[457] | 1 | #include "test_tcp.h"
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| 2 |
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| 3 | #include "lwip/priv/tcp_priv.h"
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| 4 | #include "lwip/stats.h"
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| 5 | #include "tcp_helper.h"
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| 6 | #include "lwip/inet_chksum.h"
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| 7 |
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| 8 | #ifdef _MSC_VER
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| 9 | #pragma warning(disable: 4307) /* we explicitly wrap around TCP seqnos */
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| 10 | #endif
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| 11 |
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| 12 | #if !LWIP_STATS || !TCP_STATS || !MEMP_STATS
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| 13 | #error "This tests needs TCP- and MEMP-statistics enabled"
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| 14 | #endif
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| 15 | #if TCP_SND_BUF <= TCP_WND
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| 16 | #error "This tests needs TCP_SND_BUF to be > TCP_WND"
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| 17 | #endif
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| 18 |
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| 19 | /* used with check_seqnos() */
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| 20 | #define SEQNO1 (0xFFFFFF00 - TCP_MSS)
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| 21 | #define ISS 6510
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| 22 | static u32_t seqnos[] = {
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| 23 | SEQNO1,
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| 24 | SEQNO1 + (1 * TCP_MSS),
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| 25 | SEQNO1 + (2 * TCP_MSS),
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| 26 | SEQNO1 + (3 * TCP_MSS),
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| 27 | SEQNO1 + (4 * TCP_MSS),
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| 28 | SEQNO1 + (5 * TCP_MSS) };
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| 29 |
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| 30 | static u8_t test_tcp_timer;
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| 31 |
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| 32 | /* our own version of tcp_tmr so we can reset fast/slow timer state */
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| 33 | static void
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| 34 | test_tcp_tmr(void)
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| 35 | {
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| 36 | tcp_fasttmr();
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| 37 | if (++test_tcp_timer & 1) {
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| 38 | tcp_slowtmr();
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| 39 | }
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| 40 | }
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| 41 |
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| 42 | /* Setups/teardown functions */
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| 43 | static struct netif *old_netif_list;
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| 44 | static struct netif *old_netif_default;
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| 45 |
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| 46 | static void
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| 47 | tcp_setup(void)
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| 48 | {
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| 49 | struct tcp_pcb dummy_pcb; /* we need this for tcp_next_iss() only */
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| 50 |
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| 51 | old_netif_list = netif_list;
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| 52 | old_netif_default = netif_default;
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| 53 | netif_list = NULL;
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| 54 | netif_default = NULL;
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| 55 | /* reset iss to default (6510) */
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| 56 | tcp_ticks = 0;
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| 57 | tcp_ticks = 0 - (tcp_next_iss(&dummy_pcb) - 6510);
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| 58 | tcp_next_iss(&dummy_pcb);
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| 59 | tcp_ticks = 0;
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| 60 |
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| 61 | test_tcp_timer = 0;
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| 62 | tcp_remove_all();
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| 63 | lwip_check_ensure_no_alloc(SKIP_POOL(MEMP_SYS_TIMEOUT));
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| 64 | }
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| 65 |
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| 66 | static void
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| 67 | tcp_teardown(void)
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| 68 | {
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| 69 | netif_list = NULL;
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| 70 | netif_default = NULL;
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| 71 | tcp_remove_all();
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| 72 | /* restore netif_list for next tests (e.g. loopif) */
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| 73 | netif_list = old_netif_list;
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| 74 | netif_default = old_netif_default;
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| 75 | lwip_check_ensure_no_alloc(SKIP_POOL(MEMP_SYS_TIMEOUT));
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| 76 | }
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| 77 |
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| 78 |
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| 79 | /* Test functions */
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| 80 |
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| 81 | /** Call tcp_new() and tcp_abort() and test memp stats */
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| 82 | START_TEST(test_tcp_new_abort)
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| 83 | {
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| 84 | struct tcp_pcb* pcb;
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| 85 | LWIP_UNUSED_ARG(_i);
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| 86 |
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| 87 | fail_unless(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
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| 88 |
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| 89 | pcb = tcp_new();
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| 90 | fail_unless(pcb != NULL);
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| 91 | if (pcb != NULL) {
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| 92 | fail_unless(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
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| 93 | tcp_abort(pcb);
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| 94 | fail_unless(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
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| 95 | }
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| 96 | }
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| 97 | END_TEST
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| 98 |
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| 99 | /** Call tcp_new() and tcp_abort() and test memp stats */
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| 100 | START_TEST(test_tcp_listen_passive_open)
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| 101 | {
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| 102 | struct tcp_pcb *pcb, *pcbl;
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| 103 | struct tcp_pcb_listen *lpcb;
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| 104 | struct netif netif;
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| 105 | struct test_tcp_txcounters txcounters;
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| 106 | struct test_tcp_counters counters;
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| 107 | struct pbuf *p;
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| 108 | ip_addr_t src_addr;
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| 109 | err_t err;
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| 110 | LWIP_UNUSED_ARG(_i);
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| 111 |
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| 112 | fail_unless(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
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| 113 |
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| 114 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
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| 115 | /* initialize counter struct */
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| 116 | memset(&counters, 0, sizeof(counters));
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| 117 |
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| 118 | pcb = tcp_new();
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| 119 | EXPECT_RET(pcb != NULL);
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| 120 | err = tcp_bind(pcb, &netif.ip_addr, 1234);
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| 121 | EXPECT(err == ERR_OK);
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| 122 | pcbl = tcp_listen(pcb);
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| 123 | EXPECT_RET(pcbl != NULL);
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| 124 | EXPECT_RET(pcbl != pcb);
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| 125 | lpcb = (struct tcp_pcb_listen *)pcbl;
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| 126 |
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| 127 | ip_addr_set_ip4_u32_val(src_addr, lwip_htonl(lwip_ntohl(ip_addr_get_ip4_u32(&lpcb->local_ip)) + 1));
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| 128 |
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| 129 | /* check correct syn packet */
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| 130 | p = tcp_create_segment(&src_addr, &lpcb->local_ip, 12345,
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| 131 | lpcb->local_port, NULL, 0, 12345, 54321, TCP_SYN);
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| 132 | EXPECT(p != NULL);
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| 133 | if (p != NULL) {
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| 134 | /* pass the segment to tcp_input */
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| 135 | test_tcp_input(p, &netif);
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| 136 | /* check if counters are as expected */
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| 137 | EXPECT(txcounters.num_tx_calls == 1);
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| 138 | }
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| 139 |
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| 140 | /* check syn packet with short length */
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| 141 | p = tcp_create_segment(&src_addr, &lpcb->local_ip, 12345,
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| 142 | lpcb->local_port, NULL, 0, 12345, 54321, TCP_SYN);
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| 143 | EXPECT(p != NULL);
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| 144 | EXPECT(p->next == NULL);
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| 145 | if ((p != NULL) && (p->next == NULL)) {
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| 146 | p->len -= 2;
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| 147 | p->tot_len -= 2;
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| 148 | /* pass the segment to tcp_input */
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| 149 | test_tcp_input(p, &netif);
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| 150 | /* check if counters are as expected */
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| 151 | EXPECT(txcounters.num_tx_calls == 1);
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| 152 | }
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| 153 |
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| 154 | tcp_close(pcbl);
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| 155 | }
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| 156 | END_TEST
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| 157 |
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| 158 | /** Create an ESTABLISHED pcb and check if receive callback is called */
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| 159 | START_TEST(test_tcp_recv_inseq)
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| 160 | {
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| 161 | struct test_tcp_counters counters;
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| 162 | struct tcp_pcb* pcb;
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| 163 | struct pbuf* p;
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| 164 | char data[] = {1, 2, 3, 4};
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| 165 | u16_t data_len;
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| 166 | struct netif netif;
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| 167 | struct test_tcp_txcounters txcounters;
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| 168 | LWIP_UNUSED_ARG(_i);
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| 169 |
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| 170 | /* initialize local vars */
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| 171 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
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| 172 | data_len = sizeof(data);
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| 173 | /* initialize counter struct */
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| 174 | memset(&counters, 0, sizeof(counters));
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| 175 | counters.expected_data_len = data_len;
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| 176 | counters.expected_data = data;
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| 177 |
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| 178 | /* create and initialize the pcb */
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| 179 | pcb = test_tcp_new_counters_pcb(&counters);
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| 180 | EXPECT_RET(pcb != NULL);
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| 181 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
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| 182 |
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| 183 | /* create a segment */
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| 184 | p = tcp_create_rx_segment(pcb, counters.expected_data, data_len, 0, 0, 0);
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| 185 | EXPECT(p != NULL);
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| 186 | if (p != NULL) {
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| 187 | /* pass the segment to tcp_input */
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| 188 | test_tcp_input(p, &netif);
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| 189 | /* check if counters are as expected */
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| 190 | EXPECT(counters.close_calls == 0);
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| 191 | EXPECT(counters.recv_calls == 1);
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| 192 | EXPECT(counters.recved_bytes == data_len);
