*
* Connect to host at port using address resolution from getaddrinfo
*
+ * 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"
-static const int one = 1;
-int setsockopt_reuseaddr(int fd)
+int FAST_FUNC setsockopt_int(int fd, int level, int optname, int optval)
+{
+ return setsockopt(fd, level, optname, &optval, sizeof(int));
+}
+int FAST_FUNC setsockopt_1(int fd, int level, int optname)
+{
+ return setsockopt_int(fd, level, optname, 1);
+}
+int FAST_FUNC setsockopt_SOL_SOCKET_int(int fd, int optname, int optval)
+{
+ return setsockopt_int(fd, SOL_SOCKET, optname, optval);
+}
+int FAST_FUNC setsockopt_SOL_SOCKET_1(int fd, int optname)
+{
+ return setsockopt_SOL_SOCKET_int(fd, optname, 1);
+}
+
+void FAST_FUNC setsockopt_reuseaddr(int fd)
+{
+ setsockopt_SOL_SOCKET_1(fd, SO_REUSEADDR);
+}
+int FAST_FUNC setsockopt_broadcast(int fd)
+{
+ return setsockopt_SOL_SOCKET_1(fd, SO_BROADCAST);
+}
+int FAST_FUNC setsockopt_keepalive(int fd)
+{
+ return setsockopt_SOL_SOCKET_1(fd, SO_KEEPALIVE);
+}
+
+#ifdef SO_BINDTODEVICE
+int FAST_FUNC setsockopt_bindtodevice(int fd, const char *iface)
+{
+ int r;
+ struct ifreq ifr;
+ strncpy_IFNAMSIZ(ifr.ifr_name, iface);
+ /* NB: passing (iface, strlen(iface) + 1) does not work!
+ * (maybe it works on _some_ kernels, but not on 2.6.26)
+ * Actually, ifr_name is at offset 0, and in practice
+ * just giving char[IFNAMSIZ] instead of struct ifreq works too.
+ * But just in case it's not true on some obscure arch... */
+ r = setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr));
+ if (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
+
+static len_and_sockaddr* get_lsa(int fd, int (*get_name)(int fd, struct sockaddr *addr, socklen_t *addrlen))
+{
+ len_and_sockaddr lsa;
+ len_and_sockaddr *lsa_ptr;
+
+ lsa.len = LSA_SIZEOF_SA;
+ if (get_name(fd, &lsa.u.sa, &lsa.len) != 0)
+ return NULL;
+
+ 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 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
+ return get_lsa(fd, getsockname);
}
-int setsockopt_broadcast(int fd)
+
+len_and_sockaddr* FAST_FUNC get_peer_lsa(int fd)
{
- return setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one));
+ return get_lsa(fd, getpeername);
}
-void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen)
+void FAST_FUNC xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen)
{
if (connect(s, s_addr, addrlen) < 0) {
if (ENABLE_FEATURE_CLEAN_UP)
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");
}
}
/* Return port number for a service.
* If "port" is a number use it as the port.
- * If "port" is a name it is looked up in /etc/services, if it isnt found return
- * default_port */
-unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port)
+ * If "port" is a name it is looked up in /etc/services,
+ * if it isnt found return default_port
+ */
+unsigned FAST_FUNC bb_lookup_port(const char *port, const char *protocol, unsigned default_port)
{
unsigned port_nr = default_port;
if (port) {
port_nr = bb_strtou(port, NULL, 10);
if (errno || port_nr > 65535) {
struct servent *tserv = getservbyname(port, protocol);
+ port_nr = default_port;
if (tserv)
port_nr = ntohs(tserv->s_port);
}
}
-/* "Old" networking API - only IPv4 */
-
-
-void 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 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 */
-int get_nport(len_and_sockaddr *lsa)
+int FAST_FUNC get_nport(const struct sockaddr *sa)
