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lrkproxy.c
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lrkproxy.c
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/*
* Copyright (C) 2003-2008 Sippy Software, Inc., http://www.sippysoft.com
* Copyright (C) 2020 Mojtaba Esfandiari.S, Nasim-Telecom
*
* This file is part of Kamailio, a free SIP server.
*
* Kamailio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
* Kamailio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#ifndef __USE_BSD
#define __USE_BSD
#endif
#include <netinet/ip.h>
#ifndef __FAVOR_BSD
#define __FAVOR_BSD
#endif
#include <netinet/udp.h>
#include <arpa/inet.h>
#include <sys/uio.h>
#include <sys/un.h>
#include <ctype.h>
#include <errno.h>
#include <netdb.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "../../core/flags.h"
#include "../../core/sr_module.h"
#include "../../core/dprint.h"
#include "../../core/data_lump.h"
#include "../../core/data_lump_rpl.h"
#include "../../core/error.h"
#include "../../core/forward.h"
#include "../../core/mem/mem.h"
#include "../../core/parser/parse_from.h"
#include "../../core/parser/parse_to.h"
#include "../../core/parser/parse_uri.h"
#include "../../core/parser/parser_f.h"
#include "../../core/parser/sdp/sdp.h"
#include "../../core/resolve.h"
#include "../../core/timer.h"
#include "../../core/trim.h"
#include "../../core/ut.h"
#include "../../core/pt.h"
#include "../../core/timer_proc.h"
#include "../../core/rpc.h"
#include "../../core/rpc_lookup.h"
#include "../../core/pvar.h"
#include "../../core/lvalue.h"
#include "../../core/msg_translator.h"
#include "../../core/usr_avp.h"
#include "../../core/socket_info.h"
#include "../../core/mod_fix.h"
#include "../../core/dset.h"
#include "../../core/route.h"
#include "../../core/kemi.h"
#include "../../modules/tm/tm_load.h"
#include "lrkproxy.h"
#include "lrkproxy_hash.h"
#include "lrkproxy_funcs.h"
MODULE_VERSION
#if !defined(AF_LOCAL)
#define AF_LOCAL AF_UNIX
#endif
#if !defined(PF_LOCAL)
#define PF_LOCAL PF_UNIX
#endif
///* NAT UAC test constants */
//#define NAT_UAC_TEST_C_1918 0x01
//#define NAT_UAC_TEST_RCVD 0x02
//#define NAT_UAC_TEST_V_1918 0x04
//#define NAT_UAC_TEST_S_1918 0x08
//#define NAT_UAC_TEST_RPORT 0x10
#define DEFAULT_LRKP_SET_ID 0
static str DEFAULT_LRKP_SET_ID_STR = str_init("0");
//#define RPC_DEFAULT_NATPING_STATE 1
#define RPC_MIN_RECHECK_TICKS 0
#define RPC_MAX_RECHECK_TICKS (unsigned int)-1
/* Supported version of the LRK proxy command protocol */
#define SUP_CPROTOVER "20190708"
/* Required additional version of the LRK proxy command protocol */
#define REQ_CPROTOVER "20190709"
/* Additional version necessary for re-packetization support */
#define REP_CPROTOVER "20190708"
#define PTL_CPROTOVER "20190708"
#define CPORT "22333"
#define HASH_SIZE 128
static char *gencookie();
static int lrkp_test(struct lrkp_node *);
static int lrkp_get_config(struct lrkp_node *node);
static int lrkp_keep_alive(struct lrkp_node *node);
