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Fix 'RemoveDefGwOnDhcpForLocalhost' function No.2: Change the minimum size of DHCP reply

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This commit is contained in:
hiura 2024-04-16 10:30:10 +09:00
parent eb793dc257
commit c36d7187a8
1 changed files with 5 additions and 2 deletions
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7
src/Mayaqua/TcpIp.c
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@ -4168,6 +4168,7 @@ BUF *DhcpModify(DHCP_MODIFY_OPTION *m, void *data, UINT size)
LIST *opt_list2 = NULL;
UINT src_size = size;
UINT i;
UINT dhcp_min_size;
// Validate arguments
if (m == NULL || data == NULL || size == 0)
{
@ -4270,11 +4271,13 @@ BUF *DhcpModify(DHCP_MODIFY_OPTION *m, void *data, UINT size)
// Rewrite if anything changes. Do not rewrite if there is no change
ret_ok = true;
if (ret->Size < DHCP_MIN_SIZE)
// If src_size is greater than DHCP_MIN_SIZE, then use the src_size as minimum size of DHCP.
dhcp_min_size = max(src_size, DHCP_MIN_SIZE);
if (ret->Size < dhcp_min_size)
{
// Padding
UCHAR *pad_buf;
UINT pad_size = DHCP_MIN_SIZE - ret->Size;
UINT pad_size = dhcp_min_size - ret->Size;
pad_buf = ZeroMalloc(pad_size);