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lwip/test/unit/tcp/test_tcp_oos.c
Joel Cunningham 6fe66771cb test_tcp: de-duplicate test IP addresses, netmask, and ports 
This creates a single version of test IP addresses, netmasks, and ports.
All tests were using the same values, but duplicated in each test

This also adds const to some functions so we can use a const version
of addresses
2017-03-31 12:01:43 -05:00

1017 lines
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#include "test_tcp_oos.h"
#include "lwip/priv/tcp_priv.h"
#include "lwip/stats.h"
#include "tcp_helper.h"
#if !LWIP_STATS || !TCP_STATS || !MEMP_STATS
#error "This tests needs TCP- and MEMP-statistics enabled"
#endif
#if !TCP_QUEUE_OOSEQ
#error "This tests needs TCP_QUEUE_OOSEQ enabled"
#endif
/** CHECK_SEGMENTS_ON_OOSEQ:
* 1: check count, seqno and len of segments on pcb->ooseq (strict)
* 0: only check that bytes are received in correct order (less strict) */
#define CHECK_SEGMENTS_ON_OOSEQ 1
#if CHECK_SEGMENTS_ON_OOSEQ
#define EXPECT_OOSEQ(x) EXPECT(x)
#else
#define EXPECT_OOSEQ(x)
#endif
/* helper functions */
/** Get the numbers of segments on the ooseq list */
static int tcp_oos_count(struct tcp_pcb* pcb)
{
int num = 0;
struct tcp_seg* seg = pcb->ooseq;
while(seg != NULL) {
num++;
seg = seg->next;
}
return num;
}
#if TCP_OOSEQ_MAX_PBUFS && (TCP_OOSEQ_MAX_PBUFS < ((TCP_WND / TCP_MSS) + 1)) && (PBUF_POOL_BUFSIZE >= (TCP_MSS + PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN))
/** Get the numbers of pbufs on the ooseq list */
static int tcp_oos_pbuf_count(struct tcp_pcb* pcb)
{
int num = 0;
struct tcp_seg* seg = pcb->ooseq;
while(seg != NULL) {
num += pbuf_clen(seg->p);
seg = seg->next;
}
return num;
}
#endif
/** Get the seqno of a segment (by index) on the ooseq list
*
* @param pcb the pcb to check for ooseq segments
* @param seg_index index of the segment on the ooseq list
* @return seqno of the segment
*/
static u32_t
tcp_oos_seg_seqno(struct tcp_pcb* pcb, int seg_index)
{
int num = 0;
struct tcp_seg* seg = pcb->ooseq;
/* then check the actual segment */
while(seg != NULL) {
if(num == seg_index) {
return seg->tcphdr->seqno;
}
num++;
seg = seg->next;
}
fail();
return 0;
}
/** Get the tcplen (datalen + SYN/FIN) of a segment (by index) on the ooseq list
*
* @param pcb the pcb to check for ooseq segments
* @param seg_index index of the segment on the ooseq list
* @return tcplen of the segment
*/
static int
tcp_oos_seg_tcplen(struct tcp_pcb* pcb, int seg_index)
{
int num = 0;
struct tcp_seg* seg = pcb->ooseq;
/* then check the actual segment */
while(seg != NULL) {
if(num == seg_index) {
return TCP_TCPLEN(seg);
}
num++;
seg = seg->next;
}
fail();
return -1;
}
/** Get the tcplen (datalen + SYN/FIN) of all segments on the ooseq list
*
* @param pcb the pcb to check for ooseq segments
* @return tcplen of all segment
*/
static int
tcp_oos_tcplen(struct tcp_pcb* pcb)
{
int len = 0;
struct tcp_seg* seg = pcb->ooseq;
/* then check the actual segment */
while(seg != NULL) {
len += TCP_TCPLEN(seg);
seg = seg->next;
}
return len;
}
/* Setup/teardown functions */
static struct netif *old_netif_list;
static struct netif *old_netif_default;
static void
tcp_oos_setup(void)
{
old_netif_list = netif_list;
old_netif_default = netif_default;
netif_list = NULL;
netif_default = NULL;
tcp_remove_all();
}
static void
tcp_oos_teardown(void)
{
netif_list = NULL;
netif_default = NULL;
tcp_remove_all();
/* restore netif_list for next tests (e.g. loopif) */
netif_list = old_netif_list;
netif_default = old_netif_default;