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| 193 | EXPECT(counters.err_calls == 0);
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| 194 | }
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| 195 |
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| 196 | /* make sure the pcb is freed */
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| 197 | EXPECT(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
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| 198 | tcp_abort(pcb);
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| 199 | EXPECT(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
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| 200 | }
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| 201 | END_TEST
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| 202 |
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| 203 | /** Create an ESTABLISHED pcb and check if receive callback is called if a segment
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| 204 | * overlapping rcv_nxt is received */
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| 205 | START_TEST(test_tcp_recv_inseq_trim)
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| 206 | {
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| 207 | struct test_tcp_counters counters;
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| 208 | struct tcp_pcb* pcb;
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| 209 | struct pbuf* p;
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| 210 | char data[PBUF_POOL_BUFSIZE*2];
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| 211 | u16_t data_len;
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| 212 | struct netif netif;
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| 213 | struct test_tcp_txcounters txcounters;
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| 214 | const u32_t new_data_len = 40;
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| 215 | LWIP_UNUSED_ARG(_i);
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| 216 |
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| 217 | /* initialize local vars */
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| 218 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
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| 219 | data_len = sizeof(data);
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| 220 | memset(data, 0, sizeof(data));
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| 221 | /* initialize counter struct */
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| 222 | memset(&counters, 0, sizeof(counters));
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| 223 | counters.expected_data_len = data_len;
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| 224 | counters.expected_data = data;
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| 225 |
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| 226 | /* create and initialize the pcb */
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| 227 | pcb = test_tcp_new_counters_pcb(&counters);
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| 228 | EXPECT_RET(pcb != NULL);
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| 229 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
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| 230 |
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| 231 | /* create a segment (with an overlapping/old seqno so that the new data begins in the 2nd pbuf) */
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| 232 | p = tcp_create_rx_segment(pcb, counters.expected_data, data_len, (u32_t)(0-(data_len-new_data_len)), 0, 0);
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| 233 | EXPECT(p != NULL);
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| 234 | if (p != NULL) {
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| 235 | EXPECT(p->next != NULL);
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| 236 | if (p->next != NULL) {
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| 237 | EXPECT(p->next->next != NULL);
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| 238 | }
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| 239 | }
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| 240 | if ((p != NULL) && (p->next != NULL) && (p->next->next != NULL)) {
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| 241 | /* pass the segment to tcp_input */
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| 242 | test_tcp_input(p, &netif);
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| 243 | /* check if counters are as expected */
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| 244 | EXPECT(counters.close_calls == 0);
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| 245 | EXPECT(counters.recv_calls == 1);
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| 246 | EXPECT(counters.recved_bytes == new_data_len);
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| 247 | EXPECT(counters.err_calls == 0);
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| 248 | }
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| 249 |
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| 250 | /* make sure the pcb is freed */
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| 251 | EXPECT(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
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| 252 | tcp_abort(pcb);
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| 253 | EXPECT(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
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| 254 | }
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| 255 | END_TEST
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| 256 |
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| 257 | static err_t test_tcp_recv_expect1byte(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err);
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| 258 |
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| 259 | static err_t
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| 260 | test_tcp_recv_expectclose(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err)
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| 261 | {
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| 262 | EXPECT_RETX(pcb != NULL, ERR_OK);
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| 263 | EXPECT_RETX(err == ERR_OK, ERR_OK);
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| 264 | LWIP_UNUSED_ARG(arg);
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| 265 |
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| 266 | if (p != NULL) {
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| 267 | fail();
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| 268 | } else {
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| 269 | /* correct: FIN received; close our end, too */
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| 270 | err_t err2 = tcp_close(pcb);
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| 271 | fail_unless(err2 == ERR_OK);
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| 272 | /* set back to some other rx function, just to not get here again */
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| 273 | tcp_recv(pcb, test_tcp_recv_expect1byte);
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| 274 | }
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| 275 | return ERR_OK;
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| 276 | }
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| 277 |
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| 278 | static err_t
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| 279 | test_tcp_recv_expect1byte(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err)
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| 280 | {
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| 281 | EXPECT_RETX(pcb != NULL, ERR_OK);
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| 282 | EXPECT_RETX(err == ERR_OK, ERR_OK);
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| 283 | LWIP_UNUSED_ARG(arg);
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| 284 |
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| 285 | if (p != NULL) {
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| 286 | if ((p->len == 1) && (p->tot_len == 1)) {
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| 287 | tcp_recv(pcb, test_tcp_recv_expectclose);
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| 288 | } else {
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| 289 | fail();
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| 290 | }
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| 291 | pbuf_free(p);
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| 292 | } else {
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| 293 | fail();
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| 294 | }
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| 295 | return ERR_OK;
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| 296 | }
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| 297 |
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| 298 | START_TEST(test_tcp_passive_close)
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| 299 | {
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| 300 | struct test_tcp_counters counters;
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| 301 | struct tcp_pcb* pcb;
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| 302 | struct pbuf* p;
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| 303 | char data = 0x0f;
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| 304 | struct netif netif;
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| 305 | struct test_tcp_txcounters txcounters;
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| 306 | LWIP_UNUSED_ARG(_i);
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| 307 |
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| 308 | /* initialize local vars */
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| 309 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
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| 310 |
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| 311 | /* initialize counter struct */
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| 312 | memset(&counters, 0, sizeof(counters));
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| 313 | counters.expected_data_len = 1;
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| 314 | counters.expected_data = &data;
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| 315 |
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| 316 | /* create and initialize the pcb */
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| 317 | pcb = test_tcp_new_counters_pcb(&counters);
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| 318 | EXPECT_RET(pcb != NULL);
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| 319 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
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| 320 |
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| 321 | /* create a segment without data */
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| 322 | p = tcp_create_rx_segment(pcb, &data, 1, 0, 0, TCP_FIN);
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| 323 | EXPECT(p != NULL);
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| 324 | if (p != NULL) {
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| 325 | tcp_recv(pcb, test_tcp_recv_expect1byte);
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| 326 | /* pass the segment to tcp_input */
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| 327 | test_tcp_input(p, &netif);
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| 328 | }
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| 329 | /* don't free the pcb here (part of the test!) */
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| 330 | }
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| 331 | END_TEST
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| 332 |
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| 333 | START_TEST(test_tcp_active_abort)
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| 334 | {
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| 335 | struct test_tcp_counters counters;
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| 336 | struct tcp_pcb* pcb;
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| 337 | char data = 0x0f;
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| 338 | struct netif netif;
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| 339 | struct test_tcp_txcounters txcounters;
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| 340 | LWIP_UNUSED_ARG(_i);
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| 341 |
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| 342 | memset(&txcounters, 0, sizeof(txcounters));
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| 343 |
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| 344 | /* initialize local vars */
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| 345 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
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| 346 |
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| 347 | /* initialize counter struct */
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| 348 | memset(&counters, 0, sizeof(counters));
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| 349 | counters.expected_data_len = 1;
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| 350 | counters.expected_data = &data;
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| 351 |
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| 352 | /* create and initialize the pcb */
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| 353 | pcb = test_tcp_new_counters_pcb(&counters);
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| 354 | EXPECT_RET(pcb != NULL);
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| 355 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
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| 356 |
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| 357 | /* abort the pcb */
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| 358 | EXPECT_RET(txcounters.num_tx_calls == 0);
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| 359 | txcounters.copy_tx_packets = 1;
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| 360 | tcp_abort(pcb);
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| 361 | txcounters.copy_tx_packets = 0;
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| 362 | EXPECT(txcounters.num_tx_calls == 1);
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| 363 | EXPECT(txcounters.num_tx_bytes == 40U);
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| 364 | EXPECT(txcounters.tx_packets != NULL);
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| 365 | if (txcounters.tx_packets != NULL) {
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| 366 | u16_t ret;
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| 367 | struct tcp_hdr tcphdr;
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| 368 | ret = pbuf_copy_partial(txcounters.tx_packets, &tcphdr, 20, 20);
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| 369 | EXPECT(ret == 20);
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| 370 | EXPECT(tcphdr.dest == PP_HTONS(TEST_REMOTE_PORT));
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| 371 | EXPECT(tcphdr.src == PP_HTONS(TEST_LOCAL_PORT));
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| 372 | pbuf_free(txcounters.tx_packets);
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| 373 | txcounters.tx_packets = NULL;
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| 374 | }
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| 375 |
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| 376 | /* don't free the pcb here (part of the test!) */
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| 377 | }
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| 378 | END_TEST
