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kamailio/modules/ndb_redis/ndb_redis_mod.c

607 lines
13 KiB

/**
* $Id$
*
* Copyright (C) 2011 Daniel-Constantin Mierla (asipto.com)
*
* Copyright (C) 2012 Vicente Hernando Ara (System One: www.systemonenoc.com)
* - for: redis array reply support
*
* 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 <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include "../../sr_module.h"
#include "../../mem/mem.h"
#include "../../dprint.h"
#include "../../mod_fix.h"
#include "../../trim.h"
#include "redis_client.h"
MODULE_VERSION
/** parameters */
int redis_srv_param(modparam_t type, void *val);
int init_without_redis = 0;
static int w_redis_cmd3(struct sip_msg* msg, char* ssrv, char* scmd,
char* sres);
static int w_redis_cmd4(struct sip_msg* msg, char* ssrv, char* scmd,
char *sargv1, char* sres);
static int w_redis_cmd5(struct sip_msg* msg, char* ssrv, char* scmd,
char *sargv1, char *sargv2, char* sres);
static int w_redis_cmd6(struct sip_msg* msg, char* ssrv, char* scmd,
char *sargv1, char *sargv2, char *sargv3, char* sres);
static int fixup_redis_cmd6(void** param, int param_no);
static int w_redis_free_reply(struct sip_msg* msg, char* res);
static void mod_destroy(void);
static int child_init(int rank);
static int pv_get_redisc(struct sip_msg *msg, pv_param_t *param,
pv_value_t *res);
static int pv_parse_redisc_name(pv_spec_p sp, str *in);
static pv_export_t mod_pvs[] = {
{ {"redis", sizeof("redis")-1}, PVT_OTHER, pv_get_redisc, 0,
pv_parse_redisc_name, 0, 0, 0 },
{ {0, 0}, 0, 0, 0, 0, 0, 0, 0 }
};
static cmd_export_t cmds[]={
{"redis_cmd", (cmd_function)w_redis_cmd3, 3, fixup_redis_cmd6,
0, ANY_ROUTE},
{"redis_cmd", (cmd_function)w_redis_cmd4, 4, fixup_redis_cmd6,
0, ANY_ROUTE},
{"redis_cmd", (cmd_function)w_redis_cmd5, 5, fixup_redis_cmd6,
0, ANY_ROUTE},
{"redis_cmd", (cmd_function)w_redis_cmd6, 6, fixup_redis_cmd6,
0, ANY_ROUTE},
{"redis_free", (cmd_function)w_redis_free_reply, 1, fixup_spve_null,
0, ANY_ROUTE},
{0, 0, 0, 0, 0, 0}
};
static param_export_t params[]={
{"server", PARAM_STRING|USE_FUNC_PARAM, (void*)redis_srv_param},
{"init_without_redis", INT_PARAM, &init_without_redis},
{0, 0, 0}
};
struct module_exports exports = {
"ndb_redis",
DEFAULT_DLFLAGS, /* dlopen flags */
cmds,
params,
0,
0, /* exported MI functions */
mod_pvs, /* exported pseudo-variables */
0, /* extra processes */
0, /* module initialization function */
0, /* response function */
mod_destroy, /* destroy function */
child_init /* per child init function */
};
/* each child get a new connection to the database */
static int child_init(int rank)
{
/* skip child init for non-worker process ranks */
if (rank==PROC_INIT || rank==PROC_MAIN || rank==PROC_TCP_MAIN)
return 0;
if(redisc_init()<0)
{
LM_ERR("failed to initialize redis connections\n");
return -1;
}
return 0;
}
/**
*
*/
static void mod_destroy(void)
{
LM_DBG("cleaning up\n");
redisc_destroy();
