1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
14 #include "socket-util.h"
16 int socket_address_parse(SocketAddress *a, const char *s) {
25 a->type = SOCK_STREAM;
28 /* IPv6 in [x:.....:z]:p notation */
30 if (!(e = strchr(s+1, ']')))
33 if (!(n = strndup(s+1, e-s-1)))
37 if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0) {
39 return errno != 0 ? -errno : -EINVAL;
49 if ((r = safe_atou(e, &u)) < 0)
52 if (u <= 0 || u > 0xFFFF)
55 a->sockaddr.in6.sin6_family = AF_INET6;
56 a->sockaddr.in6.sin6_port = htons((uint16_t) u);
57 a->size = sizeof(struct sockaddr_in6);
59 } else if (*s == '/') {
65 if (l >= sizeof(a->sockaddr.un.sun_path))
68 a->sockaddr.un.sun_family = AF_UNIX;
69 memcpy(a->sockaddr.un.sun_path, s, l);
70 a->size = sizeof(sa_family_t) + l + 1;
72 } else if (*s == '=') {
73 /* Abstract AF_UNIX socket */
77 if (l >= sizeof(a->sockaddr.un.sun_path) - 1)
80 a->sockaddr.un.sun_family = AF_UNIX;
81 memcpy(a->sockaddr.un.sun_path+1, s+1, l);
82 a->size = sizeof(struct sockaddr_un);
86 if ((e = strchr(s, ':'))) {
89 if ((r = safe_atou(e+1, &u)) < 0)
92 if (u <= 0 || u > 0xFFFF)
95 if (!(n = strndup(s, e-s)))
98 /* IPv4 in w.x.y.z:p notation? */
99 if ((r = inet_pton(AF_INET, n, &a->sockaddr.in4.sin_addr)) < 0) {
105 /* Gotcha, it's a traditional IPv4 address */
108 a->sockaddr.in4.sin_family = AF_INET;
109 a->sockaddr.in4.sin_port = htons((uint16_t) u);
110 a->size = sizeof(struct sockaddr_in);
114 /* Uh, our last resort, an interface name */
115 idx = if_nametoindex(n);
121 a->sockaddr.in6.sin6_family = AF_INET6;
122 a->sockaddr.in6.sin6_port = htons((uint16_t) u);
123 a->sockaddr.in6.sin6_scope_id = idx;
124 a->sockaddr.in6.sin6_addr = in6addr_any;
125 a->size = sizeof(struct sockaddr_in6);
130 if ((r = safe_atou(s, &u)) < 0)
133 if (u <= 0 || u > 0xFFFF)
136 a->sockaddr.in6.sin6_family = AF_INET6;
137 a->sockaddr.in6.sin6_port = htons((uint16_t) u);
138 a->sockaddr.in6.sin6_addr = in6addr_any;
139 a->size = sizeof(struct sockaddr_in6);
146 int socket_address_verify(const SocketAddress *a) {
149 switch (socket_address_family(a)) {
151 if (a->size != sizeof(struct sockaddr_in))
154 if (a->sockaddr.in4.sin_port == 0)
160 if (a->size != sizeof(struct sockaddr_in6))
163 if (a->sockaddr.in6.sin6_port == 0)
169 if (a->size < sizeof(sa_family_t))
172 if (a->size > sizeof(sa_family_t)) {
174 if (a->sockaddr.un.sun_path[0] == 0) {
176 if (a->size != sizeof(struct sockaddr_un))
182 if (!(e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path))))
185 if (a->size != sizeof(sa_family_t) + (e - a->sockaddr.un.sun_path) + 1)
193 return -EAFNOSUPPORT;
197 int socket_address_print(const SocketAddress *a, char **p) {
202 if ((r = socket_address_verify(a)) < 0)
205 switch (socket_address_family(a)) {
209 if (!(ret = new(char, INET_ADDRSTRLEN+1+5+1)))
212 if (!inet_ntop(AF_INET, &a->sockaddr.in4.sin_addr, ret, INET_ADDRSTRLEN)) {
217 sprintf(strchr(ret, 0), ":%u", ntohs(a->sockaddr.in4.sin_port));
225 if (!(ret = new(char, 1+INET6_ADDRSTRLEN+2+5+1)))
229 if (!inet_ntop(AF_INET6, &a->sockaddr.in6.sin6_addr, ret+1, INET6_ADDRSTRLEN)) {
234 sprintf(strchr(ret, 0), "]:%u", ntohs(a->sockaddr.in6.sin6_port));
242 if (a->size <= sizeof(sa_family_t)) {
244 if (!(ret = strdup("<unamed>")))
247 } else if (a->sockaddr.un.sun_path[0] == 0) {
250 /* FIXME: We assume we can print the
251 * socket path here and that it hasn't
252 * more than one NUL byte. That is
253 * actually an invalid assumption */
255 if (!(ret = new(char, sizeof(a->sockaddr.un.sun_path)+1)))
259 memcpy(ret+1, a->sockaddr.un.sun_path+1, sizeof(a->sockaddr.un.sun_path)-1);
260 ret[sizeof(a->sockaddr.un.sun_path)] = 0;
264 if (!(ret = strdup(a->sockaddr.un.sun_path)))
277 int socket_address_listen(const SocketAddress *a, int backlog, SocketAddressBindIPv6Only only, int *ret) {
282 if ((r = socket_address_verify(a)) < 0)
285 if ((fd = socket(socket_address_family(a), a->type | SOCK_NONBLOCK | SOCK_CLOEXEC, 0)) < 0)
288 if (socket_address_family(a) == AF_INET6 && only != SOCKET_ADDRESS_DEFAULT) {
289 int flag = only == SOCKET_ADDRESS_IPV6_ONLY;
291 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &flag, sizeof(flag)) < 0) {
297 if (bind(fd, &a->sockaddr.sa, a->size) < 0) {
302 if (a->type == SOCK_STREAM)
303 if (listen(fd, backlog) < 0) {