static int lrkp_set_conntrack_rule(struct lrkproxy_hash_entry *e);
static int lrkp_remove_conntrack_rule(struct lrkproxy_hash_entry *e);
static int lrkproxy_force(struct sip_msg *msg, const char *flags,
enum lrk_operation op, int more);
static int lrkproxy_unforce(struct sip_msg *msg, const char *flags,
enum lrk_operation op, int more);
static int lrkproxy_manage0(struct sip_msg *msg, char *flags, char *ip);
static int lrkproxy_manage1(struct sip_msg *msg, char *flags, char *ip);
static int lrkproxy_manage2(struct sip_msg *msg, char *flags, char *ip);
static int change_media_sdp(sip_msg_t *msg, struct lrkproxy_hash_entry *e,
const char *flags, enum lrk_operation op);
static int add_lrkproxy_socks(struct lrkp_set *lrkp_list, char *lrkproxy);
static int fixup_set_id(void **param, int param_no);
static int set_lrkproxy_set_f(struct sip_msg *msg, char *str1, char *str2);
static struct lrkp_set *select_lrkp_set(int id_set);
static int lrkproxy_set_store(modparam_t type, void *val);
static int lrkproxy_add_lrkproxy_set(char *lrk_proxies);
static int mod_init(void);
static int child_init(int);
static void mod_destroy(void);
/* Pseudo-Variables */
//static int pv_get_lrkstat_f(struct sip_msg *, pv_param_t *, pv_value_t *);
static int lrkproxy_disable_tout = 60;
static int lrkproxy_retr = 5;
static int lrkproxy_tout = 1;
static pid_t mypid;
static unsigned int myseqn = 0;
//static str nolrkproxy_str = str_init("a=nolrkproxy:yes");
//static str extra_id_pv_param = {NULL, 0};
static char **lrkp_strings = 0;
static int lrkp_sets = 0; /*used in lrkproxy_set_store()*/
static int lrkp_set_count = 0;
static unsigned int current_msg_id = (unsigned int)-1;
/* LRK proxy balancing list */
struct lrkp_set_head *lrkp_set_list = 0;
struct lrkp_set *selected_lrkp_set = 0;
struct lrkp_set *default_lrkp_set = 0;
static struct lrkp_node *selected_lrkp_node = 0;
int lrkp_algorithm = LRK_LINER;
static int hash_table_size = 0;
static int hash_table_tout = 3600;
/*!< The gt is game-theory variable, It could be set 0:disable and 1:enable
* default is 0.
*/
static int gt = 0;
/*!< The behind_nat is used when the LRKProxy is behind nat and the external IP should be as Advertised IP.It could be set 0:disable and 1:enable
* default is 0.
*/
static int behind_nat = 0;
/*!< These option used to local rang ports to work with lrkproxy engine.
* Default values are based on lrkproxy engine.
*/
static int startport = 0;
static int endport = 0;
/*
* the custom_sdp_ip_spec variable is used for specific SDP information based $si (source address)
* */
static str custom_sdp_ip_spec = {NULL, 0};
pv_spec_t custom_sdp_ip_avp;
//static char *ice_candidate_priority_avp_param = NULL;
//static int ice_candidate_priority_avp_type;
//static int_str ice_candidate_priority_avp;
//static str lrk_inst_pv_param = {NULL, 0};
//static pv_spec_t *lrk_inst_pvar = NULL;
/* array with the sockets used by lrkproxy (per process)*/
static unsigned int lrkp_no = 0;
static int *lrkp_socks = 0;
