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conf, tap: Split netlink and pasta functions, allow interface configuration

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Move netlink routines to their own file, and use netlink to configure
or fetch all the information we need, except for the TUNSETIFF ioctl.

Move pasta-specific functions to their own file as well, add
parameters and calls to configure the tap interface in the namespace.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2021-10-11 12:01:31 +02:00
parent dcd3605d14
commit 675174d4ba
11 changed files with 703 additions and 609 deletions

9
util.h
View file

@ -39,6 +39,12 @@ void debug(const char *format, ...);
#define V6 1
#define IP_VERSIONS 2
enum {
IP_VERSION_DISABLED = 0,
IP_VERSION_ENABLED,
IP_VERSION_PROBE,
};
#define ARRAY_SIZE(a) ((int)(sizeof(a) / sizeof((a)[0])))
#define IN_INTERVAL(a, b, x) ((x) >= (a) && (x) <= (b))
@ -48,6 +54,9 @@ void debug(const char *format, ...);
#define PORT_EPHEMERAL_MIN ((1 << 15) + (1 << 14)) /* RFC 6335 */
#define PORT_IS_EPHEMERAL(port) ((port) >= PORT_EPHEMERAL_MIN)
#define MAC_ZERO ((uint8_t [ETH_ALEN]){ 0 })
#define MAC_IS_ZERO(addr) (!memcmp((addr), MAC_ZERO, ETH_ALEN))
#define NS_FN_STACK_SIZE (RLIMIT_STACK_VAL * 1024 / 4)
#define NS_CALL(fn, arg) \
do { \