/*
* Utility routines.
*
- * Connect to host at port using address resolusion from getaddrinfo
+ * Connect to host at port using address resolution from getaddrinfo
*
*/
-#include <unistd.h>
-#include <string.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <errno.h>
-#include <netdb.h>
-#include <sys/socket.h>
#include <netinet/in.h>
-#include <arpa/inet.h>
#include "libbb.h"
-/* Return network byte ordered port number for a service.
+void FAST_FUNC setsockopt_reuseaddr(int fd)
+{
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &const_int_1, sizeof(const_int_1));
+}
+int FAST_FUNC setsockopt_broadcast(int fd)
+{
+ return setsockopt(fd, SOL_SOCKET, SO_BROADCAST, &const_int_1, sizeof(const_int_1));
+}
+
+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",
+ inet_ntoa(((struct sockaddr_in *)s_addr)->sin_addr));
+ bb_perror_msg_and_die("cannot 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 short bb_lookup_port(const char *port, const char *protocol, unsigned short default_port)
+ * default_port */
+unsigned FAST_FUNC bb_lookup_port(const char *port, const char *protocol, unsigned default_port)
{
- unsigned short port_nr = htons(default_port);
+ unsigned port_nr = default_port;
if (port) {
- char *endptr;
int old_errno;
- long port_long;
/* Since this is a lib function, we're not allowed to reset errno to 0.
* Doing so could break an app that is deferring checking of errno. */
old_errno = errno;
- errno = 0;
- port_long = strtol(port, &endptr, 10);
- if (errno != 0 || *endptr!='\0' || endptr==port || port_long < 0 || port_long > 65535) {
+ port_nr = bb_strtou(port, NULL, 10);
+ if (errno || port_nr > 65535) {
struct servent *tserv = getservbyname(port, protocol);
- if (tserv) {
- port_nr = tserv->s_port;
- }
- } else {
- port_nr = htons(port_long);
+ port_nr = default_port;
+ if (tserv)
+ port_nr = ntohs(tserv->s_port);
}
errno = old_errno;
}
- return port_nr;
+ return (uint16_t)port_nr;
}
-void bb_lookup_host(struct sockaddr_in *s_in, const char *host)
+
+/* "Old" networking API - only IPv4 */
+
+/*
+void FAST_FUNC bb_lookup_host(struct sockaddr_in *s_in, const char *host)
{
struct hostent *he;
memcpy(&(s_in->sin_addr), he->h_addr_list[0], he->h_length);
}
-int xconnect(struct sockaddr_in *s_addr)
+
+int FAST_FUNC xconnect_tcp_v4(struct sockaddr_in *s_addr)
{
- int s = socket(AF_INET, SOCK_STREAM, 0);
- if (connect(s, (struct sockaddr_in *)s_addr, sizeof(struct sockaddr_in)) < 0)
- {
- bb_perror_msg_and_die("Unable to connect to remote host (%s)",
- inet_ntoa(s_addr->sin_addr));
- }
+ int s = xsocket(AF_INET, SOCK_STREAM, 0);
+ xconnect(s, (struct sockaddr*) s_addr, sizeof(*s_addr));
return s;
}
+*/
+
+/* "New" networking API */
+
+
+int FAST_FUNC get_nport(const struct sockaddr *sa)
+{
+#if ENABLE_FEATURE_IPV6
+ if (sa->sa_family == AF_INET6) {
+ return ((struct sockaddr_in6*)sa)->sin6_port;
+ }
+#endif
+ if (sa->sa_family == AF_INET) {
+ return ((struct sockaddr_in*)sa)->sin_port;
+ }
+ /* What? UNIX socket? IPX?? :) */
+ return -1;
+}
+
+void FAST_FUNC set_nport(len_and_sockaddr *lsa, unsigned port)
+{
+#if ENABLE_FEATURE_IPV6
+ if (lsa->u.sa.sa_family == AF_INET6) {
+ lsa->u.sin6.sin6_port = port;
+ return;
+ }
+#endif
+ if (lsa->u.sa.sa_family == AF_INET) {
+ lsa->u.sin.sin_port = port;
+ return;
+ }
+ /* What? UNIX socket? IPX?? :) */
+}
+
+/* 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,
+USE_FEATURE_IPV6(sa_family_t af,)
+ int ai_flags)
+{
+ int rc;
+ len_and_sockaddr *r = NULL;
+ struct addrinfo *result = NULL;
+ struct addrinfo *used_res;
