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net: dhcp6: Add DHCPv6 (DHCP for IPv6)

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Adds DHCPv6 protocol to u-boot.

Allows for address assignement with DHCPv6 4-message exchange
(SOLICIT->ADVERTISE->REQUEST->REPLY).  Includes DHCPv6 options
required by RFC 8415.  Also adds DHCPv6 options required
for PXE boot.

Possible enhancements:
- Duplicate address detection on DHCPv6 assigned address
- IPv6 address assignement through SLAAC
- Sending/parsing other DHCPv6 options (NTP, DNS, etc...)

Signed-off-by: Sean Edmond <seanedmond@microsoft.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
This commit is contained in:
Sean Edmond 2023-04-11 10:48:46 -07:00 • committed by Tom Rini
parent 0b99afec9c
commit a0245818f7
5 changed files with 989 additions and 4 deletions
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6
include/net.h
View file

@ -484,6 +484,8 @@ extern char net_hostname[32]; /* Our hostname */
#ifdef CONFIG_NET
extern char net_root_path[CONFIG_BOOTP_MAX_ROOT_PATH_LEN]; /* Our root path */
#endif
/* Indicates whether the pxe path prefix / config file was specified in dhcp option */
extern char *pxelinux_configfile;
/** END OF BOOTP EXTENTIONS **/
extern u8 net_ethaddr[ARP_HLEN]; /* Our ethernet address */
extern u8 net_server_ethaddr[ARP_HLEN]; /* Boot server enet address */
@ -504,8 +506,8 @@ extern ushort net_native_vlan; /* Our Native VLAN */
extern int net_restart_wrap; /* Tried all network devices */
enum proto_t {
BOOTP, RARP, ARP, TFTPGET, DHCP, PING, PING6, DNS, NFS, CDP, NETCONS,
SNTP, TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT, WOL, UDP, NCSI, WGET
BOOTP, RARP, ARP, TFTPGET, DHCP, DHCP6, PING, PING6, DNS, NFS, CDP,
NETCONS, SNTP, TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT, WOL, UDP, NCSI, WGET
};
extern char net_boot_file_name[1024];/* Boot File name */