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pxe: support pxe clients with custom vendor-class

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From 606d638918edb0e0ec07fe27eb68d06fb5ebd981 Mon Sep 17 00:00:00 2001
From: Miao Wang <shankerwangmiao@gmail.com>
Date: Fri, 4 Dec 2020 09:59:37 +0800
Subject: [PATCH v2] pxe: support pxe clients with custom vendor-class

According to UEFI[1] and PXE[2] specs, PXE clients are required to have
`PXEClient` identfier in the vendor-class field of DHCP requests, and
PXE servers should also include that identifier in their responses.
However, the firmware of servers from a few vendors[3] are customized to
include a different identifier. This patch adds an option named
`dhcp-pxe-vendor` to provide a list of such identifiers. The identifier
used in responses sent from dnsmasq is identical to that in the coresponding
request.

[1]: https://uefi.org/sites/default/files/resources/UEFI%20Spec%202.8B%20May%202020.pdf
[2]: http://www.pix.net/software/pxeboot/archive/pxespec.pdf
[3]: For instance, TaiShan servers from Huawei, which are Arm64-based,
       send `HW-Client` in PXE requests up to now.

Signed-off-by: Miao Wang <shankerwangmiao@gmail.com>
This commit is contained in:
Wang Shanker
2020-12-04 10:17:35 +08:00
committed by Simon Kelley
parent f60fea1fb0
commit 4ded96209e
4 changed files with 121 additions and 28 deletions
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9
src/dnsmasq.h
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@@ -829,6 +829,7 @@ struct dhcp_opt {
#define DHOPT_RFC3925 2048
#define DHOPT_TAGOK 4096
#define DHOPT_ADDR6 8192
#define DHOPT_VENDOR_PXE 16384
struct dhcp_boot {
char *file, *sname, *tftp_sname;
@@ -852,6 +853,8 @@ struct pxe_service {
struct pxe_service *next;
};
#define DHCP_PXE_DEF_VENDOR "PXEClient"
#define MATCH_VENDOR 1
#define MATCH_USER 2
#define MATCH_CIRCUIT 3
@@ -867,6 +870,11 @@ struct dhcp_vendor {
struct dhcp_vendor *next;
};
struct dhcp_pxe_vendor {
char *data;
struct dhcp_pxe_vendor *next;
};
struct dhcp_mac {
unsigned int mask;
int hwaddr_len, hwaddr_type;
@@ -1040,6 +1048,7 @@ extern struct daemon {
struct dhcp_config *dhcp_conf;
struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6;
struct dhcp_match_name *dhcp_name_match;
struct dhcp_pxe_vendor *dhcp_pxe_vendors;
struct dhcp_vendor *dhcp_vendors;
struct dhcp_mac *dhcp_macs;
struct dhcp_boot *boot_config;