-/*
- Copyright (C) Andrew Tridgell 1998
+/* -*- c-file-style: "linux" -*-
+
+ Copyright (C) 1998-2000 by Andrew Tridgell
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
/* open a socket to a tcp remote host with the specified port
based on code from Warren
proxy support by Stephen Rothwell */
-int open_socket_out(char *host, int port)
+int open_socket_out(char *host, int port, struct in_addr *address)
{
int type = SOCK_STREAM;
struct sockaddr_in sock_out;
+ struct sockaddr_in sock;
int res;
struct hostent *hp;
char *h;
sock_out.sin_port = htons(p);
sock_out.sin_family = PF_INET;
+ if (address) {
+ sock.sin_addr = *address;
+ sock.sin_port = 0;
+ sock.sin_family = hp->h_addrtype;
+ bind(res, (struct sockaddr * ) &sock,sizeof(sock));
+ }
+
if (connect(res,(struct sockaddr *)&sock_out,sizeof(sock_out))) {
rprintf(FERROR,"failed to connect to %s - %s\n", h, strerror(errno));
close(res);
return -1;
}
- set_nonblocking(res);
-
return res;
}
/****************************************************************************
open a socket of the specified type, port and address for incoming data
****************************************************************************/
-static int open_socket_in(int type, int port)
+static int open_socket_in(int type, int port, struct in_addr *address)
{
struct hostent *hp;
struct sockaddr_in sock;
memcpy((char *)&sock.sin_addr,(char *)hp->h_addr, hp->h_length);
sock.sin_port = htons(port);
sock.sin_family = hp->h_addrtype;
- sock.sin_addr.s_addr = INADDR_ANY;
+ if (address) {
+ sock.sin_addr = *address;
+ } else {
+ sock.sin_addr.s_addr = INADDR_ANY;
+ }
res = socket(hp->h_addrtype, type, 0);
if (res == -1) {
rprintf(FERROR,"socket failed\n");
}
-/****************************************************************************
-determine if a file descriptor is in fact a socket
-****************************************************************************/
+/*
+ * Determine if a file descriptor is in fact a socket
+ */
int is_a_socket(int fd)
{
- int v,l;
+ int v, l;
l = sizeof(int);
+
+ /* Parameters to getsockopt, setsockopt etc are very
+ * unstandardized across platforms, so don't be surprised if
+ * there are compiler warnings on e.g. SCO OpenSwerver. It
+ * seems they all eventually get the right idea.
+ *
+ * Debian says: ``The fifth argument of getsockopt and
+ * setsockopt is in reality an int [*] (and this is what BSD
+ * 4.* and libc4 and libc5 have). Some POSIX confusion
+ * resulted in the present socklen_t. The draft standard has
+ * not been adopted yet, but glibc2 already follows it and
+ * also has socklen_t [*]. See also accept(2).''
+ *
+ * We now return to your regularly scheduled programming. */
return(getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&v, &l) == 0);
}
void start_accept_loop(int port, int (*fn)(int ))
{
int s;
+ extern struct in_addr socket_address;
/* open an incoming socket */
- s = open_socket_in(SOCK_STREAM, port);
+ s = open_socket_in(SOCK_STREAM, port, &socket_address);
if (s == -1)
exit_cleanup(RERR_SOCKETIO);
struct sockaddr addr;
int in_addrlen = sizeof(addr);
+ /* close log file before the potentially very long select so
+ file can be trimmed by another process instead of growing
+ forever */
+ log_close();
+
FD_ZERO(&fds);
FD_SET(s, &fds);
if(!FD_ISSET(s, &fds)) continue;
+ /* See note above prototypes. */
fd = accept(s,&addr,&in_addrlen);
if (fd == -1) continue;
if (fork()==0) {
close(s);
- set_nonblocking(fd);
+ /* open log file in child before possibly giving
+ up privileges */
+ log_open();
_exit(fn(fd));
}
return name_buf;
}
+
+/*******************************************************************
+convert a string to an IP address. The string can be a name or
+dotted decimal number
+ ******************************************************************/
+struct in_addr *ip_address(const char *str)
+{
+ static struct in_addr ret;
+ struct hostent *hp;
+
+ /* try as an IP address */
+ if (inet_aton(str, &ret) != 0) {
+ return &ret;
+ }
+
+ /* otherwise assume it's a network name of some sort and use
+ gethostbyname */
+ if ((hp = gethostbyname(str)) == 0) {
+ rprintf(FERROR, "gethostbyname: Unknown host. %s\n",str);
+ return NULL;
+ }
+
+ if (hp->h_addr == NULL) {
+ rprintf(FERROR, "gethostbyname: host address is invalid for host %s\n",str);
+ return NULL;
+ }
+
+ if (hp->h_length > sizeof(ret)) {
+ rprintf(FERROR, "gethostbyname: host address is too large\n");
+ return NULL;
+ }
+
+ memcpy(&ret.s_addr, hp->h_addr, hp->h_length);
+
+ return(&ret);
+}