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| 379 |
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| 380 | /** Check that we handle malformed tcp headers, and discard the pbuf(s) */
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| 381 | START_TEST(test_tcp_malformed_header)
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| 382 | {
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| 383 | struct test_tcp_counters counters;
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| 384 | struct tcp_pcb* pcb;
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| 385 | struct pbuf* p;
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| 386 | char data[] = {1, 2, 3, 4};
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| 387 | u16_t data_len, chksum;
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| 388 | struct netif netif;
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| 389 | struct test_tcp_txcounters txcounters;
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| 390 | struct tcp_hdr *hdr;
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| 391 | LWIP_UNUSED_ARG(_i);
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| 392 |
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| 393 | /* initialize local vars */
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| 394 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
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| 395 | data_len = sizeof(data);
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| 396 | /* initialize counter struct */
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| 397 | memset(&counters, 0, sizeof(counters));
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| 398 | counters.expected_data_len = data_len;
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| 399 | counters.expected_data = data;
|
---|
| 400 |
|
---|
| 401 | /* create and initialize the pcb */
|
---|
| 402 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 403 | EXPECT_RET(pcb != NULL);
|
---|
| 404 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
|
---|
| 405 |
|
---|
| 406 | /* create a segment */
|
---|
| 407 | p = tcp_create_rx_segment(pcb, counters.expected_data, data_len, 0, 0, 0);
|
---|
| 408 |
|
---|
| 409 | pbuf_header(p, -(s16_t)sizeof(struct ip_hdr));
|
---|
| 410 |
|
---|
| 411 | hdr = (struct tcp_hdr *)p->payload;
|
---|
| 412 | TCPH_HDRLEN_FLAGS_SET(hdr, 15, 0x3d1);
|
---|
| 413 |
|
---|
| 414 | hdr->chksum = 0;
|
---|
| 415 |
|
---|
| 416 | chksum = ip_chksum_pseudo(p, IP_PROTO_TCP, p->tot_len,
|
---|
| 417 | &test_remote_ip, &test_local_ip);
|
---|
| 418 |
|
---|
| 419 | hdr->chksum = chksum;
|
---|
| 420 |
|
---|
| 421 | pbuf_header(p, sizeof(struct ip_hdr));
|
---|
| 422 |
|
---|
| 423 | EXPECT(p != NULL);
|
---|
| 424 | EXPECT(p->next == NULL);
|
---|
| 425 | if (p != NULL) {
|
---|
| 426 | /* pass the segment to tcp_input */
|
---|
| 427 | test_tcp_input(p, &netif);
|
---|
| 428 | /* check if counters are as expected */
|
---|
| 429 | EXPECT(counters.close_calls == 0);
|
---|
| 430 | EXPECT(counters.recv_calls == 0);
|
---|
| 431 | EXPECT(counters.recved_bytes == 0);
|
---|
| 432 | EXPECT(counters.err_calls == 0);
|
---|
| 433 | }
|
---|
| 434 |
|
---|
| 435 | /* make sure the pcb is freed */
|
---|
| 436 | EXPECT(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
|
---|
| 437 | tcp_abort(pcb);
|
---|
| 438 | EXPECT(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 439 | }
|
---|
| 440 | END_TEST
|
---|
| 441 |
|
---|
| 442 |
|
---|
| 443 | /** Provoke fast retransmission by duplicate ACKs and then recover by ACKing all sent data.
|
---|
| 444 | * At the end, send more data. */
|
---|
| 445 | START_TEST(test_tcp_fast_retx_recover)
|
---|
| 446 | {
|
---|
| 447 | struct netif netif;
|
---|
| 448 | struct test_tcp_txcounters txcounters;
|
---|
| 449 | struct test_tcp_counters counters;
|
---|
| 450 | struct tcp_pcb* pcb;
|
---|
| 451 | struct pbuf* p;
|
---|
| 452 | char data1[] = { 1, 2, 3, 4};
|
---|
| 453 | char data2[] = { 5, 6, 7, 8};
|
---|
| 454 | char data3[] = { 9, 10, 11, 12};
|
---|
| 455 | char data4[] = {13, 14, 15, 16};
|
---|
| 456 | char data5[] = {17, 18, 19, 20};
|
---|
| 457 | char data6[TCP_MSS] = {21, 22, 23, 24};
|
---|
| 458 | err_t err;
|
---|
| 459 | LWIP_UNUSED_ARG(_i);
|
---|
| 460 |
|
---|
| 461 | /* initialize local vars */
|
---|
| 462 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
|
---|
| 463 | memset(&counters, 0, sizeof(counters));
|
---|
| 464 |
|
---|
| 465 | /* create and initialize the pcb */
|
---|
| 466 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 467 | EXPECT_RET(pcb != NULL);
|
---|
| 468 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
|
---|
| 469 | pcb->mss = TCP_MSS;
|
---|
| 470 | /* disable initial congestion window (we don't send a SYN here...) */
|
---|
| 471 | pcb->cwnd = pcb->snd_wnd;
|
---|
| 472 |
|
---|
| 473 | /* send data1 */
|
---|
| 474 | err = tcp_write(pcb, data1, sizeof(data1), TCP_WRITE_FLAG_COPY);
|
---|
| 475 | EXPECT_RET(err == ERR_OK);
|
---|
| 476 | err = tcp_output(pcb);
|
---|
| 477 | EXPECT_RET(err == ERR_OK);
|
---|
| 478 | EXPECT_RET(txcounters.num_tx_calls == 1);
|
---|
| 479 | EXPECT_RET(txcounters.num_tx_bytes == sizeof(data1) + sizeof(struct tcp_hdr) + sizeof(struct ip_hdr));
|
---|
| 480 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 481 | /* "recv" ACK for data1 */
|
---|
| 482 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 4, TCP_ACK);
|
---|
| 483 | EXPECT_RET(p != NULL);
|
---|
| 484 | test_tcp_input(p, &netif);
|
---|
| 485 | EXPECT_RET(txcounters.num_tx_calls == 0);
|
---|
| 486 | EXPECT_RET(pcb->unacked == NULL);
|
---|
| 487 | /* send data2 */
|
---|
| 488 | err = tcp_write(pcb, data2, sizeof(data2), TCP_WRITE_FLAG_COPY);
|
---|
| 489 | EXPECT_RET(err == ERR_OK);
|
---|
| 490 | err = tcp_output(pcb);
|
---|
| 491 | EXPECT_RET(err == ERR_OK);
|
---|
| 492 | EXPECT_RET(txcounters.num_tx_calls == 1);
|
---|
| 493 | EXPECT_RET(txcounters.num_tx_bytes == sizeof(data2) + sizeof(struct tcp_hdr) + sizeof(struct ip_hdr));
|
---|
| 494 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 495 | /* duplicate ACK for data1 (data2 is lost) */
|
---|
| 496 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 0, TCP_ACK);
|
---|
| 497 | EXPECT_RET(p != NULL);
|
---|
| 498 | test_tcp_input(p, &netif);
|
---|
| 499 | EXPECT_RET(txcounters.num_tx_calls == 0);
|
---|
| 500 | EXPECT_RET(pcb->dupacks == 1);
|
---|
| 501 | /* send data3 */
|
---|
| 502 | err = tcp_write(pcb, data3, sizeof(data3), TCP_WRITE_FLAG_COPY);
|
---|
| 503 | EXPECT_RET(err == ERR_OK);
|
---|
| 504 | err = tcp_output(pcb);
|
---|
| 505 | EXPECT_RET(err == ERR_OK);
|
---|
| 506 | /* nagle enabled, no tx calls */
|
---|
| 507 | EXPECT_RET(txcounters.num_tx_calls == 0);
|
---|
| 508 | EXPECT_RET(txcounters.num_tx_bytes == 0);
|
---|
| 509 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 510 | /* 2nd duplicate ACK for data1 (data2 and data3 are lost) */
|
---|
| 511 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 0, TCP_ACK);
|
---|
| 512 | EXPECT_RET(p != NULL);
|
---|
| 513 | test_tcp_input(p, &netif);
|
---|
| 514 | EXPECT_RET(txcounters.num_tx_calls == 0);
|
---|
| 515 | EXPECT_RET(pcb->dupacks == 2);
|
---|
| 516 | /* queue data4, don't send it (unsent-oversize is != 0) */
|
---|
| 517 | err = tcp_write(pcb, data4, sizeof(data4), TCP_WRITE_FLAG_COPY);
|
---|
| 518 | EXPECT_RET(err == ERR_OK);
|
---|
| 519 | /* 3nd duplicate ACK for data1 (data2 and data3 are lost) -> fast retransmission */
|
---|
| 520 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 0, TCP_ACK);
|
---|
| 521 | EXPECT_RET(p != NULL);
|
---|
| 522 | test_tcp_input(p, &netif);
|
---|
| 523 | /*EXPECT_RET(txcounters.num_tx_calls == 1);*/
|
---|
| 524 | EXPECT_RET(pcb->dupacks == 3);
|
---|
| 525 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 526 | /* @todo: check expected data?*/
|
---|
| 527 |
|
---|
| 528 | /* send data5, not output yet */
|
---|
| 529 | err = tcp_write(pcb, data5, sizeof(data5), TCP_WRITE_FLAG_COPY);
|
---|
| 530 | EXPECT_RET(err == ERR_OK);
|
---|
| 531 | /*err = tcp_output(pcb);
|
---|
| 532 | EXPECT_RET(err == ERR_OK);*/
|
---|
| 533 | EXPECT_RET(txcounters.num_tx_calls == 0);
|
---|
| 534 | EXPECT_RET(txcounters.num_tx_bytes == 0);
|
---|
| 535 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 536 | {
|
---|
| 537 | int i = 0;
|
---|
| 538 | do
|
---|
| 539 | {
|
---|
| 540 | err = tcp_write(pcb, data6, TCP_MSS, TCP_WRITE_FLAG_COPY);
|
---|
| 541 | i++;
|
---|
| 542 | }while(err == ERR_OK);
|
---|
| 543 | EXPECT_RET(err != ERR_OK);
|
---|
| 544 | }
|
---|
| 545 | err = tcp_output(pcb);
|
---|
| 546 | EXPECT_RET(err == ERR_OK);
|
---|
| 547 | /*EXPECT_RET(txcounters.num_tx_calls == 0);
|
---|
| 548 | EXPECT_RET(txcounters.num_tx_bytes == 0);*/
|
---|
| 549 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 550 |
|
---|
| 551 | /* send even more data */
|
---|
| 552 | err = tcp_write(pcb, data5, sizeof(data5), TCP_WRITE_FLAG_COPY);
|
---|
| 553 | EXPECT_RET(err == ERR_OK);
|
---|
| 554 | err = tcp_output(pcb);
|
---|
| 555 | EXPECT_RET(err == ERR_OK);
|
---|
| 556 | /* ...and even more data */
|
---|
| 557 | err = tcp_write(pcb, data5, sizeof(data5), TCP_WRITE_FLAG_COPY);
|
---|
| 558 | EXPECT_RET(err == ERR_OK);
|
---|
| 559 | err = tcp_output(pcb);
|
---|
| 560 | EXPECT_RET(err == ERR_OK);
|
---|
| 561 | /* ...and even more data */
|
---|
| 562 | err = tcp_write(pcb, data5, sizeof(data5), TCP_WRITE_FLAG_COPY);
|
---|
| 563 | EXPECT_RET(err == ERR_OK);
|
---|
| 564 | err = tcp_output(pcb);
|
---|
| 565 | EXPECT_RET(err == ERR_OK);
|
---|
| 566 | /* ...and even more data */
|
---|
| 567 | err = tcp_write(pcb, data5, sizeof(data5), TCP_WRITE_FLAG_COPY);
|
---|
| 568 | EXPECT_RET(err == ERR_OK);
|
---|
| 569 | err = tcp_output(pcb);
|
---|
| 570 | EXPECT_RET(err == ERR_OK);
|
---|
| 571 |
|
---|
| 572 | /* send ACKs for data2 and data3 */
|
---|
| 573 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 12, TCP_ACK);
|
---|
| 574 | EXPECT_RET(p != NULL);
|
---|
| 575 | test_tcp_input(p, &netif);
|
---|
| 576 | /*EXPECT_RET(txcounters.num_tx_calls == 0);*/
|
---|
| 577 |
|
---|
| 578 | /* ...and even more data */
|
---|
| 579 | err = tcp_write(pcb, data5, sizeof(data5), TCP_WRITE_FLAG_COPY);
|
---|
| 580 | EXPECT_RET(err == ERR_OK);
|
---|
| 581 | err = tcp_output(pcb);
|
---|
| 582 | EXPECT_RET(err == ERR_OK);
|
---|
| 583 | /* ...and even more data */
|
---|
| 584 | err = tcp_write(pcb, data5, sizeof(data5), TCP_WRITE_FLAG_COPY);
|
---|
| 585 | EXPECT_RET(err == ERR_OK);
|
---|
| 586 | err = tcp_output(pcb);
|
---|
| 587 | EXPECT_RET(err == ERR_OK);
|
---|
| 588 |
|
---|
| 589 | #if 0
|
---|
| 590 | /* create expected segment */
|
---|
| 591 | p1 = tcp_create_rx_segment(pcb, counters.expected_data, data_len, 0, 0, 0);
|
---|
| 592 | EXPECT_RET(p != NULL);
|
---|
| 593 | if (p != NULL) {
|
---|
| 594 | /* pass the segment to tcp_input */
|
---|
| 595 | test_tcp_input(p, &netif);
|
---|
| 596 | /* check if counters are as expected */
|
---|
| 597 | EXPECT_RET(counters.close_calls == 0);
|
---|
| 598 | EXPECT_RET(counters.recv_calls == 1);
|
---|
| 599 | EXPECT_RET(counters.recved_bytes == data_len);
|
---|
| 600 | EXPECT_RET(counters.err_calls == 0);
|
---|
| 601 | }
|
---|
| 602 | #endif
|
---|
| 603 | /* make sure the pcb is freed */
|
---|
| 604 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
|
---|
| 605 | tcp_abort(pcb);
|
---|
| 606 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 607 | }
|
---|
| 608 | END_TEST
|
---|
| 609 |
|
---|
| 610 | static u8_t tx_data[TCP_WND*2];
|
---|
| 611 |
|
---|
| 612 | static void
|
---|
| 613 | check_seqnos(struct tcp_seg *segs, int num_expected, u32_t *seqnos_expected)
|
---|
| 614 | {
|
---|
| 615 | struct tcp_seg *s = segs;
|
---|
| 616 | int i;
|
---|
| 617 | for (i = 0; i < num_expected; i++, s = s->next) {
|
---|
| 618 | EXPECT_RET(s != NULL);
|
---|
| 619 | EXPECT(s->tcphdr->seqno == htonl(seqnos_expected[i]));
|
---|
| 620 | }
|
---|
| 621 | EXPECT(s == NULL);
|
---|
| 622 | }
|
---|
| 623 |
|
---|
| 624 | /** Send data with sequence numbers that wrap around the u32_t range.
|
---|
| 625 | * Then, provoke fast retransmission by duplicate ACKs and check that all
|
---|
| 626 | * segment lists are still properly sorted. */
|
---|
| 627 | START_TEST(test_tcp_fast_rexmit_wraparound)
|
---|
| 628 | {
|
---|
| 629 | struct netif netif;
|
---|
| 630 | struct test_tcp_txcounters txcounters;
|
---|
| 631 | struct test_tcp_counters counters;
|
---|
| 632 | struct tcp_pcb* pcb;
|
---|
| 633 | struct pbuf* p;
|
---|
| 634 | err_t err;
|
---|
| 635 | size_t i;
|
---|
| 636 | u16_t sent_total = 0;
|
---|
| 637 | LWIP_UNUSED_ARG(_i);
|
---|
| 638 |
|
---|
| 639 | for (i = 0; i < sizeof(tx_data); i++) {
|
---|
| 640 | tx_data[i] = (u8_t)i;
|
---|
| 641 | }
|
---|
| 642 |
|
---|
| 643 | /* initialize local vars */
|
---|
| 644 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
|
---|
| 645 | memset(&counters, 0, sizeof(counters));
|
---|
| 646 |
|
---|
| 647 | /* create and initialize the pcb */
|
---|
| 648 | tcp_ticks = SEQNO1 - ISS;
|
---|
| 649 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 650 | EXPECT_RET(pcb != NULL);
|
---|
| 651 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
|
---|
| 652 | pcb->mss = TCP_MSS;
|
---|
| 653 | /* disable initial congestion window (we don't send a SYN here...) */
|
---|
| 654 | pcb->cwnd = 2*TCP_MSS;
|
---|
| 655 | /* start in congestion advoidance */
|
---|
| 656 | pcb->ssthresh = pcb->cwnd;
|
---|
| 657 |
|
---|
| 658 | /* send 6 mss-sized segments */
|
---|
| 659 | for (i = 0; i < 6; i++) {
|
---|
| 660 | err = tcp_write(pcb, &tx_data[sent_total], TCP_MSS, TCP_WRITE_FLAG_COPY);
|
---|
| 661 | EXPECT_RET(err == ERR_OK);
|
---|
| 662 | sent_total += TCP_MSS;
|
---|
| 663 | }
|
---|
| 664 | check_seqnos(pcb->unsent, 6, seqnos);
|
---|
| 665 | EXPECT(pcb->unacked == NULL);
|
---|
| 666 | err = tcp_output(pcb);
|
---|
| 667 | EXPECT(txcounters.num_tx_calls == 2);
|
---|
| 668 | EXPECT(txcounters.num_tx_bytes == 2 * (TCP_MSS + 40U));
|
---|
| 669 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 670 |
|
---|
| 671 | check_seqnos(pcb->unacked, 2, seqnos);
|
---|
| 672 | check_seqnos(pcb->unsent, 4, &seqnos[2]);
|
---|
| 673 |
|
---|
| 674 | /* ACK the first segment */
|
---|
| 675 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, TCP_MSS, TCP_ACK);
|
---|
| 676 | test_tcp_input(p, &netif);
|
---|
| 677 | /* ensure this didn't trigger a retransmission. Only one
|
---|
| 678 | segment should be transmitted because cwnd opened up by
|
---|
| 679 | TCP_MSS and a fraction since we are in congestion avoidance */
|
---|
| 680 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 681 | EXPECT(txcounters.num_tx_bytes == TCP_MSS + 40U);
|
---|
| 682 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 683 | check_seqnos(pcb->unacked, 2, &seqnos[1]);
|
---|
| 684 | check_seqnos(pcb->unsent, 3, &seqnos[3]);
|
---|
| 685 |
|
---|
| 686 | /* 3 dupacks */
|
---|
| 687 | EXPECT(pcb->dupacks == 0);
|
---|
| 688 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 0, TCP_ACK);
|
---|
| 689 | test_tcp_input(p, &netif);
|
---|
| 690 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 691 | EXPECT(pcb->dupacks == 1);
|
---|
| 692 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 0, TCP_ACK);
|
---|
| 693 | test_tcp_input(p, &netif);
|
---|
| 694 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 695 | EXPECT(pcb->dupacks == 2);
|
---|
| 696 | /* 3rd dupack -> fast rexmit */
|
---|
| 697 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 0, TCP_ACK);
|
---|
| 698 | test_tcp_input(p, &netif);
|
---|
| 699 | EXPECT(pcb->dupacks == 3);
|
---|
| 700 | EXPECT(txcounters.num_tx_calls == 4);
|
---|
| 701 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 702 | EXPECT(pcb->unsent == NULL);
|
---|
| 703 | check_seqnos(pcb->unacked, 5, &seqnos[1]);
|
---|
| 704 |
|
---|
| 705 | /* make sure the pcb is freed */
|
---|
| 706 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
|
---|
| 707 | tcp_abort(pcb);
|
---|
| 708 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 709 | }
|
---|
| 710 | END_TEST
|
---|
| 711 |
|
---|
| 712 | /** Send data with sequence numbers that wrap around the u32_t range.