typedef struct lrkp_set_link
{
struct lrkp_set *rset;
pv_spec_t *rpv;
} lrkp_set_link_t;
/* tm */
static struct tm_binds tmb;
/*0-> disabled, 1 ->enabled*/
//unsigned int *natping_state=0;
static cmd_export_t cmds[] = {
{"set_lrkproxy_set", (cmd_function)set_lrkproxy_set_f, 1, fixup_set_id,
0, ANY_ROUTE},
{"lrkproxy_manage", (cmd_function)lrkproxy_manage0, 0, 0, 0, ANY_ROUTE},
{"lrkproxy_manage", (cmd_function)lrkproxy_manage1, 1, fixup_spve_null,
fixup_free_spve_null, ANY_ROUTE},
{"lrkproxy_manage", (cmd_function)lrkproxy_manage2, 2, fixup_spve_spve,
fixup_free_spve_spve, ANY_ROUTE},
{0, 0, 0, 0, 0, 0}};
static param_export_t params[] = {
{"lrkproxy_sock", PARAM_STRING | USE_FUNC_PARAM,
(void *)lrkproxy_set_store},
{"lrkproxy_disable_tout", INT_PARAM, &lrkproxy_disable_tout},
{"lrkproxy_retr", INT_PARAM, &lrkproxy_retr},
{"lrkproxy_tout", INT_PARAM, &lrkproxy_tout},
{"lrkp_alg", INT_PARAM, &lrkp_algorithm},
{"hash_table_tout", INT_PARAM, &hash_table_tout},
{"hash_table_size", INT_PARAM, &hash_table_size},
{"custom_sdp_ip_avp", PARAM_STR, &custom_sdp_ip_spec},
{"gt", INT_PARAM, >}, {"behind_nat", INT_PARAM, &behind_nat},
{"start_port", INT_PARAM, &startport},
{"end_port", INT_PARAM, &endport},
{0, 0, 0}};
/** module exports */
struct module_exports exports = {
"lrkproxy", /* module name */
DEFAULT_DLFLAGS, /* dlopen flags */
cmds, /* cmd exports */
params, /* param exports */
0, /* RPC method exports */
0, /* exported pseudo-variables */
0, /* response handling function */
mod_init, /* module initialization function */
child_init, /* per-child init function */
mod_destroy /* module destroy function */
};
static int lrkproxy_set_store(modparam_t type, void *val)
{
char *p;
int len;
p = (char *)val;
if(p == 0 || *p == '\0') {
return 0;
}
if(lrkp_sets == 0) {
lrkp_strings = (char **)pkg_malloc(sizeof(char *));
if(!lrkp_strings) {
LM_ERR("no pkg memory left\n");
return -1;
}
} else { /*realloc to make room for the current set*/
lrkp_strings = (char **)pkg_reallocxf(
lrkp_strings, (lrkp_sets + 1) * sizeof(char *));
if(!lrkp_strings) {
LM_ERR("no pkg memory left\n");
return -1;
}
}
/*allocate for the current set of urls*/
len = strlen(p);
lrkp_strings[lrkp_sets] = (char *)pkg_malloc((len + 1) * sizeof(char));
if(!lrkp_strings[lrkp_sets]) {
LM_ERR("no pkg memory left\n");
return -1;
}
memcpy(lrkp_strings[lrkp_sets], p, len);
lrkp_strings[lrkp_sets][len] = '\0';
lrkp_sets++;
return 0;
}
struct lrkp_set *get_lrkp_set(str *const set_name)
{
unsigned int this_set_id;
struct lrkp_set *lrkp_list;
if(lrkp_set_list == NULL) {
LM_ERR("lrkp set list not configured\n");
return NULL;
}
/* Only integer set_names are valid at the moment */
if((set_name->s == NULL) || (set_name->len == 0)) {
LM_ERR("Invalid set name '%.*s'\n", set_name->len, set_name->s);
return NULL;
}
if(str2int(set_name, &this_set_id) < 0) {
LM_ERR("Invalid set name '%.*s' - must be integer\n", set_name->len,
set_name->s);
return NULL;
}
