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net: ppp: dialup enablers

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Introducing PPP dialup features to enable e.g. usage of nrf9160
based board as a dialup modem for transferring ip data over PPP
 (e.g. windows dial up), i.e. usage of Zephyr PPP as a server for
 providing MTU/MRU, IP address and DNS addresses for a PC:
- PPP LCP MRU option (configurable)
- PPP server: IPCP ip and dns address peer options to enable
providing IP and DNS addresses for PPP peer.

Signed-off-by: Jani Hirsimäki <jani.hirsimaki@nordicsemi.no>
This commit is contained in:
Jani Hirsimäki 2021-03-25 14:00:28 +02:00 • committed by Jukka Rissanen
commit 5d76e8aca8
6 changed files with 231 additions and 2 deletions
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6
drivers/net/Kconfig
View file

@ -23,6 +23,12 @@ config NET_PPP_DRV_NAME
help
This option sets the driver name
config NET_PPP_MTU_MRU
int "PPP MTU and MRU"
default 1500
help
This options sets MTU and MRU for PPP link.
config NET_PPP_UART_BUF_LEN
int "Buffer length when reading from UART"
default 8

14
drivers/net/ppp.c
View file

@ -576,6 +576,20 @@ static int ppp_send(const struct device *dev, struct net_pkt *pkt)
protocol = htons(PPP_IP);
} else if (net_pkt_family(pkt) == AF_INET6) {
protocol = htons(PPP_IPV6);
} else if (IS_ENABLED(CONFIG_NET_SOCKETS_PACKET) &&
net_pkt_family(pkt) == AF_PACKET) {
char type = (NET_IPV6_HDR(pkt)->vtc & 0xf0);
switch (type) {
case 0x60:
protocol = htons(PPP_IPV6);
break;
case 0x40:
protocol = htons(PPP_IP);
break;
default:
return -EPROTONOSUPPORT;
}
} else {
return -EPROTONOSUPPORT;
}