diff options
| -rw-r--r-- | libbb/xconnect.c | 78 | ||||
| -rw-r--r-- | networking/telnet.c | 96 | ||||
| -rw-r--r-- | networking/wget.c | 16 | ||||
| -rw-r--r-- | util-linux/rdate.c | 20 |
4 files changed, 93 insertions, 117 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 +} diff --git a/networking/telnet.c b/networking/telnet.c index 53616c0..86d672c 100644 --- a/networking/telnet.c +++ b/networking/telnet.c @@ -36,13 +36,11 @@ #include <errno.h> #include <stdlib.h> #include <stdarg.h> -#include <string.h> #include <signal.h> #include <arpa/telnet.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> -#include <netdb.h> #include "busybox.h" #ifdef CONFIG_FEATURE_AUTOWIDTH @@ -122,19 +120,12 @@ static inline void iacflush(void) } /* Function prototypes */ -static int getport(char * p); -static struct in_addr getserver(char * p); -static void setup_sockaddr_in(struct sockaddr_in * addr, int port); -static int remote_connect(struct in_addr addr, int port); static void rawmode(void); static void cookmode(void); static void do_linemode(void); static void will_charmode(void); static void telopt(byte c); static int subneg(byte c); -#if 0 -static int local_bind(int port); -#endif /* Some globals */ static int one = 1; @@ -584,8 +575,8 @@ static void cookmode(void) extern int telnet_main(int argc, char** argv) { - struct in_addr host; - int port; + char *host; + char *port; int len; #ifdef USE_POLL struct pollfd ufds[2]; @@ -615,11 +606,13 @@ extern int telnet_main(int argc, char** argv) cfmakeraw(&G.termios_raw); if (argc < 2) show_usage(); - port = (argc > 2)? getport(argv[2]): 23; + port = (argc > 2)? argv[2] : "23"; + + host = argv[1]; - host = getserver(argv[1]); + G.netfd = xconnect(host, port); - G.netfd = remote_connect(host, port); + setsockopt(G.netfd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof one); signal(SIGINT, fgotsig); @@ -691,81 +684,6 @@ extern int telnet_main(int argc, char** argv) } } -static int getport(char * p) -{ - unsigned int port = atoi(p); - - if ((unsigned)(port - 1 ) > 65534) - { - error_msg_and_die("%s: bad port number", p); - } - return port; -} - -static struct in_addr getserver(char * host) -{ - struct in_addr addr; - - struct hostent * he; - he = xgethostbyname(host); - memcpy(&addr, he->h_addr, sizeof addr); - - TRACE(1, ("addr: %s\n", inet_ntoa(addr))); - - return addr; -} - -static int create_socket(void) -{ - return socket(AF_INET, SOCK_STREAM, 0); -} - -static void setup_sockaddr_in(struct sockaddr_in * addr, int port) -{ - memset(addr, 0, sizeof(struct sockaddr_in)); - addr->sin_family = AF_INET; - addr->sin_port = htons(port); -} - -#if 0 -static int local_bind(int port) -{ - struct sockaddr_in s_addr; - int s = create_socket(); - - setup_sockaddr_in(&s_addr, port); - - setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one); - - if (bind(s, &s_addr, sizeof s_addr) < 0) - { - char * e = sys_errlist[errno]; - syserrorexit("bind"); - exit(1); - } - listen(s, 1); - - return s; -} -#endif - -static int remote_connect(struct in_addr addr, int port) -{ - struct sockaddr_in s_addr; - int s = create_socket(); - - setup_sockaddr_in(&s_addr, port); - s_addr.sin_addr = addr; - - setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof one); - - if (connect(s, (struct sockaddr *)&s_addr, sizeof s_addr) < 0) - { - perror_msg_and_die("Unable to connect to remote host"); - } - return s; -} - /* Local Variables: c-file-style: "linux" diff --git a/networking/wget.c b/networking/wget.c index 6974c70..c620021 100644 --- a/networking/wget.c +++ b/networking/wget.c @@ -563,24 +563,16 @@ void parse_url(char *url, struct host_info *h) FILE *open_socket(char *host, int port) { - struct sockaddr_in s_in; - struct hostent *hp; int fd; FILE *fp; + char port_str[10]; - memset(&s_in, 0, sizeof(s_in)); - s_in.sin_family = AF_INET; - hp = xgethostbyname(host); - memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length); - s_in.sin_port = htons(port); + snprintf(port_str, sizeof(port_str), "%d", port); + fd=xconnect(host, port_str); /* * Get the server onto a stdio stream. */ - if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) - perror_msg_and_die("socket()"); - if (connect(fd, (struct sockaddr *) &s_in, sizeof(s_in)) < 0) - perror_msg_and_die("connect(%s)", host); if ((fp = fdopen(fd, "r+")) == NULL) perror_msg_and_die("fdopen()"); @@ -826,7 +818,7 @@ progressmeter(int flag) * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $Id: wget.c,v 1.49 2002/05/14 23:36:45 sandman Exp $ + * $Id: wget.c,v 1.50 2002/07/03 11:51:44 andersen Exp $ */ diff --git a/util-linux/rdate.c b/util-linux/rdate.c index 04a7612..df7d7bb 100644 --- a/util-linux/rdate.c +++ b/util-linux/rdate.c @@ -39,26 +39,14 @@ static const int RFC_868_BIAS = 2208988800UL; static time_t askremotedate(const char *host) { - struct hostent *h; - struct sockaddr_in s_in; - struct servent *tserv; unsigned long int nett, localt; + const char *port="37"; int fd; - h = xgethostbyname(host); /* get the IP addr */ - memcpy(&s_in.sin_addr, h->h_addr, sizeof(s_in.sin_addr)); + if (getservbyname("time", "tcp") != NULL) + port="time"; - s_in.sin_port = htons(37); /* find port # */ - if ((tserv = getservbyname("time", "tcp")) != NULL) - s_in.sin_port = tserv->s_port; - - s_in.sin_family = AF_INET; - - if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) /* get net connection */ - perror_msg_and_die("socket"); - - if (connect(fd, (struct sockaddr *)&s_in, sizeof(s_in)) < 0) /* connect to time server */ - perror_msg_and_die("%s", host); + fd = xconnect(host, port); if (read(fd, (void *)&nett, 4) != 4) /* read time from server */ error_msg_and_die("%s did not send the complete time", host); |