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sd-dhcp: make sure we can not fill options so much that there is no space for END

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This commit is contained in:
Tom Gundersen 2014-05-21 15:27:53 +02:00
parent f5602be9da
commit 2688ef60de
2 changed files with 5 additions and 1 deletions
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4
src/libsystemd-network/dhcp-option.c
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@ -31,6 +31,10 @@ int dhcp_option_append(uint8_t options[], size_t size, size_t *offset,
assert(options);
assert(offset);
if (code != DHCP_OPTION_END)
/* always make sure there is space for an END option */
size --;
switch (code) {
case DHCP_OPTION_PAD:

2
src/libsystemd-network/test-dhcp-option.c
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@ -85,7 +85,7 @@ static void test_invalid_buffer_length(void)
static void test_message_init(void)
{
_cleanup_free_ DHCPMessage *message = NULL;
size_t optlen = 3, optoffset;
size_t optlen = 4, optoffset;
size_t len = sizeof(DHCPMessage) + optlen;
uint8_t *magic;