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add configure check for non-POSIX compliant getnameinfo signature

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- glibc < 2.14 uses "unsigned" instead of "int" for flags
- openbsd and freebsd use "size_t" instead of socklen_t for servlen
  and nodelen, while still using socklen_t for salen.

closes #430
This commit is contained in:
rofl0r 2022-01-25 14:51:27 +00:00
parent 2cc014995e
commit 07c15a02f6
3 changed files with 19 additions and 3 deletions
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16
configure vendored
View File

@ -175,6 +175,22 @@ ishaiku() {
check_compile 'whether C compiler works' '' 'int main() {return 0;}' || fail 'error: install a C compiler and library'
if ! check_compile 'whether getnameinfo() servlen argument is POSIX compliant (socklen_t)' "-DGN_NODELEN_T=socklen_t -DGN_SERVLEN_T=socklen_t -DGN_FLAGS_T=int" \
'#define _GNU_SOURCE\n#include <netdb.h>\nint getnameinfo(const struct sockaddr *, socklen_t, char *, socklen_t, char *, socklen_t, int);int main() {\nreturn 0;}' ; then
# GLIBC < 2.14
if ! check_compile 'whether getnameinfo() flags argument is unsigned' "-DGN_NODELEN_T=socklen_t -DGN_SERVLEN_T=socklen_t -DGN_FLAGS_T=unsigned" \
'#define _GNU_SOURCE\n#include <netdb.h>\nint getnameinfo(const struct sockaddr *, socklen_t, char *, socklen_t, char *, socklen_t, unsigned);int main() {\nreturn 0;}' ; then
if ! check_compile 'whether getnameinfo() servlen argument is size_t' "-DGN_NODELEN_T=socklen_t -DGN_SERVLEN_T=size_t -DGN_FLAGS_T=int" \
'#define _GNU_SOURCE\n#include <netdb.h>\nint getnameinfo(const struct sockaddr *, socklen_t, char *, socklen_t, char *, size_t, int);int main() {\nreturn 0;}' ; then
# OpenBSD & FreeBSD
if ! check_compile 'whether getnameinfo() servlen and nodelen argument is size_t' "-DGN_NODELEN_T=size_t -DGN_SERVLEN_T=size_t -DGN_FLAGS_T=int" \
'#define _GNU_SOURCE\n#include <netdb.h>\nint getnameinfo(const struct sockaddr *, socklen_t, char *, size_t, char *, size_t, int);int main() {\nreturn 0;}' ; then
fail "failed to detect getnameinfo signature"
fi
fi
fi
fi
check_compile 'whether we have GNU-style getservbyname_r()' "-DHAVE_GNU_GETSERVBYNAME_R" \
'#define _GNU_SOURCE\n#include <netdb.h>\nint main() {\nstruct servent *se = 0;struct servent se_buf;char buf[1024];\ngetservbyname_r("foo", (void*) 0, &se_buf, buf, sizeof(buf), &se);\nreturn 0;}'

2
src/core.h
View File

@ -109,7 +109,7 @@ typedef int (*getaddrinfo_t)(const char *, const char *, const struct addrinfo *
struct addrinfo **);
typedef int (*getnameinfo_t) (const struct sockaddr *, socklen_t, char *,
socklen_t, char *, socklen_t, int);
GN_NODELEN_T, char *, GN_SERVLEN_T, GN_FLAGS_T);
typedef ssize_t (*sendto_t) (int sockfd, const void *buf, size_t len, int flags,
const struct sockaddr *dest_addr, socklen_t addrlen);

4
src/libproxychains.c
View File

@ -729,8 +729,8 @@ HOOKFUNC(void, freeaddrinfo, struct addrinfo *res) {
}
HOOKFUNC(int, getnameinfo, const struct sockaddr *sa, socklen_t salen,
char *host, socklen_t hostlen, char *serv,
socklen_t servlen, int flags)
char *host, GN_NODELEN_T hostlen, char *serv,
GN_SERVLEN_T servlen, GN_FLAGS_T flags)
{
INIT();
PFUNC();