diff options
Diffstat (limited to 'package/busybox/patches/244-udhcpc_add_6rd_option.patch')
| -rw-r--r-- | package/busybox/patches/244-udhcpc_add_6rd_option.patch | 143 |
1 files changed, 143 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 000000000..9e30ef79a --- /dev/null +++ b/package/busybox/patches/244-udhcpc_add_6rd_option.patch @@ -0,0 +1,143 @@ +--- a/networking/udhcp/common.c ++++ b/networking/udhcp/common.c +@@ -60,6 +60,8 @@ const struct dhcp_optflag dhcp_optflags[ + { OPTION_U8 , 0x85 }, /* DHCP_VLAN_PRIORITY */ + #endif + { OPTION_STATIC_ROUTES , 0xf9 }, /* DHCP_MS_STATIC_ROUTES */ ++ { OPTION_6RD , 0xd4 }, /* DHCP_6RD (RFC) */ ++ { OPTION_6RD , 0x96 }, /* DHCP_6RD (Comcast) */ + { OPTION_STRING , 0xfc }, /* DHCP_WPAD */ + + /* Options below have no match in dhcp_option_strings[], +@@ -127,6 +129,8 @@ const char dhcp_option_strings[] ALIGN1 + "vlanpriority" "\0"/* DHCP_VLAN_PRIORITY */ + #endif + "msstaticroutes""\0"/* DHCP_MS_STATIC_ROUTES */ ++ "ip6rd" "\0" /* DHCP_6RD (RFC) */ ++ "ip6rd" "\0" /* DHCP_6RD (Comcast) */ + "wpad" "\0" /* DHCP_WPAD */ + ; + +@@ -154,6 +158,7 @@ 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/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, +--- a/networking/udhcp/dhcpc.c ++++ b/networking/udhcp/dhcpc.c +@@ -100,6 +100,7 @@ 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 */ +@@ -123,6 +124,23 @@ 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) + { +@@ -231,6 +249,70 @@ 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" ++ */ ++ ++ /* Sanity check: ensure that our length is at least 22 bytes, that ++ * IPv4MaskLen is <= 32, 6rdPrefixLen <= 128 and that the sum of ++ * (32 - IPv4MaskLen) + 6rdPrefixLen is less than or equal to 128. ++ * If any of these requirements is not fulfilled, return with empty ++ * value. ++ */ ++ if ((len >= 22) && (*option <= 32) && (*(option+1) <= 128) && ++ (((32 - *option) + *(option+1)) <= 128)) ++ { ++ /* 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: |