diff options
Diffstat (limited to 'resolv/compat-gethnamaddr.c')
| -rw-r--r-- | resolv/compat-gethnamaddr.c | 95 |
1 files changed, 65 insertions, 30 deletions
diff --git a/resolv/compat-gethnamaddr.c b/resolv/compat-gethnamaddr.c index 813c7d4e85..259378b2be 100644 --- a/resolv/compat-gethnamaddr.c +++ b/resolv/compat-gethnamaddr.c @@ -67,6 +67,7 @@ # include <stdio.h> # include <netdb.h> # include <resolv/resolv-internal.h> +# include <resolv/resolv_context.h> # include <ctype.h> # include <errno.h> # include <stdlib.h> @@ -84,6 +85,9 @@ static u_char host_addr[16]; /* IPv4 or IPv6 */ static FILE *hostf = NULL; static int stayopen = 0; +static struct hostent *res_gethostbyname2_context (struct resolv_context *, + const char *name, int af); + static void map_v4v6_address (const char *src, char *dst) __THROW; static void map_v4v6_hostent (struct hostent *hp, char **bp, int *len) __THROW; @@ -428,23 +432,31 @@ libresolv_hidden_proto (res_gethostbyname2) struct hostent * res_gethostbyname (const char *name) { - struct hostent *hp; - - if (__res_maybe_init (&_res, 0) == -1) { - __set_h_errno (NETDB_INTERNAL); - return (NULL); - } - if (res_use_inet6 ()) { - hp = res_gethostbyname2(name, AF_INET6); - if (hp) - return (hp); + struct resolv_context *ctx = __resolv_context_get (); + if (ctx == NULL) + { + __set_h_errno (NETDB_INTERNAL); + return NULL; + } + + if (res_use_inet6 ()) + { + struct hostent *hp = res_gethostbyname2_context (ctx, name, AF_INET6); + if (hp != NULL) + { + __resolv_context_put (ctx); + return hp; } - return (res_gethostbyname2(name, AF_INET)); + } + struct hostent *hp = res_gethostbyname2_context (ctx, name, AF_INET); + __resolv_context_put (ctx); + return hp; } compat_symbol (libresolv, res_gethostbyname, res_gethostbyname, GLIBC_2_0); -struct hostent * -res_gethostbyname2 (const char *name, int af) +static struct hostent * +res_gethostbyname2_context (struct resolv_context *ctx, + const char *name, int af) { union { @@ -457,11 +469,6 @@ res_gethostbyname2 (const char *name, int af) int n, size, type, len; struct hostent *ret; - if (__res_maybe_init (&_res, 0) == -1) { - __set_h_errno (NETDB_INTERNAL); - return (NULL); - } - switch (af) { case AF_INET: size = INADDRSZ; @@ -485,8 +492,10 @@ res_gethostbyname2 (const char *name, int af) * this is also done in res_query() since we are not the only * function that looks up host names. */ - if (!strchr(name, '.') && (cp = __hostalias(name))) - name = cp; + char abuf[MAXDNAME]; + if (strchr (name, '.') != NULL + && (cp = __res_context_hostalias (ctx, name, abuf, sizeof (abuf)))) + name = cp; /* * disallow names consisting only of digits/dots, unless @@ -558,8 +567,9 @@ res_gethostbyname2 (const char *name, int af) buf.buf = origbuf = (querybuf *) alloca (1024); - if ((n = __libc_res_nsearch(&_res, name, C_IN, type, buf.buf->buf, 1024, - &buf.ptr, NULL, NULL, NULL, NULL)) < 0) { + if ((n = __res_context_search + (ctx, name, C_IN, type, buf.buf->buf, 1024, + &buf.ptr, NULL, NULL, NULL, NULL)) < 0) { if (buf.buf != origbuf) free (buf.buf); Dprintf("res_nsearch failed (%d)\n", n); @@ -572,11 +582,26 @@ res_gethostbyname2 (const char *name, int af) free (buf.buf); return ret; } + +struct hostent * +res_gethostbyname2 (const char *name, int af) +{ + struct resolv_context *ctx = __resolv_context_get (); + if (ctx == NULL) + { + __set_h_errno (NETDB_INTERNAL); + return NULL; + } + struct hostent *hp = res_gethostbyname2_context (ctx, name, AF_INET); + __resolv_context_put (ctx); + return hp; +} libresolv_hidden_def (res_gethostbyname2) compat_symbol (libresolv, res_gethostbyname2, res_gethostbyname2, GLIBC_2_0); -struct hostent * -res_gethostbyaddr (const void *addr, socklen_t len, int af) +static struct hostent * +res_gethostbyaddr_context (struct resolv_context *ctx, + const void *addr, socklen_t len, int af) { const u_char *uaddr = (const u_char *)addr; static const u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff }; @@ -592,10 +617,6 @@ res_gethostbyaddr (const void *addr, socklen_t len, int af) struct hostent *hp; char qbuf[MAXDNAME+1], *qp = NULL; - if (__res_maybe_init (&_res, 0) == -1) { - __set_h_errno (NETDB_INTERNAL); - return (NULL); - } if (af == AF_INET6 && len == IN6ADDRSZ && (!memcmp(uaddr, mapped, sizeof mapped) || !memcmp(uaddr, tunnelled, sizeof tunnelled))) { @@ -645,8 +666,8 @@ res_gethostbyaddr (const void *addr, socklen_t len, int af) buf.buf = orig_buf = (querybuf *) alloca (1024); - n = __libc_res_nquery(&_res, qbuf, C_IN, T_PTR, buf.buf->buf, 1024, - &buf.ptr, NULL, NULL, NULL, NULL); + n = __res_context_query (ctx, qbuf, C_IN, T_PTR, buf.buf->buf, 1024, + &buf.ptr, NULL, NULL, NULL, NULL); if (n < 0) { if (buf.buf != orig_buf) free (buf.buf); @@ -673,6 +694,20 @@ res_gethostbyaddr (const void *addr, socklen_t len, int af) __set_h_errno (NETDB_SUCCESS); return (hp); } + +struct hostent * +res_gethostbyaddr (const void *addr, socklen_t len, int af) +{ + struct resolv_context *ctx = __resolv_context_get (); + if (ctx == NULL) + { + __set_h_errno (NETDB_INTERNAL); + return NULL; + } + struct hostent *hp = res_gethostbyaddr_context (ctx, addr, len, af); + __resolv_context_put (ctx); + return hp; +} compat_symbol (libresolv, res_gethostbyaddr, res_gethostbyaddr, GLIBC_2_0); void |