The code has multiple issues making it unusable with modern FreeBSD:
* it uses long gone ascii2addr() function removed in 2007;
* it passes hardcoded "/usr/lib/libc.so" path to dlopen(),
but now it is plain text hint file;
* this IPv4-only code neglects to check passed domain for PF_INET
messing with sockets in other domains (like PF_INET6, PF_LOCAL).
Still, it is very useful while dealing with software like Nagios
that does not support binding to specific IPv4 address
for outgoing connections. The library solves the problem with single line
in /etc/rc.conf:
nagios_env="LD_PRELOAD=/usr/local/lib/libsocketbind.so.1 BINDTO=192.168.6.1"
This changes unbreaks the library making it usable again.
03a9755147