|
---|
| 713 | * Then, provoke RTO retransmission and check that all
|
---|
| 714 | * segment lists are still properly sorted. */
|
---|
| 715 | START_TEST(test_tcp_rto_rexmit_wraparound)
|
---|
| 716 | {
|
---|
| 717 | struct netif netif;
|
---|
| 718 | struct test_tcp_txcounters txcounters;
|
---|
| 719 | struct test_tcp_counters counters;
|
---|
| 720 | struct tcp_pcb* pcb;
|
---|
| 721 | struct tcp_pcb dummy_pcb_for_iss; /* we need this for tcp_next_iss() only */
|
---|
| 722 | err_t err;
|
---|
| 723 | size_t i;
|
---|
| 724 | u16_t sent_total = 0;
|
---|
| 725 | LWIP_UNUSED_ARG(_i);
|
---|
| 726 |
|
---|
| 727 | for (i = 0; i < sizeof(tx_data); i++) {
|
---|
| 728 | tx_data[i] = (u8_t)i;
|
---|
| 729 | }
|
---|
| 730 |
|
---|
| 731 | /* initialize local vars */
|
---|
| 732 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
|
---|
| 733 | memset(&counters, 0, sizeof(counters));
|
---|
| 734 |
|
---|
| 735 | /* create and initialize the pcb */
|
---|
| 736 | tcp_ticks = 0;
|
---|
| 737 | tcp_ticks = 0 - tcp_next_iss(&dummy_pcb_for_iss);
|
---|
| 738 | tcp_ticks = SEQNO1 - tcp_next_iss(&dummy_pcb_for_iss);
|
---|
| 739 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 740 | EXPECT_RET(pcb != NULL);
|
---|
| 741 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
|
---|
| 742 | pcb->mss = TCP_MSS;
|
---|
| 743 | /* disable initial congestion window (we don't send a SYN here...) */
|
---|
| 744 | pcb->cwnd = 2*TCP_MSS;
|
---|
| 745 |
|
---|
| 746 | /* send 6 mss-sized segments */
|
---|
| 747 | for (i = 0; i < 6; i++) {
|
---|
| 748 | err = tcp_write(pcb, &tx_data[sent_total], TCP_MSS, TCP_WRITE_FLAG_COPY);
|
---|
| 749 | EXPECT_RET(err == ERR_OK);
|
---|
| 750 | sent_total += TCP_MSS;
|
---|
| 751 | }
|
---|
| 752 | check_seqnos(pcb->unsent, 6, seqnos);
|
---|
| 753 | EXPECT(pcb->unacked == NULL);
|
---|
| 754 | err = tcp_output(pcb);
|
---|
| 755 | EXPECT(txcounters.num_tx_calls == 2);
|
---|
| 756 | EXPECT(txcounters.num_tx_bytes == 2 * (TCP_MSS + 40U));
|
---|
| 757 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 758 |
|
---|
| 759 | check_seqnos(pcb->unacked, 2, seqnos);
|
---|
| 760 | check_seqnos(pcb->unsent, 4, &seqnos[2]);
|
---|
| 761 |
|
---|
| 762 | /* call the tcp timer some times */
|
---|
| 763 | for (i = 0; i < 10; i++) {
|
---|
| 764 | test_tcp_tmr();
|
---|
| 765 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 766 | }
|
---|
| 767 | /* 11th call to tcp_tmr: RTO rexmit fires */
|
---|
| 768 | test_tcp_tmr();
|
---|
| 769 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 770 | check_seqnos(pcb->unacked, 1, seqnos);
|
---|
| 771 | check_seqnos(pcb->unsent, 5, &seqnos[1]);
|
---|
| 772 |
|
---|
| 773 | /* fake greater cwnd */
|
---|
| 774 | pcb->cwnd = pcb->snd_wnd;
|
---|
| 775 | /* send more data */
|
---|
| 776 | err = tcp_output(pcb);
|
---|
| 777 | EXPECT(err == ERR_OK);
|
---|
| 778 | /* check queues are sorted */
|
---|
| 779 | EXPECT(pcb->unsent == NULL);
|
---|
| 780 | check_seqnos(pcb->unacked, 6, seqnos);
|
---|
| 781 |
|
---|
| 782 | /* make sure the pcb is freed */
|
---|
| 783 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
|
---|
| 784 | tcp_abort(pcb);
|
---|
| 785 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 786 | }
|
---|
| 787 | END_TEST
|
---|
| 788 |
|
---|
| 789 | /** Provoke fast retransmission by duplicate ACKs and then recover by ACKing all sent data.
|
---|
| 790 | * At the end, send more data. */
|
---|
| 791 | static void test_tcp_tx_full_window_lost(u8_t zero_window_probe_from_unsent)
|
---|
| 792 | {
|
---|
| 793 | struct netif netif;
|
---|
| 794 | struct test_tcp_txcounters txcounters;
|
---|
| 795 | struct test_tcp_counters counters;
|
---|
| 796 | struct tcp_pcb* pcb;
|
---|
| 797 | struct pbuf *p;
|
---|
| 798 | err_t err;
|
---|
| 799 | size_t i;
|
---|
| 800 | u16_t sent_total;
|
---|
| 801 | u8_t expected = 0xFE;
|
---|
| 802 |
|
---|
| 803 | for (i = 0; i < sizeof(tx_data); i++) {
|
---|
| 804 | u8_t d = (u8_t)i;
|
---|
| 805 | if (d == 0xFE) {
|
---|
| 806 | d = 0xF0;
|
---|
| 807 | }
|
---|
| 808 | tx_data[i] = d;
|
---|
| 809 | }
|
---|
| 810 | if (zero_window_probe_from_unsent) {
|
---|
| 811 | tx_data[TCP_WND] = expected;
|
---|
| 812 | } else {
|
---|
| 813 | tx_data[0] = expected;
|
---|
| 814 | }
|
---|
| 815 |
|
---|
| 816 | /* initialize local vars */
|
---|
| 817 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
|
---|
| 818 | memset(&counters, 0, sizeof(counters));
|
---|
| 819 |
|
---|
| 820 | /* create and initialize the pcb */
|
---|
| 821 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 822 | EXPECT_RET(pcb != NULL);
|
---|
| 823 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
|
---|
| 824 | pcb->mss = TCP_MSS;
|
---|
| 825 | /* disable initial congestion window (we don't send a SYN here...) */
|
---|
| 826 | pcb->cwnd = pcb->snd_wnd;
|
---|
| 827 |
|
---|
| 828 | /* send a full window (minus 1 packets) of TCP data in MSS-sized chunks */
|
---|
| 829 | sent_total = 0;
|
---|
| 830 | if ((TCP_WND - TCP_MSS) % TCP_MSS != 0) {
|
---|
| 831 | u16_t initial_data_len = (TCP_WND - TCP_MSS) % TCP_MSS;
|
---|
| 832 | err = tcp_write(pcb, &tx_data[sent_total], initial_data_len, TCP_WRITE_FLAG_COPY);
|
---|
| 833 | EXPECT_RET(err == ERR_OK);
|
---|
| 834 | err = tcp_output(pcb);
|
---|
| 835 | EXPECT_RET(err == ERR_OK);
|
---|
| 836 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 837 | EXPECT(txcounters.num_tx_bytes == initial_data_len + 40U);
|
---|
| 838 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 839 | sent_total += initial_data_len;
|
---|
| 840 | }
|
---|
| 841 | for (; sent_total < (TCP_WND - TCP_MSS); sent_total += TCP_MSS) {
|
---|
| 842 | err = tcp_write(pcb, &tx_data[sent_total], TCP_MSS, TCP_WRITE_FLAG_COPY);
|
---|
| 843 | EXPECT_RET(err == ERR_OK);
|
---|
| 844 | err = tcp_output(pcb);
|
---|
| 845 | EXPECT_RET(err == ERR_OK);
|
---|
| 846 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 847 | EXPECT(txcounters.num_tx_bytes == TCP_MSS + 40U);
|
---|
| 848 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 849 | }
|
---|
| 850 | EXPECT(sent_total == (TCP_WND - TCP_MSS));
|
---|
| 851 |
|
---|
| 852 | /* now ACK the packet before the first */
|
---|
| 853 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 0, TCP_ACK);
|
---|
| 854 | test_tcp_input(p, &netif);
|
---|
| 855 | /* ensure this didn't trigger a retransmission */
|
---|
| 856 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 857 | EXPECT(txcounters.num_tx_bytes == 0);
|
---|
| 858 |
|
---|
| 859 | EXPECT(pcb->persist_backoff == 0);
|
---|
| 860 | /* send the last packet, now a complete window has been sent */
|
---|
| 861 | err = tcp_write(pcb, &tx_data[sent_total], TCP_MSS, TCP_WRITE_FLAG_COPY);
|
---|
| 862 | sent_total += TCP_MSS;
|
---|
| 863 | EXPECT_RET(err == ERR_OK);
|
---|
| 864 | err = tcp_output(pcb);
|
---|
| 865 | EXPECT_RET(err == ERR_OK);
|
---|
| 866 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 867 | EXPECT(txcounters.num_tx_bytes == TCP_MSS + 40U);
|
---|
| 868 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 869 | EXPECT(pcb->persist_backoff == 0);
|
---|
| 870 |
|
---|
| 871 | if (zero_window_probe_from_unsent) {
|
---|
| 872 | /* ACK all data but close the TX window */
|
---|
| 873 | p = tcp_create_rx_segment_wnd(pcb, NULL, 0, 0, TCP_WND, TCP_ACK, 0);
|
---|
| 874 | test_tcp_input(p, &netif);
|
---|
| 875 | /* ensure this didn't trigger any transmission */
|
---|
| 876 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 877 | EXPECT(txcounters.num_tx_bytes == 0);
|
---|
| 878 | /* window is completely full, but persist timer is off since send buffer is empty */
|
---|
| 879 | EXPECT(pcb->snd_wnd == 0);
|
---|
| 880 | EXPECT(pcb->persist_backoff == 0);
|
---|
| 881 | }
|
---|
| 882 |
|
---|
| 883 | /* send one byte more (out of window) -> persist timer starts */
|
---|
| 884 | err = tcp_write(pcb, &tx_data[sent_total], 1, TCP_WRITE_FLAG_COPY);
|
---|
| 885 | EXPECT_RET(err == ERR_OK);
|
---|
| 886 | err = tcp_output(pcb);
|
---|
| 887 | EXPECT_RET(err == ERR_OK);
|
---|
| 888 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 889 | EXPECT(txcounters.num_tx_bytes == 0);
|
---|
| 890 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 891 | if (!zero_window_probe_from_unsent) {
|
---|
| 892 | /* no persist timer unless a zero window announcement has been received */
|
---|
| 893 | EXPECT(pcb->persist_backoff == 0);
|
---|
| 894 | } else {
|
---|
| 895 | EXPECT(pcb->persist_backoff == 1);
|
---|
| 896 |
|
---|
| 897 | /* call tcp_timer some more times to let persist timer count up */
|
---|
| 898 | for (i = 0; i < 4; i++) {
|
---|
| 899 | test_tcp_tmr();
|
---|
| 900 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 901 | EXPECT(txcounters.num_tx_bytes == 0);
|
---|
| 902 | }
|
---|
| 903 |
|
---|
| 904 | /* this should trigger the zero-window-probe */
|
---|
| 905 | txcounters.copy_tx_packets = 1;
|
---|
| 906 | test_tcp_tmr();
|
---|
| 907 | txcounters.copy_tx_packets = 0;
|
---|
| 908 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 909 | EXPECT(txcounters.num_tx_bytes == 1 + 40U);
|
---|
| 910 | EXPECT(txcounters.tx_packets != NULL);
|
---|
| 911 | if (txcounters.tx_packets != NULL) {
|
---|
| 912 | u8_t sent;
|
---|
| 913 | u16_t ret;
|
---|
| 914 | ret = pbuf_copy_partial(txcounters.tx_packets, &sent, 1, 40U);
|
---|
| 915 | EXPECT(ret == 1);
|
---|
| 916 | EXPECT(sent == expected);
|
---|
| 917 | }
|
---|
| 918 | if (txcounters.tx_packets != NULL) {
|
---|
| 919 | pbuf_free(txcounters.tx_packets);
|
---|
| 920 | txcounters.tx_packets = NULL;
|
---|
| 921 | }
|
---|
| 922 | }
|
---|
| 923 |
|
---|
| 924 | /* make sure the pcb is freed */
|
---|
