请问关于IPV6下的PPP连接

发布于 2021-12-27 15:09:14 浏览：942 订阅该版

3 个回答

郑建兴 2022-01-04

这家伙很懒，什么也没写！

aozima 2021-12-27

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

郑建兴 2021-12-27

这家伙很懒，什么也没写！

aozima 2021-12-27

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

郑建兴 2021-12-27

这家伙很懒，什么也没写！

aozima 2021-12-27

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

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追加回复

xiangxistu 2021-12-28

这家伙很懒，什么也没写！

郑建兴 2021-12-28

这家伙很懒，什么也没写！

@xiangxistu 谢谢回复，
麻烦确认个问题，这个模组是不是支持IPV6的
![image.png](https://oss-club.rt-thread.org/uploads/20211228/1a8169539cd569894564d434bf11d179.png)

3、不能上网指的是PPP拨号执行完成，应用程序执行连接远程IPV6 TCP服务器不能成功（服务器验证过是可以用的）
连接的代码：
```c
int sock;
struct sockaddr_in6 server_addr6;
struct hostent *host;
const char *url = "240e:980:9900::e1d:f8a9";
int port = 11860;
/* 创建一个socket，类型是SOCKET_STREAM，TCP类型 */
if ((sock = socket(PF_INET6, SOCK_STREAM, 0)) == -1)
{
	/* 创建socket失败 */
	log_i("Socket error\n");
	break;
}
			
/* 初始化预连接的服务端地址 */
memset(&server_addr6, 0, sizeof(server_addr6));
server_addr6.sin6_family = AF_INET6;
server_addr6.sin6_port = htons(port);
/* 将字符串转换为IPv6地址 */
if(inet_pton(AF_INET6, url, &server_addr6.sin6_addr.s6_addr) != 1)
{
	log_i("inet_pton() error\n");
	return ;
}		
/* 连接到服务端 */
if(connect(sock, (struct sockaddr *)&server_addr6, sizeof(server_addr6)) < 0)
{
	/* 连接失败 */
	log_i("Connect fail!\n");
	closesocket(sock);
	break;
}
else
{
	/* 连接成功 */
	log_i("Connect successful\n");
	break;
}
```

