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 if (strlen(n) > IF_NAMESIZE-1) {
119 /* Uh, our last resort, an interface name */
120 idx = if_nametoindex(n);
126 a->sockaddr.in6.sin6_family = AF_INET6;
127 a->sockaddr.in6.sin6_port = htons((uint16_t) u);
128 a->sockaddr.in6.sin6_scope_id = idx;
129 a->sockaddr.in6.sin6_addr = in6addr_any;
130 a->size = sizeof(struct sockaddr_in6);
136 if ((r = safe_atou(s, &u)) < 0)
139 if (u <= 0 || u > 0xFFFF)
142 a->sockaddr.in6.sin6_family = AF_INET6;
143 a->sockaddr.in6.sin6_port = htons((uint16_t) u);
144 a->sockaddr.in6.sin6_addr = in6addr_any;
145 a->size = sizeof(struct sockaddr_in6);
152 int socket_address_verify(const SocketAddress *a) {
155 switch (socket_address_family(a)) {
157 if (a->size != sizeof(struct sockaddr_in))
160 if (a->sockaddr.in4.sin_port == 0)
166 if (a->size != sizeof(struct sockaddr_in6))
169 if (a->sockaddr.in6.sin6_port == 0)
175 if (a->size < sizeof(sa_family_t))
178 if (a->size > sizeof(sa_family_t)) {
180 if (a->sockaddr.un.sun_path[0] == 0) {
182 if (a->size != sizeof(struct sockaddr_un))
188 if (!(e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path))))
191 if (a->size != sizeof(sa_family_t) + (e - a->sockaddr.un.sun_path) + 1)
199 return -EAFNOSUPPORT;
203 int socket_address_print(const SocketAddress *a, char **p) {
208 if ((r = socket_address_verify(a)) < 0)
211 switch (socket_address_family(a)) {
215 if (!(ret = new(char, INET_ADDRSTRLEN+1+5+1)))
218 if (!inet_ntop(AF_INET, &a->sockaddr.in4.sin_addr, ret, INET_ADDRSTRLEN)) {
223 sprintf(strchr(ret, 0), ":%u", ntohs(a->sockaddr.in4.sin_port));
231 if (!(ret = new(char, 1+INET6_ADDRSTRLEN+2+5+1)))
235 if (!inet_ntop(AF_INET6, &a->sockaddr.in6.sin6_addr, ret+1, INET6_ADDRSTRLEN)) {
240 sprintf(strchr(ret, 0), "]:%u", ntohs(a->sockaddr.in6.sin6_port));
248 if (a->size <= sizeof(sa_family_t)) {
250 if (!(ret = strdup("<unamed>")))
253 } else if (a->sockaddr.un.sun_path[0] == 0) {
256 /* FIXME: We assume we can print the
257 * socket path here and that it hasn't
258 * more than one NUL byte. That is
259 * actually an invalid assumption */
261 if (!(ret = new(char, sizeof(a->sockaddr.un.sun_path)+1)))
265 memcpy(ret+1, a->sockaddr.un.sun_path+1, sizeof(a->sockaddr.un.sun_path)-1);
266 ret[sizeof(a->sockaddr.un.sun_path)] = 0;
270 if (!(ret = strdup(a->sockaddr.un.sun_path)))
283 int socket_address_listen(const SocketAddress *a, int backlog, SocketAddressBindIPv6Only only, const char *bind_to_device, int *ret) {
288 if ((r = socket_address_verify(a)) < 0)
291 if ((fd = socket(socket_address_family(a), a->type | SOCK_NONBLOCK | SOCK_CLOEXEC, 0)) < 0)
294 if (socket_address_family(a) == AF_INET6 && only != SOCKET_ADDRESS_DEFAULT) {
295 int flag = only == SOCKET_ADDRESS_IPV6_ONLY;
297 if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &flag, sizeof(flag)) < 0)
302 if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, bind_to_device, strlen(bind_to_device)+1) < 0)
306 if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0)
309 if (bind(fd, &a->sockaddr.sa, a->size) < 0)
312 if (a->type == SOCK_STREAM)
313 if (listen(fd, backlog) < 0)