[457] | 1 | #include "tcp_helper.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 "lwip/pbuf.h"
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| 6 | #include "lwip/inet_chksum.h"
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| 7 | #include "lwip/ip_addr.h"
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| 8 |
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| 9 | #if !LWIP_STATS || !TCP_STATS || !MEMP_STATS
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| 10 | #error "This tests needs TCP- and MEMP-statistics enabled"
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| 11 | #endif
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| 12 |
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| 13 | const ip_addr_t test_local_ip = IPADDR4_INIT_BYTES(192, 168, 1, 1);
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| 14 | const ip_addr_t test_remote_ip = IPADDR4_INIT_BYTES(192, 168, 1, 2);
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| 15 | const ip_addr_t test_netmask = IPADDR4_INIT_BYTES(255, 255, 255, 0);
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| 16 |
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| 17 | /** Remove all pcbs on the given list. */
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| 18 | static void
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| 19 | tcp_remove(struct tcp_pcb* pcb_list)
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| 20 | {
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| 21 | struct tcp_pcb *pcb = pcb_list;
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| 22 | struct tcp_pcb *pcb2;
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| 23 |
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| 24 | while(pcb != NULL) {
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| 25 | pcb2 = pcb;
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| 26 | pcb = pcb->next;
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| 27 | tcp_abort(pcb2);
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| 28 | }
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| 29 | }
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| 30 |
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| 31 | /** Remove all pcbs on listen-, active- and time-wait-list (bound- isn't exported). */
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| 32 | void
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| 33 | tcp_remove_all(void)
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| 34 | {
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| 35 | tcp_remove(tcp_listen_pcbs.pcbs);
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| 36 | tcp_remove(tcp_bound_pcbs);
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| 37 | tcp_remove(tcp_active_pcbs);
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| 38 | tcp_remove(tcp_tw_pcbs);
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| 39 | fail_unless(MEMP_STATS_GET(used, MEMP_TCP_PCB) == 0);
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| 40 | fail_unless(MEMP_STATS_GET(used, MEMP_TCP_PCB_LISTEN) == 0);
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| 41 | fail_unless(MEMP_STATS_GET(used, MEMP_TCP_SEG) == 0);
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| 42 | fail_unless(MEMP_STATS_GET(used, MEMP_PBUF_POOL) == 0);
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| 43 | }
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| 44 |
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| 45 | /** Create a TCP segment usable for passing to tcp_input */
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| 46 | static struct pbuf*
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| 47 | tcp_create_segment_wnd(ip_addr_t* src_ip, ip_addr_t* dst_ip,
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| 48 | u16_t src_port, u16_t dst_port, void* data, size_t data_len,
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| 49 | u32_t seqno, u32_t ackno, u8_t headerflags, u16_t wnd)
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| 50 | {
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| 51 | struct pbuf *p, *q;
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| 52 | struct ip_hdr* iphdr;
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| 53 | struct tcp_hdr* tcphdr;
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| 54 | u16_t pbuf_len = (u16_t)(sizeof(struct ip_hdr) + sizeof(struct tcp_hdr) + data_len);
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| 55 | LWIP_ASSERT("data_len too big", data_len <= 0xFFFF);
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| 56 |
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| 57 | p = pbuf_alloc(PBUF_RAW, pbuf_len, PBUF_POOL);
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| 58 | EXPECT_RETNULL(p != NULL);
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| 59 | /* first pbuf must be big enough to hold the headers */
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| 60 | EXPECT_RETNULL(p->len >= (sizeof(struct ip_hdr) + sizeof(struct tcp_hdr)));
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| 61 | if (data_len > 0) {
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| 62 | /* first pbuf must be big enough to hold at least 1 data byte, too */
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| 63 | EXPECT_RETNULL(p->len > (sizeof(struct ip_hdr) + sizeof(struct tcp_hdr)));
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| 64 | }
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| 65 |
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| 66 | for(q = p; q != NULL; q = q->next) {
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| 67 | memset(q->payload, 0, q->len);
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| 68 | }
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| 69 |
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| 70 | iphdr = (struct ip_hdr*)p->payload;
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| 71 | /* fill IP header */
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| 72 | iphdr->dest.addr = ip_2_ip4(dst_ip)->addr;
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| 73 | iphdr->src.addr = ip_2_ip4(src_ip)->addr;
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| 74 | IPH_VHL_SET(iphdr, 4, IP_HLEN / 4);
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| 75 | IPH_TOS_SET(iphdr, 0);
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| 76 | IPH_LEN_SET(iphdr, htons(p->tot_len));
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| 77 | IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN));
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| 78 |
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| 79 | /* let p point to TCP header */
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| 80 | pbuf_header(p, -(s16_t)sizeof(struct ip_hdr));
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| 81 |
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| 82 | tcphdr = (struct tcp_hdr*)p->payload;
