2 * Copyright (C) 2012-2013 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 3 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 #include <sys/socket.h>
25 #include <netinet/in.h>
26 #include <arpa/inet.h>
28 #include <gnutls/gnutls.h>
31 #include "rnet_message.h"
32 #include "rnet_encode.h"
34 static void * get_creds(char *certfile)
36 static gnutls_certificate_credentials_t cred;
37 gnutls_certificate_allocate_credentials(&cred);
38 gnutls_certificate_set_x509_trust_file(cred, certfile,
43 static void session_new(gnutls_session_t *session)
46 cred = get_creds("cert.pem");
47 gnutls_init(session, GNUTLS_CLIENT);
48 gnutls_set_default_priority(*session);
49 gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE, cred);
52 static int deflateRecord(char *buffer, size_t len, char **out, size_t *olen, int header)
56 zstrm.zalloc = Z_NULL;
58 zstrm.opaque = Z_NULL;
59 if ((r = deflateInit(&zstrm, Z_DEFAULT_COMPRESSION)) != Z_OK)
61 *out = malloc(len * 2 + 36);
66 zstrm.next_in = buffer;
68 zstrm.next_out = *out + 6;
69 zstrm.avail_out = len * 2 + 30;
70 while ((r = deflate(&zstrm, Z_FINISH)) != Z_STREAM_END &&
72 if ((r = deflate(&zstrm, Z_FINISH)) != Z_STREAM_END) {
77 *olen = zstrm.total_out + 6;
79 (*out)[1] = (zstrm.total_out >> 8);
80 (*out)[2] = (zstrm.total_out & 0xff);
81 (*out)[3] = (len >> 8);
82 (*out)[4] = (len & 0xff);
83 (*out)[5] = header ? 0x01 : 0x0;
88 static int inflateRecord(char *buffer, size_t len, char **out, size_t *olen)
92 zstrm.zalloc = Z_NULL;
94 zstrm.opaque = Z_NULL;
95 if ((r = inflateInit(&zstrm)) != Z_OK)
97 *olen = (buffer[3] << 8 | buffer[4]);
103 zstrm.next_in = buffer + 6;
104 zstrm.avail_in = len - 6;
105 zstrm.next_out = *out;
106 zstrm.avail_out = *olen;
107 while ((r = inflate(&zstrm, Z_FINISH)) != Z_STREAM_END &&
108 zstrm.avail_out > 0);
109 if ((r = inflate(&zstrm, Z_FINISH)) != Z_STREAM_END) {
118 #define RNET_ADDRESS "receitanet.receita.fazenda.gov.br"
120 static int connect_rnet(int *c)
122 struct addrinfo *addresses;
123 struct addrinfo *addr;
124 struct addrinfo hint;
125 struct sockaddr_in saddr;
129 memset(&hint, 0, sizeof(hint));
130 hint.ai_family = AF_UNSPEC;
131 hint.ai_socktype = SOCK_STREAM;
132 hint.ai_protocol = IPPROTO_TCP;
133 hint.ai_flags = AI_ADDRCONFIG;
134 r = getaddrinfo(RNET_ADDRESS, "3456", &hint, &addresses);
138 for (addr = addresses; addr != NULL; addr = addr->ai_next) {
139 fd = socket(addr->ai_family, addr->ai_socktype,
142 if (!(r = connect(fd, addr->ai_addr,
148 freeaddrinfo(addresses);
155 static int handshake(int c)
161 write(c, "00000000000000", 14);
162 r = read(c, buffer, 1);
163 if (r != 1 && buffer[0] != 'E')
165 r = read(c, buffer, 14);
171 static void usage(void)
173 fprintf(stderr, "rnetclient [filename]\n");
177 static int rnet_send(gnutls_session_t session, char *buffer, size_t len, int header)
181 deflateRecord(buffer, len, &out, &olen, header);
182 gnutls_record_send(session, out, olen);
187 static int rnet_recv(gnutls_session_t session, struct rnet_message **message)
194 rnet_message_expand(message, 6);
195 buffer = (*message)->buffer;
196 r = gnutls_record_recv(session, buffer, 6);
197 if (buffer[0] == 0x01) {
198 len = (buffer[1] << 8 | buffer[2]);
199 rnet_message_expand(message, len);
200 buffer = (*message)->buffer + 6;
201 r = gnutls_record_recv(session, buffer, len);