{
#if ENABLE_FEATURE_IPV6
- if (lsa->sa.sa_family == AF_INET6) {
- return lsa->sin6.sin6_port;
+ if (sa->sa_family == AF_INET6) {
+ return ((struct sockaddr_in6*)sa)->sin6_port;
}
#endif
- if (lsa->sa.sa_family == AF_INET) {
- return lsa->sin.sin_port;
+ if (sa->sa_family == AF_INET) {
+ return ((struct sockaddr_in*)sa)->sin_port;
}
- return -1;
/* What? UNIX socket? IPX?? :) */
+ return -1;
}
-void set_nport(len_and_sockaddr *lsa, unsigned port)
+void FAST_FUNC set_nport(struct sockaddr *sa, unsigned port)
{
#if ENABLE_FEATURE_IPV6
- if (lsa->sa.sa_family == AF_INET6) {
- lsa->sin6.sin6_port = port;
+ if (sa->sa_family == AF_INET6) {
+ struct sockaddr_in6 *sin6 = (void*) sa;
+ sin6->sin6_port = port;
return;
}
#endif
- if (lsa->sa.sa_family == AF_INET) {
- lsa->sin.sin_port = port;
+ if (sa->sa_family == AF_INET) {
+ struct sockaddr_in *sin = (void*) sa;
+ sin->sin_port = port;
return;
}
/* What? UNIX socket? IPX?? :) */
}
-/* peer: "1.2.3.4[:port]", "www.google.com[:port]"
- * port: if neither of above specifies port #
- */
-static len_and_sockaddr* str2sockaddr(const char *host, int port, int ai_flags)
+/* We hijack this constant to mean something else */
+/* It doesn't hurt because we will remove this bit anyway */
+#define DIE_ON_ERROR AI_CANONNAME
+
+/* host: "1.2.3.4[:port]", "www.google.com[:port]"
+ * port: if neither of above specifies port # */
+static len_and_sockaddr* str2sockaddr(
+ const char *host, int port,
+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 && is_prefixed_with(host, "local:")) {
+ 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 */
- bb_error_msg_and_die("bad address '%s'", org_host);
- //return r; /* return NULL */
+ 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();
+ return NULL;
+ }
} else {
cp = strrchr(host, ':');
if (ENABLE_FEATURE_IPV6 && cp && strchr(host, ':') != cp) {
cp = NULL; /* it's not a port spec */
}
}
- if (cp) {
+ 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 = xatou16(cp);
+ port = bb_strtou(cp, NULL, 10);
+ if (errno || (unsigned)port > 0xffff) {
+ bb_error_msg("bad port spec '%s'", org_host);
+ if (ai_flags & DIE_ON_ERROR)
+ xfunc_die();
+ return NULL;
+ }
+ skip: ;
}
- memset(&hint, 0 , sizeof(hint));
- /* hint.ai_family = AF_UNSPEC; - zero anyway */
-#if !ENABLE_FEATURE_IPV6
- hint.ai_family = AF_INET; /* do not try to find IPv6 */
+ /* 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
- /* Needed. Or else we will get each address thrice (or more)
+
+ memset(&hint, 0 , sizeof(hint));
+ hint.ai_family = af;
+ /* Need SOCK_STREAM, or else we get each address thrice (or more)
* for each possible socket type (tcp,udp,raw...): */
hint.ai_socktype = SOCK_STREAM;
- hint.ai_flags = ai_flags;
+ hint.ai_flags = ai_flags & ~DIE_ON_ERROR;
rc = getaddrinfo(host, NULL, &hint, &result);
- if (rc || !result)
- bb_error_msg_and_die("bad address '%s'", org_host);
- r = xmalloc(offsetof(len_and_sockaddr, sa) + result->ai_addrlen);
- r->len = result->ai_addrlen;
- memcpy(&r->sa, result->ai_addr, result->ai_addrlen);
- set_nport(r, htons(port));
- freeaddrinfo(result);
+ if (rc || !result) {
+ bb_error_msg("bad address '%s'", org_host);
+ if (ai_flags & DIE_ON_ERROR)
+ xfunc_die();
+ goto ret;
+ }
+ used_res = result;
+#if ENABLE_FEATURE_PREFER_IPV4_ADDRESS
+ while (1) {
+ if (used_res->ai_family == AF_INET)
+ break;
+ used_res = used_res->ai_next;
+ if (!used_res) {
+ used_res = result;
