When we process events from epoll_wait(), we check for a number of special
cases before calling sock_handler() which then dispatches based on the
protocol type of the socket in the event.
Fold these cases together into a single switch on the fd type recorded in
the epoll data field.
Signed-off-by: David Gibson <david(a)gibson.dropbear.id.au>
---
passt.c | 54 +++++++++++++++++++++++++++---------------------------
1 file changed, 27 insertions(+), 27 deletions(-)
diff --git a/passt.c b/passt.c
index 195fccf..32ea2ca 100644
--- a/passt.c
+++ b/passt.c
@@ -64,29 +64,6 @@ char *epoll_type_str[EPOLL_TYPE_MAX+1] = {
[EPOLL_TYPE_TAP] = "tap device",
};
-/**
- * sock_handler() - Event handler for L4 sockets
- * @c: Execution context
- * @ref: epoll reference
- * @events: epoll events
- * @now: Current timestamp
- */
-static void sock_handler(struct ctx *c, union epoll_ref ref,
- uint32_t events, const struct timespec *now)
-{
- trace("%s: packet from %s %i (events: 0x%08x)",
- c->mode == MODE_PASST ? "passt" : "pasta",
- EPOLL_TYPE_STR(ref.type), ref.fd, events);
-
- if (!c->no_tcp && ref.type == EPOLL_TYPE_TCP)
- tcp_sock_handler(c, ref, events, now);
- else if (!c->no_udp && ref.type == EPOLL_TYPE_UDP)
- udp_sock_handler(c, ref, events, now);
- else if (!c->no_icmp &&
- (ref.type == EPOLL_TYPE_ICMP || ref.type == EPOLL_TYPE_ICMPV6))
- icmp_sock_handler(c, ref, events, now);
-}
-
/**
* post_handler() - Run periodic and deferred tasks for L4 protocol handlers
* @c: Execution context
@@ -330,13 +307,36 @@ loop:
for (i = 0; i < nfds; i++) {
union epoll_ref ref = *((union epoll_ref *)&events[i].data.u64);
+ uint32_t eventmask = events[i].events;
- if (ref.type == EPOLL_TYPE_TAP)
+ trace("%s: epoll event on %s %i (events: 0x%08x)",
+ c.mode == MODE_PASST ? "passt" : "pasta",
+ EPOLL_TYPE_STR(ref.type), ref.fd, events);
+
+ switch (ref.type) {
+ case EPOLL_TYPE_TAP:
tap_handler(&c, ref.fd, events[i].events, &now);
- else if (ref.type == EPOLL_TYPE_NSQUIT)
+ break;
+ case EPOLL_TYPE_NSQUIT:
pasta_netns_quit_handler(&c, quit_fd);
- else
- sock_handler(&c, ref, events[i].events, &now);
+ break;
+ case EPOLL_TYPE_TCP:
+ if (!c.no_tcp)
+ tcp_sock_handler(&c, ref, eventmask, &now);
+ break;
+ case EPOLL_TYPE_UDP:
+ if (!c.no_udp)
+ udp_sock_handler(&c, ref, eventmask, &now);
+ break;
+ case EPOLL_TYPE_ICMP:
+ case EPOLL_TYPE_ICMPV6:
+ if (!c.no_icmp)
+ icmp_sock_handler(&c, ref, eventmask, &now);
+ break;
+ default:
+ /* Can't happen */
+ ASSERT(0);
+ }
}
post_handler(&c, &now);
--
2.41.0