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add test case that shows what's wrong for bug #51937 (Leaking tcp_pcbs on passive close with unacked data)

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This commit is contained in:
goldsimon 2017-09-05 22:19:38 +02:00
parent fca38fda1a
commit cf651e7e0f
1 changed files with 78 additions and 0 deletions
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78
test/unit/tcp/test_tcp.c
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@ -252,6 +252,83 @@ START_TEST(test_tcp_recv_inseq_trim)
}
END_TEST
static err_t test_tcp_recv_expect1byte(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err);
static err_t
test_tcp_recv_expectclose(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err)
{
EXPECT_RETX(pcb != NULL, ERR_OK);
EXPECT_RETX(err == ERR_OK, ERR_OK);
LWIP_UNUSED_ARG(arg);
if (p != NULL) {
fail();
pbuf_free(p);
} else {
/* correct: FIN received; close our end, too */
err_t err = tcp_close(pcb);
fail_unless(err == ERR_OK);
/* set back to some other rx function, just to not get here again */
tcp_recv(pcb, test_tcp_recv_expect1byte);
}
return ERR_OK;
}
static err_t
test_tcp_recv_expect1byte(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err)
{
EXPECT_RETX(pcb != NULL, ERR_OK);
EXPECT_RETX(err == ERR_OK, ERR_OK);
LWIP_UNUSED_ARG(arg);
if (p != NULL) {
if (p->len == p->tot_len == 1) {
tcp_recv(pcb, test_tcp_recv_expectclose);
} else {
fail();
}
pbuf_free(p);
} else {
fail();
}
return ERR_OK;
}
START_TEST(test_tcp_passive_close)
{
struct test_tcp_counters counters;
struct tcp_pcb* pcb;
struct pbuf* p;
char data = 0xaf;
struct netif netif;
struct test_tcp_txcounters txcounters;
LWIP_UNUSED_ARG(_i);
/* initialize local vars */
test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
/* initialize counter struct */
memset(&counters, 0, sizeof(counters));
counters.expected_data_len = 1;
counters.expected_data = &data;
/* create and initialize the pcb */
pcb = test_tcp_new_counters_pcb(&counters);
EXPECT_RET(pcb != NULL);
tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
/* create a segment without data */
p = tcp_create_rx_segment(pcb, &data, 1, 0, 0, TCP_FIN);
EXPECT(p != NULL);
if (p != NULL) {
tcp_recv(pcb, test_tcp_recv_expect1byte);
/* pass the segment to tcp_input */
test_tcp_input(p, &netif);
}
/* don't free the pcb here (part of the test!) */
}
END_TEST
/** Check that we handle malformed tcp headers, and discard the pbuf(s) */
START_TEST(test_tcp_malformed_header)
{
@ -1269,6 +1346,7 @@ tcp_suite(void)
TESTFUNC(test_tcp_listen_passive_open),
TESTFUNC(test_tcp_recv_inseq),
TESTFUNC(test_tcp_recv_inseq_trim),
TESTFUNC(test_tcp_passive_close),
TESTFUNC(test_tcp_malformed_header),
TESTFUNC(test_tcp_fast_retx_recover),
TESTFUNC(test_tcp_fast_rexmit_wraparound),