*
* Connect to host at port using address resolution from getaddrinfo
*
- * Licensed under GPLv2, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
+#include <sys/types.h>
+#include <sys/socket.h> /* netinet/in.h needs it */
#include <netinet/in.h>
#include <net/if.h>
+#include <sys/un.h>
#include "libbb.h"
void FAST_FUNC setsockopt_reuseaddr(int fd)
{
return setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &const_int_1, sizeof(const_int_1));
}
+
+#ifdef SO_BINDTODEVICE
int FAST_FUNC setsockopt_bindtodevice(int fd, const char *iface)
{
int r;
bb_perror_msg("can't bind to interface %s", iface);
return r;
}
+#else
+int FAST_FUNC setsockopt_bindtodevice(int fd UNUSED_PARAM,
+ const char *iface UNUSED_PARAM)
+{
+ bb_error_msg("SO_BINDTODEVICE is not supported on this system");
+ return -1;
+}
+#endif
-len_and_sockaddr* FAST_FUNC get_sock_lsa(int fd)
+static len_and_sockaddr* get_lsa(int fd, int (*get_name)(int fd, struct sockaddr *addr, socklen_t *addrlen))
{
- len_and_sockaddr *lsa;
- socklen_t len = 0;
+ len_and_sockaddr lsa;
+ len_and_sockaddr *lsa_ptr;
- /* Can be optimized to do only one getsockname() */
- if (getsockname(fd, NULL, &len) != 0)
+ lsa.len = LSA_SIZEOF_SA;
+ if (get_name(fd, &lsa.u.sa, &lsa.len) != 0)
return NULL;
- lsa = xzalloc(LSA_LEN_SIZE + len);
- lsa->len = len;
- getsockname(fd, &lsa->u.sa, &lsa->len);
- return lsa;
+
+ lsa_ptr = xzalloc(LSA_LEN_SIZE + lsa.len);
+ if (lsa.len > LSA_SIZEOF_SA) { /* rarely (if ever) happens */
+ lsa_ptr->len = lsa.len;
+ get_name(fd, &lsa_ptr->u.sa, &lsa_ptr->len);
+ } else {
+ memcpy(lsa_ptr, &lsa, LSA_LEN_SIZE + lsa.len);
+ }
+ return lsa_ptr;
+}
+
+len_and_sockaddr* FAST_FUNC get_sock_lsa(int fd)
+{
+ return get_lsa(fd, getsockname);
+}
+
+len_and_sockaddr* FAST_FUNC get_peer_lsa(int fd)
+{
+ return get_lsa(fd, getpeername);
}
void FAST_FUNC xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen)
close(s);
if (s_addr->sa_family == AF_INET)
bb_perror_msg_and_die("%s (%s)",
- "cannot connect to remote host",
+ "can't connect to remote host",
inet_ntoa(((struct sockaddr_in *)s_addr)->sin_addr));
- bb_perror_msg_and_die("cannot connect to remote host");
+ bb_perror_msg_and_die("can't connect to remote host");
}
}
}
-/* "Old" networking API - only IPv4 */
-
-/*
-void FAST_FUNC bb_lookup_host(struct sockaddr_in *s_in, const char *host)
-{
- struct hostent *he;
-
- memset(s_in, 0, sizeof(struct sockaddr_in));
- s_in->sin_family = AF_INET;
- he = xgethostbyname(host);
- memcpy(&(s_in->sin_addr), he->h_addr_list[0], he->h_length);
-}
-
-
-int FAST_FUNC xconnect_tcp_v4(struct sockaddr_in *s_addr)
-{
- int s = xsocket(AF_INET, SOCK_STREAM, 0);
- xconnect(s, (struct sockaddr*) s_addr, sizeof(*s_addr));
- return s;
-}
-*/
-
/* "New" networking API */
* port: if neither of above specifies port # */
static len_and_sockaddr* str2sockaddr(
const char *host, int port,
-USE_FEATURE_IPV6(sa_family_t af,)
+IF_FEATURE_IPV6(sa_family_t af,)
int ai_flags)
{
+IF_NOT_FEATURE_IPV6(sa_family_t af = AF_INET;)
int rc;
- len_and_sockaddr *r = NULL;
+ len_and_sockaddr *r;
struct addrinfo *result = NULL;
struct addrinfo *used_res;
const char *org_host = host; /* only for error msg */
const char *cp;
struct addrinfo hint;
+ if (ENABLE_FEATURE_UNIX_LOCAL && strncmp(host, "local:", 6) == 0) {
+ struct sockaddr_un *sun;
+
+ r = xzalloc(LSA_LEN_SIZE + sizeof(struct sockaddr_un));
+ r->len = sizeof(struct sockaddr_un);
+ r->u.sa.sa_family = AF_UNIX;
+ sun = (struct sockaddr_un *)&r->u.sa;
+ safe_strncpy(sun->sun_path, host + 6, sizeof(sun->sun_path));
+ return r;
+ }
+
+ r = NULL;
+
/* Ugly parsing of host:addr */
if (ENABLE_FEATURE_IPV6 && host[0] == '[') {
/* Even uglier parsing of [xx]:nn */
host++;
cp = strchr(host, ']');
- if (!cp || cp[1] != ':') { /* Malformed: must have [xx]:nn */
+ if (!cp || (cp[1] != ':' && cp[1] != '\0')) {
+ /* Malformed: must be [xx]:nn or [xx] */
bb_error_msg("bad address '%s'", org_host);
if (ai_flags & DIE_ON_ERROR)
xfunc_die();
}
if (cp) { /* points to ":" or "]:" */
int sz = cp - host + 1;
+
host = safe_strncpy(alloca(sz), host, sz);
- if (ENABLE_FEATURE_IPV6 && *cp != ':')
+ if (ENABLE_FEATURE_IPV6 && *cp != ':') {
cp++; /* skip ']' */
+ if (*cp == '\0') /* [xx] without port */
+ goto skip;
+ }
cp++; /* skip ':' */
port = bb_strtou(cp, NULL, 10);
if (errno || (unsigned)port > 0xffff) {
xfunc_die();
return NULL;
}
+ skip: ;
}
+ /* Next two if blocks allow to skip getaddrinfo()
+ * in case host name is a numeric IP(v6) address.
