/*
- * Copyright (C) 2012-2013 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
+ * Copyright (C) 2012-2014 Thadeu Lima de Souza Cascardo <cascardo@minaslivre.org>
+ * Copyright (C) 2014 Alexandre Oliva <lxoliva@fsfla.org>
+ * Copyright (C) 2014 Sergio Durigan Junior <sergiodj@sergiodj.net>
*
* 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 <stdio.h>
#include <stdlib.h>
#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include <unistd.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <gnutls/gnutls.h>
#include <zlib.h>
+#include <argp.h>
+#include "config.h"
#include "decfile.h"
#include "rnet_message.h"
#include "rnet_encode.h"
+/* Program version and bug report address. */
+
+const char *argp_program_version = PACKAGE_VERSION;
+const char *argp_program_bug_address = PACKAGE_BUGREPORT;
+
+/* Documentation strings. */
+
+static const char rnetclient_doc[] =
+ "Send the Brazilian Income Tax Report to the Brazilian "
+ "Tax Authority";
+static const char rnetclient_args_doc[] =
+ "[-d|--declaration] FILE [-o|--output-dir DIRECTORY]";
+
+/* Description and definition of each option accepted by the program. */
+
+static const struct argp_option rnetclient_options_desc[] = {
+ { "declaration", 'd', "FILE", 0,
+ "The Income Tax Report file that will be sent.",
+ 0 },
+
+ { "output-dir", 'o', "DIRECTORY", 0,
+ "The directory where you wish to save the receipt.",
+ 0 },
+
+ { NULL },
+};
+
+struct rnetclient_args {
+ /* File representing the declaration. */
+ char *input_file;
+
+ /* Output directory to save the receipt. */
+ char *output_dir;
+};
+
+/* Parser for command line arguments. */
+
+static error_t rnetclient_parse_opt(int key, char *arg, struct argp_state *state)
+{
+ struct rnetclient_args *a = state->input;
+ switch (key) {
+ case 'd':
+ /* The user has explicitly provided a filename through
+ the '-d' switch. */
+ a->input_file = arg;
+ break;
+
+ case 'o':
+ a->output_dir = arg;
+ break;
+
+ case ARGP_KEY_ARG:
+ /* The user has possibly provided a filename without
+ using any switches (e.g., by running './rnetclient
+ file'). */
+ a->input_file = arg;
+ break;
+
+ case ARGP_KEY_END:
+ /* We have reached the end of the argument parsing.
+ Let's check if the user has provided a filename. */
+ if (a->input_file == NULL)
+ argp_error(state,
+ "You need to provide the Income Tax Declaration "
+ "filename.");
+ }
+
+ return 0;
+}
+
+/* Control struct used by argp. */
+
+static struct argp rnetclient_argp = {
+ rnetclient_options_desc,
+ rnetclient_parse_opt,
+ rnetclient_args_doc,
+ rnetclient_doc,
+ NULL, NULL, NULL
+};
+
+static size_t chars2len (unsigned char buf[2]) {
+ return (buf[0] << 8 | buf[1]);
+}
+
static void * get_creds(char *certfile)
{
static gnutls_certificate_credentials_t cred;
gnutls_credentials_set(*session, GNUTLS_CRD_CERTIFICATE, cred);
}
-static int deflateRecord(char *buffer, size_t len, char **out, size_t *olen)
+static int deflateRecord(char *buffer, size_t len, char **out, size_t *olen, int header)
{
z_stream zstrm;
int r;
free(*out);
return -1;
}
- *olen = zstrm.avail_out + 6;
+ *olen = zstrm.total_out + 6;
(*out)[0] = 0x1;
- (*out)[1] = (zstrm.avail_out >> 8);
- (*out)[2] = (zstrm.avail_out & 0xff);
+ (*out)[1] = (zstrm.total_out >> 8);
+ (*out)[2] = (zstrm.total_out & 0xff);
(*out)[3] = (len >> 8);
(*out)[4] = (len & 0xff);
- (*out)[5] = 0x1;
+ (*out)[5] = header ? 0x01 : 0x0;
deflateEnd(&zstrm);
return 0;
}
zstrm.opaque = Z_NULL;
if ((r = inflateInit(&zstrm)) != Z_OK)
return -1;
- *olen = (buffer[3] << 8 | buffer[4]);
+ *olen = chars2len(buffer+3);
*out = malloc(*olen);
if (!out) {
inflateEnd(&zstrm);