4、看LWIP的日志有个地方很疑惑，在IPCP阶段的时候，
IPV4下lwip的ppp端IP地址请求是0.0.0.0给模组端，但模组端NAK并发了一个IP不是0.0.0.0的地址给lwip的ppp端，之后lwip的ppp端采用这个地址并在此请求，所以IPV4下的IP地址是模组端分配过来的；
IPV6下却是反过来的，模组端发送都是0的地址给LWIP的PPP端，让LWIP的PPP端给它分配，就这点感到很疑惑，具体的日志如下，麻烦懂的帮忙解答下
IPV4下IPCP的日志，部分截图如下，后面还有IPV6的日志麻烦耐心看下
![image.png](https://oss-club.rt-thread.org/uploads/20211228/d3f97ffb0a2d9b568a89e8bc0aa39fcd.png)
```
> (lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)PAP authentication succeeded

(lwIP/2.1.2/lwip/src/netif/ppp/ppp.c:new_phase)ppp phase changed[0]: phase=9

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]

(src/uart_thread_entry.c:ppp_output_cb)TX:
(src/uart_thread_entry.c:log_content)7E FF 03 80 21 01 01 00 1C 02 06 00 2D 0F 01 03 |~...!.......-...

(src/uart_thread_entry.c:log_content)06 00 00 00 00 81 06 00 00 00 00 83 06 00 00 00 |................

(src/uart_thread_entry.c:log_content)00 55 15 7E                                     |.U.~

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_write)pppos_write[0]: len=32

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)sent [IPV6CP ConfReq id=0x1 <addr fe80::2851:5098:a450:df15>]

(src/uart_thread_entry.c:ppp_output_cb)TX:
(src/uart_thread_entry.c:log_content)FF 03 80 57 01 01 00 0E 01 0A 28 51 50 98 A4 50 |...W......(QP..P

(src/uart_thread_entry.c:log_content)DF 15 F2 CF 7E                                  |....~

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_write)pppos_write[0]: len=18

[18:02:41.021]收←◆(src/uart_thread_entry.c:ppp_recv_processdata)RX:
(src/uart_thread_entry.c:log_content)7E 80 21 01 00 00 04 67 C3 7E                   |~.!....g.~

(src/uart_thread_entry.c:ppp_recv_processdata)RX:
(src/uart_thread_entry.c:log_content)7E 80 21 04 01 00 0A 02 06 00 2D 0F 01 F8 30 7E |~.!.......-...0~

(lwIP/2.1.2/lwip/src/api/tcpip.c:tcpip_thread_handle_msg)tcpip_thread: PACKET 2000a50c

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_input)pppos_input[0]: got 10 bytes

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)rcvd [IPCP ConfReq id=0x0]

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)sent [IPCP ConfNak id=0x0 <addr 0.0.0.0>]

(src/uart_thread_entry.c:ppp_output_cb)TX:
(src/uart_thread_entry.c:log_content)7E FF 03 80 21 03 00 00 0A 03 06 00 00 00 00 A0 |~...!...........

(src/uart_thread_entry.c:log_content)3D 7E                                           |=~

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_write)pppos_write[0]: len=14

(lwIP/2.1.2/lwip/src/api/tcpip.c:tcpip_thread_handle_msg)tcpip_thread: PACKET 2000a4fc

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_input)pppos_input[0]: got 16 bytes

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)rcvd [IPCP ConfRej id=0x1 <compress VJ 0f 01>]

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)sent [IPCP ConfReq id=0x2 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]

(src/uart_thread_entry.c:ppp_output_cb)TX:
(src/uart_thread_entry.c:log_content)FF 03 80 21 01 02 00 16 03 06 00 00 00 00 81 06 |...!............

(src/uart_thread_entry.c:log_content)00 00 00 00 83 06 00 00 00 00 DA 82 7E          |............~

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_write)pppos_write[0]: len=26

(src/uart_thread_entry.c:ppp_recv_processdata)RX:
(src/uart_thread_entry.c:log_content)7E 80 21 01 01 00 04 BB 99 7E                   |~.!......~

(src/uart_thread_entry.c:ppp_recv_processdata)RX:
(src/uart_thread_entry.c:log_content)7E 80 21 03 02 00 16 03 06 0A 4C 21 6A 81 06 D3 |~.!.......L!j...

(src/uart_thread_entry.c:log_content)8F 93 78 83 06 70 05 E6 36 AC 9D 7E             |..x..p..6..~

(lwIP/2.1.2/lwip/src/api/tcpip.c:tcpip_thread_handle_msg)tcpip_thread: PACKET 2000a4fc

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_input)pppos_input[0]: got 10 bytes

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)rcvd [IPCP ConfReq id=0x1]

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)sent [IPCP ConfAck id=0x1]