}
/* Test functions */
/** create multiple segments and pass them to tcp_input in a wrong
* order to see if ooseq-caching works correctly
* FIN is received in out-of-sequence segments only */
START_TEST(test_tcp_recv_ooseq_FIN_OOSEQ)
{
struct test_tcp_counters counters;
struct tcp_pcb* pcb;
struct pbuf *p_8_9, *p_4_8, *p_4_10, *p_2_14, *p_fin, *pinseq;
char data[] = {
1, 2, 3, 4,
5, 6, 7, 8,
9, 10, 11, 12,
13, 14, 15, 16};
u16_t data_len;
struct netif netif;
LWIP_UNUSED_ARG(_i);
/* initialize local vars */
test_tcp_init_netif(&netif, NULL, &test_local_ip, &test_netmask);
data_len = 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 segments */
/* pinseq is sent as last segment! */
pinseq = tcp_create_rx_segment(pcb, &data[0], 4, 0, 0, TCP_ACK);
/* p1: 8 bytes before FIN */
/* seqno: 8..16 */
p_8_9 = tcp_create_rx_segment(pcb, &data[8], 8, 8, 0, TCP_ACK|TCP_FIN);
/* p2: 4 bytes before p1, including the first 4 bytes of p1 (partly duplicate) */
/* seqno: 4..11 */
p_4_8 = tcp_create_rx_segment(pcb, &data[4], 8, 4, 0, TCP_ACK);
/* p3: same as p2 but 2 bytes longer */
/* seqno: 4..13 */
p_4_10 = tcp_create_rx_segment(pcb, &data[4], 10, 4, 0, TCP_ACK);
/* p4: 14 bytes before FIN, includes data from p1 and p2, plus partly from pinseq */
/* seqno: 2..15 */
p_2_14 = tcp_create_rx_segment(pcb, &data[2], 14, 2, 0, TCP_ACK);
/* FIN, seqno 16 */
p_fin = tcp_create_rx_segment(pcb, NULL, 0,16, 0, TCP_ACK|TCP_FIN);
EXPECT(pinseq != NULL);
EXPECT(p_8_9 != NULL);
EXPECT(p_4_8 != NULL);
EXPECT(p_4_10 != NULL);
EXPECT(p_2_14 != NULL);
EXPECT(p_fin != NULL);
if ((pinseq != NULL) && (p_8_9 != NULL) && (p_4_8 != NULL) && (p_4_10 != NULL) && (p_2_14 != NULL) && (p_fin != NULL)) {
/* pass the segment to tcp_input */
test_tcp_input(p_8_9, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 1);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 8);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 9); /* includes FIN */
/* pass the segment to tcp_input */
test_tcp_input(p_4_8, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 2);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 4);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 4);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 1) == 8);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 1) == 9); /* includes FIN */
/* pass the segment to tcp_input */
test_tcp_input(p_4_10, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* ooseq queue: unchanged */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 2);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 4);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 4);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 1) == 8);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 1) == 9); /* includes FIN */
/* pass the segment to tcp_input */
test_tcp_input(p_2_14, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 1);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 2);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 15); /* includes FIN */
/* pass the segment to tcp_input */
test_tcp_input(p_fin, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* ooseq queue: unchanged */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 1);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 2);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 15); /* includes FIN */
/* pass the segment to tcp_input */
test_tcp_input(pinseq, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 1);
EXPECT(counters.recv_calls == 1);
EXPECT(counters.recved_bytes == data_len);
