jeffsf:

Archer C7, "stock" 17.01.4
Packages installed include

• kmod-gre
• gre
• ip-full

Able to manually create and use a gretap interface using ''ip'' from the command line

UCI configuration fails on
config interface 'gt_1'
option proto 'gretap'
option ipaddr '10.11.12.2'
option peeraddr '10.11.12.3'
option force_link '1'


with log entries of

daemon.notice netifd: gt_1 (25772): ./gre.sh: eval: line 1: resolveip: not found


This unit does not have a name server running on it, nor will it have access to one until the network is up.

''/lib/netifd/proto/gre.sh'' contains:
gre_setup() {
local cfg="$1"
local mode="$2"
local remoteip

    local ipaddr peeraddr
    json_get_vars df ipaddr peeraddr tunlink

    [ -z "$peeraddr" ] && {
            proto_notify_error "$cfg" "MISSING_PEER_ADDRESS"
            proto_block_restart "$cfg"
            exit
    }

    remoteip=$(resolveip -t 10 -4 "$peeraddr")

No dependency is on resolveip is given
# opkg info gre
Package: gre
Version: 1-7
Depends: libc
Status: install user installed
Architecture: mips_24kc
Installed-Time: 1519797112


Manually installing ''resolveip'' allows UCI configuration to complete.

Suggest either or both an explicit dependency on ''resolveip'' and "short-circuiting" the call if a string-literal IP address is supplied.