diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/libslirp.h | 3 | ||||
| -rw-r--r-- | src/slirp.c | 7 |
2 files changed, 8 insertions, 2 deletions
diff --git a/src/libslirp.h b/src/libslirp.h index 5760d53..8e4ea33 100644 --- a/src/libslirp.h +++ b/src/libslirp.h @@ -68,7 +68,8 @@ typedef struct SlirpCb { void (*register_poll_fd)(int fd, void *opaque); /* Unregister a fd */ void (*unregister_poll_fd)(int fd, void *opaque); - /* Kick the io-thread, to signal that new events may be processed */ + /* Kick the io-thread, to signal that new events may be processed because some TCP buffer + * can now receive more data, i.e. slirp_socket_can_recv will return 1. */ void (*notify)(void *opaque); } SlirpCb; diff --git a/src/slirp.c b/src/slirp.c index 0583e5b..378a70b 100644 --- a/src/slirp.c +++ b/src/slirp.c @@ -613,7 +613,10 @@ void slirp_pollfds_fill(Slirp *slirp, uint32_t *timeout, /* * Set for reading (and urgent data) if we are connected, can - * receive more, and we have room for it XXX /2 ? + * receive more, and we have room for it. + * + * If sb is already half full, we will wait for the guest to consume it, + * and notify again in sbdrop() when the sb becomes less than half full. */ if (CONN_CANFRCV(so) && (so->so_snd.sb_cc < (so->so_snd.sb_datalen / 2))) { @@ -1359,6 +1362,8 @@ size_t slirp_socket_can_recv(Slirp *slirp, struct in_addr guest_addr, } if (!CONN_CANFRCV(so) || so->so_snd.sb_cc >= (so->so_snd.sb_datalen / 2)) { + /* If the sb is already half full, we will wait for the guest to consume it, + * and notify again in sbdrop() when the sb becomes less than half full. */ return 0; } |