summaryrefslogtreecommitdiffstats
path: root/src/plugins/nat/pnat/tests/pnat_test_stubs.h
blob: 1b7450146f5ede495b1f6980e2cafd7f0642c3d9 (plain)
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
214
215
216
217
218
219
220
221
222
223
224
225
226
/*
 * Copyright (c) 2021 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef included_pnat_test_stubs_h
#define included_pnat_test_stubs_h

void os_panic(void) {}
void os_exit(int code) {}
u32 ip4_fib_table_get_index_for_sw_if_index(u32 sw_if_index) { return 0; }
#include <vpp/stats/stat_segment.h>
clib_error_t *stat_segment_register_gauge(u8 *names,
                                          stat_segment_update_fn update_fn,
                                          u32 index) {
    return 0;
};
#include <vnet/feature/feature.h>
vnet_feature_main_t feature_main;
void classify_get_trace_chain(void){};

/* Format an IP4 address. */
u8 *format_ip4_address(u8 *s, va_list *args) {
    u8 *a = va_arg(*args, u8 *);
    return format(s, "%d.%d.%d.%d", a[0], a[1], a[2], a[3]);
}

u8 *format_pnat_match_tuple(u8 *s, va_list *args) { return 0; }
u8 *format_pnat_rewrite_tuple(u8 *s, va_list *args) { return 0; }

vl_counter_t pnat_error_counters[10];

int ip4_sv_reass_enable_disable_with_refcnt(u32 sw_if_index, int is_enable) {
    return 0;
}
int ip4_sv_reass_output_enable_disable_with_refcnt(u32 sw_if_index,
                                                   int is_enable) {
    return 0;
}
int vnet_feature_enable_disable(const char *arc_name, const char *node_name,
                                u32 sw_if_index, int enable_disable,
                                void *feature_config,
                                u32 n_feature_config_bytes) {
    return 0;
}
vnet_main_t *vnet_get_main(void) { return 0; }

/* Compute TCP/UDP/ICMP4 checksum in software. */
u16 ip4_tcp_udp_compute_checksum(vlib_main_t *vm, vlib_buffer_t *p0,
                                 ip4_header_t *ip0) {
    ip_csum_t sum0;
    u32 ip_header_length, payload_length_host_byte_order;

    /* Initialize checksum with ip header. */
    ip_header_length = ip4_header_bytes(ip0);
    payload_length_host_byte_order =
        clib_net_to_host_u16(ip0->length) - ip_header_length;
    sum0 = clib_host_to_net_u32(payload_length_host_byte_order +
                                (ip0->protocol << 16));

    if (BITS(uword) == 32) {
        sum0 = ip_csum_with_carry(sum0,
                                  clib_mem_unaligned(&ip0->src_address, u32));
        sum0 = ip_csum_with_carry(sum0,
                                  clib_mem_unaligned(&ip0->dst_address, u32));
    } else
        sum0 = ip_csum_with_carry(sum0,
                                  clib_mem_unaligned(&ip0->src_address, u64));
    return ip_calculate_l4_checksum(vm, p0, sum0,
                                    payload_length_host_byte_order, (u8 *)ip0,
                                    ip_header_length, NULL);
}

u32 ip4_tcp_udp_validate_checksum(vlib_main_t *vm, vlib_buffer_t *p0) {
    ip4_header_t *ip0 = vlib_buffer_get_current(p0);
    udp_header_t *udp0;
    u16 sum16;

    ASSERT(ip0->protocol == IP_PROTOCOL_TCP ||
           ip0->protocol == IP_PROTOCOL_UDP);

    udp0 = (void *)(ip0 + 1);
    if (ip0->protocol == IP_PROTOCOL_UDP && udp0->checksum == 0) {
        p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED |
                      VNET_BUFFER_F_L4_CHECKSUM_CORRECT);
        return p0->flags;
    }

    sum16 = ip4_tcp_udp_compute_checksum(vm, p0, ip0);

    p0->flags |= (VNET_BUFFER_F_L4_CHECKSUM_COMPUTED |
                  ((sum16 == 0) << VNET_BUFFER_F_LOG2_L4_CHECKSUM_CORRECT));

    return p0->flags;
}
u8 *format_tcp_header(u8 *s, va_list *args) {
    tcp_header_t *tcp = va_arg(*args, tcp_header_t *);
    u32 max_header_bytes = va_arg(*args, u32);
    u32 header_bytes;
    u32 indent;