}
/**
*
*/
static int w_redis_cmd3(struct sip_msg* msg, char* ssrv, char* scmd, char* sres)
{
str s[3];
if(fixup_get_svalue(msg, (gparam_t*)ssrv, &s[0])!=0)
{
LM_ERR("no redis server name\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)scmd, &s[1])!=0)
{
LM_ERR("no redis command\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)sres, &s[2])!=0)
{
LM_ERR("no redis reply name\n");
return -1;
}
if(redisc_exec(&s[0], &s[2], &s[1])<0)
return -1;
return 1;
}
/**
*
*/
static int w_redis_cmd4(struct sip_msg* msg, char* ssrv, char* scmd,
char *sargv1, char* sres)
{
str s[3];
str arg1;
char c1;
if(fixup_get_svalue(msg, (gparam_t*)ssrv, &s[0])!=0)
{
LM_ERR("no redis server name\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)scmd, &s[1])!=0)
{
LM_ERR("no redis command\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)sargv1, &arg1)!=0)
{
LM_ERR("no argument 1\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)sres, &s[2])!=0)
{
LM_ERR("no redis reply name\n");
return -1;
}
c1 = arg1.s[arg1.len];
arg1.s[arg1.len] = '\0';
if(redisc_exec(&s[0], &s[2], &s[1], arg1.s)<0) {
arg1.s[arg1.len] = c1;
return -1;
}
arg1.s[arg1.len] = c1;
return 1;
}
/**
*
*/
static int w_redis_cmd5(struct sip_msg* msg, char* ssrv, char* scmd,
char *sargv1, char *sargv2, char* sres)
{
str s[3];
str arg1, arg2;
char c1, c2;
if(fixup_get_svalue(msg, (gparam_t*)ssrv, &s[0])!=0)
{
LM_ERR("no redis server name\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)scmd, &s[1])!=0)
{
LM_ERR("no redis command\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)sargv1, &arg1)!=0)
{
LM_ERR("no argument 1\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)sargv2, &arg2)!=0)
{
LM_ERR("no argument 2\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)sres, &s[2])!=0)
{
LM_ERR("no redis reply name\n");
return -1;
}
c1 = arg1.s[arg1.len];
c2 = arg2.s[arg2.len];
arg1.s[arg1.len] = '\0';
arg2.s[arg2.len] = '\0';
if(redisc_exec(&s[0], &s[2], &s[1], arg1.s, arg2.s)<0) {
arg1.s[arg1.len] = c1;
arg2.s[arg2.len] = c2;
return -1;
}
arg1.s[arg1.len] = c1;
arg2.s[arg2.len] = c2;
return 1;
}
/**
*
*/
static int w_redis_cmd6(struct sip_msg* msg, char* ssrv, char* scmd,
char *sargv1, char *sargv2, char *sargv3, char* sres)
{
str s[3];
str arg1, arg2, arg3;
char c1, c2, c3;
if(fixup_get_svalue(msg, (gparam_t*)ssrv, &s[0])!=0)
{
LM_ERR("no redis server name\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)scmd, &s[1])!=0)
{
LM_ERR("no redis command\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)sargv1, &arg1)!=0)
{
LM_ERR("no argument 1\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)sargv2, &arg2)!=0)
{
LM_ERR("no argument 2\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)sargv3, &arg3)!=0)
{
LM_ERR("no argument 3\n");
return -1;
}
if(fixup_get_svalue(msg, (gparam_t*)sres, &s[2])!=0)
{
LM_ERR("no redis reply name\n");
return -1;
}
c1 = arg1.s[arg1.len];
c2 = arg2.s[arg2.len];
c3 = arg3.s[arg3.len];
