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TCP: added a unit test for trimming left side of rx segment

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This commit is contained in:
goldsimon 2017-08-21 22:34:01 +02:00
parent bd8709bc82
commit 22ee33951b
1 changed files with 55 additions and 0 deletions
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55
test/unit/tcp/test_tcp.c
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@ -139,6 +139,60 @@ START_TEST(test_tcp_recv_inseq)
}
END_TEST
/** Create an ESTABLISHED pcb and check if receive callback is called if a segment
* overlapping rcv_nxt is received */
START_TEST(test_tcp_recv_inseq_trim)
{
struct test_tcp_counters counters;
struct tcp_pcb* pcb;
struct pbuf* p;
char data[PBUF_POOL_BUFSIZE*2];
u16_t data_len;
struct netif netif;
struct test_tcp_txcounters txcounters;
const u32_t new_data_len = 40;
LWIP_UNUSED_ARG(_i);
/* initialize local vars */
test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
data_len = sizeof(data);
memset(data, 0, sizeof(data));
/* initialize counter struct */
memset(&counters, 0, sizeof(counters));
counters.expected_data_len = data_len;
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 (with an overlapping/old seqno so that the new data begins in the 2nd pbuf) */
p = tcp_create_rx_segment(pcb, counters.expected_data, data_len, (u32_t)(0-(data_len-new_data_len)), 0, 0);
EXPECT(p != NULL);
if (p != NULL) {
EXPECT(p->next != NULL);
if (p->next != NULL) {
EXPECT(p->next->next != NULL);
}
}
if ((p != NULL) && (p->next != NULL) && (p->next->next != NULL)) {
/* pass the segment to tcp_input */
test_tcp_input(p, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 1);
EXPECT(counters.recved_bytes == new_data_len);
EXPECT(counters.err_calls == 0);
}
/* make sure the pcb is freed */
EXPECT(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
tcp_abort(pcb);
EXPECT(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
}
END_TEST
/** Check that we handle malformed tcp headers, and discard the pbuf(s) */
START_TEST(test_tcp_malformed_header)
{
@ -1004,6 +1058,7 @@ tcp_suite(void)
testfunc tests[] = {
TESTFUNC(test_tcp_new_abort),
TESTFUNC(test_tcp_recv_inseq),
TESTFUNC(test_tcp_recv_inseq_trim),
TESTFUNC(test_tcp_malformed_header),
TESTFUNC(test_tcp_fast_retx_recover),
TESTFUNC(test_tcp_fast_rexmit_wraparound),