app_mono_mod.c

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

#include "../../sr_module.h"
#include "../../dprint.h"
#include "../../ut.h"
#include "../../mod_fix.h"

#include "app_mono_api.h"

MODULE_VERSION

/* List of allowed chars for a prefix*/
static int  mod_init(void);
static void mod_destroy(void);
static int  child_init(int rank);

static int w_app_mono_exec(struct sip_msg *msg, char *script, char *mparam);
static int w_app_mono_run(struct sip_msg *msg, char *mparam, char *extra);

static int fixup_mono_exec(void** param, int param_no);

int app_mono_load_param(modparam_t type, void *val);
int app_mono_register_param(modparam_t type, void *val);

static param_export_t params[]={
        {"load",     STR_PARAM|USE_FUNC_PARAM, (void*)app_mono_load_param},
        {"register", STR_PARAM|USE_FUNC_PARAM, (void*)app_mono_register_param},
        {0, 0, 0}
};

static cmd_export_t cmds[]={
        {"mono_exec", (cmd_function)w_app_mono_exec, 1, fixup_mono_exec,
                0, ANY_ROUTE},
        {"mono_exec", (cmd_function)w_app_mono_exec, 2, fixup_mono_exec,
                0, ANY_ROUTE},
        {"mono_run",  (cmd_function)w_app_mono_run,  0, 0,
                0, ANY_ROUTE},
        {"mono_run", (cmd_function)w_app_mono_run,   1, fixup_spve_null,
                0, ANY_ROUTE},
        {0, 0, 0, 0, 0, 0}
};

struct module_exports exports = {
        "app_mono",
        RTLD_NOW | RTLD_GLOBAL, /* dlopen flags */
        cmds,
        params,
        0,
        0,              /* exported MI functions */
        0,              /* exported pseudo-variables */
        0,              /* extra processes */
        mod_init,       /* module initialization function */
        0,              /* response function */
        mod_destroy,    /* destroy function */
        child_init      /* per child init function */
};



static int mod_init(void)
{
        mono_sr_init_mod();
        return 0;
}


/* each child get a new connection to the database */
static int child_init(int rank)
{
        if(rank==PROC_MAIN || rank==PROC_TCP_MAIN)
                return 0; /* do nothing for the main process */

        if (rank==PROC_INIT)
        {
                /* do a probe before forking */
                if(mono_sr_init_probe()!=0)
                        return -1;
                return 0;
        }
        if(mono_sr_init_child()<0)
                return -1;
        if(mono_sr_init_load()<0)
                return -1;
        return 0;
}


static void mod_destroy(void)
{
        mono_sr_destroy();
}

char _mono_buf_stack[2][512];

static int w_app_mono_exec(struct sip_msg *msg, char *script, char *mparam)
{
        str s;
        str p;

        if(!mono_sr_initialized())
        {
                LM_ERR("Lua env not intitialized");
                return -1;
        }
        if(fixup_get_svalue(msg, (gparam_p)script, &s)<0)
        {
                LM_ERR("cannot get the script\n");
                return -1;
        }
        if(s.len>=511)
        {
                LM_ERR("script too long %d\n", s.len);
                return -1;
        }
        if(mparam!=NULL)
        {
                if(fixup_get_svalue(msg, (gparam_p)mparam, &p)<0)
                {
                        LM_ERR("cannot get the parameter\n");
                        return -1;
                }
                if(p.len>=511)
                {
                        LM_ERR("parameter value too long %d\n", p.len);
                        return -1;
                }
                memcpy(_mono_buf_stack[1], p.s, p.len);
                _mono_buf_stack[1][p.len] = '\0';
        }
        memcpy(_mono_buf_stack[0], s.s, s.len);
        _mono_buf_stack[0][s.len] = '\0';
        return app_mono_exec(msg, _mono_buf_stack[0],
                        (mparam)?_mono_buf_stack[1]:NULL);
}

static int w_app_mono_run(struct sip_msg *msg, char *mparam, char *extra)
{
        str p;

        if(!mono_sr_initialized())
        {
                LM_ERR("Lua env not intitialized");
                return -1;
        }
        if(mparam!=NULL)
        {
                if(fixup_get_svalue(msg, (gparam_p)mparam, &p)<0)
                {
                        LM_ERR("cannot get the parameter\n");
                        return -1;
                }
                if(p.len>=511)
                {
                        LM_ERR("parameter value too long %d\n", p.len);
                        return -1;
                }
                memcpy(_mono_buf_stack[0], p.s, p.len);
                _mono_buf_stack[0][p.len] = '\0';
        }
        return app_mono_run(msg, (mparam)?_mono_buf_stack[0]:NULL);
}


int app_mono_load_param(modparam_t type, void *val)
{
        if(val==NULL)
                return -1;
        return sr_mono_load_script((char*)val);
}

int app_mono_register_param(modparam_t type, void *val)
{
        if(val==NULL)
                return -1;
        return sr_mono_register_module((char*)val);
}

static int fixup_mono_exec(void** param, int param_no)
{
        if(sr_mono_assembly_loaded())
        {
                LM_ERR("cannot use lua_exec(...) when an assembly is loaded\n");
                return -1;
        }
        return fixup_spve_null(param, 1);
}