    /* Nothing to do. */
    if (max_header_bytes < sizeof(tcp[0]))
        return format(s, "TCP header truncated");

    indent = format_get_indent(s);
    indent += 2;
    header_bytes = tcp_header_bytes(tcp);

    s = format(s, "TCP: %d -> %d", clib_net_to_host_u16(tcp->src),
               clib_net_to_host_u16(tcp->dst));

    s = format(s, "\n%Useq. 0x%08x ack 0x%08x", format_white_space, indent,
               clib_net_to_host_u32(tcp->seq_number),
               clib_net_to_host_u32(tcp->ack_number));

    s = format(s, "\n%Utcp header: %d bytes", format_white_space, indent,
               tcp->flags, header_bytes);

    s = format(s, "\n%Uwindow %d, checksum 0x%04x", format_white_space, indent,
               clib_net_to_host_u16(tcp->window),
               clib_net_to_host_u16(tcp->checksum));
    return s;
}
/* Format UDP header. */
u8 *format_udp_header(u8 *s, va_list *args) {
    udp_header_t *udp = va_arg(*args, udp_header_t *);
    u32 max_header_bytes = va_arg(*args, u32);
    u32 indent;

    /* Nothing to do. */
    if (max_header_bytes < sizeof(udp[0]))
        return format(s, "UDP header truncated");

    indent = format_get_indent(s);
    indent += 2;

    s = format(s, "UDP: %d -> %d", clib_net_to_host_u16(udp->src_port),
               clib_net_to_host_u16(udp->dst_port));

    s = format(s, "\n%Ulength %d, checksum 0x%04x", format_white_space, indent,
               clib_net_to_host_u16(udp->length),
               clib_net_to_host_u16(udp->checksum));

    return s;
}

/* Format an IP4 header. */
u8 *format_ip4_header(u8 *s, va_list *args) {
    ip4_header_t *ip = va_arg(*args, ip4_header_t *);
    u32 max_header_bytes = va_arg(*args, u32);
    u32 ip_version, header_bytes;
    u32 indent;

    /* Nothing to do. */
    if (max_header_bytes < sizeof(ip[0]))
        return format(s, "IP header truncated");

    indent = format_get_indent(s);
    indent += 2;

    ip_version = (ip->ip_version_and_header_length >> 4);
    header_bytes = (ip->ip_version_and_header_length & 0xf) * sizeof(u32);

    s = format(s, "%d: %U -> %U", ip->protocol, format_ip4_address,
               ip->src_address.data, format_ip4_address, ip->dst_address.data);

    /* Show IP version and header length only with unexpected values. */
    if (ip_version != 4 || header_bytes != sizeof(ip4_header_t))
        s = format(s, "\n%Uversion %d, header length %d", format_white_space,
                   indent, ip_version, header_bytes);

    s = format(s, "\n%Utos 0x%02x, ttl %d, length %d, checksum 0x%04x",
               format_white_space, indent, ip->tos, ip->ttl,
               clib_net_to_host_u16(ip->length),
               clib_net_to_host_u16(ip->checksum));

    /* Check and report invalid checksums. */
    {
        if (!ip4_header_checksum_is_valid(ip))
            s = format(s, " (should be 0x%04x)",
                       clib_net_to_host_u16(ip4_header_checksum(ip)));
    }

    {
        u32 f = clib_net_to_host_u16(ip->flags_and_fragment_offset);
        u32 o;

        s = format(s, "\n%Ufragment id 0x%04x", format_white_space, indent,
                   clib_net_to_host_u16(ip->fragment_id));

        /* Fragment offset. */
        o = 8 * (f & 0x1fff);
        f ^= f & 0x1fff;
        if (o != 0)
            s = format(s, " offset %d", o);

        if (f != 0) {
            s = format(s, ", flags ");
#define _(l)                                                                   \
    if (f & IP4_HEADER_FLAG_##l)                                               \
        s = format(s, #l);
            _(MORE_FRAGMENTS);
            _(DONT_FRAGMENT);
            _(CONGESTION);
#undef _
        }
        /* Fragment packet but not the first. */
        if (o != 0)
            return s;
    }

    return s;
}

#endif