EXPECT(counters.err_calls == 0);
EXPECT(pcb->ooseq == NULL);
}
/* 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
/** create multiple segments and pass them to tcp_input in a wrong
* order to see if ooseq-caching works correctly
* FIN is received IN-SEQUENCE at the end */
START_TEST(test_tcp_recv_ooseq_FIN_INSEQ)
{
struct test_tcp_counters counters;
struct tcp_pcb* pcb;
struct pbuf *p_1_2, *p_4_8, *p_3_11, *p_2_12, *p_15_1, *p_15_1a, *pinseq, *pinseqFIN;
char data[] = {
1, 2, 3, 4,
5, 6, 7, 8,
9, 10, 11, 12,
13, 14, 15, 16};
u16_t data_len;
struct netif netif;
LWIP_UNUSED_ARG(_i);
/* initialize local vars */
test_tcp_init_netif(&netif, NULL, &test_local_ip, &test_netmask);
data_len = 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 segments */
/* p1: 7 bytes - 2 before FIN */
/* seqno: 1..2 */
p_1_2 = tcp_create_rx_segment(pcb, &data[1], 2, 1, 0, TCP_ACK);
/* p2: 4 bytes before p1, including the first 4 bytes of p1 (partly duplicate) */
/* seqno: 4..11 */
p_4_8 = tcp_create_rx_segment(pcb, &data[4], 8, 4, 0, TCP_ACK);
/* p3: same as p2 but 2 bytes longer and one byte more at the front */
/* seqno: 3..13 */
p_3_11 = tcp_create_rx_segment(pcb, &data[3], 11, 3, 0, TCP_ACK);
/* p4: 13 bytes - 2 before FIN - should be ignored as contained in p1 and p3 */
/* seqno: 2..13 */
p_2_12 = tcp_create_rx_segment(pcb, &data[2], 12, 2, 0, TCP_ACK);
/* pinseq is the first segment that is held back to create ooseq! */
/* seqno: 0..3 */
pinseq = tcp_create_rx_segment(pcb, &data[0], 4, 0, 0, TCP_ACK);
/* p5: last byte before FIN */
/* seqno: 15 */
p_15_1 = tcp_create_rx_segment(pcb, &data[15], 1, 15, 0, TCP_ACK);
/* p6: same as p5, should be ignored */
p_15_1a= tcp_create_rx_segment(pcb, &data[15], 1, 15, 0, TCP_ACK);
/* pinseqFIN: last 2 bytes plus FIN */
/* only segment containing seqno 14 and FIN */
pinseqFIN = tcp_create_rx_segment(pcb, &data[14], 2, 14, 0, TCP_ACK|TCP_FIN);
EXPECT(pinseq != NULL);
EXPECT(p_1_2 != NULL);
EXPECT(p_4_8 != NULL);
EXPECT(p_3_11 != NULL);
EXPECT(p_2_12 != NULL);
EXPECT(p_15_1 != NULL);
EXPECT(p_15_1a != NULL);
EXPECT(pinseqFIN != NULL);
if ((pinseq != NULL) && (p_1_2 != NULL) && (p_4_8 != NULL) && (p_3_11 != NULL) && (p_2_12 != NULL)
&& (p_15_1 != NULL) && (p_15_1a != NULL) && (pinseqFIN != NULL)) {
/* pass the segment to tcp_input */
test_tcp_input(p_1_2, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 1);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 1);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 2);
/* pass the segment to tcp_input */
test_tcp_input(p_4_8, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 2);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 1);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 2);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 1) == 4);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 1) == 8);
/* pass the segment to tcp_input */
test_tcp_input(p_3_11, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 2);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 1);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 2);
/* p_3_11 has removed p_4_8 from ooseq */
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 1) == 3);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 1) == 11);
/* pass the segment to tcp_input */
test_tcp_input(p_2_12, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 2);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 1);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 1);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 1) == 2);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 1) == 12);