lrkp_list = select_lrkp_set(this_set_id);
if(lrkp_list == NULL) { /*if a new id_set : add a new set of lrkp*/
lrkp_list = shm_malloc(sizeof(struct lrkp_set));
if(!lrkp_list) {
LM_ERR("no shm memory left\n");
return NULL;
}
memset(lrkp_list, 0, sizeof(struct lrkp_set));
lrkp_list->id_set = this_set_id;
if(lrkp_set_list->lset_first == NULL) {
lrkp_set_list->lset_first = lrkp_list;
} else {
lrkp_set_list->lset_last->lset_next = lrkp_list;
}
lrkp_set_list->lset_last = lrkp_list;
lrkp_set_count++;
if(this_set_id == DEFAULT_LRKP_SET_ID) {
default_lrkp_set = lrkp_list;
}
}
return lrkp_list;
}
int insert_lrkp_node(struct lrkp_set *const lrkp_list, const str *const url,
const int weight, const int enable)
{
struct lrkp_node *pnode;
if((pnode = shm_malloc(sizeof(struct lrkp_node) + url->len + 1)) == NULL) {
LM_ERR("out of shm memory\n");
return -1;
}
memset(pnode, 0, sizeof(struct lrkp_node) + url->len + 1);
struct lrkp_node_conf *node_conf;
node_conf = shm_malloc(sizeof(struct lrkp_node_conf));
if(!node_conf) {
LM_ERR("out of shm memory\n");
return -1;
}
memset(node_conf, 0, sizeof(struct lrkp_node_conf));
pnode->lrkp_n_c = node_conf;
pnode->idx = lrkp_no++;
pnode->ln_weight = weight;
pnode->ln_umode = 0;
pnode->ln_enable = enable;
/* Permanently disable if marked as disabled */
// pnode->ln_recheck_ticks = disabled ? RPC_MAX_RECHECK_TICKS : 0;
pnode->ln_url.s = (char *)(pnode + 1);
memcpy(pnode->ln_url.s, url->s, url->len);
pnode->ln_url.len = url->len;
LM_DBG("url is '%.*s'\n", pnode->ln_url.len, pnode->ln_url.s);
/* Find protocol and store address */
pnode->ln_address = pnode->ln_url.s;
if(strncasecmp(pnode->ln_address, "udp:", 4) == 0) {
pnode->ln_umode = 1;
pnode->ln_address += 4;
} else if(strncasecmp(pnode->ln_address, "udp6:", 5) == 0) {
pnode->ln_umode = 6;
pnode->ln_address += 5;
} else if(strncasecmp(pnode->ln_address, "unix:", 5) == 0) {
pnode->ln_umode = 0;
pnode->ln_address += 5;
}
if(lrkp_list->ln_first == NULL) {
lrkp_list->ln_first = pnode;
} else {
lrkp_list->ln_last->ln_next = pnode;
}
lrkp_list->ln_last = pnode;
lrkp_list->lrkp_node_count++;
return 0;
}
static int add_lrkproxy_socks(struct lrkp_set *lrkp_list, char *lrkproxy)
{
/* Make lrk proxies list. */
char *p, *p1, *p2, *plim;
int weight;
str url;
p = lrkproxy;
plim = p + strlen(p);
for(;;) {
weight = 1;
while(*p && isspace((int)*p))
++p;
if(p >= plim)
break;
p1 = p;
while(*p && !isspace((int)*p))
++p;
if(p <= p1)
break; /* may happen??? */
/* Have weight specified? If yes, scan it */
p2 = memchr(p1, '=', p - p1);
if(p2 != NULL) {
weight = strtoul(p2 + 1, NULL, 10);
} else {
p2 = p;
}
url.s = p1;
url.len = (p2 - p1);
insert_lrkp_node(lrkp_list, &url, weight, 0);
}
return 0;
}
/* 0-success
* -1 - error
* */
static int lrkproxy_add_lrkproxy_set(char *lrk_proxies)
{
char *p, *p2;
struct lrkp_set *lrkp_list;
str id_set;
/* empty definition? */
p = lrk_proxies;
if(!p || *p == '\0') {
return 0;
}
for(; *p && isspace(*p); p++)
;
if(*p == '\0') {
return 0;
}
lrk_proxies = strstr(p, "==");