+ * getaddrinfo() initializes DNS resolution machinery,
+ * scans network config and such - tens of syscalls.
+ */
+ /* If we were not asked specifically for IPv6,
+ * check whether this is a numeric IPv4 */
+ IF_FEATURE_IPV6(if(af != AF_INET6)) {
+ struct in_addr in4;
+ if (inet_aton(host, &in4) != 0) {
+ r = xzalloc(LSA_LEN_SIZE + sizeof(struct sockaddr_in));
+ r->len = sizeof(struct sockaddr_in);
+ r->u.sa.sa_family = AF_INET;
+ r->u.sin.sin_addr = in4;
+ goto set_port;
+ }
+ }
+#if ENABLE_FEATURE_IPV6
+ /* If we were not asked specifically for IPv4,
+ * check whether this is a numeric IPv6 */
+ if (af != AF_INET) {
+ struct in6_addr in6;
+ if (inet_pton(AF_INET6, host, &in6) > 0) {
+ r = xzalloc(LSA_LEN_SIZE + sizeof(struct sockaddr_in6));
+ r->len = sizeof(struct sockaddr_in6);
+ r->u.sa.sa_family = AF_INET6;
+ r->u.sin6.sin6_addr = in6;
+ goto set_port;
+ }
+ }
+#endif
+
memset(&hint, 0 , sizeof(hint));
-#if !ENABLE_FEATURE_IPV6
- hint.ai_family = AF_INET; /* do not try to find IPv6 */
-#else
hint.ai_family = af;
-#endif
/* Needed. Or else we will get each address thrice (or more)
* for each possible socket type (tcp,udp,raw...): */
hint.ai_socktype = SOCK_STREAM;
}
}
#endif
- r = xmalloc(offsetof(len_and_sockaddr, u.sa) + used_res->ai_addrlen);
+ r = xmalloc(LSA_LEN_SIZE + used_res->ai_addrlen);
r->len = used_res->ai_addrlen;
memcpy(&r->u.sa, used_res->ai_addr, used_res->ai_addrlen);
+
+ set_port:
set_nport(r, htons(port));
ret:
freeaddrinfo(result);
}
#undef xsocket_type
-int FAST_FUNC xsocket_type(len_and_sockaddr **lsap, USE_FEATURE_IPV6(int family,) int sock_type)
+int FAST_FUNC xsocket_type(len_and_sockaddr **lsap, IF_FEATURE_IPV6(int family,) int sock_type)
{
- SKIP_FEATURE_IPV6(enum { family = AF_INET };)
+ IF_NOT_FEATURE_IPV6(enum { family = AF_INET };)
len_and_sockaddr *lsa;
int fd;
int len;
len = sizeof(struct sockaddr_in6);
}
#endif
- lsa = xzalloc(offsetof(len_and_sockaddr, u.sa) + len);
+ lsa = xzalloc(LSA_LEN_SIZE + len);
lsa->len = len;
lsa->u.sa.sa_family = family;
*lsap = lsa;
int FAST_FUNC xsocket_stream(len_and_sockaddr **lsap)
{
- return xsocket_type(lsap, USE_FEATURE_IPV6(AF_UNSPEC,) SOCK_STREAM);
+ return xsocket_type(lsap, IF_FEATURE_IPV6(AF_UNSPEC,) SOCK_STREAM);
}
static int create_and_bind_or_die(const char *bindaddr, int port, int sock_type)
/* user specified bind addr dictates family */
fd = xsocket(lsa->u.sa.sa_family, sock_type, 0);
} else {
- fd = xsocket_type(&lsa, USE_FEATURE_IPV6(AF_UNSPEC,) sock_type);
+ fd = xsocket_type(&lsa, IF_FEATURE_IPV6(AF_UNSPEC,) sock_type);
set_nport(lsa, htons(port));
}
setsockopt_reuseaddr(fd);
int rc;
socklen_t salen;
+ if (ENABLE_FEATURE_UNIX_LOCAL && sa->sa_family == AF_UNIX) {
+ struct sockaddr_un *sun = (struct sockaddr_un *)sa;
+ return xasprintf("local:%.*s",
+ (int) sizeof(sun->sun_path),
+ sun->sun_path);
+ }
+
salen = LSA_SIZEOF_SA;
#if ENABLE_FEATURE_IPV6
if (sa->sa_family == AF_INET)
projects / oweals / busybox.git / blobdiff