1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
#include "tcp_helper.h"
#include "lwip/tcp_impl.h"
#include "lwip/stats.h"
#include "lwip/pbuf.h"
#include "lwip/inet_chksum.h"
#if !LWIP_STATS || !TCP_STATS || !MEMP_STATS
#error "This tests needs TCP- and MEMP-statistics enabled"
#endif
/** Remove all pcbs on the given list. */
static void
tcp_remove(struct tcp_pcb* pcb_list)
{
struct tcp_pcb *pcb = pcb_list;
struct tcp_pcb *pcb2;
while(pcb != NULL) {
pcb2 = pcb;
pcb = pcb->next;
tcp_abort(pcb2);
}
}
/** Remove all pcbs on listen-, active- and time-wait-list (bound- isn't exported). */
void
tcp_remove_all(void)
{
tcp_remove(tcp_listen_pcbs.pcbs);
tcp_remove(tcp_active_pcbs);
tcp_remove(tcp_tw_pcbs);
fail_unless(lwip_stats.memp[MEMP_TCP_PCB].used == 0);
fail_unless(lwip_stats.memp[MEMP_TCP_PCB_LISTEN].used == 0);
fail_unless(lwip_stats.memp[MEMP_TCP_SEG].used == 0);
fail_unless(lwip_stats.memp[MEMP_PBUF_POOL].used == 0);
}
/** Create a TCP segment usable for passing to tcp_input
* - IP-addresses, ports, seqno and ackno are taken from pcb
* - seqno and ackno can be altered with an offset
*/
struct pbuf*
tcp_create_rx_segment(struct tcp_pcb* pcb, void* data, size_t data_len, u32_t seqno_offset,
u32_t ackno_offset, u8_t headerflags)
{
return tcp_create_segment(&pcb->remote_ip, &pcb->local_ip, pcb->remote_port, pcb->local_port,
data, data_len, pcb->rcv_nxt + seqno_offset, pcb->snd_nxt + ackno_offset, headerflags);
}
/** Create a TCP segment usable for passing to tcp_input */
struct pbuf*
tcp_create_segment(ip_addr_t* src_ip, ip_addr_t* dst_ip,
u16_t src_port, u16_t dst_port, void* data, size_t data_len,
u32_t seqno, u32_t ackno, u8_t headerflags)
{
struct pbuf* p;
struct ip_hdr* iphdr;
struct tcp_hdr* tcphdr;
u16_t pbuf_len = (u16_t)(sizeof(struct ip_hdr) + sizeof(struct tcp_hdr) + data_len);
p = pbuf_alloc(PBUF_RAW, pbuf_len, PBUF_POOL);
EXPECT_RETNULL(p != NULL);
EXPECT_RETNULL(p->next == NULL);
memset(p->payload, 0, p->len);
iphdr = p->payload;
/* fill IP header */
iphdr->dest.addr = dst_ip->addr;
iphdr->src.addr = src_ip->addr;
IPH_VHLTOS_SET(iphdr, 4, IP_HLEN / 4, 0);
IPH_LEN_SET(iphdr, htons(p->tot_len));
IPH_CHKSUM_SET(iphdr, inet_chksum(iphdr, IP_HLEN));
pbuf_header(p, -(s16_t)sizeof(struct ip_hdr));
tcphdr = p->payload;
tcphdr->src = htons(src_port);
tcphdr->dest = htons(dst_port);
tcphdr->seqno = htonl(seqno);
tcphdr->ackno = htonl(ackno);
TCPH_HDRLEN_SET(tcphdr, sizeof(struct tcp_hdr)/4);
TCPH_FLAGS_SET(tcphdr, headerflags);
tcphdr->wnd = htons(TCP_WND);
/* copy data */
memcpy((char*)tcphdr + sizeof(struct tcp_hdr), data, data_len);
/* calculate checksum */
tcphdr->chksum = inet_chksum_pseudo(p, src_ip, dst_ip,
IP_PROTO_TCP, p->tot_len);
pbuf_header(p, sizeof(struct ip_hdr));
return p;
}
/** Safely bring a tcp_pcb into the requested state */
void
tcp_set_state(struct tcp_pcb* pcb, enum tcp_state state, ip_addr_t* local_ip,