+ const char *org_host = host; /* only for error msg */
+ const char *cp;
+ struct addrinfo hint;
+
+ /* 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("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) {
+ /* There is more than one ':' (e.g. "::1") */
+ cp = NULL; /* it's not a port spec */
+ }
+ }
+ if (cp) { /* points to ":" or "]:" */
+ int sz = cp - host + 1;
+ host = safe_strncpy(alloca(sz), host, sz);
+ if (ENABLE_FEATURE_IPV6 && *cp != ':')
+ cp++; /* skip ']' */
+ cp++; /* skip ':' */
+ 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;
+ }
+ }
+
+ 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;
+ hint.ai_flags = ai_flags & ~DIE_ON_ERROR;
+ rc = getaddrinfo(host, NULL, &hint, &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(offsetof(len_and_sockaddr, u.sa) + used_res->ai_addrlen);
+ r->len = used_res->ai_addrlen;
+ memcpy(&r->u.sa, used_res->ai_addr, used_res->ai_addrlen);
+ set_nport(r, htons(port));
+ ret:
+ 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* FAST_FUNC xhost2sockaddr(const char *host, int port)
+{
+ return str2sockaddr(host, port, AF_UNSPEC, DIE_ON_ERROR);
+}
+
+len_and_sockaddr* FAST_FUNC xdotted2sockaddr(const char *host, int port)
+{
+ return str2sockaddr(host, port, AF_UNSPEC, AI_NUMERICHOST | DIE_ON_ERROR);
+}
+
+#undef xsocket_type
+int FAST_FUNC xsocket_type(len_and_sockaddr **lsap, USE_FEATURE_IPV6(int family,) int sock_type)
+{
+ SKIP_FEATURE_IPV6(enum { family = AF_INET };)
+ len_and_sockaddr *lsa;
+ int fd;
+ int len;
+
+#if ENABLE_FEATURE_IPV6
+ if (family == AF_UNSPEC) {
+ fd = socket(AF_INET6, sock_type, 0);
+ if (fd >= 0) {
+ family = AF_INET6;
+ goto done;
+ }
+ family = AF_INET;
+ }
+#endif
+ fd = xsocket(family, sock_type, 0);
+ len = sizeof(struct sockaddr_in);
+#if ENABLE_FEATURE_IPV6
+ if (family == AF_INET6) {
+ done:
+ len = sizeof(struct sockaddr_in6);
+ }
+#endif
+ lsa = xzalloc(offsetof(len_and_sockaddr, u.sa) + len);
+ lsa->len = len;
+ lsa->u.sa.sa_family = family;
+ *lsap = lsa;
+ return fd;
+}
+
+int FAST_FUNC xsocket_stream(len_and_sockaddr **lsap)
+{
+ return xsocket_type(lsap, USE_FEATURE_IPV6(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 = xdotted2sockaddr(bindaddr, port);
+ /* 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);
+ set_nport(lsa, htons(port));
+ }
+ setsockopt_reuseaddr(fd);
+ xbind(fd, &lsa->u.sa, lsa->len);
+ free(lsa);
+ return fd;
+}
+
+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 = xhost2sockaddr(peer, port);
+ fd = xsocket(lsa->u.sa.sa_family, SOCK_STREAM, 0);
+ setsockopt_reuseaddr(fd);
+ xconnect(fd, &lsa->u.sa, lsa->len);
+ free(lsa);
+ return fd;
+}
+
+int FAST_FUNC xconnect_stream(const len_and_sockaddr *lsa)
+{
+ int fd = xsocket(lsa->u.sa.sa_family, SOCK_STREAM, 0);
+ xconnect(fd, &lsa->u.sa, lsa->len);
+ return fd;
+}
+
+/* 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;
+ socklen_t salen;
+
+ 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),
+ /* do not resolve port# into service _name_ */
+ flags | NI_NUMERICSERV
+ );
+ 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* FAST_FUNC xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa)
+{
+ return sockaddr2str(sa, NI_NAMEREQD | IGNORE_PORT);
+}
+char* FAST_FUNC xmalloc_sockaddr2dotted(const struct sockaddr *sa)
+{
+ return sockaddr2str(sa, NI_NUMERICHOST);
+}
+
+char* FAST_FUNC xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa)
+{
+ return sockaddr2str(sa, NI_NUMERICHOST | IGNORE_PORT);
+}
projects / oweals / busybox.git / blobdiff