklee/RIOT,rousselk/RIOT,OlegHahm/RIOT,Darredevil/RIOT,automote/RIOT,khhhh/RIOT,wentaoshang/RIOT,binarylemon/RIOT,hamilton-mote/RIOT-OS,daniel-k/RIOT,herrfz/RIOT-old,ant9000/RIOT,OlegHahm/RIOT,MohmadAyman/RIOT,LudwigOrtmann/RIOT,Josar/RIOT,thomaseichinger/RIOT,MohmadAyman/RIOT,rousselk/RIOT,dailab/RIOT,centurysys/RIOT,jremmert-phytec-iot/RIOT,adjih/RIOT,msolters/RIOT,abkam07/RIOT,stevenj/RIOT,alignan/RIOT,haoyangyu/RIOT,marcosalm/RIOT,jferreir/RIOT,neiljay/RIOT,Yonezawa-T2/RIOT,sgso/RIOT,thiagohd/RIOT,Lotterleben/RIOT,yogo1212/RIOT,alignan/RIOT,backenklee/RIOT,fnack/RIOT,Darredevil/RIOT,jferreir/RIOT,kerneltask/RIOT,l3nko/RIOT,haoyangyu/RIOT,yogo1212/RIOT,binarylemon/RIOT,Lotterleben/RIOT,AnonMall/RIOT,OTAkeys/RIOT,lebrush/RIOT,jhollister/RIOT,LudwigOrtmann/RIOT,nsol-nmsu/RIOT,thiagohd/RIOT,stevenj/RIOT,rfuentess/RIOT,EmuxEvans/RIOT,aeneby/RIOT,tdautc19841202/RIOT,gbarnett/RIOT,Darredevil/RIOT,Lexandro92/RIOT-CoAP,mfrey/RIOT,rfswarm2/RIOT,plushvoxel/RIOT,Lotterleben/RIOT,haoyangyu/RIOT,Osblouf/RIOT,locicontrols/RIOT,attdona/RIOT,lazytech-org/RIOT,katezilla/RIOT,ks156/RIOT,watr-li/RIOT,patkan/RIOT,rajma996/RIOT,kushalsingh007/RIOT,abkam07/RIOT,neumodisch/RIOT,phiros/RIOT,kYc0o/RIOT,alex1818/RIOT,kaspar030/RIOT,lazytech-org/RIOT,kb2ma/RIOT,roberthartung/RIOT,tfar/RIOT,ros2/ros2_embedded_riot,malosek/RIOT,Yonezawa-T2/RIOT,khhhh/RIOT,chris-wood/RIOT,BytesGalore/PetersRIOT,jferreir/RIOT,rfuentess/RIOT,RIOT-OS/RIOT,mziegert/RIOT,adjih/RIOT,BytesGalore/PetersRIOT,adjih/RIOT,jbeyerstedt/RIOT-OTA-update,d00616/RIOT,changbiao/RIOT,phiros/RIOT,biboc/RIOT,tfar/RIOT,abp719/RIOT,haoyangyu/RIOT,josephnoir/RIOT,locicontrols/RIOT,DipSwitch/RIOT,MohmadAyman/RIOT,BytesGalore/PetersRIOT,asanka-code/RIOT,PSHIVANI/Riot-Code,nsol-nmsu/RIOT,msolters/RIOT,thomaseichinger/RIOT,hamilton-mote/RIOT-OS,1blankz7/RIOT,plushvoxel/RIOT,rfswarm2/RIOT,d00616/RIOT,ximus/RIOT,A-Paul/RIOT,kushalsingh007/RIOT,beurdouche/RIOT,mtausig/RIOT,luciotorre/RIOT,BytesGalore/RIOT,kaleb-himes/RIOT,rajma996/RIOT,RIOT-OS/RIOT,MonsterCode8000/RIOT,rfswarm/RIOT,rajma996/RIOT,MonsterCode8000/RIOT,PSHIVANI/Riot-Code,phiros/RIOT,RBartz/RIOT,benoit-canet/RIOT,jhollister/RIOT,ros2/ros2_embedded_riot,lazytech-org/RIOT,RubikonAlpha/RIOT,avmelnikoff/RIOT,yogo1212/RIOT,AnonMall/RIOT,cladmi/RIOT,patkan/RIOT,kYc0o/RIOT,openkosmosorg/RIOT,josephnoir/RIOT,BytesGalore/RIOT,gebart/RIOT,Yonezawa-T2/RIOT,sumanpanchal/RIOT,x3ro/RIOT,Ell-i/RIOT,spium/IoT-RIOT,jbeyerstedt/RIOT-OTA-update,avmelnikoff/RIOT,watr-li/RIOT,toonst/RIOT,RubikonAlpha/RIOT,neiljay/RIOT,spium/IoT-RIOT,jhollister/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,Lotterleben/RIOT,attdona/RIOT,malosek/RIOT,RIOT-OS/RIOT,PSHIVANI/Riot-Code,latsku/RIOT,MonsterCode8000/RIOT,nsol-nmsu/RIOT,MarkXYang/RIOT,alex1818/RIOT,bartfaizoltan/RIOT,miri64/RIOT,immesys/RiSyn,stevenj/RIOT,kaspar030/RIOT,d00616/RIOT,kerneltask/RIOT,openkosmosorg/RIOT,Lexandro92/RIOT-CoAP,Ell-i/RIOT,MarkXYang/RIOT,LudwigOrtmann/RIOT,automote/RIOT,gautric/RIOT,MarkXYang/RIOT,basilfx/RIOT,phiros/RIOT,tdautc19841202/RIOT,dhruvvyas90/RIOT,RBartz/RIOT,altairpearl/RIOT,gautric/RIOT,zhuoshuguo/RIOT,rfswarm/RIOT,watr-li/RIOT,stevenj/RIOT,bartfaizoltan/RIOT,MarkXYang/RIOT,yogo1212/RIOT,centurysys/RIOT,MarkXYang/RIOT,katezilla/RIOT,FrancescoErmini/RIOT,sgso/RIOT,locicontrols/RIOT,herrfz/RIOT-old,LudwigOrtmann/RIOT,kerneltask/RIOT,beurdouche/RIOT,mtausig/RIOT,Ell-i/RIOT,dkm/RIOT,TobiasFredersdorf/RIOT,OTAkeys/RIOT,gbarnett/RIOT,Lotterleben/RIOT,beurdouche/RIOT,RubikonAlpha/RIOT,watr-li/RIOT,tfar/RIOT,locicontrols/RIOT,ros2/ros2_embedded_riot,automote/RIOT,openkosmosorg/RIOT,PSHIVANI/Riot-Code,MonsterCode8000/RIOT,haoyangyu/RIOT,herrfz/RIOT-old,koenning/RIOT,BytesGalore/PetersRIOT,khhhh/RIOT,MohmadAyman/RIOT,koenning/RIOT,l3nko/RIOT,fnack/RIOT,RubikonAlpha/RIOT,koenning/RIOT,rakendrathapa/RIOT,AnonMall/RIOT,rfswarm/RIOT,aeneby/RIOT,mtausig/RIOT,RubikonAlpha/RIOT,tdautc19841202/RIOT,Osblouf/RIOT,herrfz/RIOT,altairpearl/RIOT,alex1818/RIOT,abkam07/RIOT,malosek/RIOT,rakendrathapa/RIOT,patkan/RIOT,cladmi/RIOT,fnack/RIOT,jbeyerstedt/RIOT-OTA-update,DipSwitch/RIOT,hamilton-mote/RIOT-OS,katezilla/RIOT,marcosalm/RIOT,chris-wood/RIOT,locicontrols/RIOT,TobiasFredersdorf/RIOT,1blankz7/RIOT,spium/IoT-RIOT,kaspar030/RIOT,biboc/RIOT,ximus/RIOT,l3nko/RIOT,biboc/RIOT,fnack/RIOT,Lexandro92/RIOT-CoAP,authmillenon/RIOT,Darredevil/RIOT,neumodisch/RIOT,nsol-nmsu/RIOT,herrfz/RIOT,centurysys/RIOT,fnack/RIOT,robixnai/RIOT,arvindpdmn/RIOT,neiljay/RIOT,gbarnett/RIOT,dhruvvyas90/RIOT,biboc/RIOT,kushalsingh007/RIOT,plushvoxel/RIOT,gbarnett/RIOT,jfischer-phytec-iot/RIOT,josephnoir/RIOT,locicontrols/RIOT,watr-li/RIOT