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#include "ftp_decoder_inner.h"
#include "ftp_decoder_hash.h"
#include "ftp_decoder_util.h"
#include <MESA_htable.h>
#include <cstdint>
#include <arpa/inet.h>
static thread_local char __ftp_hash_string_buf[1024];
void ftp_declare_datalink_free(void *data)
{
struct ftp_context *fctx = (struct ftp_context *)data;
ftp_parse_result_free(&fctx->parse_result);
free(fctx);
}
static void ftp_declare_datalink_free_only_key(void *data)
{
return; // do nothing
}
int ftp_hash_add(void *handle, const void *key, u_int32_t key_len, void *value)
{
if (MESA_htable_add(handle, (const uint8_t *)key, key_len, value) < 0)
{
ftp_declare_datalink_free(value);
return -1;
}
return 0;
}
void ftp_hash_del(void *handle, const struct ftp_link_key *hkey)
{
const void *key;
u_int32_t key_len;
if (SESSION_ADDR_TYPE_IPV4_TCP == hkey->addr_type || SESSION_ADDR_TYPE_IPV4_UDP == hkey->addr_type)
{
key = &hkey->tuplev4;
key_len = sizeof(struct session_addr_ipv4);
}
else
{
key = &hkey->tuplev6;
key_len = sizeof(struct session_addr_ipv6);
}
MESA_htable_del(handle, (const uint8_t *)key, key_len, ftp_declare_datalink_free_only_key);
}
void ftp_make_hkey_v4(struct session_addr_ipv4 *keyv4, uint32_t sip_net, uint32_t dip_net, uint16_t dip_port_net)
{
memset(keyv4, 0, sizeof(struct session_addr_ipv4));
keyv4->saddr = sip_net;
keyv4->daddr = dip_net;
keyv4->sport = 0;
keyv4->dport = dip_port_net;
}
void ftp_make_hkey_v6(struct session_addr_ipv6 *keyv6, const struct in6_addr *sip, const struct in6_addr *dip, uint16_t dip_port_net)
{
memset(keyv6, 0, sizeof(struct session_addr_ipv6));
memcpy(keyv6->saddr, sip, IPV6_ADDR_LEN);
memcpy(keyv6->daddr, dip, IPV6_ADDR_LEN);
keyv6->sport = 0;
keyv6->dport = dip_port_net;
}
int ftp_build_hashkey_from_session(struct session *sess, struct ftp_link_key *hkey)
{
enum session_addr_type saddr_type;
struct session_addr *saddr = session_get0_addr(sess, &saddr_type);
hkey->addr_type = saddr_type;
if (SESSION_ADDR_TYPE_IPV4_TCP == saddr_type)
{
ftp_make_hkey_v4(&hkey->tuplev4, saddr->ipv4.saddr, saddr->ipv4.daddr, saddr->ipv4.dport);
}
else if (SESSION_ADDR_TYPE_IPV6_TCP == saddr_type)
{
ftp_make_hkey_v6(&hkey->tuplev6, (struct in6_addr *)saddr->ipv6.saddr, (struct in6_addr *)saddr->ipv6.daddr, saddr->ipv6.dport);
}
else
{
return -1;
}
return 0;
}
void *ftp_hash_search(void *handle, const struct ftp_link_key *hkey)
{
const void *key;
u_int32_t key_len;
if (SESSION_ADDR_TYPE_IPV4_TCP == hkey->addr_type || SESSION_ADDR_TYPE_IPV4_UDP == hkey->addr_type)
{
key = &hkey->tuplev4;
key_len = sizeof(struct session_addr_ipv4);
}
else
{
key = &hkey->tuplev6;
key_len = sizeof(struct session_addr_ipv6);
}
return MESA_htable_search(handle, (const uint8_t *)key, key_len);
}
const char *ftp_hash_key_to_str(const struct ftp_link_key *hkey)
{
char sip_str[INET6_ADDRSTRLEN], dip_str[INET6_ADDRSTRLEN];
unsigned short sport_host, dport_host;
if (SESSION_ADDR_TYPE_IPV4_TCP == hkey->addr_type || SESSION_ADDR_TYPE_IPV4_UDP == hkey->addr_type)
{
inet_ntop(AF_INET, &hkey->tuplev4.saddr, sip_str, INET_ADDRSTRLEN);
inet_ntop(AF_INET, &hkey->tuplev4.daddr, dip_str, INET_ADDRSTRLEN);
sport_host = ntohs(hkey->tuplev4.sport);
dport_host = ntohs(hkey->tuplev4.dport);
}
else
{
inet_ntop(AF_INET, hkey->tuplev6.saddr, sip_str, INET6_ADDRSTRLEN);
inet_ntop(AF_INET, hkey->tuplev6.daddr, dip_str, INET6_ADDRSTRLEN);
sport_host = ntohs(hkey->tuplev6.sport);
dport_host = ntohs(hkey->tuplev6.dport);
}
snprintf(__ftp_hash_string_buf, sizeof(__ftp_hash_string_buf), "%s:%u -> %s:%u", sip_str, sport_host, dip_str, dport_host);
return __ftp_hash_string_buf;
}
int ftp_hash_table_create(struct ftp_decoder_env *fenv)
{
int opt, opt_len;
fenv->data_link_table = (void **)calloc(fenv->thread_count, sizeof(void *));
for (int i = 0; i < fenv->thread_count; i++)
{
fenv->data_link_table[i] = MESA_htable_born();
assert(fenv->data_link_table[i]);
opt = 4096;
opt_len = sizeof(int);
MESA_htable_set_opt(fenv->data_link_table[i], MHO_HASH_SLOT_SIZE, &opt, opt_len);
opt = 0;
opt_len = sizeof(int);
MESA_htable_set_opt(fenv->data_link_table[i], MHO_THREAD_SAFE, &opt, opt_len);
opt = 0;
opt_len = sizeof(int);
MESA_htable_set_opt(fenv->data_link_table[i], MHO_SCREEN_PRINT_CTRL, &opt, opt_len);
opt = 10;
opt_len = sizeof(int);
MESA_htable_set_opt(fenv->data_link_table[i], MHO_EXPIRE_TIME, &opt, opt_len);
MESA_htable_set_opt(fenv->data_link_table[i], MHO_CBFUN_DATA_FREE, (void *)&ftp_declare_datalink_free, sizeof(void *));
MESA_htable_mature(fenv->data_link_table[i]);
}
return 0;
}
void ftp_hash_table_destroy(struct ftp_decoder_env *fenv)
{
unsigned int remain_items;
for (int i = 0; i < fenv->thread_count; i++)
{
remain_items = MESA_htable_get_elem_num(fenv->data_link_table[0]);
if (remain_items > 0)
{
ftp_runtime_log(RLOG_LV_DEBUG, "ftp_hash_table_destroy(): thread:%d declare datalink table remain items:%u\n", i, remain_items);
}
MESA_htable_destroy(fenv->data_link_table[i], ftp_declare_datalink_free);
}
free(fenv->data_link_table);
}
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