if(lrk_proxies) {
if(*(lrk_proxies + 2) == '\0') {
LM_ERR("script error -invalid lrk proxy list!\n");
return -1;
}
*lrk_proxies = '\0';
p2 = lrk_proxies - 1;
for(; isspace(*p2); *p2 = '\0', p2--)
;
id_set.s = p;
id_set.len = p2 - p + 1;
if(id_set.len <= 0) {
LM_ERR("script error -invalid set_id value!\n");
return -1;
}
lrk_proxies += 2;
} else {
lrk_proxies = p;
id_set = DEFAULT_LRKP_SET_ID_STR;
}
for(; *lrk_proxies && isspace(*lrk_proxies); lrk_proxies++)
;
if(!(*lrk_proxies)) {
LM_ERR("script error -empty lrkproxy list\n");
return -1;
;
}
lrkp_list = get_lrkp_set(&id_set);
if(lrkp_list == NULL) {
LM_ERR("Failed to get or create lrkp_list for '%.*s'\n", id_set.len,
id_set.s);
return -1;
}
if(add_lrkproxy_socks(lrkp_list, lrk_proxies) != 0) {
return -1;
}
return 0;
}
static int fixup_set_id(void **param, int param_no)
{
int int_val, err;
struct lrkp_set *lrkp_list;
lrkp_set_link_t *lrkl = NULL;
str s;
lrkl = (lrkp_set_link_t *)pkg_malloc(sizeof(lrkp_set_link_t));
if(lrkl == NULL) {
LM_ERR("no more pkg memory\n");
return -1;
}
memset(lrkl, 0, sizeof(lrkp_set_link_t));
s.s = (char *)*param;
s.len = strlen(s.s);
if(s.s[0] == PV_MARKER) {
int_val = pv_locate_name(&s);
if(int_val < 0 || int_val != s.len) {
LM_ERR("invalid parameter %s\n", s.s);
pkg_free(lrkl);
return -1;
}
lrkl->rpv = pv_cache_get(&s);
if(lrkl->rpv == NULL) {
LM_ERR("invalid pv parameter %s\n", s.s);
pkg_free(lrkl);
return -1;
}
} else {
int_val = str2s(*param, strlen(*param), &err);
if(err == 0) {
pkg_free(*param);
if((lrkp_list = select_lrkp_set(int_val)) == 0) {
LM_ERR("lrkp_proxy set %i not configured\n", int_val);
pkg_free(lrkl);
return E_CFG;
}
lrkl->rset = lrkp_list;
} else {
LM_ERR("bad number <%s>\n", (char *)(*param));
pkg_free(lrkl);
return E_CFG;
}
}
*param = (void *)lrkl;
return 0;
}
static int mod_init(void)
{
int i;
// pv_spec_t avp_spec;
// str s;
// unsigned short avp_flags;
// if(lrkproxy_rpc_init()<0)
// {
// LM_ERR("failed to register RPC commands\n");
// return -1;
// }
/* Configure the head of the lrkp_set_list */
lrkp_set_list = shm_malloc(sizeof(struct lrkp_set_head));
if(lrkp_set_list == NULL) {
LM_ERR("no shm memory for lrkp_set_list\n");
return -1;
}
memset(lrkp_set_list, 0, sizeof(struct lrkp_set_head));
/* storing the list of lrk proxy sets in shared memory*/
for(i = 0; i < lrkp_sets; i++) {
LM_DBG("Adding LRK-Proxy set %d/%d: %s\n", i, lrkp_sets,
lrkp_strings[i]);
// if ((lrkp_db_url.s == NULL) &&
if(lrkproxy_add_lrkproxy_set(lrkp_strings[i]) != 0) {
for(; i < lrkp_sets; i++)
if(lrkp_strings[i])
pkg_free(lrkp_strings[i]);
pkg_free(lrkp_strings);
LM_ERR("Failed to add LRK-Proxy from Config!\n");
return -1;
}
if(lrkp_strings[i])
pkg_free(lrkp_strings[i]);
}
if(lrkp_strings)
pkg_free(lrkp_strings);
/* init the hastable which keeps all the media address for both party and also the elected_node <--> callid& via-branch relation */
if(hash_table_size < 1) {
hash_table_size = HASH_SIZE; //the default size 128 entry.