arg1.s[arg1.len] = '\0';
arg2.s[arg2.len] = '\0';
arg3.s[arg3.len] = '\0';
if(redisc_exec(&s[0], &s[2], &s[1], arg1.s, arg2.s, arg3.s)<0) {
arg1.s[arg1.len] = c1;
arg2.s[arg2.len] = c2;
arg3.s[arg3.len] = c3;
return -1;
}
arg1.s[arg1.len] = c1;
arg2.s[arg2.len] = c2;
arg3.s[arg3.len] = c3;
return 1;
}
/**
*
*/
static int fixup_redis_cmd6(void** param, int param_no)
{
return fixup_spve_null(param, 1);
}
/**
*
*/
static int w_redis_free_reply(struct sip_msg* msg, char* res)
{
str name;
if(fixup_get_svalue(msg, (gparam_t*)res, &name)!=0)
{
LM_ERR("no redis reply name\n");
return -1;
}
if(redisc_free_reply(&name)<0)
return -1;
return 1;
}
/**
*
*/
int redis_srv_param(modparam_t type, void *val)
{
return redisc_add_server((char*)val);
}
/**
*
*/
int redis_parse_index(str *in, gparam_t *gp)
{
if(in->s[0]==PV_MARKER)
{
gp->type = GPARAM_TYPE_PVS;
gp->v.pvs = (pv_spec_t*)pkg_malloc(sizeof(pv_spec_t));
if (gp->v.pvs == NULL)
{
LM_ERR("no pkg memory left for pv_spec_t\n");
pkg_free(gp);
return -1;
}
if(pv_parse_spec(in, gp->v.pvs)==NULL)
{
LM_ERR("invalid PV identifier\n");
pkg_free(gp->v.pvs);
pkg_free(gp);
return -1;
}
} else {
gp->type = GPARAM_TYPE_INT;
if(str2sint(in, &gp->v.i) != 0)
{
LM_ERR("bad number <%.*s>\n", in->len, in->s);
return -1;
}
}
return 0;
}
/**
*
*/
int redis_parse_token(str *in, gparam_t *gp, int i)
{
str tok;
while(i<in->len && isspace(in->s[i]))
i++;
if(i>=in->len-2)
return -1;
if(in->s[i++]!='[')
return -1;
while(i<in->len-1 && isspace(in->s[i]))
i++;
if(i==in->len-1 || in->s[i]==']')
return -1;
tok.s = &(in->s[i]);
while(i<in->len && !isspace(in->s[i]) && in->s[i]!=']')
i++;
if(i==in->len)
return -1;
tok.len = &(in->s[i]) - tok.s;
if(redis_parse_index(&tok, gp)!=0)
return -1;
while(i<in->len && isspace(in->s[i]))
i++;
if(i==in->len || in->s[i]!=']')
return -1;
return 0;
}
/**
*
*/
static int pv_parse_redisc_name(pv_spec_p sp, str *in)
{
redisc_pv_t *rpv=NULL;
str pvs;
int i;
if(in->s==NULL || in->len<=0)
return -1;
rpv = (redisc_pv_t*)pkg_malloc(sizeof(redisc_pv_t));
if(rpv==NULL)
return -1;
memset(rpv, 0, sizeof(redisc_pv_t));
pvs = *in;
trim(&pvs);
rpv->rname.s = pvs.s;
for(i=0; i<pvs.len-2; i++)
{
if(isspace(pvs.s[i]) || pvs.s[i]=='=') {
rpv->rname.len = i;
break;
}
}
rpv->rname.len = i;
if(rpv->rname.len==0)
goto error_var;
while(i<pvs.len-2 && isspace(pvs.s[i]))
i++;
if(pvs.s[i]!='=')
goto error_var;
if(pvs.s[i+1]!='>')
goto error_var;
i += 2;
while(i<pvs.len && isspace(pvs.s[i]))
i++;
if(i>=pvs.len)
goto error_key;
rpv->rkey.s = pvs.s + i;
rpv->rkey.len = pvs.len - i;
/* Default pos param initialization. */
rpv->pos.type = GPARAM_TYPE_INT;
rpv->pos.v.i = -1;
if(rpv->rkey.len>=5 && strncmp(rpv->rkey.s, "value", 5)==0) {
rpv->rkeyid = 1;
if(rpv->rkey.len>5)
{
i+=5;
if(redis_parse_token(&pvs, &(rpv->pos), i)!=0)
goto error_key;
}
} else if(rpv->rkey.len>=4 && strncmp(rpv->rkey.s, "type", 4)==0) {
rpv->rkeyid = 0;
if(rpv->rkey.len>4)
{
i+=4;
