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res_pjproject: Fix DTLS client check failing on some platforms

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Certain platforms (mainly BSD derivatives) have an additional length
field in `sockaddr_in6` and `sockaddr_in`.
`ast_sockaddr_from_pj_sockaddr()` does not take this field into account
when copying over values from the `pj_sockaddr` into the `ast_sockaddr`.
The resulting `ast_sockaddr` will have an uninitialized value for
`sin6_len`/`sin_len` while the other `ast_sockaddr` (not converted from
a `pj_sockaddr`) to check against in `ast_sockaddr_pj_sockaddr_cmp()`
has the correct length value set.

This has the effect that `ast_sockaddr_cmp()` will always indicate
an address mismatch, because it does a bitwise comparison, and all DTLS
packets are dropped even if addresses and ports match.

`ast_sockaddr_from_pj_sockaddr()` now checks whether the length fields
are available on the current platform and sets the values accordingly.

Resolves: #505
(cherry picked from commit c251afadb9)
This commit is contained in:
Albrecht Oster
2025-04-10 23:54:00 +02:00
committed by Asterisk Development Team
parent 230f15e40d
commit a2020fd04b
4 changed files with 32 additions and 0 deletions
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6
include/asterisk/autoconfig.h.in
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@@ -1055,6 +1055,12 @@
/* Define to 1 if 'ifr_ifru.ifru_hwaddr' is a member of 'struct ifreq'. */
#undef HAVE_STRUCT_IFREQ_IFR_IFRU_IFRU_HWADDR
/* Define to 1 if 'sin6_len' is a member of 'struct sockaddr_in6'. */
#undef HAVE_STRUCT_SOCKADDR_IN6_SIN6_LEN
/* Define to 1 if 'sin_len' is a member of 'struct sockaddr_in'. */
#undef HAVE_STRUCT_SOCKADDR_IN_SIN_LEN
/* Define to 1 if 'uid' is a member of 'struct sockpeercred'. */
#undef HAVE_STRUCT_SOCKPEERCRED_UID