}
if(!lrkproxy_hash_table_init(hash_table_size)) {
LM_ERR("lrkproxy_hash_table_init(%d) failed!\n", hash_table_size);
return -1;
} else {
// LM_DBG("lrkproxy_hash_table_init(%d) success!\n", hash_table_size);
LM_INFO(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>lrkproxy_hash_table_init(%d) "
"success!\n",
hash_table_size);
}
/* load tm module*/
if(load_tm_api(&tmb) < 0) {
LM_DBG("could not load the TM-functions - answer-offer model"
" auto-detection is disabled\n");
memset(&tmb, 0, sizeof(struct tm_binds));
}
if(custom_sdp_ip_spec.s) {
if(pv_parse_spec(&custom_sdp_ip_spec, &custom_sdp_ip_avp) == 0
&& (custom_sdp_ip_avp.type != PVT_AVP)) {
LM_ERR("malformed or non AVP custom_sdp_ip "
"AVP definition in '%.*s'\n",
custom_sdp_ip_spec.len, custom_sdp_ip_spec.s);
return -1;
}
}
init_custom_sdp_ip(custom_sdp_ip_spec.s ? &custom_sdp_ip_avp : 0);
return 0;
}
static int child_init(int rank)
{
int n;
char *cp;
struct addrinfo hints, *res;
struct lrkp_set *lrkp_list;
struct lrkp_node *pnode;
if(lrkp_set_list == NULL)
return 0;
/* do not init sockets for PROC_INIT and main process when fork=yes */
if(rank == PROC_INIT || (rank == PROC_MAIN && dont_fork == 0)) {
return 0;
}
/* Iterate known LRK proxies - create sockets */
mypid = getpid();
lrkp_socks = (int *)pkg_malloc(sizeof(int) * lrkp_no);
if(lrkp_socks == NULL) {
LM_ERR("no more pkg memory\n");
return -1;
}
memset(lrkp_socks, -1, sizeof(int) * lrkp_no);
for(lrkp_list = lrkp_set_list->lset_first; lrkp_list != 0;
lrkp_list = lrkp_list->lset_next) {
for(pnode = lrkp_list->ln_first; pnode != 0; pnode = pnode->ln_next) {
char *hostname;
if(pnode->ln_umode == 0) {
lrkp_socks[pnode->idx] = -1;
goto rptest;
}
/*
* This is UDP or UDP6. Detect host and port; lookup host;
* do connect() in order to specify peer address
*/
hostname = (char *)pkg_malloc(
sizeof(char) * (strlen(pnode->ln_address) + 1));
if(hostname == NULL) {
LM_ERR("no more pkg memory\n");
return -1;
}
strcpy(hostname, pnode->ln_address);
cp = strrchr(hostname, ':');
if(cp != NULL) {
*cp = '\0';
cp++;
}
if(cp == NULL || *cp == '\0')
cp = CPORT;
memset(&hints, 0, sizeof(hints));
hints.ai_flags = 0;
hints.ai_family = (pnode->ln_umode == 6) ? AF_INET6 : AF_INET;
hints.ai_socktype = SOCK_DGRAM;
if((n = getaddrinfo(hostname, cp, &hints, &res)) != 0) {
LM_ERR("%s\n", gai_strerror(n));
pkg_free(hostname);
return -1;
}
pkg_free(hostname);
lrkp_socks[pnode->idx] = socket(
(pnode->ln_umode == 6) ? AF_INET6 : AF_INET, SOCK_DGRAM, 0);
if(lrkp_socks[pnode->idx] == -1) {
LM_ERR("can't create socket\n");
freeaddrinfo(res);
return -1;
}
if(connect(lrkp_socks[pnode->idx], res->ai_addr, res->ai_addrlen)
== -1) {
LM_ERR("can't connect to a LRK proxy\n");
close(lrkp_socks[pnode->idx]);
lrkp_socks[pnode->idx] = -1;
freeaddrinfo(res);
return -1;
}
freeaddrinfo(res);
rptest:
pnode->ln_enable = lrkp_test(pnode);
if(pnode->ln_enable) { //get lrk proxy config if it is enable.
// LM_INFO("lrkp_test test is calling here\n"); //enable next line.