char buffer[16];
int r;
buffer[0] = 1;
- write(c, buffer, 1);
- write(c, "00000000000000", 14);
+ r = write(c, buffer, 1);
+ if (r < 1)
+ return -1;
+ r = write(c, "00000000000000", 14);
+ if (r < 14)
+ return -1;
r = read(c, buffer, 1);
if (r != 1 && buffer[0] != 'E')
return -1;
return 0;
}
-static void usage(void)
+static int rnet_send(gnutls_session_t session, char *buffer, size_t len, int header)
{
- fprintf(stderr, "rnetclient [filename]\n");
- exit(1);
-}
+ int r = 0;
+ /* Large files have to be uploaded as multiple
+ separately-deflated chunks, because the compressed and
+ uncompressed lengths in each record are encoded in unsigned
+ 16-bit integers each.
-static int rnet_send(gnutls_session_t session, char *buffer, size_t len)
-{
- char *out;
- size_t olen;
- deflateRecord(buffer, len, &out, &olen);
- gnutls_record_send(session, out, olen);
- free(out);
- return 0;
+ The header can't be split into multiple chunks, and it
+ should never have to, since it won't ever get even close to
+ 64KiB.
+
+ The uploaded file may be larger: to upload such large
+ files, it suffices to send multiple records till the entire
+ file is transferred, without waiting for a response. Since
+ we've alread informed the server of the file size in the
+ header, it knows exactly how much data to expect before
+ sending a response. It will only send an error message
+ before that if it times us out.
+
+ Odds are that any reasonably large size will do, but it
+ can't be too close to 64KiB, otherwise there won't be room
+ for the compressed length should it not compress well,
+ which should never happen for capital-ASCII-only
+ declaration files, but who knows?
+
+ This chunk size worked at the first try, uploading a
+ ~100KiB file, so let's stick with it. */
+ const int maxc = 64472;
+ if (header && len > maxc)
+ return -1;
+
+ do {
+ char *out = NULL;
+ size_t olen;
+ size_t clen = len < maxc ? len : maxc;
+ r = deflateRecord(buffer, clen, &out, &olen, header);
+ if (!r) {
+ size_t n = gnutls_record_send(session, out, olen);
+ if (n != olen)
+ r = -1;
+ }
+ free(out);
+ buffer += clen;
+ len -= clen;
+ } while (len && !r);
+ return r;
}
static int rnet_recv(gnutls_session_t session, struct rnet_message **message)
rnet_message_expand(message, 6);
buffer = (*message)->buffer;
r = gnutls_record_recv(session, buffer, 6);
- len = (buffer[1] << 8 | buffer[2]);
- rnet_message_expand(message, len);
- buffer = (*message)->buffer + 6;
- r = gnutls_record_recv(session, buffer, len);
- inflateRecord(buffer - 6, len + 6, &out, &olen);
- rnet_message_del(*message);
- *message = NULL;
- rnet_message_expand(message, olen);
- memcpy((*message)->buffer, out, olen);
- (*message)->len = olen;
- free(out);
+ if (buffer[0] == 0x01) {
+ len = chars2len(buffer+1);
+ rnet_message_expand(message, len);
+ buffer = (*message)->buffer + 6;
+ r = gnutls_record_recv(session, buffer, len);
+ inflateRecord(buffer - 6, len + 6, &out, &olen);
+ rnet_message_del(*message);
+ *message = NULL;
+ rnet_message_expand(message, olen);
+ memcpy((*message)->buffer, out, olen);
+ (*message)->len = olen;
+ free(out);
+ } else {
+ len = chars2len(buffer+1);
+ rnet_message_expand(message, len - 1);
+ buffer = (*message)->buffer + 6;
+ r = gnutls_record_recv(session, buffer, len - 1);
+ (*message)->len = len + 4;
+ rnet_message_strip(*message, 4);
+ }
return 0;
}
+static void save_rec_file(char *cpf, char *buffer, int len, const struct rnetclient_args *args)
+{
+ int fd;
+ char cwd[PATH_MAX];
+ char *path, *fname, *tmp;
+ size_t fname_len, r;
+ /* If the user provided the output directory where she wishes