if(redis_parse_token(&pvs, &(rpv->pos), i)!=0)
goto error_key;
}
} else if(rpv->rkey.len==4 && strncmp(rpv->rkey.s, "info", 4)==0) {
rpv->rkeyid = 2;
} else if(rpv->rkey.len==4 && strncmp(rpv->rkey.s, "size", 4)==0) {
rpv->rkeyid = 3;
} else {
goto error_key;
}
sp->pvp.pvn.u.dname = (void*)rpv;
sp->pvp.pvn.type = PV_NAME_OTHER;
return 0;
error_var:
LM_ERR("invalid var spec [%.*s]\n", in->len, in->s);
pkg_free(rpv);
return -1;
error_key:
LM_ERR("invalid key spec in [%.*s]\n", in->len, in->s);
pkg_free(rpv);
return -1;
}
/**
*
*/
static int pv_get_redisc(struct sip_msg *msg, pv_param_t *param,
pv_value_t *res)
{
redisc_pv_t *rpv;
str s;
int pos;
rpv = (redisc_pv_t*)param->pvn.u.dname;
if(rpv->reply==NULL)
{
rpv->reply = redisc_get_reply(&rpv->rname);
if(rpv->reply==NULL)
return pv_get_null(msg, param, res);
}
if(rpv->reply->rplRedis==NULL)
return pv_get_null(msg, param, res);
if(fixup_get_ivalue(msg, &rpv->pos, &pos)!=0)
return pv_get_null(msg, param, res);
switch(rpv->rkeyid) {
case 1:
/* value */
switch(rpv->reply->rplRedis->type) {
case REDIS_REPLY_STRING:
if(pos!=-1)
return pv_get_null(msg, param, res);
s.len = rpv->reply->rplRedis->len;
s.s = rpv->reply->rplRedis->str;
return pv_get_strval(msg, param, res, &s);
case REDIS_REPLY_INTEGER:
if(pos!=-1)
return pv_get_null(msg, param, res);
return pv_get_sintval(msg, param, res,
(int)rpv->reply->rplRedis->integer);
case REDIS_REPLY_ARRAY:
if(pos<0 || pos>=(int)rpv->reply->rplRedis->elements)
return pv_get_null(msg, param, res);
if(rpv->reply->rplRedis->element[pos]==NULL)
return pv_get_null(msg, param, res);
switch(rpv->reply->rplRedis->element[pos]->type) {
case REDIS_REPLY_STRING:
s.len = rpv->reply->rplRedis->element[pos]->len;
s.s = rpv->reply->rplRedis->element[pos]->str;
return pv_get_strval(msg, param, res, &s);
case REDIS_REPLY_INTEGER:
return pv_get_sintval(msg, param, res,
(int)rpv->reply->rplRedis->element[pos]->integer);
default:
return pv_get_null(msg, param, res);
}
default:
return pv_get_null(msg, param, res);
}
case 2:
/* info */
if(rpv->reply->rplRedis->str==NULL)
return pv_get_null(msg, param, res);
s.len = rpv->reply->rplRedis->len;
s.s = rpv->reply->rplRedis->str;
return pv_get_strval(msg, param, res, &s);
case 3:
/* size */
if(rpv->reply->rplRedis->type == REDIS_REPLY_ARRAY) {
return pv_get_uintval(msg, param, res, (unsigned int)rpv->reply->rplRedis->elements);
} else {
return pv_get_null(msg, param, res);
}
case 0:
/* type */
if(pos==-1)
return pv_get_sintval(msg, param, res,
rpv->reply->rplRedis->type);
if(rpv->reply->rplRedis->type != REDIS_REPLY_ARRAY)
return pv_get_null(msg, param, res);
if(pos<0 || pos>=(int)rpv->reply->rplRedis->elements)
return pv_get_null(msg, param, res);
if(rpv->reply->rplRedis->element[pos]==NULL)
return pv_get_null(msg, param, res);
return pv_get_sintval(msg, param, res, rpv->reply->rplRedis->element[pos]->type);
default:
/* We do nothing. */
return pv_get_null(msg, param, res);
}
}