Index: fusl/src/network/gethostbyname2_r.c |
diff --git a/fusl/src/network/gethostbyname2_r.c b/fusl/src/network/gethostbyname2_r.c |
new file mode 100644 |
index 0000000000000000000000000000000000000000..81f71d2160fef695510d53063ba7b8d55716977f |
--- /dev/null |
+++ b/fusl/src/network/gethostbyname2_r.c |
@@ -0,0 +1,82 @@ |
+#define _GNU_SOURCE |
+ |
+#include <sys/socket.h> |
+#include <netdb.h> |
+#include <string.h> |
+#include <netinet/in.h> |
+#include <errno.h> |
+#include <stdint.h> |
+#include "lookup.h" |
+ |
+int gethostbyname2_r(const char *name, int af, |
+ struct hostent *h, char *buf, size_t buflen, |
+ struct hostent **res, int *err) |
+{ |
+ struct address addrs[MAXADDRS]; |
+ char canon[256]; |
+ int i, cnt; |
+ size_t align, need; |
+ |
+ *res = 0; |
+ cnt = __lookup_name(addrs, canon, name, af, AI_CANONNAME); |
+ if (cnt<0) switch (cnt) { |
+ case EAI_NONAME: |
+ *err = HOST_NOT_FOUND; |
+ return ENOENT; |
+ case EAI_AGAIN: |
+ *err = TRY_AGAIN; |
+ return EAGAIN; |
+ default: |
+ case EAI_FAIL: |
+ *err = NO_RECOVERY; |
+ return EBADMSG; |
+ case EAI_MEMORY: |
+ case EAI_SYSTEM: |
+ *err = NO_RECOVERY; |
+ return errno; |
+ case 0: |
+ break; |
+ } |
+ |
+ h->h_addrtype = af; |
+ h->h_length = af==AF_INET6 ? 16 : 4; |
+ |
+ /* Align buffer */ |
+ align = -(uintptr_t)buf & sizeof(char *)-1; |
+ |
+ need = 4*sizeof(char *); |
+ need += (cnt + 1) * (sizeof(char *) + h->h_length); |
+ need += strlen(name)+1; |
+ need += strlen(canon)+1; |
+ need += align; |
+ |
+ if (need > buflen) return ERANGE; |
+ |
+ buf += align; |
+ h->h_aliases = (void *)buf; |
+ buf += 3*sizeof(char *); |
+ h->h_addr_list = (void *)buf; |
+ buf += (cnt+1)*sizeof(char *); |
+ |
+ h->h_name = h->h_aliases[0] = buf; |
+ strcpy(h->h_name, canon); |
+ buf += strlen(h->h_name)+1; |
+ |
+ if (strcmp(h->h_name, name)) { |
+ h->h_aliases[1] = buf; |
+ strcpy(h->h_aliases[1], name); |
+ buf += strlen(h->h_aliases[1])+1; |
+ } else h->h_aliases[1] = 0; |
+ |
+ h->h_aliases[2] = 0; |
+ |
+ for (i=0; i<cnt; i++) { |
+ h->h_addr_list[i] = (void *)buf; |
+ buf += h->h_length; |
+ memcpy(h->h_addr_list[i], addrs[i].addr, h->h_length); |
+ } |
+ h->h_addr_list[i] = 0; |
+ |
+ *res = h; |
+ return 0; |
+} |