diff options
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/xconnect.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/libbb/xconnect.c b/libbb/xconnect.c index 21ec276..cf1f9d5 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; +} |