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Diffstat (limited to 'src/mm-modem-helpers.c')
| -rw-r--r-- | src/mm-modem-helpers.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/mm-modem-helpers.c b/src/mm-modem-helpers.c new file mode 100644 index 0000000..1741b5f --- /dev/null +++ b/src/mm-modem-helpers.c @@ -0,0 +1,203 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * 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 2 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: + * + * Copyright (C) 2008 - 2009 Novell, Inc. + * Copyright (C) 2009 - 2010 Red Hat, Inc. + */ + +#include <glib.h> +#include <string.h> +#include <ctype.h> + +#include "mm-errors.h" +#include "mm-modem-helpers.h" + +static void +save_scan_value (GHashTable *hash, const char *key, GMatchInfo *info, guint32 num) +{ + char *quoted; + size_t len; + + g_return_if_fail (info != NULL); + + quoted = g_match_info_fetch (info, num); + if (!quoted) + return; + + len = strlen (quoted); + + /* Unquote the item if needed */ + if ((len >= 2) && (quoted[0] == '"') && (quoted[len - 1] == '"')) { + quoted[0] = ' '; + quoted[len - 1] = ' '; + quoted = g_strstrip (quoted); + } + + if (!strlen (quoted)) { + g_free (quoted); + return; + } + + g_hash_table_insert (hash, g_strdup (key), quoted); +} + +/* If the response was successfully parsed (even if no valid entries were + * found) the pointer array will be returned. + */ +GPtrArray * +mm_gsm_parse_scan_response (const char *reply, GError **error) +{ + /* Got valid reply */ + GPtrArray *results = NULL; + GRegex *r; + GMatchInfo *match_info; + GError *err = NULL; + gboolean umts_format = TRUE; + + g_return_val_if_fail (reply != NULL, NULL); + if (error) + g_return_val_if_fail (*error == NULL, NULL); + + if (!strstr (reply, "+COPS: ")) { + g_set_error_literal (error, + MM_MODEM_ERROR, MM_MODEM_ERROR_GENERAL, + "Could not parse scan results."); + return NULL; + } + + reply = strstr (reply, "+COPS: ") + 7; + + /* Cell access technology (GSM, UTRAN, etc) got added later and not all + * modems implement it. Some modesm have quirks that make it hard to + * use one regular experession for matching both pre-UMTS and UMTS + * responses. So try UMTS-format first and fall back to pre-UMTS if + * we get no UMTS-formst matches. + */ + + /* Quirk: Sony-Ericsson TM-506 sometimes includes a stray ')' like so, + * which is what makes it hard to match both pre-UMTS and UMTS in + * the same regex: + * + * +COPS: (2,"","T-Mobile","31026",0),(1,"AT&T","AT&T","310410"),0) + */ + + r = g_regex_new ("\\((\\d),([^,\\)]*),([^,\\)]*),([^,\\)]*)[\\)]?,(\\d)\\)", G_REGEX_UNGREEDY, 0, NULL); + if (err) { + g_error ("Invalid regular expression: %s", err->message); + g_error_free (err); + g_set_error_literal (error, + MM_MODEM_ERROR, MM_MODEM_ERROR_GENERAL, + "Could not parse scan results."); + return NULL; + } + + /* If we didn't get any hits, try the pre-UMTS format match */ + if (!g_regex_match (r, reply, 0, &match_info)) { + g_regex_unref (r); + if (match_info) { + g_match_info_free (match_info); + match_info = NULL; + } + + /* Pre-UMTS format doesn't include the cell access technology after + * the numeric operator element. + * + * Ex: Motorola C-series (BUSlink SCWi275u) like so: + * + * +COPS: (2,"T-Mobile","","310260"),(0,"Cingular Wireless","","310410") + */ + + /* Quirk: Some Nokia phones (N80) don't send the quotes for empty values: + * + * +COPS: (2,"T - Mobile",,"31026"),(1,"Einstein PCS",,"31064"),(1,"Cingular",,"31041"),,(0,1,3),(0,2) + */ + + r = g_regex_new ("\\((\\d),([^,\\)]*),([^,\\)]*),([^\\)]*)\\)", G_REGEX_UNGREEDY, 0, NULL); + if (err) { + g_error ("Invalid regular expression: %s", err->message); + g_error_free (err); + g_set_error_literal (error, + MM_MODEM_ERROR, MM_MODEM_ERROR_GENERAL, + "Could not parse scan results."); + return NULL; + } + + g_regex_match (r, reply, 0, &match_info); + umts_format = FALSE; + } + + /* Parse the results */ + results = g_ptr_array_new (); + while (g_match_info_matches (match_info)) { + GHashTable *hash; + char *access_tech = NULL; + const char *tmp; + gboolean valid = FALSE; + + hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free); + + save_scan_value (hash, MM_SCAN_TAG_STATUS, match_info, 1); + save_scan_value (hash, MM_SCAN_TAG_OPER_LONG, match_info, 2); + save_scan_value (hash, MM_SCAN_TAG_OPER_SHORT, match_info, 3); + save_scan_value (hash, MM_SCAN_TAG_OPER_NUM, match_info, 4); + + /* Only try for access technology with UMTS-format matches */ + if (umts_format) + access_tech = g_match_info_fetch (match_info, 5); + if (access_tech && (strlen (access_tech) == 1)) { + /* Recognized access technologies are between '0' and '6' inclusive... */ + if ((access_tech[0] >= '0') && (access_tech[0] <= '6')) + g_hash_table_insert (hash, g_strdup (MM_SCAN_TAG_ACCESS_TECH), access_tech); + } else + g_free (access_tech); + + /* If the operator number isn't valid (ie, at least 5 digits), + * ignore the scan result; it's probably the parameter stuff at the + * end of the +COPS response. The regex will sometimes catch this + * but there's no good way to ignore it. + */ + tmp = g_hash_table_lookup (hash, MM_SCAN_TAG_OPER_NUM); + if (tmp && (strlen (tmp) >= 5)) { + valid = TRUE; + while (*tmp) { + if (!isdigit (*tmp) && (*tmp != '-')) { + valid = FALSE; + break; + } + tmp++; + } + + if (valid) + g_ptr_array_add (results, hash); + } + + if (!valid) + g_hash_table_destroy (hash); + + g_match_info_next (match_info, NULL); + } + + g_match_info_free (match_info); + g_regex_unref (r); + + return results; +} + +void +mm_gsm_destroy_scan_data (gpointer data) +{ + GPtrArray *results = (GPtrArray *) data; + + g_ptr_array_foreach (results, (GFunc) g_hash_table_destroy, NULL); + g_ptr_array_free (results, TRUE); +} + |