yongboy / bindp Goto Github PK
View Code? Open in Web Editor NEWBinding specific IP and Port fro Linux Running Application
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bind wrapper does not check for address family
Bind wrapper assume AF_INET address family, here:
lsk_in = (struct sockaddr_in *)sk;
If given socket is something different (like AF_UNIX), this may lead to various errors, from bind syscall failures (invalid address value in sockaddr structure), to memory corruption (writing outside of structure), with potentially some security implications.
Implement AF_INET6
I have been testing a similar lib called libttu, but it's old and a little buggy with IPv6 and Unix Sockets together.
This is my suggestion.
ERROR: ld.so: object '/usr/lib/libindp.so' from LD_PRELOAD cannot be preloaded (cannot dynamically load position-independent executable): ignored.
ERROR: ld.so: object '/usr/lib/libindp.so' from LD_PRELOAD cannot be preloaded (cannot dynamically load position-independent executable): ignored.
This is happening since Debian bullseye.
Found this, same error message for a different library:
/usr/bin/ld.bfd.real: warning: cannot find entry symbol _start; defaulting to 0000000000000660
gcc -nostartfiles -fpic -shared bindp.c -o libindp.so -ldl -D_GNU_SOURCE -D_FORTIFY_SOURCE=2 -g -O2 -fPIE -fstack-protector-strong -Wformat -Werror=format-security -fPIE -pie -Wl,-z,relro -Wl,-z,now
/usr/bin/ld.bfd.real: warning: cannot find entry symbol _start; defaulting to 0000000000000660
fix stack canary
checksec --file libindp.so
RELRO STACK CANARY NX PIE RPATH RUNPATH FILE
Full RELRO No canary found NX enabled PIE enabled No RPATH No RUNPATH libindp.so
编译问题
在readme中，应该是make all编译
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