1 /* vi: set sw=4 ts=4: */
5 * Connect to host at port using address resolution from getaddrinfo
11 /* Return network byte ordered port number for a service.
12 * If "port" is a number use it as the port.
13 * If "port" is a name it is looked up in /etc/services, if it isnt found return
16 unsigned short bb_lookup_port(const char *port, const char *protocol, unsigned short default_port)
18 unsigned short port_nr = htons(default_port);
24 /* Since this is a lib function, we're not allowed to reset errno to 0.
25 * Doing so could break an app that is deferring checking of errno. */
28 port_long = strtol(port, &endptr, 10);
29 if (errno != 0 || *endptr!='\0' || endptr==port || port_long < 0 || port_long > 65535) {
30 struct servent *tserv = getservbyname(port, protocol);
32 port_nr = tserv->s_port;
35 port_nr = htons(port_long);
42 void bb_lookup_host(struct sockaddr_in *s_in, const char *host)
46 memset(s_in, 0, sizeof(struct sockaddr_in));
47 s_in->sin_family = AF_INET;
48 he = xgethostbyname(host);
49 memcpy(&(s_in->sin_addr), he->h_addr_list[0], he->h_length);
52 void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen)
54 if (connect(s, s_addr, addrlen) < 0) {
55 if (ENABLE_FEATURE_CLEAN_UP) close(s);
56 if (s_addr->sa_family == AF_INET)
57 bb_perror_msg_and_die("cannot connect to remote host (%s)",
58 inet_ntoa(((struct sockaddr_in *)s_addr)->sin_addr));
59 bb_perror_msg_and_die("cannot connect to remote host");
63 int xconnect_tcp_v4(struct sockaddr_in *s_addr)
65 int s = xsocket(AF_INET, SOCK_STREAM, 0);
66 xconnect(s, (struct sockaddr*) s_addr, sizeof(*s_addr));
70 int dotted2sockaddr(const char *dotted, struct sockaddr* sp, int socklen)
74 #if ENABLE_FEATURE_IPV6
79 /* TODO maybe: port spec? like n.n.n.n:nn */
81 #if ENABLE_FEATURE_IPV6
82 if (socklen >= sizeof(struct sockaddr_in6)
83 && inet_pton(AF_INET6, dotted, &a.a6) > 0
85 ((struct sockaddr_in6*)sp)->sin6_family = AF_INET6;
86 ((struct sockaddr_in6*)sp)->sin6_addr = a.a6;
87 /* ((struct sockaddr_in6*)sp)->sin6_port = */
88 return 0; /* success */
91 if (socklen >= sizeof(struct sockaddr_in)
92 && inet_pton(AF_INET, dotted, &a.a4) > 0
94 ((struct sockaddr_in*)sp)->sin_family = AF_INET;
95 ((struct sockaddr_in*)sp)->sin_addr = a.a4;
96 /* ((struct sockaddr_in*)sp)->sin_port = */
97 return 0; /* success */
102 int xsocket_stream_ip4or6(sa_family_t *fp)
105 #if ENABLE_FEATURE_IPV6
106 fd = socket(AF_INET6, SOCK_STREAM, 0);
107 if (fp) *fp = AF_INET6;
111 fd = xsocket(AF_INET, SOCK_STREAM, 0);
112 if (fp) *fp = AF_INET;
117 int create_and_bind_socket_ip4or6(const char *hostaddr, int port)
119 static const int on = 1;
123 memset(&sa, 0, sizeof(sa));
124 if (hostaddr && dotted2sockaddr(hostaddr, &sa.sa, sizeof(sa)))
127 if (!sa.sa.sa_family)
128 fd = xsocket_stream_ip4or6(&sa.sa.sa_family);
129 else /* user specified bind addr dictates family */
130 fd = xsocket(sa.sa.sa_family, SOCK_STREAM, 0);
131 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
133 /* if (port >= 0) { */
134 #if ENABLE_FEATURE_IPV6
135 if (sa.sa.sa_family == AF_INET6 /* && !sa.sin6.sin6_port */)
136 sa.sin6.sin6_port = htons(port);
138 if (sa.sa.sa_family == AF_INET /* && !sa.sin.sin_port */)
139 sa.sin.sin_port = htons(port);
142 xbind(fd, &sa.sa, sizeof(sa));
146 int dotted2sockaddr(const char *dotted, struct sockaddr* sp, int socklen)
150 #if ENABLE_FEATURE_IPV6
155 /* TODO maybe: port spec? like n.n.n.n:nn */
157 #if ENABLE_FEATURE_IPV6
158 if (socklen >= sizeof(struct sockaddr_in6)
159 && inet_pton(AF_INET6, dotted, &a.a6) > 0
161 ((struct sockaddr_in6*)sp)->sin6_family = AF_INET6;
162 ((struct sockaddr_in6*)sp)->sin6_addr = a.a6;
163 /* ((struct sockaddr_in6*)sp)->sin6_port = */
164 return 0; /* success */
167 if (socklen >= sizeof(struct sockaddr_in)
168 && inet_pton(AF_INET, dotted, &a.a4) > 0
170 ((struct sockaddr_in*)sp)->sin_family = AF_INET;
171 ((struct sockaddr_in*)sp)->sin_addr = a.a4;
172 /* ((struct sockaddr_in*)sp)->sin_port = */
173 return 0; /* success */
178 int xsocket_stream_ip4or6(sa_family_t *fp)
181 #if ENABLE_FEATURE_IPV6
182 fd = socket(AF_INET6, SOCK_STREAM, 0);
183 if (fp) *fp = AF_INET6;
187 fd = xsocket(AF_INET, SOCK_STREAM, 0);
188 if (fp) *fp = AF_INET;
193 int create_and_bind_socket_ip4or6(const char *hostaddr, int port)
195 static const int on = 1;
199 memset(&sa, 0, sizeof(sa));
201 if (dotted2sockaddr(hostaddr, &sa.sa, sizeof(sa)))
202 bb_error_msg_and_die("bad address '%s'", hostaddr);
203 /* user specified bind addr dictates family */
204 fd = xsocket(sa.sa.sa_family, SOCK_STREAM, 0);
206 fd = xsocket_stream_ip4or6(&sa.sa.sa_family);
207 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
209 /* if (port >= 0) { */
210 #if ENABLE_FEATURE_IPV6
211 if (sa.sa.sa_family == AF_INET6 /* && !sa.sin6.sin6_port */)
212 sa.sin6.sin6_port = htons(port);
214 if (sa.sa.sa_family == AF_INET /* && !sa.sin.sin_port */)
215 sa.sin.sin_port = htons(port);
218 xbind(fd, &sa.sa, sizeof(sa));