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-rw-r--r--package/busybox/patches/244-udhcpc_add_6rd_option.patch131
1 files changed, 131 insertions, 0 deletions
diff --git a/package/busybox/patches/244-udhcpc_add_6rd_option.patch b/package/busybox/patches/244-udhcpc_add_6rd_option.patch
new file mode 100644
index 0000000000..25c5ebf6fe
--- /dev/null
+++ b/package/busybox/patches/244-udhcpc_add_6rd_option.patch
@@ -0,0 +1,131 @@
+--- a/networking/udhcp/common.c
++++ b/networking/udhcp/common.c
+@@ -54,6 +54,7 @@ const struct dhcp_optflag dhcp_optflags[
+ { OPTION_SIP_SERVERS , 0x78 }, /* DHCP_SIP_SERVERS */
+ #endif
+ { OPTION_STATIC_ROUTES , 0x79 }, /* DHCP_STATIC_ROUTES */
++ { OPTION_6RD , 0xd4 }, /* DHCP_6RD */
+ { OPTION_STRING , 0xfc }, /* DHCP_WPAD */
+
+ /* Options below have no match in dhcp_option_strings[],
+@@ -114,6 +115,7 @@ const char dhcp_option_strings[] ALIGN1
+ // doesn't work in udhcpd.conf since OPTION_STATIC_ROUTES
+ // is not handled yet by "string->option" conversion code:
+ "staticroutes" "\0"/* DHCP_STATIC_ROUTES */
++ "ip6rd" "\0" /* DHCP_6RD */
+ "wpad" "\0" /* DHCP_WPAD */
+ ;
+
+@@ -141,6 +143,7 @@ const uint8_t dhcp_option_lengths[] ALIG
+ [OPTION_S32] = 4,
+ /* Just like OPTION_STRING, we use minimum length here */
+ [OPTION_STATIC_ROUTES] = 5,
++ [OPTION_6RD] = 22,
+ };
+
+
+--- a/networking/udhcp/dhcpc.c
++++ b/networking/udhcp/dhcpc.c
+@@ -45,6 +45,7 @@ static const uint8_t len_of_option_as_st
+ [OPTION_IP ] = sizeof("255.255.255.255 "),
+ [OPTION_IP_PAIR ] = sizeof("255.255.255.255 ") * 2,
+ [OPTION_STATIC_ROUTES ] = sizeof("255.255.255.255/32 255.255.255.255 "),
++ [OPTION_6RD ] = sizeof("32 128 FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF:FFFF 255.255.255.255 "),
+ [OPTION_STRING ] = 1,
+ #if ENABLE_FEATURE_UDHCP_RFC3397
+ [OPTION_DNS_STRING ] = 1, /* unused */
+@@ -68,6 +69,23 @@ static int sprint_nip(char *dest, const
+ return sprintf(dest, "%s%u.%u.%u.%u", pre, ip[0], ip[1], ip[2], ip[3]);
+ }
+
++static int sprint_nip6(char *dest, const char *pre, const uint8_t *ip)
++{
++ int len = 0;
++ int off;
++ uint16_t word;
++
++ len += sprintf(dest, "%s", pre);
++
++ for (off = 0; off < 16; off += 2)
++ {
++ move_from_unaligned16(word, &ip[off]);
++ len += sprintf(dest+len, "%s%04X", off ? ":" : "", htons(word));
++ }
++
++ return len;
++}
++
+ /* really simple implementation, just count the bits */
+ static int mton(uint32_t mask)
+ {
+@@ -177,6 +195,60 @@ static NOINLINE char *xmalloc_optname_op
+
+ return ret;
+ }
++ case OPTION_6RD: {
++ /* Option binary format:
++ * 0 1 2 3
++ * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
++ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
++ * | OPTION_6RD | option-length | IPv4MaskLen | 6rdPrefixLen |
++ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
++ * | |
++ * | 6rdPrefix |
++ * | (16 octets) |
++ * | |
++ * | |
++ * | |
++ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
++ * | 6rdBRIPv4Address(es) |
++ * . .
++ * . .
++ * . .
++ * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
++ *
++ * We convert it to a string "IPv4MaskLen 6rdPrefixLen 6rdPrefix 6rdBRIPv4Address"
++ */
++
++ /* IPv4MaskLen */
++ dest += sprintf(dest, "%u ", *option++);
++ len--;
++
++ /* 6rdPrefixLen */
++ dest += sprintf(dest, "%u ", *option++);
++ len--;
++
++ /* 6rdPrefix */
++ dest += sprint_nip6(dest, "", option);
++ option += 16;
++ len -= 16;
++
++ /* 6rdBRIPv4Addresses */
++ while (len >= 4)
++ {
++ dest += sprint_nip(dest, " ", option);
++ option += 4;
++ len -= 4;
++
++ /* the code to determine the option size fails to work with
++ * lengths that are not a multiple of the minimum length,
++ * adding all advertised 6rdBRIPv4Addresses here would
++ * overflow the destination buffer, therefore skip the rest
++ * for now
++ */
++ break;
++ }
++
++ return ret;
++ }
+ #if ENABLE_FEATURE_UDHCP_RFC3397
+ case OPTION_DNS_STRING:
+ /* unpack option into dest; use ret for prefix (i.e., "optname=") */
+--- a/networking/udhcp/common.h
++++ b/networking/udhcp/common.h
+@@ -88,6 +88,7 @@ enum {
+ OPTION_S32,
+ OPTION_BIN,
+ OPTION_STATIC_ROUTES,
++ OPTION_6RD,
+ #if ENABLE_FEATURE_UDHCP_RFC3397
+ OPTION_DNS_STRING, /* RFC1035 compressed domain name list */
+ OPTION_SIP_SERVERS,