| 925 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
|
---|
| 926 | tcp_abort(pcb);
|
---|
| 927 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 928 | }
|
---|
| 929 |
|
---|
| 930 | START_TEST(test_tcp_tx_full_window_lost_from_unsent)
|
---|
| 931 | {
|
---|
| 932 | LWIP_UNUSED_ARG(_i);
|
---|
| 933 | test_tcp_tx_full_window_lost(1);
|
---|
| 934 | }
|
---|
| 935 | END_TEST
|
---|
| 936 |
|
---|
| 937 | START_TEST(test_tcp_tx_full_window_lost_from_unacked)
|
---|
| 938 | {
|
---|
| 939 | LWIP_UNUSED_ARG(_i);
|
---|
| 940 | test_tcp_tx_full_window_lost(0);
|
---|
| 941 | }
|
---|
| 942 | END_TEST
|
---|
| 943 |
|
---|
| 944 | /** Send data, provoke retransmission and then add data to a segment
|
---|
| 945 | * that already has been sent before. */
|
---|
| 946 | START_TEST(test_tcp_retx_add_to_sent)
|
---|
| 947 | {
|
---|
| 948 | struct netif netif;
|
---|
| 949 | struct test_tcp_txcounters txcounters;
|
---|
| 950 | struct test_tcp_counters counters;
|
---|
| 951 | struct tcp_pcb* pcb;
|
---|
| 952 | struct pbuf* p;
|
---|
| 953 | char data1a[] = { 1, 2, 3};
|
---|
| 954 | char data1b[] = { 4};
|
---|
| 955 | char data2a[] = { 5, 6, 7, 8};
|
---|
| 956 | char data2b[] = { 5, 6, 7};
|
---|
| 957 | char data3[] = { 9, 10, 11, 12, 12};
|
---|
| 958 | char data4[] = { 13, 14, 15, 16,17};
|
---|
| 959 | err_t err;
|
---|
| 960 | int i;
|
---|
| 961 | LWIP_UNUSED_ARG(_i);
|
---|
| 962 |
|
---|
| 963 | /* initialize local vars */
|
---|
| 964 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
|
---|
| 965 | memset(&counters, 0, sizeof(counters));
|
---|
| 966 |
|
---|
| 967 | /* create and initialize the pcb */
|
---|
| 968 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 969 | EXPECT_RET(pcb != NULL);
|
---|
| 970 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
|
---|
| 971 | pcb->mss = TCP_MSS;
|
---|
| 972 | /* disable initial congestion window (we don't send a SYN here...) */
|
---|
| 973 | pcb->cwnd = pcb->snd_wnd;
|
---|
| 974 |
|
---|
| 975 | /* send data1 */
|
---|
| 976 | err = tcp_write(pcb, data1a, sizeof(data1a), TCP_WRITE_FLAG_COPY);
|
---|
| 977 | EXPECT_RET(err == ERR_OK);
|
---|
| 978 | err = tcp_write(pcb, data1b, sizeof(data1b), TCP_WRITE_FLAG_COPY);
|
---|
| 979 | EXPECT_RET(err == ERR_OK);
|
---|
| 980 | err = tcp_output(pcb);
|
---|
| 981 | EXPECT_RET(err == ERR_OK);
|
---|
| 982 | EXPECT_RET(txcounters.num_tx_calls == 1);
|
---|
| 983 | EXPECT_RET(txcounters.num_tx_bytes == sizeof(data1a) + sizeof(data1b) + sizeof(struct tcp_hdr) + sizeof(struct ip_hdr));
|
---|
| 984 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 985 | /* "recv" ACK for data1 */
|
---|
| 986 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 4, TCP_ACK);
|
---|
| 987 | EXPECT_RET(p != NULL);
|
---|
| 988 | test_tcp_input(p, &netif);
|
---|
| 989 | EXPECT_RET(txcounters.num_tx_calls == 0);
|
---|
| 990 | EXPECT_RET(pcb->unacked == NULL);
|
---|
| 991 | /* send data2 */
|
---|
| 992 | err = tcp_write(pcb, data2a, sizeof(data2a), TCP_WRITE_FLAG_COPY);
|
---|
| 993 | EXPECT_RET(err == ERR_OK);
|
---|
| 994 | err = tcp_write(pcb, data2b, sizeof(data2b), TCP_WRITE_FLAG_COPY);
|
---|
| 995 | EXPECT_RET(err == ERR_OK);
|
---|
| 996 | err = tcp_output(pcb);
|
---|
| 997 | EXPECT_RET(err == ERR_OK);
|
---|
| 998 | EXPECT_RET(txcounters.num_tx_calls == 1);
|
---|
| 999 | EXPECT_RET(txcounters.num_tx_bytes == sizeof(data2a) + sizeof(data2b) + sizeof(struct tcp_hdr) + sizeof(struct ip_hdr));
|
---|
| 1000 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1001 | /* send data3 */
|
---|
| 1002 | err = tcp_write(pcb, data3, sizeof(data3), TCP_WRITE_FLAG_COPY);
|
---|
| 1003 | EXPECT_RET(err == ERR_OK);
|
---|
| 1004 | err = tcp_output(pcb);
|
---|
| 1005 | EXPECT_RET(err == ERR_OK);
|
---|
| 1006 | EXPECT_RET(txcounters.num_tx_calls == 0);
|
---|
| 1007 | EXPECT_RET(txcounters.num_tx_bytes == 0);
|
---|
| 1008 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1009 |
|
---|
| 1010 | /* data3 not sent yet (nagle) */
|
---|
| 1011 | EXPECT_RET(pcb->unacked != NULL);
|
---|
| 1012 | EXPECT_RET(pcb->unsent != NULL);
|
---|
| 1013 |
|
---|
| 1014 | /* disable nagle for this test so data to sent segment can be added below... */
|
---|
| 1015 | tcp_nagle_disable(pcb);
|
---|
| 1016 |
|
---|
| 1017 | /* call the tcp timer some times */
|
---|
| 1018 | for (i = 0; i < 20; i++) {
|
---|
| 1019 | test_tcp_tmr();
|
---|
| 1020 | if (txcounters.num_tx_calls != 0) {
|
---|
| 1021 | break;
|
---|
| 1022 | }
|
---|
| 1023 | }
|
---|
| 1024 | /* data3 sent */
|
---|
| 1025 | EXPECT_RET(txcounters.num_tx_calls == 1);
|
---|
| 1026 | EXPECT_RET(txcounters.num_tx_bytes == sizeof(data3) + sizeof(struct tcp_hdr) + sizeof(struct ip_hdr));
|
---|
| 1027 | EXPECT_RET(pcb->unacked != NULL);
|
---|
| 1028 | EXPECT_RET(pcb->unsent == NULL);
|
---|
| 1029 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1030 |
|
---|
| 1031 | tcp_nagle_enable(pcb);
|
---|
| 1032 |
|
---|
| 1033 | /* call the tcp timer some times */
|
---|
| 1034 | for (i = 0; i < 20; i++) {
|
---|
| 1035 | test_tcp_tmr();
|
---|
| 1036 | if (txcounters.num_tx_calls != 0) {
|
---|
| 1037 | break;
|
---|
| 1038 | }
|
---|
| 1039 | }
|
---|
| 1040 | /* RTO: rexmit of data2 */
|
---|
| 1041 | EXPECT_RET(txcounters.num_tx_calls == 1);
|
---|
| 1042 | EXPECT_RET(txcounters.num_tx_bytes == sizeof(data2a) + sizeof(data2b) + sizeof(struct tcp_hdr) + sizeof(struct ip_hdr));
|
---|
| 1043 | EXPECT_RET(pcb->unacked != NULL);
|
---|
| 1044 | EXPECT_RET(pcb->unsent != NULL);
|
---|
| 1045 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1046 |
|
---|
| 1047 | /* send data4 */
|
---|
| 1048 | err = tcp_write(pcb, data4, sizeof(data4), TCP_WRITE_FLAG_COPY);
|
---|
| 1049 | EXPECT_RET(err == ERR_OK);
|
---|
| 1050 | /* disable nagle for this test so data to transmit without further ACKs... */
|
---|
| 1051 | tcp_nagle_disable(pcb);
|
---|
| 1052 | err = tcp_output(pcb);
|
---|
| 1053 | EXPECT_RET(err == ERR_OK);
|
---|
| 1054 | /* nagle enabled, no tx calls */
|
---|
| 1055 | EXPECT_RET(txcounters.num_tx_calls == 1);
|
---|
| 1056 | EXPECT_RET(txcounters.num_tx_bytes == sizeof(data3) + sizeof(data4) + sizeof(struct tcp_hdr) + sizeof(struct ip_hdr));
|
---|
| 1057 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1058 | /* make sure the pcb is freed */
|
---|
| 1059 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
|
---|
| 1060 | tcp_abort(pcb);
|
---|
| 1061 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 1062 | }
|
---|
| 1063 | END_TEST
|
---|
| 1064 |
|
---|
| 1065 | START_TEST(test_tcp_rto_tracking)
|
---|
| 1066 | {
|
---|
| 1067 | struct netif netif;
|
---|
| 1068 | struct test_tcp_txcounters txcounters;
|
---|
| 1069 | struct test_tcp_counters counters;
|
---|
| 1070 | struct tcp_pcb* pcb;
|
---|
| 1071 | struct pbuf* p;
|
---|
| 1072 | err_t err;
|
---|
| 1073 | size_t i;
|
---|
| 1074 | u16_t sent_total = 0;
|
---|
| 1075 | LWIP_UNUSED_ARG(_i);
|
---|
| 1076 |
|
---|
| 1077 | for (i = 0; i < sizeof(tx_data); i++) {
|
---|
| 1078 | tx_data[i] = (u8_t)i;
|
---|
| 1079 | }
|
---|
| 1080 |
|
---|
| 1081 | /* initialize local vars */
|
---|
| 1082 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
|
---|
| 1083 | memset(&counters, 0, sizeof(counters));
|
---|
| 1084 |
|
---|
| 1085 | /* create and initialize the pcb */
|
---|
| 1086 | tcp_ticks = SEQNO1 - ISS;
|
---|
| 1087 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 1088 | EXPECT_RET(pcb != NULL);
|
---|
| 1089 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
|
---|
| 1090 | pcb->mss = TCP_MSS;
|
---|
| 1091 | /* Set congestion window large enough to send all our segments */
|
---|
| 1092 | pcb->cwnd = 5*TCP_MSS;
|
---|
| 1093 |
|
---|
| 1094 | /* send 5 mss-sized segments */
|
---|
| 1095 | for (i = 0; i < 5; i++) {
|
---|
| 1096 | err = tcp_write(pcb, &tx_data[sent_total], TCP_MSS, TCP_WRITE_FLAG_COPY);
|
---|
| 1097 | EXPECT_RET(err == ERR_OK);
|
---|
| 1098 | sent_total += TCP_MSS;
|
---|
| 1099 | }
|
---|
| 1100 | check_seqnos(pcb->unsent, 5, seqnos);
|
---|
| 1101 | EXPECT(pcb->unacked == NULL);
|
---|
| 1102 | err = tcp_output(pcb);
|
---|
| 1103 | EXPECT(txcounters.num_tx_calls == 5);
|
---|
| 1104 | EXPECT(txcounters.num_tx_bytes == 5 * (TCP_MSS + 40U));
|
---|
| 1105 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1106 | /* Check all 5 are in-flight */
|
---|
| 1107 | EXPECT(pcb->unsent == NULL);
|
---|
| 1108 | check_seqnos(pcb->unacked, 5, seqnos);
|
---|
| 1109 |
|
---|
| 1110 | /* Force us into retransmisson timeout */
|
---|
| 1111 | while (!(pcb->flags & TF_RTO)) {
|
---|
| 1112 | test_tcp_tmr();
|
---|
| 1113 | }
|
---|
| 1114 | /* Ensure 4 remaining segments are back on unsent, ready for retransmission */
|
---|
| 1115 | check_seqnos(pcb->unsent, 4, &seqnos[1]);
|
---|
| 1116 | /* Ensure 1st segment is on unacked (already retransmitted) */
|
---|
| 1117 | check_seqnos(pcb->unacked, 1, seqnos);
|
---|
| 1118 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1119 | EXPECT(txcounters.num_tx_bytes == TCP_MSS + 40U);
|
---|
| 1120 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1121 | /* Ensure rto_end points to next byte */
|
---|
| 1122 | EXPECT(pcb->rto_end == seqnos[5]);
|
---|
| 1123 | EXPECT(pcb->rto_end == pcb->snd_nxt);
|
---|
| 1124 | /* Check cwnd was reset */
|
---|
| 1125 | EXPECT(pcb->cwnd == pcb->mss);
|
---|
| 1126 |
|
---|
| 1127 | /* Add another segment to send buffer which is outside of RTO */
|
---|
| 1128 | err = tcp_write(pcb, &tx_data[sent_total], TCP_MSS, TCP_WRITE_FLAG_COPY);
|
---|
| 1129 | EXPECT_RET(err == ERR_OK);
|
---|
| 1130 | sent_total += TCP_MSS;
|
---|
| 1131 | check_seqnos(pcb->unsent, 5, &seqnos[1]);
|
---|
| 1132 | /* Ensure no new data was sent */
