Make opensips behave consistently in respect of nsswitch regardless of DNS caching. #2434
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Any updates here? No progress has been made in the last 15 days, marking as stale. Will close this issue if no further updates are made in the next 30 days. |
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Marking as closed due to lack of progress for more than 30 days. If this issue is still relevant, please re-open it with additional details. |
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Any updates here? No progress has been made in the last 15 days, marking as stale. Will close this issue if no further updates are made in the next 30 days. |
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The problem with this patch is that we don't have any TTL information when using gethostbyXXX() functions. :( As such it breaks invalidation of the cache. |
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The current integration with dns_cache module has an issue. When dns_cache module is disabled the OpenSIPS uses gethostbyname(), gethostbyname2(), gethostbyaddr() functions from libc which respect the nsswitch.conf settings and for example automatically perform a lookup in /etc/hosts. However when dns_cache is enabled the OpenSIPS starts to use res_search() instead, which only performs DNS lookups and as a result it becomes impossible to query other name resolution services configured in the nsswitch.conf.
I propose to use gethostby*() functions consistently regardless of caching settings.