(src/uart_thread_entry.c:ppp_output_cb)TX:
(src/uart_thread_entry.c:log_content)FF 03 80 21 02 01 00 04 CD 92 7E                |...!......~

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_write)pppos_write[0]: len=8

(lwIP/2.1.2/lwip/src/api/tcpip.c:tcpip_thread_handle_msg)tcpip_thread: PACKET 2000a50c

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_input)pppos_input[0]: got 28 bytes

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)rcvd [IPCP ConfNak id=0x2 <addr 10.76.33.106> <ms-dns1 211.143.147.120> <ms-dns2 112.5.230.54>]

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)sent [IPCP ConfReq id=0x3 <addr 10.76.33.106> <ms-dns1 211.143.147.120> <ms-dns2 112.5.230.54>]

(src/uart_thread_entry.c:ppp_output_cb)TX:
(src/uart_thread_entry.c:log_content)FF 03 80 21 01 03 00 16 03 06 0A 4C 21 6A 81 06 |...!.......L!j..

(src/uart_thread_entry.c:log_content)D3 8F 93 78 83 06 70 05 E6 36 0B 60 7E          |...x..p..6.`~

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_write)pppos_write[0]: len=26

(src/uart_thread_entry.c:ppp_recv_processdata)RX:
(src/uart_thread_entry.c:log_content)7E 80 21 02 03 00 16 03 06 0A 4C 21 6A 81 06 D3 |~.!.......L!j...

(src/uart_thread_entry.c:log_content)8F 93 78 83 06 70 05 E6 36 9D 03 7E             |..x..p..6..~

(lwIP/2.1.2/lwip/src/api/tcpip.c:tcpip_thread_handle_msg)tcpip_thread: PACKET 2000a50c

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_input)pppos_input[0]: got 28 bytes

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)rcvd [IPCP ConfAck id=0x3 <addr 10.76.33.106> <ms-dns1 211.143.147.120> <ms-dns2 112.5.230.54>]

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)Could not determine remote IP address: defaulting to 10.64.64.64

(lwIP/2.1.2/lwip/src/netif/ppp/ppp.c:sifvjcomp)sifvjcomp[0]: VJ compress enable=0 slot=0 max slot=0

(lwIP/2.1.2/lwip/src/netif/ppp/ppp.c:sifup)sifup[0]: err_code=0

(src/uart_thread_entry.c:ppp_link_status_cb)ppp_link_status_cb: PPPERR_NONE

(src/uart_thread_entry.c:ppp_link_status_cb)   our_ip4addr = 10.76.33.106

(src/uart_thread_entry.c:ppp_link_status_cb)   his_ipaddr  = 10.64.64.64

(src/uart_thread_entry.c:ppp_link_status_cb)   netmask     = 255.255.255.255

(src/uart_thread_entry.c:ppp_link_status_cb)   our_ip6addr = ::

(src/uart_thread_entry.c:ppp_link_status_cb)   dns1        = 211.143.147.120

(src/uart_thread_entry.c:ppp_link_status_cb)   dns2        = 112.5.230.54

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)local  IP address 10.76.33.106

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)remote IP address 10.64.64.64

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)primary   DNS address 211.143.147.120

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)secondary DNS address 112.5.230.54

(lwIP/2.1.2/lwip/src/netif/ppp/ppp.c:new_phase)ppp phase changed[0]: phase=10

IPV6下IPCP的日志，部分截图如下
![image.png](https://oss-club.rt-thread.org/uploads/20211228/9d7a4ef1ef2c9db743c1c7d5518f5b6e.png)

> (lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)PAP authentication succeeded

(lwIP/2.1.2/lwip/src/netif/ppp/ppp.c:new_phase)ppp phase changed[0]: phase=9

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)sent [IPCP ConfReq id=0x1 <compress VJ 0f 01> <addr 0.0.0.0>]

(src/uart_thread_entry.c:ppp_output_cb)TX:
(src/uart_thread_entry.c:log_content)7E FF 03 80 21 01 01 00 10 02 06 00 2D 0F 01 03 |~...!.......-...

(src/uart_thread_entry.c:log_content)06 00 00 00 00 2D 99 7E                         |.....-.~

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_write)pppos_write[0]: len=20

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)sent [IPV6CP ConfReq id=0x1 <addr fe80::3941:9f56:49ba:a47e>]

(src/uart_thread_entry.c:ppp_output_cb)TX:
(src/uart_thread_entry.c:log_content)FF 03 80 57 01 01 00 0E 01 0A 39 41 9F 56 49 BA |...W......9A.VI.

(src/uart_thread_entry.c:log_content)A4 7D 5E AE 3C 7E                               |.}^.<~

