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Diffstat (limited to 'atinout.c')
| -rw-r--r-- | atinout.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/atinout.c b/atinout.c new file mode 100644 index 0000000..4801547 --- /dev/null +++ b/atinout.c @@ -0,0 +1,281 @@ +/* + * atinout + * + * This program takes AT commands as input, sends them to the modem and outputs + * the responses. + * + * Copyright (C) 2013 Håkon Løvdal <hlovdal@users.sourceforge.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 + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stdbool.h> +#include <errno.h> +#include <getopt.h> + +#define MAX_LINE_LENGTH (4 * 1024) +static char buf[MAX_LINE_LENGTH]; +static char buf2[MAX_LINE_LENGTH]; + +static struct option long_options[] = { + {"help", no_argument, NULL, 'h'}, + {"version", no_argument, NULL, 'V'}, + {"usage", no_argument, NULL, 0}, + {NULL, 0, NULL, 0} +}; +static const char *short_options = "hV"; + +static void usage(const char * const argv0) +{ + printf("Usage: %s <input_file> <modem_device> <output_file>\n", argv0); + printf("\n"); + printf("\t<input_file> is a file with AT commands to be executed. Value '-' means standard input.\n"); + printf("\t<input_file> is the device file for the modem (e.g. /dev/ttyACM0, /dev/ttyS0, etc).\n"); + printf("\t<output_file> is a file the responses to the AT commands are saved. Value '-' means standard output.\n"); + printf("\n"); + printf("In addition the program supports the following options:\n"); + printf("\n"); + printf("\t-h|--help\n"); + printf("\t-V|--version\n"); + printf("\t--usage\n"); + printf("\n"); +} + +static void help(const char * const argv0) +{ + printf("This program takes AT commands as input, sends them to the modem and outputs\n"); + printf("the responses.\n"); + printf("\n"); + printf("Example:\n"); + printf("\n"); + printf("$ echo 'AT+CPBS=\"ME\",\"ME\"; +CPBR=?' | %s - /dev/ttyACM0 -\n", argv0); + printf("AT+CPBS=\"ME\",\"ME\"; +CPBR=?\n"); + printf("\n"); + printf("+CPBR: (1-7000),80,62\n"); + printf("\n"); + printf("OK\n"); + printf("$\n"); + +} + +/* Replace '\n' with '\r', aka `tr '\012' '\015'` */ +static bool tr_lf_cr(const char *s) +{ + char *p; + p = strchr(s, '\n'); + if (p == NULL || p[1] != '\0') { + return false; + } + *p = '\r'; + return true; +} + +static void strip_cr(char *s) +{ + char *from, *to; + from = to = s; + while (*from != '\0') { + if (*from == '\r') { + from++; + continue; + } + *to++ = *from++; + } + *to = '\0'; +} + +static bool is_final_result(const char * const response) +{ +#define STARTS_WITH(a, b) ( strncmp((a), (b), strlen(b)) == 0) + switch (response[0]) { + case '+': + if (STARTS_WITH(&response[1], "CME ERROR:")) { + return true; + } + if (STARTS_WITH(&response[1], "CMS ERROR:")) { + return true; + } + return false; + case 'B': + if (strcmp(&response[1], "USY\r\n") == 0) { + return true; + } + return false; + + case 'E': + if (strcmp(&response[1], "RROR\r\n") == 0) { + return true; + } + return false; + case 'N': + if (strcmp(&response[1], "O ANSWER\r\n") == 0) { + return true; + } + if (strcmp(&response[1], "O CARRIER\r\n") == 0) { + return true; + } + if (strcmp(&response[1], "O DIALTONE\r\n") == 0) { + return true; + } + return false; + case 'O': + if (strcmp(&response[1], "K\r\n") == 0) { + return true; + } + /* no break */ + default: + return false; + } + +} + +int main(int argc, char *argv[]) +{ + FILE *atcmds; + FILE *modem; + FILE *output; + char *line; + bool success; + int res; + + while (true) { + int option_index = 0; + int c; + + c = getopt_long(argc, argv, short_options, long_options, &option_index); + if (c == -1) { + break; + } + switch (c) { + case 'h': + help(argv[0]); + return EXIT_SUCCESS; + case 'V': + printf("atinout version " VERSION "\n"); + if (argc == 2) { + printf("Copyright (C) 2013 Håkon Løvdal <hlovdal@users.sourceforge.net>\n" + "This program comes with ABSOLUTELY NO WARRANTY.\n" + "This is free software, and you are welcome to redistribute it under\n" + "certain conditions; see http://www.gnu.org/licenses/gpl.html for details.\n"); + return EXIT_SUCCESS; + } + break; + case 0: + if (strcmp("usage", long_options[option_index].name) == 0) { + usage(argv[0]); + return EXIT_SUCCESS; + } + break; + case '?': + break; + default: + fprintf(stderr, "getopt returned character code 0x%02x\n", (unsigned int)c); + } + } + + if ((argc - optind) != 3) { + usage(argv[0]); + return EXIT_FAILURE; + } + +#define INPUT_FILE argv[optind + 0] +#define MODEM_DEVICE argv[optind + 1] +#define OUTPUT_FILE argv[optind + 2] + + if (strcmp(INPUT_FILE, "-") == 0) { + atcmds = stdin; + } else { + atcmds = fopen(INPUT_FILE, "rb"); + if (atcmds == NULL) { + fprintf(stderr, "fopen(%s) failed: %s\n", INPUT_FILE, strerror(errno)); + return EXIT_FAILURE; + } + } + + modem = fopen(MODEM_DEVICE, "r+b"); + if (modem == NULL) { + fprintf(stderr, "fopen(%s) failed: %s\n", MODEM_DEVICE, strerror(errno)); + return EXIT_FAILURE; + } + + if (strcmp(OUTPUT_FILE, "-") == 0) { + output = stdout; + } else { + output = fopen(OUTPUT_FILE, "wb"); + if (output == NULL) { + fprintf(stderr, "fopen(%s) failed: %s\n", OUTPUT_FILE, strerror(errno)); + return EXIT_FAILURE; + } + } + + goto start; + while (line != NULL) { + success = tr_lf_cr(line); + if (! success) { + fprintf(stderr, "invalid string: '%s'\n", line); + return EXIT_FAILURE; + } + res = fputs(line, modem); + if (res < 0) { + fprintf(stderr, "failed to send '%s' to modem (res = %d)\n", line, res); + return EXIT_FAILURE; + } + do { + line = fgets(buf, (int)sizeof(buf), modem); + if (line == NULL) { + fprintf(stderr, "EOF from modem\n"); + return EXIT_FAILURE; + } + strcpy(buf2, line); + strip_cr(buf2); + res = fputs(buf2, output); + if (res < 0) { + fprintf(stderr, "failed to write '%s' to output file (res = %d)\n", buf2, res); + return EXIT_FAILURE; + } + } while (! is_final_result(line)); +start: + line = fgets(buf, (int)sizeof(buf), atcmds); + } + + if (strcmp(OUTPUT_FILE, "-") != 0) { + res = fclose(output); + if (res != 0) { + fprintf(stderr, "closing output failed: %s\n", strerror(errno)); + return EXIT_FAILURE; + } + } + res = fclose(modem); + if (res != 0) { + fprintf(stderr, "closing modem failed: %s\n", strerror(errno)); + return EXIT_FAILURE; + } + if (strcmp(INPUT_FILE, "-") != 0) { + res = fclose(atcmds); + if (res != 0) { + fprintf(stderr, "closing input failed: %s\n", strerror(errno)); + return EXIT_FAILURE; + } + } + return EXIT_SUCCESS; +} + |