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capwap-mitm
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handle read error correctly and remove the WTP

This commit is contained in:
Andreas Schultz 2014-12-30 15:30:59 +01:00
parent d96b0798c1
commit 0ff432fcc6
1 changed files with 17 additions and 8 deletions
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25
src/capwap-mitm.c
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@ -272,6 +272,17 @@ static void capwap_dump(struct sockaddr *src, struct sockaddr *dst, const unsign
}
static void remove_wtp(EV_P_ struct wtp *wtp)
{
ev_timer_stop (EV_A_ &wtp->timeout);
ev_io_stop (EV_A_ &wtp->client_ev);
if (wtp->server.fd)
close(wtp->server.fd);
RB_REMOVE(wtp_tree, &wtp_tree, wtp);
free(wtp);
}
static void capwap_server_in(EV_P_ struct capwap_port *capwap_port, unsigned char *buffer, ssize_t len, struct sockaddr *addr, socklen_t addrlen);
static void capwap_fwd(struct wtp *wtp, unsigned char *buffer, ssize_t len);
@ -288,12 +299,17 @@ static void capwap_server_cb(EV_P_ ev_io *ev, int revents)
do {
r = recvfrom(ev->fd, buffer, sizeof(buffer), MSG_DONTWAIT, (struct sockaddr *)&addr, &addrlen);
if (r < 0) {
struct wtp *wtp;
if (errno == EAGAIN)
break;
else if (errno == EINTR)
continue;
debug("capwap read error: %m");
if ((wtp = RB_FIND(wtp_tree, &wtp_tree, (struct wtp *)&addr)))
remove_wtp(EV_A_ wtp);
return;
} else
capwap_server_in(EV_A_ capwap_port, buffer, r, (struct sockaddr *)&addr, addrlen);
@ -305,14 +321,7 @@ static void wtp_timeout_cb(EV_P_ ev_timer *w, int revents)
struct wtp *wtp = container_of(w, struct wtp, timeout);
debug("got timeout for WTP at %p", wtp);
ev_timer_stop (EV_A_ w);
ev_io_stop (EV_A_ &wtp->client_ev);
if (wtp->server.fd)
close(wtp->server.fd);
RB_REMOVE(wtp_tree, &wtp_tree, wtp);
free(wtp);
remove_wtp(EV_A_ wtp);
}
static void capwap_client_cb(EV_P_ ev_io *ev, int revents)