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/*
* 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; }
vlib_error_desc_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
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