/* pass the segment to tcp_input */
test_tcp_input(pinseq, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 1);
EXPECT(counters.recved_bytes == 14);
EXPECT(counters.err_calls == 0);
EXPECT(pcb->ooseq == NULL);
/* pass the segment to tcp_input */
test_tcp_input(p_15_1, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 1);
EXPECT(counters.recved_bytes == 14);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 1);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 15);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 1);
/* pass the segment to tcp_input */
test_tcp_input(p_15_1a, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 1);
EXPECT(counters.recved_bytes == 14);
EXPECT(counters.err_calls == 0);
/* check ooseq queue: unchanged */
EXPECT_OOSEQ(tcp_oos_count(pcb) == 1);
EXPECT_OOSEQ(tcp_oos_seg_seqno(pcb, 0) == 15);
EXPECT_OOSEQ(tcp_oos_seg_tcplen(pcb, 0) == 1);
/* pass the segment to tcp_input */
test_tcp_input(pinseqFIN, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 1);
EXPECT(counters.recv_calls == 2);
EXPECT(counters.recved_bytes == data_len);
EXPECT(counters.err_calls == 0);
EXPECT(pcb->ooseq == NULL);
}
/* 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
static char data_full_wnd[TCP_WND + TCP_MSS];
/** create multiple segments and pass them to tcp_input with the first segment missing
* to simulate overruning the rxwin with ooseq queueing enabled */
START_TEST(test_tcp_recv_ooseq_overrun_rxwin)
{
#if !TCP_OOSEQ_MAX_BYTES && !TCP_OOSEQ_MAX_PBUFS
int i, k;
struct test_tcp_counters counters;
struct tcp_pcb* pcb;
struct pbuf *pinseq, *p_ovr;
struct netif netif;
int datalen = 0;
int datalen2;
for(i = 0; i < (int)sizeof(data_full_wnd); i++) {
data_full_wnd[i] = (char)i;
}
/* initialize local vars */
test_tcp_init_netif(&netif, NULL, &test_local_ip, &test_netmask);
/* initialize counter struct */
memset(&counters, 0, sizeof(counters));
counters.expected_data_len = TCP_WND;
counters.expected_data = data_full_wnd;
/* 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);
pcb->rcv_nxt = 0x8000;
/* create segments */
/* pinseq is sent as last segment! */
pinseq = tcp_create_rx_segment(pcb, &data_full_wnd[0], TCP_MSS, 0, 0, TCP_ACK);
for(i = TCP_MSS, k = 0; i < TCP_WND; i += TCP_MSS, k++) {
int count, expected_datalen;
struct pbuf *p = tcp_create_rx_segment(pcb, &data_full_wnd[TCP_MSS*(k+1)],
TCP_MSS, TCP_MSS*(k+1), 0, TCP_ACK);
EXPECT_RET(p != 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 == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
count = tcp_oos_count(pcb);
EXPECT_OOSEQ(count == k+1);
datalen = tcp_oos_tcplen(pcb);
if (i + TCP_MSS < TCP_WND) {
expected_datalen = (k+1)*TCP_MSS;
} else {
expected_datalen = TCP_WND - TCP_MSS;
}
if (datalen != expected_datalen) {
EXPECT_OOSEQ(datalen == expected_datalen);
}
}
/* pass in one more segment, cleary overrunning the rxwin */
p_ovr = tcp_create_rx_segment(pcb, &data_full_wnd[TCP_MSS*(k+1)], TCP_MSS, TCP_MSS*(k+1), 0, TCP_ACK);
EXPECT_RET(p_ovr != NULL);
/* pass the segment to tcp_input */
test_tcp_input(p_ovr, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
EXPECT_OOSEQ(tcp_oos_count(pcb) == k);
datalen2 = tcp_oos_tcplen(pcb);
EXPECT_OOSEQ(datalen == datalen2);
/* now pass inseq */
test_tcp_input(pinseq, &netif);
EXPECT(pcb->ooseq == NULL);
/* 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);
#endif /* !TCP_OOSEQ_MAX_BYTES && !TCP_OOSEQ_MAX_PBUFS */
LWIP_UNUSED_ARG(_i);
}
END_TEST