,LudwigOrtmann/RIOT,dhruvvyas90/RIOT,syin2/RIOT,plushvoxel/RIOT,jasonatran/RIOT,herrfz/RIOT,jfischer-phytec-iot/RIOT,hamilton-mote/RIOT-OS,immesys/RiSyn,emmanuelsearch/RIOT,kaleb-himes/RIOT,JensErdmann/RIOT,adrianghc/RIOT,rakendrathapa/RIOT,aeneby/RIOT,roberthartung/RIOT,ros2/ros2_embedded_riot,authmillenon/RIOT,syin2/RIOT,FrancescoErmini/RIOT,ks156/RIOT,kaspar030/RIOT,jhollister/RIOT,rajma996/RIOT,jferreir/RIOT,rfuentess/RIOT,emmanuelsearch/RIOT,rousselk/RIOT,BytesGalore/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,mziegert/RIOT,RBartz/RIOT,syin2/RIOT,wentaoshang/RIOT,lebrush/RIOT,Josar/RIOT,dailab/RIOT,tdautc19841202/RIOT,watr-li/RIOT,latsku/RIOT,rfuentess/RIOT,alex1818/RIOT,changbiao/RIOT,koenning/RIOT,attdona/RIOT,Lotterleben/RIOT,d00616/RIOT,smlng/RIOT,LudwigKnuepfer/RIOT,TobiasFredersdorf/RIOT,jfischer-phytec-iot/RIOT,OTAkeys/RIOT,abkam07/RIOT,adrianghc/RIOT,robixnai/RIOT,lebrush/RIOT,abp719/RIOT,Osblouf/RIOT,luciotorre/RIOT,kaleb-himes/RIOT,asanka-code/RIOT,kushalsingh007/RIOT,1blankz7/RIOT,A-Paul/RIOT,benoit-canet/RIOT,Lexandro92/RIOT-CoAP,smlng/RIOT,EmuxEvans/RIOT,OlegHahm/RIOT,rakendrathapa/RIOT,centurysys/RIOT,shady33/RIOT,jfischer-phytec-iot/RIOT,brettswann/RIOT,OlegHahm/RIOT,adrianghc/RIOT,changbiao/RIOT,toonst/RIOT,jfischer-phytec-iot/RIOT,khhhh/RIOT,rfswarm2/RIOT,LudwigOrtmann/RIOT,thiagohd/RIOT,altairpearl/RIOT,FrancescoErmini/RIOT,rfswarm2/RIOT,ntrtrung/RIOT,kaleb-himes/RIOT,shady33/RIOT,dkm/RIOT,mfrey/RIOT,robixnai/RIOT,centurysys/RIOT,RBartz/RIOT,chris-wood/RIOT,emmanuelsearch/RIOT,chris-wood/RIOT,bartfaizoltan/RIOT,malosek/RIOT,malosek/RIOT,RBartz/RIOT,dkm/RIOT,altairpearl/RIOT,JensErdmann/RIOT,ant9000/RIOT,lebrush/RIOT,backenklee/RIOT,rfswarm2/RIOT,emmanuelsearch/RIOT,kb2ma/RIOT,latsku/RIOT,ros2/ros2_embedded_riot,neiljay/RIOT,OTAkeys/RIOT,BytesGalore/PetersRIOT,l3nko/RIOT,l3nko/RIOT,roberthartung/RIOT,brettswann/RIOT,sgso/RIOT,Hyungsin/RIOT-OS,wentaoshang/RIOT,locicontrols/RIOT,BytesGalore/RIOT,gebart/RIOT,marcosalm/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,alex1818/RIOT,rfuentess/RIOT,kbumsik/RIOT,khhhh/RIOT,d00616/RIOT,mziegert/RIOT,kbumsik/RIOT,attdona/RIOT,RubikonAlpha/RIOT,msolters/RIOT,AnonMall/RIOT,patkan/RIOT,x3ro/RIOT,phiros/RIOT,PSHIVANI/Riot-Code,abp719/RIOT,kushalsingh007/RIOT,jremmert-phytec-iot/RIOT,authmillenon/RIOT,ThanhVic/RIOT,smlng/RIOT,LudwigKnuepfer/RIOT,zhuoshuguo/RIOT,ant9000/RIOT,OlegHahm/RIOT,asanka-code/RIOT,stevenj/RIOT,biboc/RIOT,JensErdmann/RIOT,ntrtrung/RIOT,adrianghc/RIOT,lazytech-org/RIOT,phiros/RIOT,rajma996/RIOT,ros2/ros2_embedded_riot,DipSwitch/RIOT,sgso/RIOT,A-Paul/RIOT,gautric/RIOT,tfar/RIOT,haoyangyu/RIOT,Osblouf/RIOT,abp719/RIOT,arvindpdmn/RIOT,attdona/RIOT,MohmadAyman/RIOT,abp719/RIOT,cladmi/RIOT,alignan/RIOT,ThanhVic/RIOT,Ell-i/RIOT,dhruvvyas90/RIOT,gautric/RIOT,spium/IoT-RIOT,adrianghc/RIOT,neumodisch/RIOT,mtausig/RIOT,shady33/RIOT,hamilton-mote/RIOT-OS,Hyungsin/RIOT-OS,daniel-k/RIOT,kbumsik/RIOT,smlng/RIOT,neiljay/RIOT,adjih/RIOT,authmillenon/RIOT,altairpearl/RIOT,BytesGalore/PetersRIOT,ros2/ros2_embedded_riot,Ell-i/RIOT,gautric/RIOT,rfswarm/RIOT,RBartz/RIOT,jremmert-phytec-iot/RIOT,EmuxEvans/RIOT,AnonMall/RIOT,changbiao/RIOT,ximus/RIOT,latsku/RIOT,LudwigKnuepfer/RIOT,zhuoshuguo/RIOT,kb2ma/RIOT,MarkXYang/RIOT,rfswarm2/RIOT,FrancescoErmini/RIOT,yogo1212/RIOT,MohmadAyman/RIOT,katezilla/RIOT,jremmert-phytec-iot/RIOT,Josar/RIOT,gebart/RIOT,jasonatran/RIOT,MonsterCode8000/RIOT,latsku/RIOT,PSHIVANI/Riot-Code,kaspar030/RIOT,EmuxEvans/RIOT,marcosalm/RIOT,lebrush/RIOT,rakendrathapa/RIOT,ks156/RIOT,miri64/RIOT,josephnoir/RIOT,luciotorre/RIOT,herrfz/RIOT,thiagohd/RIOT,emmanuelsearch/RIOT,A-Paul/RIOT,x3ro/RIOT,herrfz/RIOT-old,backenklee/RIOT,abkam07/RIOT,jferreir/RIOT,ThanhVic/RIOT,patkan/RIOT,x3ro/RIOT,JensErdmann/RIOT,roberthartung/RIOT,luciotorre/RIOT,josephnoir/RIOT,dkm/RIOT,kerneltask/RIOT,FrancescoErmini/RIOT,katezilla/RIOT,smlng/RIOT,backenklee/RIOT,alignan/RIOT,binarylemon/RIOT,rousselk/RIOT,thiagohd/RIOT,toonst/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,syin2/RIOT,avmelnikoff/RIOT,jbeyerstedt/RIOT-OTA-update,ximus/RIOT,avmelnikoff/RIOT,shady33/RIOT,openkosmosorg/RIOT,emmanuelsearch/RIOT,mfrey/RIOT,immesys/RiSyn,DipSwitch/RIOT,marcosalm/RIOT,brettswann/RIOT,chris-wood/RIOT,arvindpdmn/RIOT,attdona/RIOT,ant9000/RIOT,gebart/RIOT,benoit-canet/RIOT,alignan/RIOT,kYc0o/RIOT,RIOT-OS/RIOT,wentaoshang/RIOT,x3ro/RIOT,marcosalm/RIOT,msolters/RIOT,dkm/RIOT,JensErdmann/RIOT,A-Paul/RIOT,mfrey/RIOT,shady33/RIOT,ximus/RIOT,Lexandro92/RIOT-CoAP,rousselk/RIOT,roberthartung/RIOT,arvindpdmn/RIOT,luciotorre/RIOT,sgso/RIOT,OTAkeys/RIOT,adjih/RIOT,openkosmosorg/RIOT,kYc0o/RIOT,zhuoshuguo/RIOT,cladmi/RIOT,centurysys/RIOT,msolters/RIOT,toonst/RIOT,kbumsik/RIOT,rousselk/RIOT,binarylemon/RIOT,herrfz/RIOT,cladmi/RIOT,basilfx/RIOT,benoit-canet/RIOT,spium/IoT-RIOT,wentaoshang/RIOT,LudwigKnuepfer/RIOT,sumanpanchal/RIOT,thomaseichinger/RIOT,bartfaizoltan/RIOT,fnack/RIOT,DipSwitch/RIOT,Osblouf/RIOT,kb2ma/RIOT,AnonMall/RIOT,zhuoshuguo/RIOT,miri64/RIOT,benoit-canet/RIOT,ks156/RIOT,rfswarm/RIOT,Darredevil/RIOT,neumodisch/RIOT,thiagohd/RIOT,robixnai/RIOT,mziegert/RIOT,ntrtrung/RIOT,changbiao/RIOT,changbiao/RIOT,kaleb-himes/RIOT,DipSwitch/RIOT,tdautc19841202/RIOT,rajma996/RIOT,tfar/RIOT,immesys/RiSyn,nsol-nmsu/RIOT,sgso/RIOT,abkam07/RIOT,jbeyerstedt/RIOT-OTA-update,daniel-k/RIOT,altairpearl/RIOT,lebrush/RIOT,1blankz7/RIOT,aeneby/RIOT,luciotorre/RIOT,openkosmosorg/RIOT,BytesGalore/RIOT,immesys/RiSyn,arvindpdmn/RIOT,kerneltask/RIOT,1blankz7/RIOT,EmuxEvans/RIOT,tdautc19841202/RIOT,authmillenon/RIOT,benoit-canet/RIOT,l3nko/RIOT,jasonatran/RIOT,koenning/RIOT,dailab/RIOT,ThanhVic/RIOT,robixnai/RIOT,zhuoshuguo/RIOT,asanka-code/RIOT,miri64/RIOT,shady33/RIOT,sumanpanchal/RIOT,neumodisch/RIOT,TobiasFredersdorf/RIOT,mziegert/RIOT,thomaseichinger/RIOT,LudwigKnuepfer/RIOT,toonst/RIOT,basilfx/RIOT,malosek/RIOT,robixnai/RIOT,sumanpanchal/RIOT,jremmert-phytec-iot/RIOT,plushvoxel/RIOT,jremmert-phytec-iot/RIOT,authmillenon/RIOT,ThanhVic/RIOT,gebart/RIOT,basilfx/RIOT,latsku/RIOT,Osblouf/RIOT,mfrey/RIOT,ks156/RIOT,Yonezawa-T2/RIOT,binarylemon/RIOT,gbarnett/RIOT,stevenj/RIOT,patkan/RIOT,jhollister/RIOT,yogo1212/RIOT,arvindpdmn/RIOT,ntrtrung/RIOT,immesys/RiSyn,chris-wood/RIOT,dailab/RIOT,asanka-code/RIOT,sumanpanchal/RIOT,EmuxEvans/RIOT,avmelnikoff/RIOT,ant9000/RIOT,Hyungsin/RIOT-OS,beurdouche/RIOT,neumodisch/RIOT,kushalsingh007/RIOT,d00616/RIOT,koenning/RIOT,foss-for-synopsys-dwc-arc-processors/RIOT,herrfz/RIOT-old,abp719/RIOT,automote/RIOT,herrfz/RIOT,RIOT-OS/RIOT,lazytech-org/RIOT,sumanpanchal/RIOT,MonsterCode8000/RIOT,gbarnett/RIOT,ntrtrung/RIOT,thomaseichinger/RIOT,Darredevil/RIOT,Josar/RIOT,FrancescoErmini/RIOT,jasonatran/RIOT,Hyungsin/RIOT-OS,alex1818/RIOT,miri64/RIOT,brettswann/RIOT,kYc0o/RIOT,kb2ma/RIOT,kbumsik/RIOT,bartfaizoltan/RIOT,Yonezawa-T2/RIOT,mziegert/RIOT,brettswann/RIOT,BytesGalore/PetersRIOT,syin2/RIOT,beurdouche/RIOT,bartfaizoltan/RIOT,rfswarm/RIOT