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-rw-r--r--include/libbb.h12
-rw-r--r--libbb/xconnect.c152
-rw-r--r--networking/fakeidentd.c4
-rw-r--r--networking/telnetd.c80
4 files changed, 168 insertions, 80 deletions
diff --git a/include/libbb.h b/include/libbb.h
index 1c82cbbba..c30c5a73d 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -226,6 +226,7 @@ extern int xopen3(const char *pathname, int flags, int mode);
extern off_t xlseek(int fd, off_t offset, int whence);
extern off_t fdlength(int fd);
+
extern int xsocket(int domain, int type, int protocol);
extern void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen);
extern void xlisten(int s, int backlog);
@@ -233,6 +234,17 @@ extern void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen);
extern int xconnect_tcp_v4(struct sockaddr_in *s_addr);
extern struct hostent *xgethostbyname(const char *name);
extern struct hostent *xgethostbyname2(const char *name, int af);
+extern int xsocket_stream_ip4or6(sa_family_t *fp);
+typedef union {
+ struct sockaddr sa;
+ struct sockaddr_in sin;
+#if ENABLE_FEATURE_IPV6
+ struct sockaddr_in6 sin6;
+#endif
+} sockaddr_inet;
+extern int dotted2sockaddr(const char *dotted, struct sockaddr* sp, int socklen);
+extern int create_and_bind_socket_ip4or6(const char *hostaddr, int port);
+
extern char *xstrdup(const char *s);
extern char *xstrndup(const char *s, int n);
diff --git a/libbb/xconnect.c b/libbb/xconnect.c
index 21ec2761a..cf1f9d59a 100644
--- a/libbb/xconnect.c
+++ b/libbb/xconnect.c
@@ -66,3 +66,155 @@ int xconnect_tcp_v4(struct sockaddr_in *s_addr)
xconnect(s, (struct sockaddr*) s_addr, sizeof(*s_addr));
return s;
}
+
+int dotted2sockaddr(const char *dotted, struct sockaddr* sp, int socklen)
+{
+ union {
+ struct in_addr a4;
+#if ENABLE_FEATURE_IPV6
+ struct in6_addr a6;
+#endif
+ } a;
+
+ /* TODO maybe: port spec? like n.n.n.n:nn */
+
+#if ENABLE_FEATURE_IPV6
+ if (socklen >= sizeof(struct sockaddr_in6)
+ && inet_pton(AF_INET6, dotted, &a.a6) > 0
+ ) {
+ ((struct sockaddr_in6*)sp)->sin6_family = AF_INET6;
+ ((struct sockaddr_in6*)sp)->sin6_addr = a.a6;
+ /* ((struct sockaddr_in6*)sp)->sin6_port = */
+ return 0; /* success */
+ }
+#endif
+ if (socklen >= sizeof(struct sockaddr_in)
+ && inet_pton(AF_INET, dotted, &a.a4) > 0
+ ) {
+ ((struct sockaddr_in*)sp)->sin_family = AF_INET;
+ ((struct sockaddr_in*)sp)->sin_addr = a.a4;
+ /* ((struct sockaddr_in*)sp)->sin_port = */
+ return 0; /* success */
+ }
+ return 1;
+}
+
+int xsocket_stream_ip4or6(sa_family_t *fp)
+{
+ int fd;
+#if ENABLE_FEATURE_IPV6
+ fd = socket(AF_INET6, SOCK_STREAM, 0);
+ if (fp) *fp = AF_INET6;
+ if (fd < 0)
+#endif
+ {
+ fd = xsocket(AF_INET, SOCK_STREAM, 0);
+ if (fp) *fp = AF_INET;
+ }
+ return fd;
+}
+
+int create_and_bind_socket_ip4or6(const char *hostaddr, int port)
+{