+ break;
+ }
+ }
+#endif
+ 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->u.sa, htons(port));
+ ret:
+ if (result)
+ freeaddrinfo(result);
return r;
}
+#if !ENABLE_FEATURE_IPV6
+#define str2sockaddr(host, port, af, ai_flags) str2sockaddr(host, port, ai_flags)
+#endif
+
+#if ENABLE_FEATURE_IPV6
+len_and_sockaddr* FAST_FUNC host_and_af2sockaddr(const char *host, int port, sa_family_t af)
+{
+ return str2sockaddr(host, port, af, 0);
+}
+
+len_and_sockaddr* FAST_FUNC xhost_and_af2sockaddr(const char *host, int port, sa_family_t af)
+{
+ return str2sockaddr(host, port, af, DIE_ON_ERROR);
+}
+#endif
+
+len_and_sockaddr* FAST_FUNC host2sockaddr(const char *host, int port)
+{
+ return str2sockaddr(host, port, AF_UNSPEC, 0);
+}
-len_and_sockaddr* host2sockaddr(const char *host, int port)
+len_and_sockaddr* FAST_FUNC xhost2sockaddr(const char *host, int port)
{
- return str2sockaddr(host, port, 0);
+ return str2sockaddr(host, port, AF_UNSPEC, DIE_ON_ERROR);
}
-static len_and_sockaddr* dotted2sockaddr(const char *host, int port)
+len_and_sockaddr* FAST_FUNC xdotted2sockaddr(const char *host, int port)
{
- return str2sockaddr(host, port, NI_NUMERICHOST);
+ return str2sockaddr(host, port, AF_UNSPEC, AI_NUMERICHOST | DIE_ON_ERROR);
}
-int xsocket_stream(len_and_sockaddr **lsap)
+int FAST_FUNC xsocket_type(len_and_sockaddr **lsap, int family, int sock_type)
{
len_and_sockaddr *lsa;
int fd;
- int len = sizeof(struct sockaddr_in);
- int family = AF_INET;
+ int len;
+ if (family == AF_UNSPEC) {
#if ENABLE_FEATURE_IPV6
- fd = socket(AF_INET6, SOCK_STREAM, 0);
- if (fd >= 0) {
- len = sizeof(struct sockaddr_in6);
- family = AF_INET6;
- } else
+ fd = socket(AF_INET6, sock_type, 0);
+ if (fd >= 0) {
+ family = AF_INET6;
+ goto done;
+ }
#endif
- {
- fd = xsocket(AF_INET, SOCK_STREAM, 0);
+ family = AF_INET;
+ }
+
+ fd = xsocket(family, sock_type, 0);
+
+ len = sizeof(struct sockaddr_in);
+ if (family == AF_UNIX)
+ len = sizeof(struct sockaddr_un);
+#if ENABLE_FEATURE_IPV6
+ if (family == AF_INET6) {
+ done:
+ len = sizeof(struct sockaddr_in6);
}
- lsa = xzalloc(offsetof(len_and_sockaddr, sa) + len);
+#endif
+ lsa = xzalloc(LSA_LEN_SIZE + len);
lsa->len = len;
- lsa->sa.sa_family = family;
+ lsa->u.sa.sa_family = family;
*lsap = lsa;
return fd;
}
-int create_and_bind_stream_or_die(const char *bindaddr, int port)
+int FAST_FUNC xsocket_stream(len_and_sockaddr **lsap)
+{
+ return xsocket_type(lsap, AF_UNSPEC, SOCK_STREAM);
+}
+
+static int create_and_bind_or_die(const char *bindaddr, int port, int sock_type)
{
int fd;
len_and_sockaddr *lsa;
if (bindaddr && bindaddr[0]) {
- lsa = dotted2sockaddr(bindaddr, port);
- /* currently NULL check is in str2sockaddr */
- //if (!lsa)
- // bb_error_msg_and_die("bad address '%s'", bindaddr);
+ lsa = xdotted2sockaddr(bindaddr, port);
/* user specified bind addr dictates family */
- fd = xsocket(lsa->sa.sa_family, SOCK_STREAM, 0);
+ fd = xsocket(lsa->u.sa.sa_family, sock_type, 0);
} else {
- fd = xsocket_stream(&lsa);
+ fd = xsocket_type(&lsa, AF_UNSPEC, sock_type);
+ set_nport(&lsa->u.sa, htons(port));
}
setsockopt_reuseaddr(fd);
- xbind(fd, &lsa->sa, lsa->len);
+ xbind(fd, &lsa->u.sa, lsa->len);
free(lsa);
return fd;
}
-int create_and_connect_stream_or_die(const char *peer, int port)
+int FAST_FUNC create_and_bind_stream_or_die(const char *bindaddr, int port)
+{
+ return create_and_bind_or_die(bindaddr, port, SOCK_STREAM);