+ to save the receipt, then we use it. Otherwise, we save
+ the file in the current working directory (CWD). */
+ if (args->output_dir == NULL)
+ path = getcwd(cwd, PATH_MAX);
+ else {
+ struct stat st;
+ if (stat(args->output_dir, &st) < 0) {
+ fprintf(stderr, "Could not stat directory \"%s\": %s\n", args->output_dir, strerror(errno));
+ return;
+ }
+ if (!S_ISDIR(st.st_mode)) {
+ fprintf(stderr, "Error: \"%s\" is a not a directory.\n", args->output_dir);
+ return;
+ }
+ path = args->output_dir;
+ }
+ /* Now it's time to decide which filename to write. We use
+ the declaration's filename as a base layout, because the
+ proprietary version of the IRPF program only recognizes
+ receipts if they have the same name as the declaration
+ files (disconsidering the extensions). For example, if the
+ declaration file is named "123.DEC", the receipt should be
+ named "123.REC". Therefore, if the declaration file has
+ the ".DEC" extension, we strip it out and add the ".REC".
+ Otherwise, we use the default template, which is to save
+ the receipt with the name "$CPF.REC". */
+ tmp = strstr(args->input_file, ".DEC");
+ if (tmp != NULL && tmp[sizeof(".DEC") - 1] == '\0') {
+ const char *p;
+ /* We found the ".REC" extension. */
+ p = strdup(args->input_file);
+ /* Replacing the ".DEC" by ".REC". Fortunately, we
+ just have to change one letter. */
+ tmp = strstr(p, ".DEC");
+ tmp[1] = 'R';
+ fname_len = strlen(p) + strlen(path) + 2;
+ fname = alloca(fname_len);
+ snprintf(fname, fname_len, "%s/%s", path, p);
+ } else {
+ /* The declaration filename does not follow the
+ convention, so we will not use it as a template.
+ We just generate a filename using "$CPF.REC". */
+ fname_len = strlen(cpf) + strlen(path) + sizeof(".REC") + 2;
+ fname = alloca(fname_len);
+ snprintf(fname, fname_len, "%s/%s.REC", path, cpf);
+ }
+ /* Now, open the file and write. */
+ fd = open(fname, O_CREAT | O_WRONLY | O_EXCL, S_IRUSR | S_IWUSR);
+ if (fd < 0) {
+ fprintf(stderr, "Could not create receipt file \"%s\": %s\n", fname, strerror(errno));
+ return;
+ }
+ do {
+ r = write(fd, buffer, len);
+ } while (r != len && errno == EAGAIN);
+ if (r != len)
+ fprintf(stderr, "Could not write to receipt file: %s", strerror(errno));
+ else
+ fprintf(stderr, "Wrote the receipt file to %s.\n", fname);
+ close(fd);
+}
+
+static void handle_response_text_and_file(char *cpf, struct rnet_message *message, const struct rnetclient_args *args)
+{
+ char *value;
+ int vlen;
+ if (!rnet_message_parse(message, "texto", &value, &vlen))
+ fprintf(stderr, "%.*s\n", vlen, value);
+ if (!rnet_message_parse(message, "arquivo", &value, &vlen))
+ save_rec_file(cpf, value, vlen, args);
+}
+
+static void handle_response_already_found(char *cpf, struct rnet_message *message, const struct rnetclient_args *args)
+{
+ handle_response_text_and_file(cpf, message, args);
+}
+
+static void handle_response_error(struct rnet_message *message)
+{
+ char *value;
+ int vlen;
+ if (!rnet_message_parse(message, "texto", &value, &vlen))
+ fprintf(stderr, "%.*s\n", vlen, value);
+ fprintf(stderr, "Error transmiting DEC file.\n");
+}
+
int main(int argc, char **argv)
{
int c;
int r;
struct rnet_decfile *decfile;
struct rnet_message *message = NULL;
+ struct rnetclient_args rnet_args;
gnutls_session_t session;
-
- if (argc < 2) {
- usage();
- }
+ int finish = 0;
+ char *cpf;
+ error_t err;
- decfile = rnet_decfile_open(argv[1]);
+ /* Parsing the command line arguments. The argp_parse
+ function calls exit() if there is some error during the
+ parsing process (e.g., the user has provided an unknown
+ flag or the parsing function has called argp_error).