+ static const int on = 1;
+ int fd;
+ sockaddr_inet sa;
+
+ memset(&sa, 0, sizeof(sa));
+ if (hostaddr && dotted2sockaddr(hostaddr, &sa.sa, sizeof(sa)))
+ bb_show_usage();
+
+ if (!sa.sa.sa_family)
+ fd = xsocket_stream_ip4or6(&sa.sa.sa_family);
+ else /* user specified bind addr dictates family */
+ fd = xsocket(sa.sa.sa_family, SOCK_STREAM, 0);
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+
+ /* if (port >= 0) { */
+#if ENABLE_FEATURE_IPV6
+ if (sa.sa.sa_family == AF_INET6 /* && !sa.sin6.sin6_port */)
+ sa.sin6.sin6_port = htons(port);
+#endif
+ if (sa.sa.sa_family == AF_INET /* && !sa.sin.sin_port */)
+ sa.sin.sin_port = htons(port);
+ /* } */
+
+ xbind(fd, &sa.sa, sizeof(sa));
+ return fd;
+}
+
+int dotted2sockaddr(const char *dotted, struct sockaddr* sp, int socklen)
+{
+ union {
+ struct in_addr a4;
+#if ENABLE_FEATURE_IPV6
+ struct in6_addr a6;
+#endif
+ } a;
+
+ /* TODO maybe: port spec? like n.n.n.n:nn */
+
+#if ENABLE_FEATURE_IPV6
+ if (socklen >= sizeof(struct sockaddr_in6)
+ && inet_pton(AF_INET6, dotted, &a.a6) > 0
+ ) {
+ ((struct sockaddr_in6*)sp)->sin6_family = AF_INET6;
+ ((struct sockaddr_in6*)sp)->sin6_addr = a.a6;
+ /* ((struct sockaddr_in6*)sp)->sin6_port = */
+ return 0; /* success */
+ }
+#endif
+ if (socklen >= sizeof(struct sockaddr_in)
+ && inet_pton(AF_INET, dotted, &a.a4) > 0
+ ) {
+ ((struct sockaddr_in*)sp)->sin_family = AF_INET;
+ ((struct sockaddr_in*)sp)->sin_addr = a.a4;
+ /* ((struct sockaddr_in*)sp)->sin_port = */
+ return 0; /* success */
+ }
+ return 1;
+}
+
+int xsocket_stream_ip4or6(sa_family_t *fp)
+{
+ int fd;
+#if ENABLE_FEATURE_IPV6
+ fd = socket(AF_INET6, SOCK_STREAM, 0);
+ if (fp) *fp = AF_INET6;
+ if (fd < 0)
+#endif
+ {
+ fd = xsocket(AF_INET, SOCK_STREAM, 0);
+ if (fp) *fp = AF_INET;
+ }
+ return fd;
+}
+
+int create_and_bind_socket_ip4or6(const char *hostaddr, int port)
+{
+ static const int on = 1;
+ int fd;
+ sockaddr_inet sa;
+
+ memset(&sa, 0, sizeof(sa));
+ if (hostaddr) {
+ if (dotted2sockaddr(hostaddr, &sa.sa, sizeof(sa)))
+ bb_error_msg_and_die("bad address '%s'", hostaddr);
+ /* user specified bind addr dictates family */
+ fd = xsocket(sa.sa.sa_family, SOCK_STREAM, 0);
+ } else
+ fd = xsocket_stream_ip4or6(&sa.sa.sa_family);
+ setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
+
+ /* if (port >= 0) { */
+#if ENABLE_FEATURE_IPV6
+ if (sa.sa.sa_family == AF_INET6 /* && !sa.sin6.sin6_port */)
+ sa.sin6.sin6_port = htons(port);
+#endif
+ if (sa.sa.sa_family == AF_INET /* && !sa.sin.sin_port */)
+ sa.sin.sin_port = htons(port);
+ /* } */
+
+ xbind(fd, &sa.sa, sizeof(sa));
+ return fd;
+}
diff --git a/networking/fakeidentd.c b/networking/fakeidentd.c
index 18e86c50b..0e543e772 100644
--- a/networking/fakeidentd.c
+++ b/networking/fakeidentd.c
@@ -110,13 +110,13 @@ static void handlexitsigs(int signum)
