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Re: [lwip-users] netif setup for IPv6 traffic (static /128 address assig

From: address@hidden
Subject: Re: [lwip-users] netif setup for IPv6 traffic (static /128 address assignment)
Date: Wed, 25 Jul 2018 15:46:02 +0200
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1

On 25.07.2018 08:01, josephjah wrote:
Hello, I'm trying to assign a static /128 address to a netif but I think I'm
doing something wrong. I'm using 2.0.3 (also tested latest mater). I can see
packets are being correctly received but when ethip6_output() is called it
can't seem to find the proper interface to send out on. I've stepped through
the code for a bit and it seems like it can't get what it needs from the ND6
module, almost as if there are no destination cache/hints. Does my
initialization code look sane? Do I need to set additional flags or enable a
module of some sort? Thanks in advance guys.

// For instance, I want to assign: fde4:da74:55b2:b9ee:6a99:930f:26b9:2df0

static ip6_addr_t ipaddr;
memcpy(&(ipaddr.addr), ip.rawIpData(), sizeof(ipaddr.addr));
lwipdev->mtu = MY_MTU;
lwipdev->name[0] = 'l';
lwipdev->name[1] = '0'+lwipInterfacesCount;
lwipdev->hwaddr_len = 6;
lwipdev->linkoutput = lwip_eth_tx;
lwipdev->ip6_autoconfig_enabled = 1;
mac.copyTo(lwipdev->hwaddr, lwipdev->hwaddr_len);
netif_add(lwipdev, NULL, NULL, NULL, NULL, tapif_init, ethernet_input);
lwipdev->state = this;
netif_create_ip6_linklocal_address(lwipdev, 1);
s8_t idx = 1;
netif_add_ip6_address(lwipdev, &ipaddr, &idx);
netif_ip6_addr_set_state(lwipdev, 1, IP6_ADDR_TENTATIVE);
lwipdev->output_ip6 = ethip6_output;

This code is totally not standard. You're mixing up responsibilities. However, I don't have an example of what you're trying to do right now. Does 'netif_ip6_addr_set()' not do what you want?


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