diff options
| -rw-r--r-- | networking/udhcp/options.c | 45 |
1 files changed, 17 insertions, 28 deletions
diff --git a/networking/udhcp/options.c b/networking/udhcp/options.c index ae9819413..000f86c79 100644 --- a/networking/udhcp/options.c +++ b/networking/udhcp/options.c @@ -149,37 +149,26 @@ int add_option_string(uint8_t *optionptr, uint8_t *string) /* add a one to four byte option to a packet */ int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data) { - char length = 0; - int i; - uint8_t option[2 + 4]; - uint8_t *u8; - uint16_t *u16; - uint32_t *u32; - uint32_t aligned; - u8 = (uint8_t *) &aligned; - u16 = (uint16_t *) &aligned; - u32 = &aligned; - - for (i = 0; dhcp_options[i].code; i++) - if (dhcp_options[i].code == code) { - length = option_lengths[dhcp_options[i].flags & TYPE_MASK]; + struct dhcp_option *dh; + + for (dh=dhcp_options; dh->code; dh++) { + if (dh->code == code) { + uint8_t option[6], len; + + option[OPT_CODE] = code; + len = option_lengths[dh->flags & TYPE_MASK]; + option[OPT_LEN] = len; + if (__BYTE_ORDER == __BIG_ENDIAN) + data <<= 8 * (4 - len); + /* This memcpy is for broken processors which can't + * handle a simple unaligned 32-bit assignment */ + memcpy(&option[OPT_DATA], &data, 4); + return add_option_string(optionptr, option); } - - if (!length) { - DEBUG(LOG_ERR, "Could not add option 0x%02x", code); - return 0; } - option[OPT_CODE] = code; - option[OPT_LEN] = length; - - switch (length) { - case 1: *u8 = data; break; - case 2: *u16 = data; break; - case 4: *u32 = data; break; - } - memcpy(option + 2, &aligned, length); - return add_option_string(optionptr, option); + DEBUG(LOG_ERR, "Could not add option 0x%02x", code); + return 0; } |