net: dhcp6: pxe: Add DHCP/PXE commands for IPv6
Adds commands to support DHCP and PXE with IPv6.
New configs added:
- CMD_DHCP6
- DHCP6_PXE_CLIENTARCH
- DHCP6_PXE_DHCP_OPTION
- DHCP6_ENTERPRISE_ID
New commands added (when IPv6 is enabled):
- dhcp6
- pxe get -ipv6
- pxe boot -ipv6
Signed-off-by: Sean Edmond <seanedmond@microsoft.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
diff --git a/cmd/pxe.c b/cmd/pxe.c
index db8e469..6771425 100644
--- a/cmd/pxe.c
+++ b/cmd/pxe.c
@@ -8,6 +8,8 @@
#include <command.h>
#include <fs.h>
#include <net.h>
+#include <net6.h>
+#include <malloc.h>
#include "pxe_utils.h"
@@ -29,12 +31,20 @@
{
char *tftp_argv[] = {"tftp", NULL, NULL, NULL};
int ret;
+ int num_args;
tftp_argv[1] = file_addr;
tftp_argv[2] = (void *)file_path;
+ if (ctx->use_ipv6) {
+ tftp_argv[3] = USE_IP6_CMD_PARAM;
+ num_args = 4;
+ } else {
+ num_args = 3;
+ }
- if (do_tftpb(ctx->cmdtp, 0, 3, tftp_argv))
+ if (do_tftpb(ctx->cmdtp, 0, num_args, tftp_argv))
return -ENOENT;
+
ret = pxe_get_file_size(sizep);
if (ret)
return log_msg_ret("tftp", ret);
@@ -44,6 +54,22 @@
}
/*
+ * Looks for a pxe file with specified config file name,
+ * which is received from DHCPv4 option 209 or
+ * DHCPv6 option 60.
+ *
+ * Returns 1 on success or < 0 on error.
+ */
+static int pxe_dhcp_option_path(struct pxe_context *ctx, unsigned long pxefile_addr_r)
+{
+ int ret = get_pxe_file(ctx, pxelinux_configfile, pxefile_addr_r);
+
+ free(pxelinux_configfile);
+
+ return ret;
+}
+
+/*
* Looks for a pxe file with a name based on the pxeuuid environment variable.
*
* Returns 1 on success or < 0 on error.
@@ -105,15 +131,24 @@
return -ENOENT;
}
-int pxe_get(ulong pxefile_addr_r, char **bootdirp, ulong *sizep)
+int pxe_get(ulong pxefile_addr_r, char **bootdirp, ulong *sizep, bool use_ipv6)
{
struct cmd_tbl cmdtp[] = {}; /* dummy */
struct pxe_context ctx;
int i;
if (pxe_setup_ctx(&ctx, cmdtp, do_get_tftp, NULL, false,
- env_get("bootfile")))
+ env_get("bootfile"), use_ipv6))
return -ENOMEM;
+
+ if (IS_ENABLED(CONFIG_DHCP6_PXE_DHCP_OPTION) &&
+ pxelinux_configfile && use_ipv6) {
+ if (pxe_dhcp_option_path(&ctx, pxefile_addr_r) > 0)
+ goto done;
+
+ goto error_exit;
+ }
+
/*
* Keep trying paths until we successfully get a file we're looking
* for.
@@ -131,6 +166,7 @@
i++;
}
+error_exit:
pxe_destroy_ctx(&ctx);
return -ENOENT;
@@ -169,9 +205,18 @@
char *fname;
ulong size;
int ret;
+ bool use_ipv6 = false;
- if (argc != 1)
- return CMD_RET_USAGE;
+ if (IS_ENABLED(CONFIG_IPV6)) {
+ if (!strcmp(argv[argc - 1], USE_IP6_CMD_PARAM))
+ use_ipv6 = true;
+
+ if (!(argc == 1 || (argc == 2 && use_ipv6)))
+ return CMD_RET_USAGE;
+ } else {
+ if (argc != 1)
+ return CMD_RET_USAGE;
+ }
pxefile_addr_str = from_env("pxefile_addr_r");
@@ -183,7 +228,7 @@
if (ret < 0)
return 1;
- ret = pxe_get(pxefile_addr_r, &fname, &size);
+ ret = pxe_get(pxefile_addr_r, &fname, &size, use_ipv6);
switch (ret) {
case 0:
printf("Config file '%s' found\n", fname);
@@ -211,13 +256,19 @@
char *pxefile_addr_str;
struct pxe_context ctx;
int ret;
+ bool use_ipv6 = false;
+
+ if (IS_ENABLED(CONFIG_IPV6)) {
+ if (!strcmp(argv[argc - 1], USE_IP6_CMD_PARAM))
+ use_ipv6 = true;
+ }
- if (argc == 1) {
+ if (argc == 1 || (argc == 2 && use_ipv6)) {
pxefile_addr_str = from_env("pxefile_addr_r");
if (!pxefile_addr_str)
return 1;
- } else if (argc == 2) {
+ } else if (argc == 2 || (argc == 3 && use_ipv6)) {
pxefile_addr_str = argv[1];
} else {
return CMD_RET_USAGE;
@@ -229,7 +280,7 @@
}
if (pxe_setup_ctx(&ctx, cmdtp, do_get_tftp, NULL, false,
- env_get("bootfile"))) {
+ env_get("bootfile"), use_ipv6)) {
printf("Out of memory\n");
return CMD_RET_FAILURE;
}
@@ -244,8 +295,8 @@
}
static struct cmd_tbl cmd_pxe_sub[] = {
- U_BOOT_CMD_MKENT(get, 1, 1, do_pxe_get, "", ""),
- U_BOOT_CMD_MKENT(boot, 2, 1, do_pxe_boot, "", "")
+ U_BOOT_CMD_MKENT(get, 2, 1, do_pxe_get, "", ""),
+ U_BOOT_CMD_MKENT(boot, 3, 1, do_pxe_boot, "", "")
};
static void __maybe_unused pxe_reloc(void)
@@ -281,9 +332,11 @@
return CMD_RET_USAGE;
}
-U_BOOT_CMD(pxe, 3, 1, do_pxe,
- "commands to get and boot from pxe files",
- "get - try to retrieve a pxe file using tftp\n"
- "pxe boot [pxefile_addr_r] - boot from the pxe file at pxefile_addr_r\n"
+U_BOOT_CMD(pxe, 4, 1, do_pxe,
+ "commands to get and boot from pxe files\n"
+ "To use IPv6 add -ipv6 parameter",
+ "get [" USE_IP6_CMD_PARAM "] - try to retrieve a pxe file using tftp\n"
+ "pxe boot [pxefile_addr_r] [-ipv6] - boot from the pxe file at pxefile_addr_r\n"
);
-#endif
+
+#endif /* CONFIG_CMD_NET */