202 inflateRecord(buffer - 6, len + 6, &out, &olen);
203 rnet_message_del(*message);
205 rnet_message_expand(message, olen);
206 memcpy((*message)->buffer, out, olen);
207 (*message)->len = olen;
210 len = (buffer[1] << 8 | buffer[2]);
211 rnet_message_expand(message, len - 1);
212 buffer = (*message)->buffer + 6;
213 r = gnutls_record_recv(session, buffer, len - 1);
214 (*message)->len = len + 4;
215 rnet_message_strip(*message, 4);
220 static void save_rec_file(char *cpf, char *buffer, int len)
228 home = getenv("HOME");
230 tmpdir = getenv("TMPDIR");
235 fnlen = strlen(home) + strlen(cpf) + 13;
236 filename = malloc(fnlen);
237 snprintf(filename, fnlen, "%s/%s.REC.XXXXXX", home, cpf);
239 fd = mkstemp(filename);
241 fprintf(stderr, "Could not create receipt file: %s\n",
245 r = write(fd, buffer, len);
247 fprintf(stderr, "Could not write to receipt file%s%s\n",
249 r < 0 ? strerror(errno) : "");
252 fprintf(stderr, "Wrote the receipt to %s.\n", filename);
259 static void handle_response_text_and_file(char *cpf, struct rnet_message *message)
263 if (!rnet_message_parse(message, "texto", &value, &vlen))
264 fprintf(stderr, "%.*s\n", vlen, value);
265 if (!rnet_message_parse(message, "arquivo", &value, &vlen))
266 save_rec_file(cpf, value, vlen);
269 static void handle_response_already_found(char *cpf, struct rnet_message *message)
271 handle_response_text_and_file(cpf, message);
274 static void handle_response_error(struct rnet_message *message)
278 if (!rnet_message_parse(message, "texto", &value, &vlen))
279 fprintf(stderr, "%.*s\n", vlen, value);
280 fprintf(stderr, "Error transmiting DEC file.\n");
283 int main(int argc, char **argv)
287 struct rnet_decfile *decfile;
288 struct rnet_message *message = NULL;
289 gnutls_session_t session;
297 decfile = rnet_decfile_open(argv[1]);
299 fprintf(stderr, "could not parse %s: %s\n", argv[1], strerror(errno));
303 cpf = rnet_decfile_get_header_field(decfile, "cpf");
305 gnutls_global_init();
307 session_new(&session);
308 r = connect_rnet(&c);
310 fprintf(stderr, "error connecting to server: %s\n",
311 r == EAI_SYSTEM ? strerror(errno) : gai_strerror(r));
314 gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) c);
319 if ((r = gnutls_handshake(session)) < 0)
320 fprintf(stderr, "error in handshake: %s\n",
323 rnet_encode(decfile, &message);
324 rnet_send(session, message->buffer, message->len, 1);
325 rnet_message_del(message);
328 r = rnet_recv(session, &message);
329 if (r || !message || message->len == 0) {
330 fprintf(stderr, "error when receiving response\n");
333 switch (message->buffer[0]) {
334 case 1: /* go ahead */
335 handle_response_text_and_file(cpf, message);
338 handle_response_error(message);
342 handle_response_already_found(cpf, message);
347 handle_response_text_and_file(cpf, message);
351 rnet_message_del(message);
356 message = rnet_decfile_get_file(decfile);
357 rnet_send(session, message->buffer, message->len, 0);
360 r = rnet_recv(session, &message);
361 if (r || !message || message->len == 0) {
362 fprintf(stderr, "error when receiving response\n");
365 switch (message->buffer[0]) {
367 handle_response_error(message);
373 handle_response_text_and_file(cpf, message);
378 gnutls_bye(session, GNUTLS_SHUT_RDWR);
380 rnet_decfile_close(decfile);
381 gnutls_global_deinit();