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| 83 | tcphdr->src = htons(src_port);
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| 84 | tcphdr->dest = htons(dst_port);
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| 85 | tcphdr->seqno = htonl(seqno);
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| 86 | tcphdr->ackno = htonl(ackno);
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| 87 | TCPH_HDRLEN_SET(tcphdr, sizeof(struct tcp_hdr)/4);
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| 88 | TCPH_FLAGS_SET(tcphdr, headerflags);
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| 89 | tcphdr->wnd = htons(wnd);
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| 90 |
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| 91 | if (data_len > 0) {
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| 92 | /* let p point to TCP data */
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| 93 | pbuf_header(p, -(s16_t)sizeof(struct tcp_hdr));
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| 94 | /* copy data */
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| 95 | pbuf_take(p, data, (u16_t)data_len);
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| 96 | /* let p point to TCP header again */
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| 97 | pbuf_header(p, sizeof(struct tcp_hdr));
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| 98 | }
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| 99 |
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| 100 | /* calculate checksum */
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| 101 |
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| 102 | tcphdr->chksum = ip_chksum_pseudo(p,
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| 103 | IP_PROTO_TCP, p->tot_len, src_ip, dst_ip);
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| 104 |
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| 105 | pbuf_header(p, sizeof(struct ip_hdr));
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| 106 |
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| 107 | return p;
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| 108 | }
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| 109 |
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| 110 | /** Create a TCP segment usable for passing to tcp_input */
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| 111 | struct pbuf*
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| 112 | tcp_create_segment(ip_addr_t* src_ip, ip_addr_t* dst_ip,
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| 113 | u16_t src_port, u16_t dst_port, void* data, size_t data_len,
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| 114 | u32_t seqno, u32_t ackno, u8_t headerflags)
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| 115 | {
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| 116 | return tcp_create_segment_wnd(src_ip, dst_ip, src_port, dst_port, data,
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| 117 | data_len, seqno, ackno, headerflags, TCP_WND);
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| 118 | }
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| 119 |
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| 120 | /** Create a TCP segment usable for passing to tcp_input
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| 121 | * - IP-addresses, ports, seqno and ackno are taken from pcb
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| 122 | * - seqno and ackno can be altered with an offset
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| 123 | */
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| 124 | struct pbuf*
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| 125 | tcp_create_rx_segment(struct tcp_pcb* pcb, void* data, size_t data_len, u32_t seqno_offset,
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| 126 | u32_t ackno_offset, u8_t headerflags)
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| 127 | {
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| 128 | return tcp_create_segment(&pcb->remote_ip, &pcb->local_ip, pcb->remote_port, pcb->local_port,
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| 129 | data, data_len, pcb->rcv_nxt + seqno_offset, pcb->lastack + ackno_offset, headerflags);
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| 130 | }
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| 131 |
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| 132 | /** Create a TCP segment usable for passing to tcp_input
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| 133 | * - IP-addresses, ports, seqno and ackno are taken from pcb
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| 134 | * - seqno and ackno can be altered with an offset
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| 135 | * - TCP window can be adjusted
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| 136 | */
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| 137 | struct pbuf* tcp_create_rx_segment_wnd(struct tcp_pcb* pcb, void* data, size_t data_len,
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| 138 | u32_t seqno_offset, u32_t ackno_offset, u8_t headerflags, u16_t wnd)
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| 139 | {
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| 140 | return tcp_create_segment_wnd(&pcb->remote_ip, &pcb->local_ip, pcb->remote_port, pcb->local_port,
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| 141 | data, data_len, pcb->rcv_nxt + seqno_offset, pcb->lastack + ackno_offset, headerflags, wnd);
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| 142 | }
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| 143 |
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| 144 | /** Safely bring a tcp_pcb into the requested state */
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| 145 | void
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| 146 | tcp_set_state(struct tcp_pcb* pcb, enum tcp_state state, const ip_addr_t* local_ip,
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| 147 | const ip_addr_t* remote_ip, u16_t local_port, u16_t remote_port)
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| 148 | {
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| 149 | u32_t iss;
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| 150 |
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| 151 | /* @todo: are these all states? */
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| 152 | /* @todo: remove from previous list */
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| 153 | pcb->state = state;
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| 154 |
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| 155 | iss = tcp_next_iss(pcb);
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| 156 | pcb->snd_wl2 = iss;
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| 157 | pcb->snd_nxt = iss;
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| 158 | pcb->lastack = iss;
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| 159 | pcb->snd_lbb = iss;