+ However, if our internal parsing function returns something
+ different than zero, then argp_parse returns this value to
+ us. This is a bug, and should not happen in the current
+ state. */
+ memset(&rnet_args, 0, sizeof (rnet_args));
+ err = argp_parse (&rnetclient_argp, argc, argv, 0, NULL, &rnet_args);
+ if (err != 0)
+ fprintf(stderr, "internal error while parsing command line arguments.");
+
+ decfile = rnet_decfile_open(rnet_args.input_file);
if (!decfile) {
- fprintf(stderr, "could not parse %s: %s\n", argv[1], strerror(errno));
+ fprintf(stderr, "could not parse file \"%s\": %s\n", rnet_args.input_file, strerror(errno));
exit(1);
}
+ cpf = rnet_decfile_get_header_field(decfile, "cpf");
+
gnutls_global_init();
session_new(&session);
r == EAI_SYSTEM ? strerror(errno) : gai_strerror(r));
exit(1);
}
- gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t) c);
+ gnutls_transport_set_ptr(session, (gnutls_transport_ptr_t)(intptr_t) c);
r = handshake(c);
if (r < 0) {
exit(1);
gnutls_strerror(r));
rnet_encode(decfile, &message);
- rnet_send(session, message->buffer, message->len);
+ rnet_send(session, message->buffer, message->len, 1);
rnet_message_del(message);
message = NULL;
- rnet_recv(session, &message);
- write(1, message->buffer, message->len);
+ r = rnet_recv(session, &message);
+ if (r || !message || message->len == 0) {
+ fprintf(stderr, "error when receiving response\n");
+ goto out;
+ }
+ switch (message->buffer[0]) {
+ case 1: /* go ahead */
+ handle_response_text_and_file(cpf, message, &rnet_args);
+ break;
+ case 3: /* error */
+ handle_response_error(message);
+ finish = 1;
+ break;
+ case 4:
+ handle_response_already_found(cpf, message, &rnet_args);
+ finish = 1;
+ break;
+ case 2:
+ case 5:
+ handle_response_text_and_file(cpf, message, &rnet_args);
+ finish = 1;
+ break;
+ }
rnet_message_del(message);
+ if (finish)
+ goto out;
+
+ message = rnet_decfile_get_file(decfile);
+ rnet_send(session, message->buffer, message->len, 0);
+
+ message = NULL;
+ r = rnet_recv(session, &message);
+ if (r || !message || message->len == 0) {
+ fprintf(stderr, "error when receiving response\n");
+ goto out;
+ }
+ switch (message->buffer[0]) {
+ case 3: /* error */
+ handle_response_error(message);
+ break;
+ case 2:
+ case 4:
+ case 5:
+ case 1:
+ handle_response_text_and_file(cpf, message, &rnet_args);
+ break;
+ }
+
+out:
gnutls_bye(session, GNUTLS_SHUT_RDWR);
close(c);
rnet_decfile_close(decfile);
projects / cascardo / libreceita.git / blobdiff