|
---|
| 1133 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 1134 | EXPECT(txcounters.num_tx_bytes == 0);
|
---|
| 1135 | EXPECT(pcb->rto_end == pcb->snd_nxt);
|
---|
| 1136 |
|
---|
| 1137 | /* ACK first segment */
|
---|
| 1138 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, TCP_MSS, TCP_ACK);
|
---|
| 1139 | test_tcp_input(p, &netif);
|
---|
| 1140 | /* Next two retranmissions should go out, due to cwnd in slow start */
|
---|
| 1141 | EXPECT(txcounters.num_tx_calls == 2);
|
---|
| 1142 | EXPECT(txcounters.num_tx_bytes == 2 * (TCP_MSS + 40U));
|
---|
| 1143 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1144 | check_seqnos(pcb->unacked, 2, &seqnos[1]);
|
---|
| 1145 | check_seqnos(pcb->unsent, 3, &seqnos[3]);
|
---|
| 1146 | /* RTO should still be marked */
|
---|
| 1147 | EXPECT(pcb->flags & TF_RTO);
|
---|
| 1148 | /* cwnd should have only grown by 1 MSS */
|
---|
| 1149 | EXPECT(pcb->cwnd == (tcpwnd_size_t)(2 * pcb->mss));
|
---|
| 1150 | /* Ensure no new data was sent */
|
---|
| 1151 | EXPECT(pcb->rto_end == pcb->snd_nxt);
|
---|
| 1152 |
|
---|
| 1153 | /* ACK the next two segments */
|
---|
| 1154 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 2*TCP_MSS, TCP_ACK);
|
---|
| 1155 | test_tcp_input(p, &netif);
|
---|
| 1156 | /* Final 2 retransmissions and 1 new data should go out */
|
---|
| 1157 | EXPECT(txcounters.num_tx_calls == 3);
|
---|
| 1158 | EXPECT(txcounters.num_tx_bytes == 3 * (TCP_MSS + 40U));
|
---|
| 1159 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1160 | check_seqnos(pcb->unacked, 3, &seqnos[3]);
|
---|
| 1161 | EXPECT(pcb->unsent == NULL);
|
---|
| 1162 | /* RTO should still be marked */
|
---|
| 1163 | EXPECT(pcb->flags & TF_RTO);
|
---|
| 1164 | /* cwnd should have only grown by 1 MSS */
|
---|
| 1165 | EXPECT(pcb->cwnd == (tcpwnd_size_t)(3 * pcb->mss));
|
---|
| 1166 | /* snd_nxt should have been advanced past rto_end */
|
---|
| 1167 | EXPECT(TCP_SEQ_GT(pcb->snd_nxt, pcb->rto_end));
|
---|
| 1168 |
|
---|
| 1169 | /* ACK the next two segments, finishing our RTO, leaving new segment unacked */
|
---|
| 1170 | p = tcp_create_rx_segment(pcb, NULL, 0, 0, 2*TCP_MSS, TCP_ACK);
|
---|
| 1171 | test_tcp_input(p, &netif);
|
---|
| 1172 | EXPECT(!(pcb->flags & TF_RTO));
|
---|
| 1173 | check_seqnos(pcb->unacked, 1, &seqnos[5]);
|
---|
| 1174 | /* We should be in ABC congestion avoidance, so no change in cwnd */
|
---|
| 1175 | EXPECT(pcb->cwnd == (tcpwnd_size_t)(3 * pcb->mss));
|
---|
| 1176 | EXPECT(pcb->cwnd >= pcb->ssthresh);
|
---|
| 1177 | /* Ensure ABC congestion avoidance is tracking bytes acked */
|
---|
| 1178 | EXPECT(pcb->bytes_acked == (tcpwnd_size_t)(2 * pcb->mss));
|
---|
| 1179 |
|
---|
| 1180 | /* make sure the pcb is freed */
|
---|
| 1181 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
|
---|
| 1182 | tcp_abort(pcb);
|
---|
| 1183 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 1184 | }
|
---|
| 1185 | END_TEST
|
---|
| 1186 |
|
---|
| 1187 | static void test_tcp_rto_timeout_impl(int link_down)
|
---|
| 1188 | {
|
---|
| 1189 | struct netif netif;
|
---|
| 1190 | struct test_tcp_txcounters txcounters;
|
---|
| 1191 | struct test_tcp_counters counters;
|
---|
| 1192 | struct tcp_pcb *pcb, *cur;
|
---|
| 1193 | err_t err;
|
---|
| 1194 | size_t i;
|
---|
| 1195 | const size_t max_wait_ctr = 1024 * 1024;
|
---|
| 1196 |
|
---|
| 1197 | /* Setup data for a single segment */
|
---|
| 1198 | for (i = 0; i < TCP_MSS; i++) {
|
---|
| 1199 | tx_data[i] = (u8_t)i;
|
---|
| 1200 | }
|
---|
| 1201 |
|
---|
| 1202 | /* initialize local vars */
|
---|
| 1203 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
|
---|
| 1204 | memset(&counters, 0, sizeof(counters));
|
---|
| 1205 |
|
---|
| 1206 | /* create and initialize the pcb */
|
---|
| 1207 | tcp_ticks = SEQNO1 - ISS;
|
---|
| 1208 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 1209 | EXPECT_RET(pcb != NULL);
|
---|
| 1210 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
|
---|
| 1211 | pcb->mss = TCP_MSS;
|
---|
| 1212 | pcb->cwnd = TCP_MSS;
|
---|
| 1213 |
|
---|
| 1214 | /* send our segment */
|
---|
| 1215 | err = tcp_write(pcb, &tx_data[0], TCP_MSS, TCP_WRITE_FLAG_COPY);
|
---|
| 1216 | EXPECT_RET(err == ERR_OK);
|
---|
| 1217 | err = tcp_output(pcb);
|
---|
| 1218 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1219 | EXPECT(txcounters.num_tx_bytes == 1 * (TCP_MSS + 40U));
|
---|
| 1220 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1221 |
|
---|
| 1222 | /* ensure no errors have been recorded */
|
---|
| 1223 | EXPECT(counters.err_calls == 0);
|
---|
| 1224 | EXPECT(counters.last_err == ERR_OK);
|
---|
| 1225 |
|
---|
| 1226 | /* Force us into retransmisson timeout */
|
---|
| 1227 | for (i = 0; !(pcb->flags & TF_RTO) && i < max_wait_ctr; i++) {
|
---|
| 1228 | test_tcp_tmr();
|
---|
| 1229 | }
|
---|
| 1230 | EXPECT(i < max_wait_ctr);
|
---|
| 1231 |
|
---|
| 1232 | /* check first rexmit */
|
---|
| 1233 | EXPECT(pcb->nrtx == 1);
|
---|
| 1234 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1235 | EXPECT(txcounters.num_tx_bytes == 1 * (TCP_MSS + 40U));
|
---|
| 1236 |
|
---|
| 1237 | /* still no error expected */
|
---|
| 1238 | EXPECT(counters.err_calls == 0);
|
---|
| 1239 | EXPECT(counters.last_err == ERR_OK);
|
---|
| 1240 |
|
---|
| 1241 | if (link_down) {
|
---|
| 1242 | netif_set_link_down(&netif);
|
---|
| 1243 | }
|
---|
| 1244 |
|
---|
| 1245 | /* keep running the timer till we hit our maximum RTO */
|
---|
| 1246 | for (i = 0; counters.last_err == ERR_OK && i < max_wait_ctr; i++) {
|
---|
| 1247 | test_tcp_tmr();
|
---|
| 1248 | }
|
---|
| 1249 | EXPECT(i < max_wait_ctr);
|
---|
| 1250 |
|
---|
| 1251 | /* check number of retransmissions */
|
---|
| 1252 | if (link_down) {
|
---|
| 1253 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1254 | EXPECT(txcounters.num_tx_bytes == 1 * (TCP_MSS + 40U));
|
---|
| 1255 | } else {
|
---|
| 1256 | EXPECT(txcounters.num_tx_calls == TCP_MAXRTX);
|
---|
| 1257 | EXPECT(txcounters.num_tx_bytes == TCP_MAXRTX * (TCP_MSS + 40U));
|
---|
| 1258 | }
|
---|
| 1259 |
|
---|
| 1260 | /* check the connection (pcb) has been aborted */
|
---|
| 1261 | EXPECT(counters.err_calls == 1);
|
---|
| 1262 | EXPECT(counters.last_err == ERR_ABRT);
|
---|
| 1263 | /* check our pcb is no longer active */
|
---|
| 1264 | for (cur = tcp_active_pcbs; cur != NULL; cur = cur->next) {
|
---|
| 1265 | EXPECT(cur != pcb);
|
---|
| 1266 | }
|
---|
| 1267 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 1268 | }
|
---|
| 1269 |
|
---|
| 1270 | START_TEST(test_tcp_rto_timeout)
|
---|
| 1271 | {
|
---|
| 1272 | LWIP_UNUSED_ARG(_i);
|
---|
| 1273 | test_tcp_rto_timeout_impl(0);
|
---|
| 1274 | }
|
---|
| 1275 | END_TEST
|
---|
| 1276 |
|
---|
| 1277 | START_TEST(test_tcp_rto_timeout_link_down)
|
---|
| 1278 | {
|
---|
| 1279 | LWIP_UNUSED_ARG(_i);
|
---|
| 1280 | test_tcp_rto_timeout_impl(1);
|
---|
| 1281 | }
|
---|
| 1282 | END_TEST
|
---|
| 1283 |
|
---|
| 1284 | static void test_tcp_rto_timeout_syn_sent_impl(int link_down)
|
---|
| 1285 | {
|
---|
| 1286 | struct netif netif;
|
---|
| 1287 | struct test_tcp_txcounters txcounters;
|
---|
| 1288 | struct test_tcp_counters counters;
|
---|
| 1289 | struct tcp_pcb *pcb, *cur;
|
---|
| 1290 | err_t err;
|
---|
| 1291 | size_t i;
|
---|
| 1292 | const size_t max_wait_ctr = 1024 * 1024;
|
---|
| 1293 | const u16_t tcp_syn_opts_len = LWIP_TCP_OPT_LENGTH(TF_SEG_OPTS_MSS|TF_SEG_OPTS_WND_SCALE|TF_SEG_OPTS_SACK_PERM|TF_SEG_OPTS_TS);
|
---|
| 1294 |
|
---|
| 1295 | /* Setup data for a single segment */
|
---|
| 1296 | for (i = 0; i < TCP_MSS; i++) {
|
---|
| 1297 | tx_data[i] = (u8_t)i;
|
---|
| 1298 | }
|
---|
| 1299 |
|
---|
| 1300 | /* initialize local vars */
|
---|
| 1301 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
|
---|
| 1302 | memset(&counters, 0, sizeof(counters));
|
---|
| 1303 |
|
---|
| 1304 | /* create and initialize the pcb */
|
---|
| 1305 | tcp_ticks = SEQNO1 - ISS;
|
---|
| 1306 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 1307 | EXPECT_RET(pcb != NULL);
|
---|
| 1308 | err = tcp_connect(pcb, &netif.gw, 123, NULL);
|
---|
| 1309 | EXPECT_RET(err == ERR_OK);
|
---|
| 1310 | EXPECT_RET(pcb->state == SYN_SENT);
|
---|
| 1311 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1312 | EXPECT(txcounters.num_tx_bytes == 40U + tcp_syn_opts_len);
|
---|
| 1313 |
|
---|
| 1314 | /* ensure no errors have been recorded */
|
---|
| 1315 | EXPECT(counters.err_calls == 0);
|
---|
| 1316 | EXPECT(counters.last_err == ERR_OK);
|
---|
| 1317 |
|
---|
| 1318 | txcounters.num_tx_calls = 0;
|
---|
| 1319 | txcounters.num_tx_bytes = 0;
|
---|
| 1320 |
|
---|
| 1321 | /* Force us into retransmisson timeout */
|
---|
| 1322 | for (i = 0; !(pcb->flags & TF_RTO) && i < max_wait_ctr; i++) {
|
---|
| 1323 | test_tcp_tmr();
|
---|
| 1324 | }
|
---|
| 1325 | EXPECT(i < max_wait_ctr);
|
---|
| 1326 |
|
---|
| 1327 | /* check first rexmit */
|
---|
| 1328 | EXPECT(pcb->nrtx == 1);
|
---|
| 1329 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1330 | EXPECT(txcounters.num_tx_bytes == 40U + tcp_syn_opts_len); /* 40: headers; >=: options */
|
---|
| 1331 |
|
---|
| 1332 | /* still no error expected */
|
---|
| 1333 | EXPECT(counters.err_calls == 0);
|
---|
| 1334 | EXPECT(counters.last_err == ERR_OK);
|
---|
| 1335 |
|
---|
| 1336 | if (link_down) {
|
---|
| 1337 | /* set link down and check what happens to the RTO counter */
|
---|
| 1338 | netif_set_link_down(&netif);
|
---|
| 1339 | }
|
---|
| 1340 |
|
---|
| 1341 | /* keep running the timer till we hit our maximum RTO */
|
---|
| 1342 | for (i = 0; counters.last_err == ERR_OK && i < max_wait_ctr; i++) {
|
---|
