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scan: Break up logic into utility functions

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Some fairly common logic was duplicated across functions.  Split it up
into common utilities
This commit is contained in:
Denis Kenzior 2018-07-11 17:20:06 -05:00
parent dfe74ea8ff
commit 48e9f2aee0
1 changed files with 28 additions and 39 deletions
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65
src/scan.c
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@ -117,6 +117,17 @@ static void scan_request_free(void *data)
l_free(sr);
}
static void scan_request_trigger_failed(struct scan_request *sr, int err)
{
if (sr->trigger)
sr->trigger(err, sr->userdata);
if (sr->destroy)
sr->destroy(sr->userdata);
scan_request_free(sr);
}
static struct scan_context *scan_context_new(uint32_t ifindex)
{
struct netdev *netdev = netdev_find(ifindex);
@ -220,14 +231,8 @@ static void scan_triggered(struct l_genl_msg *msg, void *userdata)
if (err == -EBUSY)
return;
if (sr->trigger)
sr->trigger(err, sr->userdata);
if (sr->destroy)
sr->destroy(sr->userdata);
l_queue_pop_head(sc->requests);
scan_request_free(sr);
scan_request_trigger_failed(sr, err);
l_error("Received error during CMD_TRIGGER_SCAN: %s (%d)",
strerror(-err), -err);
@ -379,29 +384,19 @@ static void scan_cmds_add(struct l_queue *cmds, struct scan_context *sc,
l_queue_push_tail(cmds, cmd);
}
static bool scan_request_send_first_cmd(struct scan_context *sc,
static int scan_request_send_next(struct scan_context *sc,
struct scan_request *sr)
{
struct l_genl_msg *cmd = l_queue_pop_head(sr->cmds);
if (!cmd)
goto error;
return -ENOMSG;
sc->start_cmd_id = scan_send_start(&cmd, scan_triggered, sc);
if (sc->start_cmd_id)
return true;
return 0;
l_genl_msg_unref(cmd);
error:
if (sr->trigger)
sr->trigger(-EIO, sr->userdata);
if (sr->destroy)
sr->destroy(sr->userdata);
scan_request_free(sr);
return false;
return -EIO;
}
static uint32_t scan_common(uint32_t ifindex, bool passive,
@ -436,9 +431,10 @@ static uint32_t scan_common(uint32_t ifindex, bool passive,
if (sc->state != SCAN_STATE_NOT_RUNNING || sc->start_cmd_id)
goto done;
if (scan_request_send_first_cmd(sc, sr))
if (!scan_request_send_next(sc, sr))
goto done;
scan_request_trigger_failed(sr, -EIO);
return 0;
done:
l_queue_push_tail(sc->requests, sr);
@ -693,10 +689,11 @@ static bool start_next_scan_request(struct scan_context *sc)
while (!l_queue_isempty(sc->requests)) {
sr = l_queue_peek_head(sc->requests);
if (scan_request_send_first_cmd(sc, sr))
if (!scan_request_send_next(sc, sr))
return true;
l_queue_pop_head(sc->requests);
scan_request_trigger_failed(sr, -EIO);
}
if (sc->sp.retry) {
@ -1150,29 +1147,21 @@ static void scan_parse_new_scan_results(struct l_genl_msg *msg,
static bool scan_send_next_cmd(struct scan_context *sc)
{
struct scan_request *sr = l_queue_peek_head(sc->requests);
struct l_genl_msg *cmd;
int err;
if (sr && sr->triggered) {
cmd = l_queue_pop_head(sr->cmds);
if (!cmd)
return false;
sr->triggered = false;
sc->start_cmd_id = scan_send_start(&cmd, scan_triggered, sc);
if (sc->start_cmd_id)
err = scan_request_send_next(sc, sr);
if (!err)
return true;
l_genl_msg_unref(cmd);
if (sr->trigger)
sr->trigger(-EIO, sr->userdata);
if (sr->destroy)
sr->destroy(sr->userdata);
/* Nothing left in the scan_request queue, we're done */
if (err < 0 && err == -ENOMSG)
return false;
sr = l_queue_pop_head(sc->requests);
scan_request_free(sr);
scan_request_trigger_failed(sr, -EIO);
/*
* The request is destroyed, return 'true' to stop further