/** similar to above test, except seqno starts near the max rxwin */
START_TEST(test_tcp_recv_ooseq_overrun_rxwin_edge)
{
#if !TCP_OOSEQ_MAX_BYTES && !TCP_OOSEQ_MAX_PBUFS
int i, k;
struct test_tcp_counters counters;
struct tcp_pcb* pcb;
struct pbuf *pinseq, *p_ovr;
struct netif netif;
int datalen = 0;
int datalen2;
for(i = 0; i < (int)sizeof(data_full_wnd); i++) {
data_full_wnd[i] = (char)i;
}
/* initialize local vars */
test_tcp_init_netif(&netif, NULL, &test_local_ip, &test_netmask);
/* initialize counter struct */
memset(&counters, 0, sizeof(counters));
counters.expected_data_len = TCP_WND;
counters.expected_data = data_full_wnd;
/* 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);
pcb->rcv_nxt = 0xffffffff - (TCP_WND / 2);
/* create segments */
/* pinseq is sent as last segment! */
pinseq = tcp_create_rx_segment(pcb, &data_full_wnd[0], TCP_MSS, 0, 0, TCP_ACK);
for(i = TCP_MSS, k = 0; i < TCP_WND; i += TCP_MSS, k++) {
int count, expected_datalen;
struct pbuf *p = tcp_create_rx_segment(pcb, &data_full_wnd[TCP_MSS*(k+1)],
TCP_MSS, TCP_MSS*(k+1), 0, TCP_ACK);
EXPECT_RET(p != 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 == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
count = tcp_oos_count(pcb);
EXPECT_OOSEQ(count == k+1);
datalen = tcp_oos_tcplen(pcb);
if (i + TCP_MSS < TCP_WND) {
expected_datalen = (k+1)*TCP_MSS;
} else {
expected_datalen = TCP_WND - TCP_MSS;
}
if (datalen != expected_datalen) {
EXPECT_OOSEQ(datalen == expected_datalen);
}
}
/* pass in one more segment, cleary overrunning the rxwin */
p_ovr = tcp_create_rx_segment(pcb, &data_full_wnd[TCP_MSS*(k+1)], TCP_MSS, TCP_MSS*(k+1), 0, TCP_ACK);
EXPECT_RET(p_ovr != NULL);
/* pass the segment to tcp_input */
test_tcp_input(p_ovr, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
EXPECT_OOSEQ(tcp_oos_count(pcb) == k);
datalen2 = tcp_oos_tcplen(pcb);
EXPECT_OOSEQ(datalen == datalen2);
/* now pass inseq */
test_tcp_input(pinseq, &netif);
EXPECT(pcb->ooseq == NULL);
/* 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);
#endif /* !TCP_OOSEQ_MAX_BYTES && !TCP_OOSEQ_MAX_PBUFS */
LWIP_UNUSED_ARG(_i);
}
END_TEST
START_TEST(test_tcp_recv_ooseq_max_bytes)
{
#if TCP_OOSEQ_MAX_BYTES && (TCP_OOSEQ_MAX_BYTES < (TCP_WND + 1)) && (PBUF_POOL_BUFSIZE >= (TCP_MSS + PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN))
int i, k;
struct test_tcp_counters counters;
struct tcp_pcb* pcb;
struct pbuf *p_ovr;
struct netif netif;
int datalen = 0;
int datalen2;
for(i = 0; i < sizeof(data_full_wnd); i++) {
data_full_wnd[i] = (char)i;
}
/* initialize local vars */
test_tcp_init_netif(&netif, NULL, &test_local_ip, &test_netmask);
/* initialize counter struct */
memset(&counters, 0, sizeof(counters));
counters.expected_data_len = TCP_WND;
counters.expected_data = data_full_wnd;
/* 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);
pcb->rcv_nxt = 0x8000;
/* don't 'recv' the first segment (1 byte) so that all other segments will be ooseq */
/* create segments and 'recv' them */
for(k = 1, i = 1; k < TCP_OOSEQ_MAX_BYTES; k += TCP_MSS, i++) {
int count;
struct pbuf *p = tcp_create_rx_segment(pcb, &data_full_wnd[k],
TCP_MSS, k, 0, TCP_ACK);
EXPECT_RET(p != NULL);
EXPECT_RET(p->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 == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
count = tcp_oos_pbuf_count(pcb);
EXPECT_OOSEQ(count == i);
datalen = tcp_oos_tcplen(pcb);
EXPECT_OOSEQ(datalen == (i * TCP_MSS));
}
/* pass in one more segment, overrunning the limit */
p_ovr = tcp_create_rx_segment(pcb, &data_full_wnd[k+1], 1, k+1, 0, TCP_ACK);
