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libsxmp/examples/sntld.c

308 lines
6.9 KiB
C

#include <stdio.h>
#define __USE_GNU
#include <stdlib.h>
#include <stdarg.h>
#include <sys/types.h>
#ifdef WIN32
#include <Winsock2.h>
#include <signal.h>
#include <ws2tcpip.h>
#else
#include <sys/select.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <sys/resource.h>
#include <netdb.h>
#include <unistd.h>
#include <uuid/uuid.h>
#include <execinfo.h>
#include <netinet/in.h>
#endif
#include <tdata/usrtc.h>
#include <sexpr/sexp.h>
#include <sntl/connection.h>
#include <pthread.h>
// #include <unistd.h>
#include <stdint.h>
#include <getopt.h>
#include <errno.h>
#ifndef WIN32
void signal_error(int sig, siginfo_t *si, void *ptr)
{
void* error_addr;
void* trace[16];
int x;
int trace_size;
char** messages;
fprintf(stderr, "Something is wrong: backtrace: \n");
uintptr_t fptr = (uintptr_t)(si->si_addr);
fprintf(stderr, "Signal: %d, function pointer: 0x%.12lX \n", sig, fptr);
#if __WORDSIZE == 64
error_addr = (void*)((ucontext_t*)ptr)->uc_mcontext.gregs[REG_RIP];
#else
error_addr = (void*)((ucontext_t*)ptr)->uc_mcontext.gregs[REG_EIP];
#endif
trace_size = backtrace(trace, 16);
trace[1] = error_addr;
messages = backtrace_symbols(trace, trace_size);
if (messages)
{
for (x = 1; x < trace_size; x++)
{
fprintf(stderr, "%s\n", messages[x]);
}
free(messages);
}
fprintf(stderr, "end of backtrace\n");
exit(1);
}
#endif
/* helper functions */
int __openlistener(int port)
{
int sd;
struct sockaddr_in addr;
sd = socket(PF_INET, SOCK_STREAM, 0);
bzero(&addr, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = INADDR_ANY;
if ( bind(sd, (struct sockaddr*)&addr, sizeof(addr)) != 0 ) {
perror("can't bind port");
abort();
}
if ( listen(sd, 10) != 0 ) {
perror("Can't configure listening port");
abort();
}
return sd;
}
/*
* Validation of the SSL certificate
* this function must be exist.
*/
static int __validate_sslpem(conn_t *co)
{
return 0;
}
/*
* validate - authorize user with password
*/
static int __secure_check(conn_t *co)
{
return 0;
}
/*
* typed list callback
*/
static int __set_typed_list_callback(conn_t *co, int ch, char *desc)
{
printf("allowed channel %d (%s)\n", ch, desc);
return 0;
}
/* list of rpc calls functions */
usrtc_t *fulist;
/* our fake */
usrtc_t *__rettlist(conn_t *c)
{
return fulist;
}
/* RPC functions implementation */
static int __ar_add(void *m, sexp_t *sx)
{
// int timout = rand() % 1000000;
// usleep(timout);
sexp_t *lsx = NULL, *sx_iter;
sxmsg_t *msg = (sxmsg_t *)m;
int idx, rc = 0;
if(sexp_list_cdr(sx, &lsx)) {
printf("Invalid protocol\n");
return EINVAL;
}
long int sum = 0;
SEXP_ITERATE_LIST(lsx, sx_iter, idx) {
if(!SEXP_IS_TYPE(sx_iter, SEXP_BASIC)) {
printf("Invalid value type\n");
return EINVAL;
}
sum += atoi(sx_iter->val);
}
rc = msg_return(msg, sum);
return rc;
}
static int __ar_multiply(void *data, sexp_t *sx)
{
sexp_t *lsx = NULL;
int idx;
sexp_t *sx_iter;
if(sexp_list_cdr(sx, &lsx)) {
printf("Invalid protocol\n");
return EINVAL;
}
long int mult = 0;
SEXP_ITERATE_LIST(lsx, sx_iter, idx) {
if(!SEXP_IS_TYPE(sx_iter, SEXP_BASIC)) {
printf("Invalid value type\n");
return EINVAL;
}
mult *= atoi(sx_iter->val);
}
char buf[128];
sprintf(buf, "(ar_mult_set (%ld))", mult);