/* May succeed. If not, won't care. */
static void writepid(uid_t nobody, uid_t nogrp)
{
- char buf[24];
+ char buf[sizeof(int)*3 + 2];
int fd = open(PIDFILE, O_WRONLY|O_CREAT|O_TRUNC, 0664);
if (fd < 0)
return;
- snprintf(buf, 23, "%d\n", getpid());
+ sprintf(buf, "%d\n", getpid());
write(fd, buf, strlen(buf));
fchown(fd, nobody, nogrp);
close(fd);
diff --git a/networking/telnetd.c b/networking/telnetd.c
index d524ac891..604f65c91 100644
--- a/networking/telnetd.c
+++ b/networking/telnetd.c
@@ -354,87 +354,10 @@ free_session(struct tsession *ts)
}
}
-static int
-dotted2sockaddr(const char *dotted, struct sockaddr* sp, int socklen)
-{
- union {
- struct in_addr a4;
-#if ENABLE_FEATURE_IPV6
- struct in6_addr a6;
-#endif
- } a;
-
-#if ENABLE_FEATURE_IPV6
- if (socklen >= sizeof(struct sockaddr_in6)
- && inet_pton(AF_INET6, dotted, &a) > 0
- ) {
- ((struct sockaddr_in6*)sp)->sin6_family = AF_INET6;
- ((struct sockaddr_in6*)sp)->sin6_addr = a.a6;
- } else
-#endif
- if (socklen >= sizeof(struct sockaddr_in)
- && inet_pton(AF_INET, dotted, &a) > 0
- ) {
- ((struct sockaddr_in*)sp)->sin_family = AF_INET;
- ((struct sockaddr_in*)sp)->sin_addr = a.a4;
- } else
- return 1;
-
- return 0; /* success */
-}
-
-static int
-xsocket_stream_ip4or6(sa_family_t *fp)
-{
- int fd = socket(AF_INET6, SOCK_STREAM, 0);
- if (fp) *fp = AF_INET6;
- if (fd < 0) {
- fd = xsocket(AF_INET, SOCK_STREAM, 0);
- if (fp) *fp = AF_INET;
- }
- return fd;
-}
-
-static int
-create_socket(const char *hostaddr, int port)
-{
- static const int on = 1;
- int fd;
- union {
- struct sockaddr sa;
- struct sockaddr_in sin;
-#if ENABLE_FEATURE_IPV6
- struct sockaddr_in6 sin6;
-#endif
- } sa;
-
- memset(&sa, 0, sizeof(sa));
- if (hostaddr && dotted2sockaddr(hostaddr, &sa.sa, sizeof(sa)))
- bb_show_usage();
-
- if (!sa.sa.sa_family)
- fd = xsocket_stream_ip4or6(&sa.sa.sa_family);
- else /* user specified -b ADDR dictates family */
- fd = xsocket(sa.sa.sa_family, SOCK_STREAM, 0);
- setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
-
-#if ENABLE_FEATURE_IPV6
- if (sa.sa.sa_family == AF_INET6)
- sa.sin6.sin6_port = htons(port);
-#endif
- if (sa.sa.sa_family == AF_INET)
- sa.sin.sin_port = htons(port);
-
- xbind(fd, &sa.sa, sizeof(sa));
- xlisten(fd, 1);
- return fd;
-}
-
#else /* !FEATURE_TELNETD_STANDALONE */
/* Never actually called */
void free_session(struct tsession *ts);
-int create_socket(const char *hostaddr, int port);
#endif
@@ -491,7 +414,8 @@ telnetd_main(int argc, char **argv)
if (IS_INETD) {
sessions = make_new_session(0, 1);
} else {
- master_fd = create_socket(opt_bindaddr, portnbr);
+ master_fd = create_and_bind_socket_ip4or6(opt_bindaddr, portnbr);
+ xlisten(master_fd, 1);
if (!(opt & OPT_FOREGROUND))
xdaemon(0, 0);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 19:33:36 +0000