lrkp_get_config(pnode);
}
}
}
return 0;
}
static void mod_destroy(void)
{
struct lrkp_set *crt_list, *last_list;
struct lrkp_node *crt_lrkp, *last_lrkp;
/*free the shared memory*/
// if (natping_state)
// shm_free(natping_state);
if(lrkp_set_list == NULL)
return;
for(crt_list = lrkp_set_list->lset_first; crt_list != NULL;) {
for(crt_lrkp = crt_list->ln_first; crt_lrkp != NULL;) {
last_lrkp = crt_lrkp;
crt_lrkp = last_lrkp->ln_next;
shm_free(last_lrkp);
}
last_list = crt_list;
crt_list = last_list->lset_next;
shm_free(last_list);
}
shm_free(lrkp_set_list);
/* destroy the hash table */
if(!lrkproxy_hash_table_destroy()) {
LM_ERR("lrkproxy_hash_table_destroy() failed!\n");
} else {
LM_DBG("lrkproxy_hash_table_destroy() success!\n");
}
}
static char *gencookie(void)
{
static char cook[34];
sprintf(cook, "%d_%u ", (int)mypid, myseqn);
myseqn++;
return cook;
}
static int lrkp_test(struct lrkp_node *node)
{
int buflen = 256;
char buf[buflen];
struct iovec v[2] = {{NULL, 0}, {"P", 1}};
memset(buf, 0, buflen);
memcpy(buf, send_lrkp_command(node, v, 2, 0), buflen);
// if (buf == NULL) {
if(!buf[0]) {
LM_ERR("can't ping the lrk proxy %s, Disable it right now.\n",
node->ln_url.s);
return 0;
}
char *resp = buf + v[0].iov_len + v[1].iov_len + 1;
if(memcmp(resp, "PONG", 4) == 0)
// LM_DBG("Receive PONG response from lrk proxy server %s, Enable it right now.\n", node->ln_url.s);
LM_INFO("Receive PONG response from lrk proxy server %s, Enable it "
"right now.\n",
node->ln_url.s);
return 1;
}
static int lrkp_get_config(struct lrkp_node *node)
{
int buflen = 256;
char buf[buflen];
struct iovec v[2] = {{NULL, 0}, {"G", 1}};
struct lrkp_node_conf *lnconf = NULL;
memset(buf, 0, buflen);
memcpy(buf, send_lrkp_command(node, v, 2, 0), buflen);
// if (buf == NULL) {
if(!buf[0]) {
LM_ERR("can't get config of the lrk proxy %s, Disable it right now.\n",
node->ln_url.s);
return 0;
}
lnconf = (struct lrkp_node_conf *)(buf + v[0].iov_len + v[1].iov_len + 1);
if(lnconf == NULL) {
LM_ERR("can't get config of the lrk proxy %s, Disable it right now.\n",
node->ln_url.s);
return 0;
}
if(startport != 0 && endport != 0) {
lnconf->start_port = lnconf->current_port = startport;
lnconf->end_port = endport;
}
memcpy(node->lrkp_n_c, lnconf, sizeof(struct lrkp_node_conf));
// node->lrkp_n_c = lnconf;
LM_INFO("the lrk proxy %s is configured successfully right now.\n",
node->ln_url.s);
LM_INFO("buffer internal:%s\n", node->lrkp_n_c->internal_ip);
LM_INFO("buffer external:%s\n", node->lrkp_n_c->external_ip);
LM_INFO("buffer start_port:%d\n", node->lrkp_n_c->start_port);
LM_INFO("buffer end_port:%d\n", node->lrkp_n_c->end_port);
LM_INFO("buffer current_port:%d\n", node->lrkp_n_c->current_port);
return 1;
}
static int lrkp_keep_alive(struct lrkp_node *node)
{
int buflen = 256;
char buf[buflen];
struct iovec v[2] = {{NULL, 0}, {"G", 1}};
struct lrkp_node_conf *lnconf = NULL;
memset(buf, 0, buflen);
memcpy(buf, send_lrkp_command(node, v, 2, 0), buflen);
// if (buf == NULL) {
if(!buf[0]) {
LM_ERR("can't get config of the lrk proxy %s, Disable it right now.\n",
node->ln_url.s);
return 0;
}
