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res_pjsip: Add existence and readablity checks for tls related files

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Both transport and endpoint now check for the existence and readability
of tls certificate and key files before passing them on to pjproject.
This will cause the object to not load rather than waiting for pjproject
to discover that there's a problem when a session is attempted.

NOTE: chan_sip also uses ast_rtp_dtls_cfg_parse but it's located
in build_peer which is gigantic and I didn't want to disturb it.
Error messages will emit but it won't interrupt chan_sip loading.

ASTERISK-25618 #close

Change-Id: Ie43f2c1d653ac1fda6a6f6faecb7c2ebadaf47c9
Reported-by: George Joseph
Tested-by: George Joseph
This commit is contained in:
George Joseph
2015-12-08 16:49:20 -07:00
parent 4cf470c70a
commit a987434564
5 changed files with 73 additions and 1 deletions
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17
main/utils.c
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@@ -2927,3 +2927,20 @@ int ast_eid_cmp(const struct ast_eid *eid1, const struct ast_eid *eid2)
{
return memcmp(eid1, eid2, sizeof(*eid1));
}
int ast_file_is_readable(const char *filename)
{
#if defined(HAVE_EACCESS) || defined(HAVE_EUIDACCESS)
#if defined(HAVE_EUIDACCESS) && !defined(HAVE_EACCESS)
#define eaccess euidaccess
#endif
return eaccess(filename, R_OK) == 0;
#else
int fd = open(filename, O_RDONLY | O_NONBLOCK);
if (fd < 0) {
return 0;
}
close(fd);
return 1;
#endif
}