Picotcp tends to work in an asynchronious way.
E.g. for ping we have to use "pico_icmp4_ping()"
(to start ping task) and the special icmp4 handler
(callback function) "cb_ping()".
But the ping command in barebox works in very simple
way:
* user types 'ping <IP>' in the barebox shell command line;
* the ping command takes all control until it gets the positive
or a negative result;
* the control is returned to the barebox shell.
To use asynchronious-oriented picotcp functions in syncronious-oriented
barebox workflow we have to work out necessary picotcp usage template.
This patch propose simplest template. But this template has two major
disadvantages:
* user can't completely cancel ping using ctrl-c,
the ping request send task continue to work in the background:
barebox@barebox sandbox:/ picoping 10.0.0.2
48 bytes from 10.0.0.2: icmp_req=1 ttl=64 time=0 ms
48 bytes from 10.0.0.2: icmp_req=2 ttl=64 time=0 ms
48 bytes from 10.0.0.2: icmp_req=3 ttl=64 time=0 ms
<ctrl-c> pressed
barebox@barebox sandbox:/ picoping 10.0.0.2
48 bytes from 10.0.0.2: icmp_req=1 ttl=64 time=1 ms
48 bytes from 10.0.0.2: icmp_req=5 ttl=64 time=0 ms
48 bytes from 10.0.0.2: icmp_req=2 ttl=64 time=0 ms
48 bytes from 10.0.0.2: icmp_req=6 ttl=64 time=0 ms
48 bytes from 10.0.0.2: icmp_req=3 ttl=64 time=0 ms
48 bytes from 10.0.0.2: icmp_req=7 ttl=64 time=0 ms
48 bytes from 10.0.0.2: icmp_req=4 ttl=64 time=0 ms
48 bytes from 10.0.0.2: icmp_req=8 ttl=64 time=0 ms
* user has to press <ctrl-c> after the last ping response is received
to return to barebox shell.
Has anybody any ideas how to improve the situation?
---
net/test_picotcp.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/net/test_picotcp.c b/net/test_picotcp.c
index 5f7138e..035ef09 100644
--- a/net/test_picotcp.c
+++ b/net/test_picotcp.c
@@ -98,9 +98,15 @@ BAREBOX_CMD_START(test_picotcp)
BAREBOX_CMD_END
#include <pico_icmp4.h>
+#include <poller.h>
#define NUM_PING 10
+#define PING_STATE_WORK 0
+#define PING_STATE_DONE 1
+
+static int ping_state;
+
/* callback function for receiving ping reply */
void cb_ping(struct pico_icmp4_stats *s)
{
@@ -108,6 +114,10 @@ void cb_ping(struct pico_icmp4_stats *s)
int time_sec = 0;
int time_msec = 0;
+ if (ping_state == PING_STATE_DONE) {
+ return;
+ }
+
/* convert ip address from icmp4_stats structure to string */
pico_ipv4_to_string(host, s->dst.addr);
@@ -132,8 +142,19 @@ static int do_picoping(int argc, char *argv[])
return 1;
}
+ ping_state = PING_STATE_WORK;
+
pico_icmp4_ping(argv[1], NUM_PING, 1000, 5000, 48, cb_ping);
+ while (ping_state != PING_STATE_DONE) {
+ if (ctrlc()) {
+ ping_state = PING_STATE_DONE;
+ break;
+ }
+ get_time_ns();
+ poller_call();
+ }
+
return 0;
}
--
1.9.2
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