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_write)pppos_write[0]: len=18

[18:16:40.941]收←◆(src/uart_thread_entry.c:ppp_recv_processdata)RX:
(src/uart_thread_entry.c:log_content)7E 80 57 01 00 00 0E 01 0A 00 00 00 00 00 00 00 |~.W.............

(src/uart_thread_entry.c:log_content)00 0D BD 7E                                     |...~

(src/uart_thread_entry.c:ppp_recv_processdata)RX:
(src/uart_thread_entry.c:log_content)7E 80 57 02 01 00 0E 01 0A 39 41 9F 56 49 BA A4 |~.W......9A.VI..

(src/uart_thread_entry.c:log_content)7D 5E 2D 52 7E                                  |}^-R~

(lwIP/2.1.2/lwip/src/api/tcpip.c:tcpip_thread_handle_msg)tcpip_thread: PACKET 2000a3c4

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_input)pppos_input[0]: got 20 bytes

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)rcvd [IPV6CP ConfReq id=0x0 <addr fe80::0000:0000:0000:0000>]

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)sent [IPV6CP ConfNak id=0x0 <addr fe80::c9b2:2ac1:07ca:745e>]

(src/uart_thread_entry.c:ppp_output_cb)TX:
(src/uart_thread_entry.c:log_content)7E FF 03 80 57 03 00 00 0E 01 0A C9 B2 2A C1 07 |~...W........*..

(src/uart_thread_entry.c:log_content)CA 74 5E 5B 26 7E                               |.t^[&~

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_write)pppos_write[0]: len=18

(lwIP/2.1.2/lwip/src/api/tcpip.c:tcpip_thread_handle_msg)tcpip_thread: PACKET 2000a3b4

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_input)pppos_input[0]: got 21 bytes

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)rcvd [IPV6CP ConfAck id=0x1 <addr fe80::3941:9f56:49ba:a47e>]

(src/uart_thread_entry.c:ppp_recv_processdata)RX:
(src/uart_thread_entry.c:log_content)7E 80 57 01 01 00 0E 01 0A C9 B2 2A C1 07 CA 74 |~.W........*...t

(src/uart_thread_entry.c:log_content)5E 9F 33 7E                                     |^.3~

(lwIP/2.1.2/lwip/src/api/tcpip.c:tcpip_thread_handle_msg)tcpip_thread: PACKET 2000a3b4

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_input)pppos_input[0]: got 20 bytes

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)rcvd [IPV6CP ConfReq id=0x1 <addr fe80::c9b2:2ac1:07ca:745e>]

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)sent [IPV6CP ConfAck id=0x1 <addr fe80::c9b2:2ac1:07ca:745e>]

(src/uart_thread_entry.c:ppp_output_cb)TX:
(src/uart_thread_entry.c:log_content)7E FF 03 80 57 02 01 00 0E 01 0A C9 B2 2A C1 07 |~...W........*..

(src/uart_thread_entry.c:log_content)CA 74 5E 1C 5D 7E                               |.t^.]~

(lwIP/2.1.2/lwip/src/netif/ppp/pppos.c:pppos_write)pppos_write[0]: len=18

(lwIP/2.1.2/lwip/src/netif/ppp/ppp.c:sif6up)sif6up[0]: err_code=0

(src/uart_thread_entry.c:ppp_link_status_cb)ppp_link_status_cb: PPPERR_NONE

(src/uart_thread_entry.c:ppp_link_status_cb)   our_ip4addr = 0.0.0.0

(src/uart_thread_entry.c:ppp_link_status_cb)   his_ipaddr  = 0.0.0.0

(src/uart_thread_entry.c:ppp_link_status_cb)   netmask     = 255.255.255.255

(src/uart_thread_entry.c:ppp_link_status_cb)   our_ip6addr = FE80::3941:9F56:49BA:A47E

(src/uart_thread_entry.c:ppp_link_status_cb)   dns1        = 0.0.0.0

(src/uart_thread_entry.c:ppp_link_status_cb)   dns2        = 0.0.0.0

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)local  LL address fe80::3941:9f56:49ba:a47e

(lwIP/2.1.2/lwip/src/netif/ppp/utils.c:ppp_log_write)remote LL address fe80::c9b2:2ac1:07ca:745e

(lwIP/2.1.2/lwip/src/netif/ppp/ppp.c:new_phase)ppp phase changed[0]: phase=10

(lwIP/2.1.2/lwip/src/api/sockets.c:lwip_socket)lwip_socket(UNKNOWN, SOCK_STREAM, 0) = 
(lwIP/2.1.2/lwip/src/api/sockets.c:lwip_socket)0

(lwIP/2.1.2/lwip/src/api/sockets.c:lwip_connect)lwip_connect(0, addr=
(lwIP/2.1.2/lwip/src/api/sockets.c:lwip_connect)240e:980:9900:0:0:0:e1d:f8a9
(lwIP/2.1.2/lwip/src/api/sockets.c:lwip_connect) port=11860)

(lwIP/2.1.2/lwip/src/core/tcp.c:tcp_connect)tcp_connect to port 11860
```