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authorEric Andersen2002-07-03 11:51:44 +0000
committerEric Andersen2002-07-03 11:51:44 +0000
commit0b31586c7113b9b26ca0aeee9247a831b55b308c (patch)
tree7071145eeeea4dd92d18e05fce6d8e710dc67d52 /libbb
parent51b8bd68bb22b1cc5d95e418813c2f08a194ec2b (diff)
downloadbusybox-0b31586c7113b9b26ca0aeee9247a831b55b308c.zip
busybox-0b31586c7113b9b26ca0aeee9247a831b55b308c.tar.gz
A patch from Bart Visscher <magick@linux-fan.com> to add an
xconnect helper routine which does: -address and port resolving -tries to connect to all resolved addresses until connected -uses getaddrinfo, so works for IPv6 too This patch also ports rdate, telnet, and wget to use the new xconnect function. Thanks Bart!
Diffstat (limited to 'libbb')
-rw-r--r--libbb/xconnect.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/libbb/xconnect.c b/libbb/xconnect.c
new file mode 100644
index 0000000..0d670f2
--- /dev/null
+++ b/libbb/xconnect.c
@@ -0,0 +1,78 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Connect to host at port using address resolusion from getaddrinfo
+ *
+ */
+
+#include <unistd.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdlib.h>
+#include "libbb.h"
+
+int xconnect(const char *host, const char *port)
+{
+#if CONFIG_FEATURE_IPV6
+ struct addrinfo hints;
+ struct addrinfo *res;
+ struct addrinfo *addr_info;
+ int error;
+ int s;
+
+ memset(&hints, 0, sizeof(hints));
+ /* set-up hints structure */
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ error = getaddrinfo(host, port, &hints, &res);
+ if (error||!res)
+ perror_msg_and_die(gai_strerror(error));
+ addr_info=res;
+ while (res) {
+ s=socket(res->ai_family, res->ai_socktype, res->ai_protocol);
+ if (s<0)
+ {
+ error=s;
+ res=res->ai_next;
+ continue;
+ }
+ /* try to connect() to res->ai_addr */
+ error = connect(s, res->ai_addr, res->ai_addrlen);
+ if (error >= 0)
+ break;
+ close(s);
+ res=res->ai_next;
+ }
+ freeaddrinfo(addr_info);
+ if (error < 0)
+ {
+ perror_msg_and_die("Unable to connect to remote host (%s)", host);
+ }
+ return s;
+#else
+ struct sockaddr_in s_addr;
+ int s = socket(AF_INET, SOCK_STREAM, 0);
+ struct servent *tserv;
+ int port_nr=atoi(port);
+ struct hostent * he;
+
+ if (port_nr==0 && (tserv = getservbyname(port, "tcp")) != NULL)
+ port_nr = tserv->s_port;
+
+ memset(&s_addr, 0, sizeof(struct sockaddr_in));
+ s_addr.sin_family = AF_INET;
+ s_addr.sin_port = htons(port_nr);
+
+ he = xgethostbyname(host);
+ memcpy(&s_addr.sin_addr, he->h_addr, sizeof s_addr.sin_addr);
+
+ if (connect(s, (struct sockaddr *)&s_addr, sizeof s_addr) < 0)
+ {
+ perror_msg_and_die("Unable to connect to remote host (%s)", host);
+ }
+ return s;
+#endif
+}