EXPECT_RET(p_ovr != NULL);
/* pass the segment to tcp_input */
test_tcp_input(p_ovr, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue (ensure the new segment was not accepted) */
EXPECT_OOSEQ(tcp_oos_count(pcb) == (i-1));
datalen2 = tcp_oos_tcplen(pcb);
EXPECT_OOSEQ(datalen2 == ((i-1) * TCP_MSS));
/* 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);
#endif /* TCP_OOSEQ_MAX_BYTES && (TCP_OOSEQ_MAX_BYTES < (TCP_WND + 1)) && (PBUF_POOL_BUFSIZE >= (TCP_MSS + PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN)) */
LWIP_UNUSED_ARG(_i);
}
END_TEST
START_TEST(test_tcp_recv_ooseq_max_pbufs)
{
#if TCP_OOSEQ_MAX_PBUFS && (TCP_OOSEQ_MAX_PBUFS < ((TCP_WND / TCP_MSS) + 1)) && (PBUF_POOL_BUFSIZE >= (TCP_MSS + PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN))
int i;
struct test_tcp_counters counters;
struct tcp_pcb* pcb;
struct pbuf *p_ovr;
struct netif netif;
int datalen = 0;
int datalen2;
for(i = 0; i < sizeof(data_full_wnd); i++) {
data_full_wnd[i] = (char)i;
}
/* initialize local vars */
test_tcp_init_netif(&netif, NULL, &test_local_ip, &test_netmask);
/* initialize counter struct */
memset(&counters, 0, sizeof(counters));
counters.expected_data_len = TCP_WND;
counters.expected_data = data_full_wnd;
/* create and initialize the pcb */
pcb = test_tcp_new_counters_pcb(&counters);
EXPECT_RET(pcb != NULL);
tcp_set_state(pcb, ESTABLISHED, &local_ip, &remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
pcb->rcv_nxt = 0x8000;
/* don't 'recv' the first segment (1 byte) so that all other segments will be ooseq */
/* create segments and 'recv' them */
for(i = 1; i <= TCP_OOSEQ_MAX_PBUFS; i++) {
int count;
struct pbuf *p = tcp_create_rx_segment(pcb, &data_full_wnd[i],
1, i, 0, TCP_ACK);
EXPECT_RET(p != NULL);
EXPECT_RET(p->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 == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue */
count = tcp_oos_pbuf_count(pcb);
EXPECT_OOSEQ(count == i);
datalen = tcp_oos_tcplen(pcb);
EXPECT_OOSEQ(datalen == i);
}
/* pass in one more segment, overrunning the limit */
p_ovr = tcp_create_rx_segment(pcb, &data_full_wnd[i+1], 1, i+1, 0, TCP_ACK);
EXPECT_RET(p_ovr != NULL);
/* pass the segment to tcp_input */
test_tcp_input(p_ovr, &netif);
/* check if counters are as expected */
EXPECT(counters.close_calls == 0);
EXPECT(counters.recv_calls == 0);
EXPECT(counters.recved_bytes == 0);
EXPECT(counters.err_calls == 0);
/* check ooseq queue (ensure the new segment was not accepted) */
EXPECT_OOSEQ(tcp_oos_count(pcb) == (i-1));
datalen2 = tcp_oos_tcplen(pcb);
EXPECT_OOSEQ(datalen2 == (i-1));
/* 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);
#endif /* TCP_OOSEQ_MAX_PBUFS && (TCP_OOSEQ_MAX_BYTES < (TCP_WND + 1)) && (PBUF_POOL_BUFSIZE >= (TCP_MSS + PBUF_LINK_ENCAPSULATION_HLEN + PBUF_LINK_HLEN + PBUF_IP_HLEN + PBUF_TRANSPORT_HLEN)) */
LWIP_UNUSED_ARG(_i);
}
END_TEST
static void
check_rx_counters(struct tcp_pcb *pcb, struct test_tcp_counters *counters, u32_t exp_close_calls, u32_t exp_rx_calls,
u32_t exp_rx_bytes, u32_t exp_err_calls, int exp_oos_count, int exp_oos_len)
{
int oos_len;
EXPECT(counters->close_calls == exp_close_calls);
EXPECT(counters->recv_calls == exp_rx_calls);
EXPECT(counters->recved_bytes == exp_rx_bytes);
EXPECT(counters->err_calls == exp_err_calls);
/* check that pbuf is queued in ooseq */
EXPECT_OOSEQ(tcp_oos_count(pcb) == exp_oos_count);
oos_len = tcp_oos_tcplen(pcb);
EXPECT_OOSEQ(exp_oos_len == oos_len);
}
/* this test uses 4 packets:
* - data (len=TCP_MSS)
* - FIN