printf("result %s\n", buf);
return 0;
}
/* define a little bit */
#define DEFAULT_PORT 13133
static void sigpipe_handler(int a)
{
return;
}
int main(int argc, char **argv)
{
// set detailed signal handler
// struct sigaction sigact, sigpipe;
// sigact.sa_flags = SA_SIGINFO;
// sigact.sa_sigaction = signal_error;
// sigemptyset(&sigact.sa_mask);
// sigaction(SIGFPE, &sigact, 0);
// sigaction(SIGILL, &sigact, 0);
// sigaction(SIGSEGV, &sigact, 0);
// sigaction(SIGBUS, &sigact, 0);
// memset(&sigpipe, 0, sizeof(struct sigaction));
// sigpipe.sa_handler = sigpipe_handler;
// sigaction(SIGPIPE, &sigpipe, NULL);
char *rootca = NULL, *cert = NULL;
int port = DEFAULT_PORT;
int opt;
while((opt = getopt(argc, argv, "p:r:u:")) != -1) {
switch(opt) {
case 'p':
port = atoi(optarg);
break;
case 'r':
rootca = strdup(optarg);
break;
case 'u':
cert = strdup(optarg);
break;
default:
fprintf(stderr, "usage: %s [-p <PORTNUM>] -r <PATH to Root CA> -u <PATH"
" to SSL certificate>\n", argv[0]);
return EINVAL;
}
}
if(!rootca) {
fprintf(stderr, "Root CA not pointed.\n Failure.\n");
return EINVAL;
}
if(!cert) {
fprintf(stderr, "User certificate not pointed.\n Failure.\n");
return EINVAL;
}
/* all is fine let's init connection subsystem */
opt = connections_subsystem_init();
if(opt) {
fprintf(stderr, "Subsystem init failed: %d\n", opt);
return opt;
}
/* set wroking certificates */
opt = connections_subsystem_setsslserts(rootca, cert, cert);
if(opt) {
fprintf(stderr, "Subsystem init failed (set SSL x.509 pems): %d\n", opt);
return opt;
}
/* clean up */
free(rootca);
free(cert);
/* set important callbacks to do the security checking */
connections_subsystem_set_securecheck(conn_sys, __secure_check);
connections_subsystem_set_sslvalidator(conn_sys, __validate_sslpem);
/* set a callback, it's optional and doesn't required in server side apps */
connections_subsystem_set_rpctlist_call(conn_sys, __set_typed_list_callback);
/* ok, now we need to construct RPC lists (channels) */
if(!(fulist = malloc(sizeof(usrtc_t)))) {
fprintf(stderr, "Cannot allocate memory for RPC lists\n Failure.\n");
return ENOMEM;
}
opt = sntl_rpclist_init(fulist);
if(opt) {
fprintf(stderr, "Failed to init rpc list\n Failure.\n");
return opt;
}
/* we will add one channel with type id 12 "Demo rpc list" */
opt = sntl_rpclist_add(fulist, 12, "Demo RPC list", NULL);
if(opt) {
fprintf(stderr, "Failed to add typed RPC channel\n Failure.\n");
return opt;
}
/* ok, let's add two functions */
opt = sntl_rpclist_add_function(fulist, 12, "ar-add", __ar_add);
if(opt) {
__fail:
fprintf(stderr, "Failed to add functions to typed RPC channel\n Failure.\n");
return opt;
}
opt = sntl_rpclist_add_function(fulist, 12, "ar-multiply", __ar_multiply);
if(opt) goto __fail;
/* ok, setup it */
connections_subsystem_setrpclist_function(__rettlist);
/* now we're ready to run the listen process */
int srv = __openlistener(port);
while(1) {
struct sockaddr_in addr;
socklen_t len = sizeof(addr);
conn_t *co = malloc(sizeof(conn_t));
int client = accept(srv, (struct sockaddr*)&addr, &len); /* accept connection as usual */
opt = connection_create(co, client); /* create connection, that's all */
if(opt) {
fprintf(stderr, "Cannot create connetion (%d)\n", opt);
}
}
return 0;
}