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passt, pasta: Completely avoid dynamic memory allocation

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Replace libc functions that might dynamically allocate memory with own
implementations or wrappers.

Drop brk(2) from list of allowed syscalls in seccomp profile.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio
2021-10-14 01:21:29 +02:00
parent 66d5930ec7
commit 32d07f5e59
6 changed files with 389 additions and 28 deletions
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4
dhcpv6.c
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@@ -588,10 +588,10 @@ int dhcpv6(struct ctx *c, struct ethhdr *eh, size_t len)
*/
void dhcpv6_init(struct ctx *c)
{
struct tm y2k = { 0, 0, 0, 1, 0, 100, 0, 0, 0, 0, NULL };
time_t y2k = 946684800; /* Epoch to 2000-01-01T00:00:00Z, no mktime() */
uint32_t duid_time;
duid_time = htonl(difftime(time(NULL), mktime(&y2k)));
duid_time = htonl(difftime(time(NULL), y2k));
resp.server_id.duid_time = duid_time;
resp_not_on_link.server_id.duid_time = duid_time;