ip_addr_t* remote_ip, u16_t local_port, u16_t remote_port)
{
/* @todo: are these all states? */
/* @todo: remove from previous list */
pcb->state = state;
if (state == ESTABLISHED) {
TCP_REG(&tcp_active_pcbs, pcb);
pcb->local_ip.addr = local_ip->addr;
pcb->local_port = local_port;
pcb->remote_ip.addr = remote_ip->addr;
pcb->remote_port = remote_port;
} else if(state == LISTEN) {
TCP_REG(&tcp_listen_pcbs.pcbs, pcb);
pcb->local_ip.addr = local_ip->addr;
pcb->local_port = local_port;
} else if(state == TIME_WAIT) {
TCP_REG(&tcp_tw_pcbs, pcb);
pcb->local_ip.addr = local_ip->addr;
pcb->local_port = local_port;
pcb->remote_ip.addr = remote_ip->addr;
pcb->remote_port = remote_port;
} else {
fail();
}
}
void
test_tcp_counters_err(void* arg, err_t err)
{
struct test_tcp_counters* counters = arg;
EXPECT_RET(arg != NULL);
counters->err_calls++;
counters->last_err = err;
}
static void
test_tcp_counters_check_rxdata(struct test_tcp_counters* counters, struct pbuf* p)
{
struct pbuf* q;
u32_t i, received;
if(counters->expected_data == NULL) {
/* no data to compare */
return;
}
EXPECT_RET(counters->recved_bytes + p->tot_len <= counters->expected_data_len);
received = counters->recved_bytes;
for(q = p; q != NULL; q = q->next) {
char *data = q->payload;
for(i = 0; i < q->len; i++) {
EXPECT_RET(data[i] == counters->expected_data[received]);
received++;
}
}
EXPECT(received == counters->recved_bytes + p->tot_len);
}
err_t
test_tcp_counters_recv(void* arg, struct tcp_pcb* pcb, struct pbuf* p, err_t err)
{
struct test_tcp_counters* counters = arg;
EXPECT_RETX(arg != NULL, ERR_OK);
EXPECT_RETX(pcb != NULL, ERR_OK);
EXPECT_RETX(err == ERR_OK, ERR_OK);
if (p != NULL) {
if (counters->close_calls == 0) {
counters->recv_calls++;
test_tcp_counters_check_rxdata(counters, p);
counters->recved_bytes += p->tot_len;
} else {
counters->recv_calls_after_close++;
counters->recved_bytes_after_close += p->tot_len;
}
pbuf_free(p);
} else {
counters->close_calls++;
}
EXPECT(counters->recv_calls_after_close == 0 && counters->recved_bytes_after_close == 0);
return ERR_OK;
}
/** Allocate a pcb and set up the test_tcp_counters_* callbacks */
struct tcp_pcb*
test_tcp_new_counters_pcb(struct test_tcp_counters* counters)
{
struct tcp_pcb* pcb = tcp_new();
if (pcb != NULL) {
/* set up args and callbacks */
tcp_arg(pcb, counters);
tcp_recv(pcb, test_tcp_counters_recv);
tcp_err(pcb, test_tcp_counters_err);
}
return pcb;
}
/** Calls tcp_input() after adjusting current_iphdr_dest */
void test_tcp_input(struct pbuf *p, struct netif *inp)
{
struct ip_hdr *iphdr = (struct ip_hdr*)p->payload;
ip_addr_copy(current_iphdr_dest, iphdr->dest);
ip_addr_copy(current_iphdr_src, iphdr->src);
current_netif = inp;
current_header = iphdr;
tcp_input(p, inp);
current_iphdr_dest.addr = 0;
current_iphdr_src.addr = 0;
current_netif = NULL;
current_header = NULL;
}
|