| 1343 | test_tcp_tmr();
|
---|
| 1344 | }
|
---|
| 1345 | EXPECT(i < max_wait_ctr);
|
---|
| 1346 |
|
---|
| 1347 | /* check number of retransmissions */
|
---|
| 1348 | if (link_down) {
|
---|
| 1349 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1350 | EXPECT(txcounters.num_tx_bytes == 40U + tcp_syn_opts_len);
|
---|
| 1351 | } else {
|
---|
| 1352 | EXPECT(txcounters.num_tx_calls == TCP_SYNMAXRTX);
|
---|
| 1353 | EXPECT(txcounters.num_tx_bytes == TCP_SYNMAXRTX * (tcp_syn_opts_len + 40U));
|
---|
| 1354 | }
|
---|
| 1355 |
|
---|
| 1356 | /* check the connection (pcb) has been aborted */
|
---|
| 1357 | EXPECT(counters.err_calls == 1);
|
---|
| 1358 | EXPECT(counters.last_err == ERR_ABRT);
|
---|
| 1359 | /* check our pcb is no longer active */
|
---|
| 1360 | for (cur = tcp_active_pcbs; cur != NULL; cur = cur->next) {
|
---|
| 1361 | EXPECT(cur != pcb);
|
---|
| 1362 | }
|
---|
| 1363 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 1364 | }
|
---|
| 1365 |
|
---|
| 1366 | START_TEST(test_tcp_rto_timeout_syn_sent)
|
---|
| 1367 | {
|
---|
| 1368 | LWIP_UNUSED_ARG(_i);
|
---|
| 1369 | test_tcp_rto_timeout_syn_sent_impl(0);
|
---|
| 1370 | }
|
---|
| 1371 | END_TEST
|
---|
| 1372 |
|
---|
| 1373 | START_TEST(test_tcp_rto_timeout_syn_sent_link_down)
|
---|
| 1374 | {
|
---|
| 1375 | LWIP_UNUSED_ARG(_i);
|
---|
| 1376 | test_tcp_rto_timeout_syn_sent_impl(1);
|
---|
| 1377 | }
|
---|
| 1378 | END_TEST
|
---|
| 1379 |
|
---|
| 1380 | static void test_tcp_zwp_timeout_impl(int link_down)
|
---|
| 1381 | {
|
---|
| 1382 | struct netif netif;
|
---|
| 1383 | struct test_tcp_txcounters txcounters;
|
---|
| 1384 | struct test_tcp_counters counters;
|
---|
| 1385 | struct tcp_pcb *pcb, *cur;
|
---|
| 1386 | struct pbuf* p;
|
---|
| 1387 | err_t err;
|
---|
| 1388 | size_t i;
|
---|
| 1389 |
|
---|
| 1390 | /* Setup data for two segments */
|
---|
| 1391 | for (i = 0; i < 2*TCP_MSS; i++) {
|
---|
| 1392 | tx_data[i] = (u8_t)i;
|
---|
| 1393 | }
|
---|
| 1394 |
|
---|
| 1395 | /* initialize local vars */
|
---|
| 1396 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
|
---|
| 1397 | memset(&counters, 0, sizeof(counters));
|
---|
| 1398 |
|
---|
| 1399 | /* create and initialize the pcb */
|
---|
| 1400 | tcp_ticks = SEQNO1 - ISS;
|
---|
| 1401 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 1402 | EXPECT_RET(pcb != NULL);
|
---|
| 1403 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
|
---|
| 1404 | pcb->mss = TCP_MSS;
|
---|
| 1405 | pcb->cwnd = TCP_MSS;
|
---|
| 1406 |
|
---|
| 1407 | /* send first segment */
|
---|
| 1408 | err = tcp_write(pcb, &tx_data[0], TCP_MSS, TCP_WRITE_FLAG_COPY);
|
---|
| 1409 | EXPECT(err == ERR_OK);
|
---|
| 1410 | err = tcp_output(pcb);
|
---|
| 1411 | EXPECT(err == ERR_OK);
|
---|
| 1412 |
|
---|
| 1413 | /* verify segment is in-flight */
|
---|
| 1414 | EXPECT(pcb->unsent == NULL);
|
---|
| 1415 | check_seqnos(pcb->unacked, 1, seqnos);
|
---|
| 1416 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1417 | EXPECT(txcounters.num_tx_bytes == 1 * (TCP_MSS + 40U));
|
---|
| 1418 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1419 |
|
---|
| 1420 | /* ACK the segment and close the TX window */
|
---|
| 1421 | p = tcp_create_rx_segment_wnd(pcb, NULL, 0, 0, TCP_MSS, TCP_ACK, 0);
|
---|
| 1422 | test_tcp_input(p, &netif);
|
---|
| 1423 | EXPECT(pcb->unacked == NULL);
|
---|
| 1424 | EXPECT(pcb->unsent == NULL);
|
---|
| 1425 | /* send buffer empty, persist should be off */
|
---|
| 1426 | EXPECT(pcb->persist_backoff == 0);
|
---|
| 1427 | EXPECT(pcb->snd_wnd == 0);
|
---|
| 1428 |
|
---|
| 1429 | /* send second segment, should be buffered */
|
---|
| 1430 | err = tcp_write(pcb, &tx_data[TCP_MSS], TCP_MSS, TCP_WRITE_FLAG_COPY);
|
---|
| 1431 | EXPECT(err == ERR_OK);
|
---|
| 1432 | err = tcp_output(pcb);
|
---|
| 1433 | EXPECT(err == ERR_OK);
|
---|
| 1434 |
|
---|
| 1435 | /* ensure it is buffered and persist timer started */
|
---|
| 1436 | EXPECT(pcb->unacked == NULL);
|
---|
| 1437 | check_seqnos(pcb->unsent, 1, &seqnos[1]);
|
---|
| 1438 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 1439 | EXPECT(txcounters.num_tx_bytes == 0);
|
---|
| 1440 | EXPECT(pcb->persist_backoff == 1);
|
---|
| 1441 |
|
---|
| 1442 | /* ensure no errors have been recorded */
|
---|
| 1443 | EXPECT(counters.err_calls == 0);
|
---|
| 1444 | EXPECT(counters.last_err == ERR_OK);
|
---|
| 1445 |
|
---|
| 1446 | /* run timer till first probe */
|
---|
| 1447 | EXPECT(pcb->persist_probe == 0);
|
---|
| 1448 | while (pcb->persist_probe == 0) {
|
---|
| 1449 | test_tcp_tmr();
|
---|
| 1450 | }
|
---|
| 1451 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1452 | EXPECT(txcounters.num_tx_bytes == (1 + 40U));
|
---|
| 1453 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1454 |
|
---|
| 1455 | /* respond to probe with remote's current SEQ, ACK, and zero-window */
|
---|
| 1456 | p = tcp_create_rx_segment_wnd(pcb, NULL, 0, 0, 0, TCP_ACK, 0);
|
---|
| 1457 | test_tcp_input(p, &netif);
|
---|
| 1458 | /* ensure zero-window is still active, but probe count reset */
|
---|
| 1459 | EXPECT(pcb->persist_backoff > 1);
|
---|
| 1460 | EXPECT(pcb->persist_probe == 0);
|
---|
| 1461 | EXPECT(pcb->snd_wnd == 0);
|
---|
| 1462 |
|
---|
| 1463 | /* ensure no errors have been recorded */
|
---|
| 1464 | EXPECT(counters.err_calls == 0);
|
---|
| 1465 | EXPECT(counters.last_err == ERR_OK);
|
---|
| 1466 |
|
---|
| 1467 | if (link_down) {
|
---|
| 1468 | netif_set_link_down(&netif);
|
---|
| 1469 | }
|
---|
| 1470 |
|
---|
| 1471 | /* now run the timer till we hit our maximum probe count */
|
---|
| 1472 | while (counters.last_err == ERR_OK) {
|
---|
| 1473 | test_tcp_tmr();
|
---|
| 1474 | }
|
---|
| 1475 |
|
---|
| 1476 | if (link_down) {
|
---|
| 1477 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 1478 | EXPECT(txcounters.num_tx_bytes == 0);
|
---|
| 1479 | } else {
|
---|
| 1480 | /* check maximum number of 1 byte probes were sent */
|
---|
| 1481 | EXPECT(txcounters.num_tx_calls == TCP_MAXRTX);
|
---|
| 1482 | EXPECT(txcounters.num_tx_bytes == TCP_MAXRTX * (1 + 40U));
|
---|
| 1483 | }
|
---|
| 1484 |
|
---|
| 1485 | /* check the connection (pcb) has been aborted */
|
---|
| 1486 | EXPECT(counters.err_calls == 1);
|
---|
| 1487 | EXPECT(counters.last_err == ERR_ABRT);
|
---|
| 1488 | /* check our pcb is no longer active */
|
---|
| 1489 | for (cur = tcp_active_pcbs; cur != NULL; cur = cur->next) {
|
---|
| 1490 | EXPECT(cur != pcb);
|
---|
| 1491 | }
|
---|
| 1492 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 1493 | }
|
---|
| 1494 |
|
---|
| 1495 | START_TEST(test_tcp_zwp_timeout)
|
---|
| 1496 | {
|
---|
| 1497 | LWIP_UNUSED_ARG(_i);
|
---|
| 1498 | test_tcp_zwp_timeout_impl(0);
|
---|
| 1499 | }
|
---|
| 1500 | END_TEST
|
---|
| 1501 |
|
---|
| 1502 | START_TEST(test_tcp_zwp_timeout_link_down)
|
---|
| 1503 | {
|
---|
| 1504 | LWIP_UNUSED_ARG(_i);
|
---|
| 1505 | test_tcp_zwp_timeout_impl(1);
|
---|
| 1506 | }
|
---|
| 1507 | END_TEST
|
---|
| 1508 |
|
---|
| 1509 | START_TEST(test_tcp_persist_split)
|
---|
| 1510 | {
|
---|
| 1511 | struct netif netif;
|
---|
| 1512 | struct test_tcp_txcounters txcounters;
|
---|
| 1513 | struct test_tcp_counters counters;
|
---|
| 1514 | struct tcp_pcb *pcb;
|
---|
| 1515 | struct pbuf* p;
|
---|
| 1516 | err_t err;
|
---|
| 1517 | size_t i;
|
---|
| 1518 | LWIP_UNUSED_ARG(_i);
|
---|
| 1519 |
|
---|
| 1520 | /* Setup data for four segments */
|
---|
| 1521 | for (i = 0; i < 4 * TCP_MSS; i++) {
|
---|
| 1522 | tx_data[i] = (u8_t)i;
|
---|
| 1523 | }
|
---|
| 1524 |
|
---|
| 1525 | /* initialize local vars */
|
---|
| 1526 | test_tcp_init_netif(&netif, &txcounters, &test_local_ip, &test_netmask);
|
---|
| 1527 | memset(&counters, 0, sizeof(counters));
|
---|
| 1528 |
|
---|
| 1529 | /* create and initialize the pcb */
|
---|
| 1530 | tcp_ticks = SEQNO1 - ISS;
|
---|
| 1531 | pcb = test_tcp_new_counters_pcb(&counters);
|
---|
| 1532 | EXPECT_RET(pcb != NULL);
|
---|
| 1533 | tcp_set_state(pcb, ESTABLISHED, &test_local_ip, &test_remote_ip, TEST_LOCAL_PORT, TEST_REMOTE_PORT);
|
---|
| 1534 | pcb->mss = TCP_MSS;
|
---|
| 1535 | /* set window to three segments */
|
---|
| 1536 | pcb->cwnd = 3 * TCP_MSS;
|
---|
| 1537 | pcb->snd_wnd = 3 * TCP_MSS;
|
---|
| 1538 | pcb->snd_wnd_max = 3 * TCP_MSS;
|
---|
| 1539 |
|
---|
| 1540 | /* send four segments. Fourth should stay buffered and is a 3/4 MSS segment to
|
---|
| 1541 | get coverage on the oversized segment case */
|
---|
| 1542 | err = tcp_write(pcb, &tx_data[0], (3 * TCP_MSS) + (TCP_MSS - (TCP_MSS / 4)), TCP_WRITE_FLAG_COPY);
|
---|
| 1543 | EXPECT(err == ERR_OK);
|
---|
| 1544 | err = tcp_output(pcb);
|
---|
| 1545 | EXPECT(err == ERR_OK);
|
---|
| 1546 |
|
---|
| 1547 | /* verify 3 segments are in-flight */
|
---|
| 1548 | EXPECT(pcb->unacked != NULL);
|
---|
| 1549 | check_seqnos(pcb->unacked, 3, seqnos);
|
---|
| 1550 | EXPECT(txcounters.num_tx_calls == 3);
|
---|
| 1551 | EXPECT(txcounters.num_tx_bytes == 3 * (TCP_MSS + 40U));
|
---|
| 1552 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1553 | /* verify 4th segment is on unsent */
|
---|
| 1554 | EXPECT(pcb->unsent != NULL);
|
---|
| 1555 | EXPECT(pcb->unsent->len == TCP_MSS - (TCP_MSS / 4));
|
---|
| 1556 | check_seqnos(pcb->unsent, 1, &seqnos[3]);
|
---|
| 1557 | #if TCP_OVERSIZE
|
---|
| 1558 | EXPECT(pcb->unsent_oversize == TCP_MSS / 4);
|
---|
| 1559 | #if TCP_OVERSIZE_DBGCHECK
|
---|
| 1560 | EXPECT(pcb->unsent->oversize_left == pcb->unsent_oversize);
|
---|
| 1561 | #endif /* TCP_OVERSIZE_DBGCHECK */
|
---|
| 1562 | #endif /* TCP_OVERSIZE */
|
---|
| 1563 |
|
---|
| 1564 | /* ACK the 3 segments and update the window to only 1/2 TCP_MSS.
