diff options
| author | dequis <dx@dxzone.com.ar> | 2015-02-22 02:00:37 -0300 |
|---|---|---|
| committer | dequis <dx@dxzone.com.ar> | 2015-02-22 18:19:21 -0300 |
| commit | 552c8a5bc1466f300a8861b74b1e7dc2b7cf9bbc (patch) | |
| tree | bb362538db469602444be93544f4b4ecb40b6c55 /protocols/twitter/twitter.c | |
| parent | 273949d63272f43ed7f41a2f8fbc71fc5bcd3e21 (diff) | |
twitter_parse_id function, with better error handling than sscanf()
Fixes issues such as parsing "reply eo" as replying to "0e",
as reported by torrancew
Diffstat (limited to 'protocols/twitter/twitter.c')
| -rw-r--r-- | protocols/twitter/twitter.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/protocols/twitter/twitter.c b/protocols/twitter/twitter.c index f3dcde31..891d07a6 100644 --- a/protocols/twitter/twitter.c +++ b/protocols/twitter/twitter.c @@ -851,6 +851,20 @@ static void twitter_buddy_data_free(struct bee_user *bu) g_free(bu->data); } +/* Parses a decimal or hex tweet ID, handling errors by returning 0 */ +static guint64 twitter_parse_id(char *string, int base) +{ + guint64 parsed; + char *endptr; + + errno = 0; + parsed = g_ascii_strtoull(string, &endptr, base); + if (errno || endptr == string || *endptr == '\0') { + return 0; + } + return parsed; +} + /** Convert the given bitlbee tweet ID, bitlbee username, or twitter tweet ID * into a twitter tweet ID. * @@ -878,15 +892,14 @@ static guint64 twitter_message_id_from_command_arg(struct im_connection *ic, cha if (arg[0] == '#') { arg++; } - if (sscanf(arg, "%" G_GINT64_MODIFIER "x", &id) == 1 && - id < TWITTER_LOG_LENGTH) { + if ((id = twitter_parse_id(arg, 16)) && id < TWITTER_LOG_LENGTH) { bu = td->log[id].bu; id = td->log[id].id; /* Beware of dangling pointers! */ if (!g_slist_find(ic->bee->users, bu)) { bu = NULL; } - } else if (sscanf(arg, "%" G_GINT64_MODIFIER "d", &id) == 1) { + } else if ((id = twitter_parse_id(arg, 10))) { /* Allow normal tweet IDs as well; not a very useful feature but it's always been there. Just ignore very low IDs to avoid accidents. */ |