* - data after FIN (len=1) (invalid)
* - 2nd FIN (invalid)
*
* the parameter 'delay_packet' is a bitmask that choses which on these packets is ooseq
*/
static void test_tcp_recv_ooseq_double_FINs(int delay_packet)
{
int i, k;
struct test_tcp_counters counters;
struct tcp_pcb* pcb;
struct pbuf *p_normal_fin, *p_data_after_fin, *p, *p_2nd_fin_ooseq;
struct netif netif;
u32_t exp_rx_calls = 0, exp_rx_bytes = 0, exp_close_calls = 0, exp_oos_pbufs = 0, exp_oos_tcplen = 0;
int first_dropped = 0xff;
for(i = 0; i < (int)sizeof(data_full_wnd); i++) {
data_full_wnd[i] = (char)i;
}
/* initialize local vars */
test_tcp_init_netif(&netif, NULL, &test_local_ip, &test_netmask);
/* initialize counter struct */
memset(&counters, 0, sizeof(counters));
counters.expected_data_len = TCP_WND;
counters.expected_data = data_full_wnd;
/* 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);
pcb->rcv_nxt = 0x8000;
/* create segments */
p = tcp_create_rx_segment(pcb, &data_full_wnd[0], TCP_MSS, 0, 0, TCP_ACK);
p_normal_fin = tcp_create_rx_segment(pcb, NULL, 0, TCP_MSS, 0, TCP_ACK|TCP_FIN);
k = 1;
p_data_after_fin = tcp_create_rx_segment(pcb, &data_full_wnd[TCP_MSS+1], k, TCP_MSS+1, 0, TCP_ACK);
p_2nd_fin_ooseq = tcp_create_rx_segment(pcb, NULL, 0, TCP_MSS+1+k, 0, TCP_ACK|TCP_FIN);
if(delay_packet & 1) {
/* drop normal data */
first_dropped = 1;
} else {
/* send normal data */
test_tcp_input(p, &netif);
exp_rx_calls++;
exp_rx_bytes += TCP_MSS;
}
/* check if counters are as expected */
check_rx_counters(pcb, &counters, exp_close_calls, exp_rx_calls, exp_rx_bytes, 0, exp_oos_pbufs, exp_oos_tcplen);
if(delay_packet & 2) {
/* drop FIN */
if(first_dropped > 2) {
first_dropped = 2;
}
} else {
/* send FIN */
test_tcp_input(p_normal_fin, &netif);
if (first_dropped < 2) {
/* already dropped packets, this one is ooseq */
exp_oos_pbufs++;
exp_oos_tcplen++;
} else {
/* inseq */
exp_close_calls++;
}
}
/* check if counters are as expected */
check_rx_counters(pcb, &counters, exp_close_calls, exp_rx_calls, exp_rx_bytes, 0, exp_oos_pbufs, exp_oos_tcplen);
if(delay_packet & 4) {
/* drop data-after-FIN */
if(first_dropped > 3) {
first_dropped = 3;
}
} else {
/* send data-after-FIN */
test_tcp_input(p_data_after_fin, &netif);
if (first_dropped < 3) {
/* already dropped packets, this one is ooseq */
if (delay_packet & 2) {
/* correct FIN was ooseq */
exp_oos_pbufs++;
exp_oos_tcplen += k;
}
} else {
/* inseq: no change */
}
}
/* check if counters are as expected */
check_rx_counters(pcb, &counters, exp_close_calls, exp_rx_calls, exp_rx_bytes, 0, exp_oos_pbufs, exp_oos_tcplen);
if(delay_packet & 8) {
/* drop 2nd-FIN */
if(first_dropped > 4) {
first_dropped = 4;
}
} else {
/* send 2nd-FIN */
test_tcp_input(p_2nd_fin_ooseq, &netif);
if (first_dropped < 3) {
/* already dropped packets, this one is ooseq */
if (delay_packet & 2) {
/* correct FIN was ooseq */
exp_oos_pbufs++;
exp_oos_tcplen++;
}
} else {
/* inseq: no change */
}
}
/* check if counters are as expected */
check_rx_counters(pcb, &counters, exp_close_calls, exp_rx_calls, exp_rx_bytes, 0, exp_oos_pbufs, exp_oos_tcplen);
if(delay_packet & 1) {
/* dropped normal data before */
test_tcp_input(p, &netif);
exp_rx_calls++;
exp_rx_bytes += TCP_MSS;
if((delay_packet & 2) == 0) {
/* normal FIN was NOT delayed */
exp_close_calls++;
exp_oos_pbufs = exp_oos_tcplen = 0;
}
}
/* check if counters are as expected */
check_rx_counters(pcb, &counters, exp_close_calls, exp_rx_calls, exp_rx_bytes, 0, exp_oos_pbufs, exp_oos_tcplen);
if(delay_packet & 2) {
/* dropped normal FIN before */