|
---|
| 1565 | 4th segment should stay on unsent because it's bigger than 1/2 MSS */
|
---|
| 1566 | p = tcp_create_rx_segment_wnd(pcb, NULL, 0, 0, 3 * TCP_MSS, TCP_ACK, TCP_MSS / 2);
|
---|
| 1567 | test_tcp_input(p, &netif);
|
---|
| 1568 | EXPECT(pcb->unacked == NULL);
|
---|
| 1569 | EXPECT(pcb->snd_wnd == TCP_MSS / 2);
|
---|
| 1570 | EXPECT(pcb->unsent != NULL);
|
---|
| 1571 | check_seqnos(pcb->unsent, 1, &seqnos[3]);
|
---|
| 1572 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 1573 | EXPECT(txcounters.num_tx_bytes == 0);
|
---|
| 1574 | /* persist timer should be started since 4th segment is stuck waiting on snd_wnd */
|
---|
| 1575 | EXPECT(pcb->persist_backoff == 1);
|
---|
| 1576 |
|
---|
| 1577 | /* ensure no errors have been recorded */
|
---|
| 1578 | EXPECT(counters.err_calls == 0);
|
---|
| 1579 | EXPECT(counters.last_err == ERR_OK);
|
---|
| 1580 |
|
---|
| 1581 | /* call tcp_timer some more times to let persist timer count up */
|
---|
| 1582 | for (i = 0; i < 4; i++) {
|
---|
| 1583 | test_tcp_tmr();
|
---|
| 1584 | EXPECT(txcounters.num_tx_calls == 0);
|
---|
| 1585 | EXPECT(txcounters.num_tx_bytes == 0);
|
---|
| 1586 | }
|
---|
| 1587 |
|
---|
| 1588 | /* this should be the first timer shot, which should split the
|
---|
| 1589 | * segment and send a runt (of the remaining window size) */
|
---|
| 1590 | txcounters.copy_tx_packets = 1;
|
---|
| 1591 | test_tcp_tmr();
|
---|
| 1592 | txcounters.copy_tx_packets = 0;
|
---|
| 1593 | /* persist will be disabled as RTO timer takes over */
|
---|
| 1594 | EXPECT(pcb->persist_backoff == 0);
|
---|
| 1595 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1596 | EXPECT(txcounters.num_tx_bytes == ((TCP_MSS /2) + 40U));
|
---|
| 1597 | /* verify 1/2 MSS segment sent, 1/4 MSS still buffered */
|
---|
| 1598 | EXPECT(pcb->unsent != NULL);
|
---|
| 1599 | EXPECT(pcb->unsent->len == TCP_MSS / 4);
|
---|
| 1600 | EXPECT(pcb->unacked != NULL);
|
---|
| 1601 | EXPECT(pcb->unacked->len == TCP_MSS / 2);
|
---|
| 1602 | #if TCP_OVERSIZE
|
---|
| 1603 | /* verify there is no oversized remaining since during the
|
---|
| 1604 | segment split, the remainder pbuf is always the exact length */
|
---|
| 1605 | EXPECT(pcb->unsent_oversize == 0);
|
---|
| 1606 | #if TCP_OVERSIZE_DBGCHECK
|
---|
| 1607 | /* Split segment already transmitted, should be at 0 */
|
---|
| 1608 | EXPECT(pcb->unacked->oversize_left == 0);
|
---|
| 1609 | /* Remainder segement should match pcb value (which is 0) */
|
---|
| 1610 | EXPECT(pcb->unsent->oversize_left == pcb->unsent_oversize);
|
---|
| 1611 | #endif /* TCP_OVERSIZE_DBGCHECK */
|
---|
| 1612 | #endif /* TCP_OVERSIZE */
|
---|
| 1613 |
|
---|
| 1614 | /* verify first half segment */
|
---|
| 1615 | EXPECT(txcounters.tx_packets != NULL);
|
---|
| 1616 | if (txcounters.tx_packets != NULL) {
|
---|
| 1617 | u8_t sent[TCP_MSS / 2];
|
---|
| 1618 | u16_t ret;
|
---|
| 1619 | ret = pbuf_copy_partial(txcounters.tx_packets, &sent, TCP_MSS / 2, 40U);
|
---|
| 1620 | EXPECT(ret == TCP_MSS / 2);
|
---|
| 1621 | EXPECT(memcmp(sent, &tx_data[3 * TCP_MSS], TCP_MSS / 2) == 0);
|
---|
| 1622 | }
|
---|
| 1623 | if (txcounters.tx_packets != NULL) {
|
---|
| 1624 | pbuf_free(txcounters.tx_packets);
|
---|
| 1625 | txcounters.tx_packets = NULL;
|
---|
| 1626 | }
|
---|
| 1627 | memset(&txcounters, 0, sizeof(txcounters));
|
---|
| 1628 |
|
---|
| 1629 | /* ACK the half segment, leave window at half segment */
|
---|
| 1630 | p = tcp_create_rx_segment_wnd(pcb, NULL, 0, 0, TCP_MSS / 2, TCP_ACK, TCP_MSS / 2);
|
---|
| 1631 | txcounters.copy_tx_packets = 1;
|
---|
| 1632 | test_tcp_input(p, &netif);
|
---|
| 1633 | txcounters.copy_tx_packets = 0;
|
---|
| 1634 | /* ensure remaining segment was sent */
|
---|
| 1635 | EXPECT(txcounters.num_tx_calls == 1);
|
---|
| 1636 | EXPECT(txcounters.num_tx_bytes == ((TCP_MSS / 4) + 40U));
|
---|
| 1637 | EXPECT(pcb->unsent == NULL);
|
---|
| 1638 | EXPECT(pcb->unacked != NULL);
|
---|
| 1639 | EXPECT(pcb->unacked->len == TCP_MSS / 4);
|
---|
| 1640 | EXPECT(pcb->snd_wnd == TCP_MSS / 2);
|
---|
| 1641 |
|
---|
| 1642 | /* verify remainder segment */
|
---|
| 1643 | EXPECT(txcounters.tx_packets != NULL);
|
---|
| 1644 | if (txcounters.tx_packets != NULL) {
|
---|
| 1645 | u8_t sent[TCP_MSS / 4];
|
---|
| 1646 | u16_t ret;
|
---|
| 1647 | ret = pbuf_copy_partial(txcounters.tx_packets, &sent, TCP_MSS / 4, 40U);
|
---|
| 1648 | EXPECT(ret == TCP_MSS / 4);
|
---|
| 1649 | EXPECT(memcmp(sent, &tx_data[(3 * TCP_MSS) + TCP_MSS / 2], TCP_MSS / 4) == 0);
|
---|
| 1650 | }
|
---|
| 1651 | if (txcounters.tx_packets != NULL) {
|
---|
| 1652 | pbuf_free(txcounters.tx_packets);
|
---|
| 1653 | txcounters.tx_packets = NULL;
|
---|
| 1654 | }
|
---|
| 1655 |
|
---|
| 1656 | /* ensure no errors have been recorded */
|
---|
| 1657 | EXPECT(counters.err_calls == 0);
|
---|
| 1658 | EXPECT(counters.last_err == ERR_OK);
|
---|
| 1659 |
|
---|
| 1660 | /* make sure the pcb is freed */
|
---|
| 1661 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 1);
|
---|
| 1662 | tcp_abort(pcb);
|
---|
| 1663 | EXPECT_RET(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
|
---|
| 1664 | }
|
---|
| 1665 | END_TEST
|
---|
| 1666 |
|
---|
| 1667 | /** Create the suite including all tests for this module */
|
---|
| 1668 | Suite *
|
---|
| 1669 | tcp_suite(void)
|
---|
| 1670 | {
|
---|
| 1671 | testfunc tests[] = {
|
---|
| 1672 | TESTFUNC(test_tcp_new_abort),
|
---|
| 1673 | TESTFUNC(test_tcp_listen_passive_open),
|
---|
| 1674 | TESTFUNC(test_tcp_recv_inseq),
|
---|
| 1675 | TESTFUNC(test_tcp_recv_inseq_trim),
|
---|
| 1676 | TESTFUNC(test_tcp_passive_close),
|
---|
| 1677 | TESTFUNC(test_tcp_active_abort),
|
---|
| 1678 | TESTFUNC(test_tcp_malformed_header),
|
---|
| 1679 | TESTFUNC(test_tcp_fast_retx_recover),
|
---|
| 1680 | TESTFUNC(test_tcp_fast_rexmit_wraparound),
|
---|
| 1681 | TESTFUNC(test_tcp_rto_rexmit_wraparound),
|
---|
| 1682 | TESTFUNC(test_tcp_tx_full_window_lost_from_unacked),
|
---|
| 1683 | TESTFUNC(test_tcp_tx_full_window_lost_from_unsent),
|
---|
| 1684 | TESTFUNC(test_tcp_retx_add_to_sent),
|
---|
| 1685 | TESTFUNC(test_tcp_rto_tracking),
|
---|
| 1686 | TESTFUNC(test_tcp_rto_timeout),
|
---|
| 1687 | TESTFUNC(test_tcp_rto_timeout_link_down),
|
---|
| 1688 | TESTFUNC(test_tcp_rto_timeout_syn_sent),
|
---|
| 1689 | TESTFUNC(test_tcp_rto_timeout_syn_sent_link_down),
|
---|
| 1690 | TESTFUNC(test_tcp_zwp_timeout),
|
---|
| 1691 | TESTFUNC(test_tcp_zwp_timeout_link_down),
|
---|
| 1692 | TESTFUNC(test_tcp_persist_split)
|
---|
| 1693 | };
|
---|
| 1694 | return create_suite("TCP", tests, sizeof(tests)/sizeof(testfunc), tcp_setup, tcp_teardown);
|
---|
| 1695 | }
|
---|