| /* |
| * This file is part of the UCB release of Plan 9. It is subject to the license |
| * terms in the LICENSE file found in the top-level directory of this |
| * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No |
| * part of the UCB release of Plan 9, including this file, may be copied, |
| * modified, propagated, or distributed except according to the terms contained |
| * in the LICENSE file. |
| */ |
| /* posix */ |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| /* bsd extensions */ |
| #include <sys/uio.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| #include <netdb.h> |
| #include <errno.h> |
| #include <arpa/inet.h> |
| |
| #include <sys/plan9_helpers.h> |
| |
| /* similar to gethostbyaddr, just calling the reentrant _r method, and using |
| * inet_ntop instead of the non-reentrant inet_ntoa. */ |
| int __gethostbyaddr_r(const void *addr, socklen_t len, int type, |
| struct hostent *ret, char *buf, size_t buflen, |
| struct hostent **result, int *h_errnop) |
| { |
| unsigned long y; |
| struct in_addr x; |
| __const unsigned char *p = addr; |
| char name[INET6_ADDRSTRLEN]; |
| |
| if (type != AF_INET || len != 4) { |
| h_errno = NO_RECOVERY; |
| return -EAFNOSUPPORT; |
| } |
| |
| y = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]; |
| x.s_addr = htonl(y); |
| |
| if (!inet_ntop(AF_INET, (void*)&x, name, INET6_ADDRSTRLEN)) |
| return -errno; |
| |
| return gethostbyname_r(name, ret, buf, buflen, result, h_errnop); |
| } |
| weak_alias(__gethostbyaddr_r, gethostbyaddr_r); |