lnconf = (struct lrkp_node_conf *)(buf + v[0].iov_len + v[1].iov_len + 1);
if(lnconf == NULL) {
LM_ERR("can't get config of the lrk proxy %s, Disable it right now.\n",
node->ln_url.s);
return 0;
}
// if(startport != 0 && endport != 0){
// lnconf->start_port = lnconf->current_port = startport;
// lnconf->end_port = endport;
// }
/*
if(startport != 0 && endport != 0){
//lnconf->start_port = lnconf->current_port = startport;
lnconf->start_port = lnconf->current_port = node->lrkp_n_c->current_port;
lnconf->end_port = endport;
}
memcpy(node->lrkp_n_c, lnconf, sizeof(struct lrkp_node_conf));
*/
// node->lrkp_n_c = lnconf;
LM_INFO("the lrk proxy %s is configured successfully right now.\n",
node->ln_url.s);
LM_INFO("buffer internal:%s\n", node->lrkp_n_c->internal_ip);
LM_INFO("buffer external:%s\n", node->lrkp_n_c->external_ip);
LM_INFO("buffer start_port:%d\n", node->lrkp_n_c->start_port);
LM_INFO("buffer end_port:%d\n", node->lrkp_n_c->end_port);
LM_INFO("buffer current_port:%d\n", node->lrkp_n_c->current_port);
return 1;
}
static int lrkp_set_conntrack_rule(struct lrkproxy_hash_entry *e)
{
int buflen = 254;
char buf[buflen];
int v_len = 0;
char src_ipv4[20];
char src_port[20];
char dst_ipv4[20];
char dst_port[20];
char snat_ipv4[20];
char snat_port[20];
char dnat_ipv4[20];
char dnat_port[20];
char timeout[20];
char callid[50];
struct iovec v[] = {
{NULL, 0}, /* reserved (cookie) */
{"S", 1}, /* command & common options */
{NULL, 0}, /* src_ipv4 */
{NULL, 0}, /* dst_ipnv4 */
{NULL, 0}, /* snat_ipv4 */
{NULL, 0}, /* dnat_ipv4 */
{NULL, 0}, /* src_port */
{NULL, 0}, /* dst_port*/
{NULL, 0}, /* snat_port */
{NULL, 0}, /* dnat_port*/
{NULL, 0}, /* timeout to clear conntrack entry*/
{NULL, 0}, /* callid of session */
};
v_len += v[1].iov_len;
//set src_ipv4 to buffer.
sprintf(src_ipv4, " %.*s ", e->src_ipv4.len, e->src_ipv4.s);
v[2].iov_base = src_ipv4;
v[2].iov_len = strlen(v[2].iov_base);
v_len += v[2].iov_len;
//set dst_ipv4 to buffer.
sprintf(dst_ipv4, "%.*s ", e->dst_ipv4.len, e->dst_ipv4.s);
v[3].iov_base = dst_ipv4;
v[3].iov_len = strlen(v[3].iov_base);
v_len += v[3].iov_len;
//set snat_ipv4 to buffer.
sprintf(snat_ipv4, "%.*s ", e->snat_ipv4.len, e->snat_ipv4.s);
v[4].iov_base = snat_ipv4;
v[4].iov_len = strlen(v[4].iov_base);
v_len += v[4].iov_len;
//set dnat_ipv4 to buffer.
sprintf(dnat_ipv4, "%.*s ", e->dnat_ipv4.len, e->dnat_ipv4.s);
v[5].iov_base = dnat_ipv4;
v[5].iov_len = strlen(v[5].iov_base);
v_len += v[5].iov_len;
//set src_port to buffer.
sprintf(src_port, "%.*s ", e->src_port.len, e->src_port.s);
v[6].iov_base = src_port;
v[6].iov_len = strlen(v[6].iov_base);
v_len += v[6].iov_len;
//set dst_port to buffer.
sprintf(dst_port, "%.*s ", e->dst_port.len, e->dst_port.s);
v[7].iov_base = dst_port;
v[7].iov_len = strlen(v[7].iov_base);
v_len += v[7].iov_len;
//set snat_port to buffer.
sprintf(snat_port, "%.*s ", e->snat_port.len, e->snat_port.s);
v[8].iov_base = snat_port;
v[8].iov_len = strlen(v[8].iov_base);
v_len += v[8].iov_len;
//set dnat_port to buffer.
sprintf(dnat_port, "%.*s ", e->dnat_port.len, e->dnat_port.s);
v[9].iov_base = dnat_port;
v[9].iov_len = strlen(v[9].iov_base);
v_len += v[9].iov_len;