test_tcp_input(p_normal_fin, &netif);
exp_close_calls++;
exp_oos_pbufs = exp_oos_tcplen = 0;
}
/* check if counters are as expected */
check_rx_counters(pcb, &counters, exp_close_calls, exp_rx_calls, exp_rx_bytes, 0, exp_oos_pbufs, exp_oos_tcplen);
if(delay_packet & 4) {
/* dropped data-after-FIN before */
test_tcp_input(p_data_after_fin, &netif);
}
/* check if counters are as expected */
check_rx_counters(pcb, &counters, exp_close_calls, exp_rx_calls, exp_rx_bytes, 0, exp_oos_pbufs, exp_oos_tcplen);
if(delay_packet & 8) {
/* dropped 2nd-FIN before */
test_tcp_input(p_2nd_fin_ooseq, &netif);
}
/* check if counters are as expected */
check_rx_counters(pcb, &counters, exp_close_calls, exp_rx_calls, exp_rx_bytes, 0, exp_oos_pbufs, exp_oos_tcplen);
/* check that ooseq data has been dumped */
EXPECT(pcb->ooseq == NULL);
/* 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);
}
/** create multiple segments and pass them to tcp_input with the first segment missing
* to simulate overruning the rxwin with ooseq queueing enabled */
#define FIN_TEST(name, num) \
START_TEST(name) \
{ \
LWIP_UNUSED_ARG(_i); \
test_tcp_recv_ooseq_double_FINs(num); \
} \
END_TEST
FIN_TEST(test_tcp_recv_ooseq_double_FIN_0, 0)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_1, 1)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_2, 2)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_3, 3)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_4, 4)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_5, 5)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_6, 6)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_7, 7)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_8, 8)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_9, 9)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_10, 10)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_11, 11)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_12, 12)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_13, 13)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_14, 14)
FIN_TEST(test_tcp_recv_ooseq_double_FIN_15, 15)
/** Create the suite including all tests for this module */
Suite *
tcp_oos_suite(void)
{
testfunc tests[] = {
TESTFUNC(test_tcp_recv_ooseq_FIN_OOSEQ),
TESTFUNC(test_tcp_recv_ooseq_FIN_INSEQ),
TESTFUNC(test_tcp_recv_ooseq_overrun_rxwin),
TESTFUNC(test_tcp_recv_ooseq_overrun_rxwin_edge),
TESTFUNC(test_tcp_recv_ooseq_max_bytes),
TESTFUNC(test_tcp_recv_ooseq_max_pbufs),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_0),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_1),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_2),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_3),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_4),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_5),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_6),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_7),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_8),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_9),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_10),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_11),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_12),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_13),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_14),
TESTFUNC(test_tcp_recv_ooseq_double_FIN_15)
};
return create_suite("TCP_OOS", tests, sizeof(tests)/sizeof(testfunc), tcp_oos_setup, tcp_oos_teardown);
}
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