无法连接到特定的网络接口

Question

我已阅读文档'inet','gen_tcp'，但无法理解错误在哪里。

connect_option（）= {IP，INET：socket_address（）}

socket_address（）= IP-地址（）

IP-地址（）= ip4_address（）| ip6_address（）

ip6_address（）= {0..65535， 0..65535， 0..65535， 0..65535， 0..65535， 0..65535， 0 ..65535， 0..65535}

所以它必须是{IP，{0..65535， 0..65535， 0..65535， 0..65535， 0..65535 ， 0..65535, 0..65535, 0..65535}}

([email protected])8> Ip = {65152,0,0,0,51840,11332,54567,49336}. 
{65152,0,0,0,51840,11332,54567,49336} 
([email protected])9> gen_tcp:connect({127,0,0,1}, 6653, [binary, {packet, raw}, {active, false}, {ip, Ip}]). 
{error,eafnosupport} 
([email protected])10> gen_tcp:connect({0,0,0,0,0,0,0,1}, 6653, [binary, {packet, raw}, {active, false}, {ip, Ip}]). 
** exception exit: badarg 
    in function gen_tcp:connect/4 (gen_tcp.erl, line 148). 

inet:getifaddrs(). 
{ok,[{"lo", 
     [{flags,[up,loopback,running]}, 
     {hwaddr,[0,0,0,0,0,0]}, 
     {addr,{127,0,0,1}}, 
     {netmask,{255,0,0,0}}, 
     {addr,{0,0,0,0,0,0,0,1}}, 
     {netmask,{65535,65535,65535,65535,65535,65535,65535, 
       65535}}]}, 
    {"eth0", 
     [{flags,[up,broadcast,running,multicast]}, 
     {hwaddr,[82,84,0,229,5,188]}, 
     {addr,{172,17,0,218}}, 
     {netmask,{255,255,255,128}}, 
     {broadaddr,{172,17,0,255}}, 
     {addr,{65152,0,0,0,20564,255,65253,1468}}, 
     {netmask,{65535,65535,65535,65535,0,0,0,0}}]}, 
    {"eth1", 
     [{flags,[up,broadcast,running,multicast]}, 
     {hwaddr,[82,84,0,229,5,189]}, 
     {addr,{65152,0,0,0,51840,11332,54567,49336}}, 
     {netmask,{65535,65535,65535,65535,0,0,0,0}}]}]} 

或

([email protected])9> Op. 
[binary, 
{packet,raw}, 
{active,false}, 
{reuseaddr,true}, 
{ip,{65152,0,0,0,51840,11332,54567,49336}}] 
([email protected])10> gen_tcp:listen(6653, Op). 

{错误，EINVAL}

Answer 1

如果再次检查gen_tcp文档，你会看到，使用IPv6地址的工作时，你需要添加套接字选项INET6，你在代码上缺少的是

试试这个代码，它应该工作：

Op = [binary, {packet,line}, {active,false}, {reuseaddr,true}, inet6, {ip, {0,0,0,0,0,0,0,1}}]. 
gen_tcp:listen(8000, Op).