/*
- * Copyright (C) 2012 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
+ * Copyright (C) 2012-2013 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
+#include <errno.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
+#include <netdb.h>
#include <gnutls/gnutls.h>
#include <zlib.h>
return 0;
}
-int main(int argc, char **argv)
+#define RNET_ADDRESS "receitanet.receita.fazenda.gov.br"
+
+static int connect_rnet(int *c)
{
+ struct addrinfo *addresses;
+ struct addrinfo *addr;
+ struct addrinfo hint;
struct sockaddr_in saddr;
- int c;
int r;
- char buffer[1024];
- char *out;
- size_t olen;
- gnutls_session_t session;
- gnutls_global_init();
- session_new(&session);
- c = socket(PF_INET, SOCK_STREAM, 0);
- saddr.sin_family = AF_INET;
- saddr.sin_port = htons(3456);
- saddr.sin_addr.s_addr = inet_addr("161.148.185.140");
- connect(c, (struct sockaddr *) &saddr, sizeof(saddr));
- gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) c);
+ int fd = *c = -1;
+ int i;
+ memset(&hint, 0, sizeof(hint));
+ hint.ai_family = AF_UNSPEC;
+ hint.ai_socktype = SOCK_STREAM;
+ hint.ai_protocol = IPPROTO_TCP;
+ hint.ai_flags = AI_ADDRCONFIG;
+ r = getaddrinfo(RNET_ADDRESS, "3456", &hint, &addresses);
+ if (r) {
+ return r;
+ }
+ for (addr = addresses; addr != NULL; addr = addr->ai_next) {
+ fd = socket(addr->ai_family, addr->ai_socktype,
+ addr->ai_protocol);
+ if (fd >= 0)
+ if (!(r = connect(fd, addr->ai_addr,
+ addr->ai_addrlen)))
+ break;
+ close(fd);
+ fd = -1;
+ }
+ freeaddrinfo(addresses);
+ *c = fd;
+ if (fd == -1)
+ return EAI_SYSTEM;
+ return 0;
+}
+
+static int handshake(int c)
+{
+ char buffer[16];
+ int r;
buffer[0] = 1;
write(c, buffer, 1);
write(c, "00000000000000", 14);
r = read(c, buffer, 1);
if (r != 1 && buffer[0] != 'E')
- exit(1);
+ return -1;
r = read(c, buffer, 14);
if (r != 14)
+ return -1;
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ int c;
+ int r;
+ char buffer[2048];
+ char *out;
+ size_t olen;
+ gnutls_session_t session;
+ gnutls_global_init();
+ session_new(&session);
+ r = connect_rnet(&c);
+ if (r) {
+ fprintf(stderr, "error connecting to server: %s\n",
+ r == EAI_SYSTEM ? strerror(errno) : gai_strerror(r));
exit(1);
+ }
+ gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) c);
+ r = handshake(c);
+ if (r < 0) {
+ exit(1);
+ }
if ((r = gnutls_handshake(session)) < 0)
fprintf(stderr, "error in handshake: %s\n",
gnutls_strerror(r));