+}
+
+int FAST_FUNC create_and_bind_dgram_or_die(const char *bindaddr, int port)
+{
+ return create_and_bind_or_die(bindaddr, port, SOCK_DGRAM);
+}
+
+
+int FAST_FUNC create_and_connect_stream_or_die(const char *peer, int port)
{
int fd;
len_and_sockaddr *lsa;
- lsa = host2sockaddr(peer, port);
- /* currently NULL check is in str2sockaddr */
- //if (!lsa)
- // bb_error_msg_and_die("bad address '%s'", peer);
- fd = xsocket(lsa->sa.sa_family, SOCK_STREAM, 0);
+ lsa = xhost2sockaddr(peer, port);
+ fd = xsocket(lsa->u.sa.sa_family, SOCK_STREAM, 0);
setsockopt_reuseaddr(fd);
- xconnect(fd, &lsa->sa, lsa->len);
+ xconnect(fd, &lsa->u.sa, lsa->len);
free(lsa);
return fd;
}
-int xconnect_stream(const len_and_sockaddr *lsa)
+int FAST_FUNC xconnect_stream(const len_and_sockaddr *lsa)
{
- int fd = xsocket(lsa->sa.sa_family, SOCK_STREAM, 0);
- xconnect(fd, &lsa->sa, lsa->len);
+ int fd = xsocket(lsa->u.sa.sa_family, SOCK_STREAM, 0);
+ xconnect(fd, &lsa->u.sa, lsa->len);
return fd;
}
-static char* sockaddr2str(const struct sockaddr *sa, socklen_t salen, int flags)
+/* We hijack this constant to mean something else */
+/* It doesn't hurt because we will add this bit anyway */
+#define IGNORE_PORT NI_NUMERICSERV
+static char* FAST_FUNC sockaddr2str(const struct sockaddr *sa, int flags)
{
char host[128];
char serv[16];
- int rc = getnameinfo(sa, salen,
+ 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)
+ salen = sizeof(struct sockaddr_in);
+ if (sa->sa_family == AF_INET6)
+ salen = sizeof(struct sockaddr_in6);
+#endif
+ rc = getnameinfo(sa, salen,
host, sizeof(host),
+ /* can do ((flags & IGNORE_PORT) ? NULL : serv) but why bother? */
serv, sizeof(serv),
- flags | NI_NUMERICSERV /* do not resolve port# */
+ /* do not resolve port# into service _name_ */
+ flags | NI_NUMERICSERV
);
- if (rc) return NULL;
-// We probably need to use [%s]:%s for IPv6...
- return xasprintf("%s:%s", host, serv);
+ if (rc)
+ return NULL;
+ if (flags & IGNORE_PORT)
+ return xstrdup(host);
+#if ENABLE_FEATURE_IPV6
+ if (sa->sa_family == AF_INET6) {
+ if (strchr(host, ':')) /* heh, it's not a resolved hostname */
+ return xasprintf("[%s]:%s", host, serv);
+ /*return xasprintf("%s:%s", host, serv);*/
+ /* - fall through instead */
+ }
+#endif
+ /* For now we don't support anything else, so it has to be INET */
+ /*if (sa->sa_family == AF_INET)*/
+ return xasprintf("%s:%s", host, serv);
+ /*return xstrdup(host);*/
+}
+
+char* FAST_FUNC xmalloc_sockaddr2host(const struct sockaddr *sa)
+{
+ return sockaddr2str(sa, 0);
+}
+
+char* FAST_FUNC xmalloc_sockaddr2host_noport(const struct sockaddr *sa)
+{
+ return sockaddr2str(sa, IGNORE_PORT);
}
-char* xmalloc_sockaddr2host(const struct sockaddr *sa, socklen_t salen)
+char* FAST_FUNC xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa)
+{
+ return sockaddr2str(sa, NI_NAMEREQD | IGNORE_PORT);
+}
+#ifndef NI_NUMERICSCOPE
+# define NI_NUMERICSCOPE 0
+#endif
+char* FAST_FUNC xmalloc_sockaddr2dotted(const struct sockaddr *sa)
{
- return sockaddr2str(sa, salen, 0);
+ return sockaddr2str(sa, NI_NUMERICHOST | NI_NUMERICSCOPE);
}
-char* xmalloc_sockaddr2dotted(const struct sockaddr *sa, socklen_t salen)
+char* FAST_FUNC xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa)
{
- return sockaddr2str(sa, salen, NI_NUMERICHOST);
+ return sockaddr2str(sa, NI_NUMERICHOST | NI_NUMERICSCOPE | IGNORE_PORT);
}
projects / oweals / busybox.git / blobdiff