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tap: Completely de-serialise input message batches

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Until now, messages would be passed to protocol handlers in a single
batch only if they happened to be dequeued in a row. Packets
interleaved between different connections would result in multiple
calls to the same protocol handler for a single connection.

Instead, keep track of incoming packet descriptors, arrange them in
sequences, and call protocol handlers only as we completely sorted
input messages in batches.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio
2021-09-26 23:38:22 +02:00
parent dfc4513190
commit dd581730e5
7 changed files with 444 additions and 275 deletions
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4
udp.h
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@@ -6,8 +6,8 @@
void udp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events,
struct timespec *now);
int udp_tap_handler(struct ctx *c, int af, void *addr,
struct tap_msg *msg, int count, struct timespec *now);
int udp_sock_init(struct ctx *c);
struct tap_l4_msg *msg, int count, struct timespec *now);
int udp_sock_init(struct ctx *c, struct timespec *now);
void udp_timer(struct ctx *c, struct timespec *ts);
void udp_update_l2_buf(unsigned char *eth_d, unsigned char *eth_s,
uint32_t *ip_da);