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| 160 |
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| 161 | if (state == ESTABLISHED) {
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| 162 | TCP_REG(&tcp_active_pcbs, pcb);
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| 163 | ip_addr_copy(pcb->local_ip, *local_ip);
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| 164 | pcb->local_port = local_port;
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| 165 | ip_addr_copy(pcb->remote_ip, *remote_ip);
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| 166 | pcb->remote_port = remote_port;
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| 167 | } else if(state == LISTEN) {
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| 168 | TCP_REG(&tcp_listen_pcbs.pcbs, pcb);
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| 169 | ip_addr_copy(pcb->local_ip, *local_ip);
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| 170 | pcb->local_port = local_port;
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| 171 | } else if(state == TIME_WAIT) {
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| 172 | TCP_REG(&tcp_tw_pcbs, pcb);
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| 173 | ip_addr_copy(pcb->local_ip, *local_ip);
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| 174 | pcb->local_port = local_port;
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| 175 | ip_addr_copy(pcb->remote_ip, *remote_ip);
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| 176 | pcb->remote_port = remote_port;
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| 177 | } else {
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| 178 | fail();
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| 179 | }
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| 180 | }
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| 181 |
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| 182 | void
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| 183 | test_tcp_counters_err(void* arg, err_t err)
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| 184 | {
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| 185 | struct test_tcp_counters* counters = (struct test_tcp_counters*)arg;
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| 186 | EXPECT_RET(arg != NULL);
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| 187 | counters->err_calls++;
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| 188 | counters->last_err = err;
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| 189 | }
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| 190 |
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| 191 | static void
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| 192 | test_tcp_counters_check_rxdata(struct test_tcp_counters* counters, struct pbuf* p)
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| 193 | {
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| 194 | struct pbuf* q;
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| 195 | u32_t i, received;
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| 196 | if(counters->expected_data == NULL) {
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| 197 | /* no data to compare */
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| 198 | return;
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| 199 | }
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| 200 | EXPECT_RET(counters->recved_bytes + p->tot_len <= counters->expected_data_len);
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| 201 | received = counters->recved_bytes;
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| 202 | for(q = p; q != NULL; q = q->next) {
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| 203 | char *data = (char*)q->payload;
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| 204 | for(i = 0; i < q->len; i++) {
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| 205 | EXPECT_RET(data[i] == counters->expected_data[received]);
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| 206 | received++;
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| 207 | }
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| 208 | }
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| 209 | EXPECT(received == counters->recved_bytes + p->tot_len);
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| 210 | }
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| 211 |
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| 212 | err_t
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| 213 | test_tcp_counters_recv(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err)
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| 214 | {
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| 215 | struct test_tcp_counters* counters = (struct test_tcp_counters*)arg;
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| 216 | EXPECT_RETX(arg != NULL, ERR_OK);
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| 217 | EXPECT_RETX(pcb != NULL, ERR_OK);
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| 218 | EXPECT_RETX(err == ERR_OK, ERR_OK);
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| 219 |
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| 220 | if (p != NULL) {
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| 221 | if (counters->close_calls == 0) {
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| 222 | counters->recv_calls++;
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| 223 | test_tcp_counters_check_rxdata(counters, p);
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| 224 | counters->recved_bytes += p->tot_len;
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| 225 | } else {
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| 226 | counters->recv_calls_after_close++;
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| 227 | counters->recved_bytes_after_close += p->tot_len;
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| 228 | }
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| 229 | pbuf_free(p);
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| 230 | } else {
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| 231 | counters->close_calls++;
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| 232 | }
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| 233 | EXPECT(counters->recv_calls_after_close == 0 && counters->recved_bytes_after_close == 0);
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| 234 | return ERR_OK;
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| 235 | }
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| 236 |
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| 237 | /** Allocate a pcb and set up the test_tcp_counters_* callbacks */
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| 238 | struct tcp_pcb*
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| 239 | test_tcp_new_counters_pcb(struct test_tcp_counters* counters)
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| 240 | {
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| 241 | struct tcp_pcb* pcb = tcp_new();
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| 242 | if (pcb != NULL) {
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| 243 | /* set up args and callbacks */
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| 244 | tcp_arg(pcb, counters);
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| 245 | tcp_recv(pcb, test_tcp_counters_recv);
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| 246 | tcp_err(pcb, test_tcp_counters_err);
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| 247 | pcb->snd_wnd = TCP_WND;
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| 248 | pcb->snd_wnd_max = TCP_WND;
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| 249 | }
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| 250 | return pcb;
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| 251 | }
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| 252 |
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| 253 | /** Calls tcp_input() after adjusting current_iphdr_dest */
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| 254 | void test_tcp_input(struct pbuf *p, struct netif *inp)
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| 255 | {
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| 256 | struct ip_hdr *iphdr = (struct ip_hdr*)p->payload;
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| 257 | /* these lines are a hack, don't use them as an example :-) */
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| 258 | ip_addr_copy_from_ip4(*ip_current_dest_addr(), iphdr->dest);
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| 259 | ip_addr_copy_from_ip4(*ip_current_src_addr(), iphdr->src);
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| 260 | ip_current_netif() = inp;
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| 261 | ip_data.current_ip4_header = iphdr;
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| 262 |
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| 263 | /* since adding IPv6, p->payload must point to tcp header, not ip header */
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| 264 | pbuf_header(p, -(s16_t)sizeof(struct ip_hdr));
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| 265 |
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| 266 | tcp_input(p, inp);
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| 267 |
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| 268 | ip_addr_set_zero(ip_current_dest_addr());
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| 269 | ip_addr_set_zero(ip_current_src_addr());
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| 270 | ip_current_netif() = NULL;
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| 271 | ip_data.current_ip4_header = NULL;
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| 272 | }
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| 273 |
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| 274 | static err_t test_tcp_netif_output(struct netif *netif, struct pbuf *p,
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| 275 | const ip4_addr_t *ipaddr)
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| 276 | {
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| 277 | struct test_tcp_txcounters *txcounters = (struct test_tcp_txcounters*)netif->state;
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| 278 | LWIP_UNUSED_ARG(ipaddr);
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| 279 | if (txcounters != NULL)
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| 280 | {
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| 281 | txcounters->num_tx_calls++;
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| 282 | txcounters->num_tx_bytes += p->tot_len;
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| 283 | if (txcounters->copy_tx_packets) {
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| 284 | struct pbuf *p_copy = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
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| 285 | err_t err;
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| 286 | EXPECT(p_copy != NULL);
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| 287 | err = pbuf_copy(p_copy, p);
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| 288 | EXPECT(err == ERR_OK);
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| 289 | if (txcounters->tx_packets == NULL) {
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| 290 | txcounters->tx_packets = p_copy;
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| 291 | } else {
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| 292 | pbuf_cat(txcounters->tx_packets, p_copy);
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| 293 | }
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| 294 | }
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| 295 | }
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| 296 | return ERR_OK;
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| 297 | }
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| 298 |
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| 299 | void test_tcp_init_netif(struct netif *netif, struct test_tcp_txcounters *txcounters,
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| 300 | const ip_addr_t *ip_addr, const ip_addr_t *netmask)
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| 301 | {
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| 302 | struct netif *n;
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| 303 | memset(netif, 0, sizeof(struct netif));
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| 304 | if (txcounters != NULL) {
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| 305 | memset(txcounters, 0, sizeof(struct test_tcp_txcounters));
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| 306 | netif->state = txcounters;
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| 307 | }
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| 308 | netif->output = test_tcp_netif_output;
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| 309 | netif->flags |= NETIF_FLAG_UP | NETIF_FLAG_LINK_UP;
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| 310 | ip_addr_copy_from_ip4(netif->netmask, *ip_2_ip4(netmask));
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| 311 | ip_addr_copy_from_ip4(netif->ip_addr, *ip_2_ip4(ip_addr));
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| 312 | for (n = netif_list; n != NULL; n = n->next) {
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| 313 | if (n == netif) {
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| 314 | return;
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| 315 | }
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| 316 | }
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| 317 | netif->next = NULL;
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| 318 | netif_list = netif;
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| 319 | }
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