+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+
+#include "macro.h"
+#include "util.h"
+#include "socket-util.h"
+
+int address_parse(Address *a, const char *s) {
+ int r;
+ char *e, *n;
+ unsigned u;
+
+ assert(a);
+ assert(s);
+
+ memset(a, 0, sizeof(*a));
+
+ if (*s == '[') {
+ /* IPv6 in [x:.....:z]:p notation */
+
+ if (!(e = strchr(s+1, ']')))
+ return -EINVAL;
+
+ if (!(n = strndup(s+1, e-s-1)))
+ return -ENOMEM;
+
+ errno = 0;
+ if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0) {
+ free(n);
+ return errno != 0 ? -errno : -EINVAL;
+ }
+
+ free(n);
+
+ e++;
+ if (*e != ':')
+ return -EINVAL;
+
+ e++;
+ if ((r = safe_atou(e, &u)) < 0)
+ return r;
+
+ if (u <= 0 || u > 0xFFFF)
+ return -EINVAL;
+
+ a->sockaddr.in6.sin6_family = AF_INET6;
+ a->sockaddr.in6.sin6_port = htons((uint16_t) u);
+ a->size = sizeof(struct sockaddr_in6);
+ a->bind_ipv6_only = true;
+
+ } else if (*s == '/') {
+ /* AF_UNIX socket */
+
+ size_t l;
+
+ l = strlen(s);
+ if (l >= sizeof(a->sockaddr.un.sun_path))
+ return -EINVAL;
+
+ a->sockaddr.un.sun_family = AF_UNIX;
+ memcpy(a->sockaddr.un.sun_path, s, l);
+ a->size = sizeof(sa_family_t) + l + 1;
+
+ } else if (*s == '=') {
+ /* Abstract AF_UNIX socket */
+ size_t l;
+
+ l = strlen(s+1);
+ if (l >= sizeof(a->sockaddr.un.sun_path) - 1)
+ return -EINVAL;
+
+ a->sockaddr.un.sun_family = AF_UNIX;
+ memcpy(a->sockaddr.un.sun_path+1, s+1, l);
+ a->size = sizeof(struct sockaddr_un);
+
+ } else {
+
+ if ((e = strchr(s, ':'))) {
+
+ /* IPv4 in w.x.y.z:p notation */
+ if (!(n = strndup(s, e-s)))
+ return -ENOMEM;
+
+ errno = 0;
+ if (inet_pton(AF_INET, n, &a->sockaddr.in4.sin_addr) <= 0) {
+ free(n);
+ return errno != 0 ? -errno : -EINVAL;
+ }
+
+ free(n);
+
+ e++;
+ if ((r = safe_atou(e, &u)) < 0)
+ return r;
+
+ if (u <= 0 || u > 0xFFFF)
+ return -EINVAL;
+
+ a->sockaddr.in4.sin_family = AF_INET;
+ a->sockaddr.in4.sin_port = htons((uint16_t) u);
+ a->size = sizeof(struct sockaddr_in);
+ } else {
+
+ /* Just a port */
+ if ((r = safe_atou(s, &u)) < 0)
+ return r;
+
+ if (u <= 0 || u > 0xFFFF)
+ return -EINVAL;
+
+ a->sockaddr.in6.sin6_family = AF_INET6;
+ memcpy(&a->sockaddr.in6.sin6_addr, &in6addr_any, INET6_ADDRSTRLEN);
+ a->sockaddr.in6.sin6_port = htons((uint16_t) u);
+ a->size = sizeof(struct sockaddr_in6);
+ }
+ }
+
+ return 0;
+}
+
+int address_verify(const Address *a) {
+ assert(a);
+
+ switch (address_family(a)) {
+ case AF_INET:
+ if (a->size != sizeof(struct sockaddr_in))
+ return -EINVAL;
+
+ if (a->sockaddr.in4.sin_port == 0)
+ return -EINVAL;
+
+ return 0;
+
+ case AF_INET6:
+ if (a->size != sizeof(struct sockaddr_in6))
+ return -EINVAL;
+
+ if (a->sockaddr.in6.sin6_port == 0)
+ return -EINVAL;
+
+ return 0;
+
+ case AF_UNIX:
+ if (a->size < sizeof(sa_family_t))
+ return -EINVAL;
+
+ if (a->size > sizeof(sa_family_t)) {
+
+ if (a->sockaddr.un.sun_path[0] == 0) {
+ /* abstract */
+ if (a->size != sizeof(struct sockaddr_un))
+ return -EINVAL;
+ } else {
+ char *e;
+
+ /* path */
+ if (!(e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path))))
+ return -EINVAL;
+
+ if (a->size != sizeof(sa_family_t) + (e - a->sockaddr.un.sun_path) + 1)
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+
+ default:
+ return -EAFNOSUPPORT;
+ }
+}
+
+int address_print(const Address *a, char **p) {
+ int r;
+ assert(a);
+ assert(p);
+
+ if ((r = address_verify(a)) < 0)
+ return r;
+
+ switch (address_family(a)) {
+ case AF_INET: {
+ char *ret;
+
+ if (!(ret = new(char, INET_ADDRSTRLEN+1+5+1)))
+ return -ENOMEM;
+
+ if (!inet_ntop(AF_INET, &a->sockaddr.in4.sin_addr, ret, INET_ADDRSTRLEN)) {
+ free(ret);
+ return -errno;
+ }
+
+ sprintf(strchr(ret, 0), ":%u", ntohs(a->sockaddr.in4.sin_port));
+ *p = ret;
+ return 0;
+ }
+
+ case AF_INET6: {
+ char *ret;
+
+ if (!(ret = new(char, 1+INET6_ADDRSTRLEN+2+5+1)))
+ return -ENOMEM;
+
+ ret[0] = '[';
+ if (!inet_ntop(AF_INET6, &a->sockaddr.in6.sin6_addr, ret+1, INET6_ADDRSTRLEN)) {
+ free(ret);
+ return -errno;
+ }
+
+ sprintf(strchr(ret, 0), "]:%u", ntohs(a->sockaddr.in6.sin6_port));
+ *p = ret;
+ return 0;
+ }
+
+ case AF_UNIX: {
+ char *ret;
+
+ if (a->size <= sizeof(sa_family_t)) {
+
+ if (!(ret = strdup("<unamed>")))
+ return -ENOMEM;
+
+ } else if (a->sockaddr.un.sun_path[0] == 0) {
+ /* abstract */
+
+ /* FIXME: We assume we can print the
+ * socket path here and that it hasn't
+ * more than one NUL byte. That is
+ * actually an invalid assumption */
+
+ if (!(ret = new(char, sizeof(a->sockaddr.un.sun_path)+1)))
+ return -ENOMEM;
+
+ ret[0] = '=';
+ memcpy(ret+1, a->sockaddr.un.sun_path+1, sizeof(a->sockaddr.un.sun_path)-1);
+ ret[sizeof(a->sockaddr.un.sun_path)] = 0;
+
+ } else {
+
+ if (!(ret = strdup(a->sockaddr.un.sun_path)))
+ return -ENOMEM;
+ }
+
+ *p = ret;
+ return 0;
+ }
+
+ default:
+ return -EINVAL;
+ }
+}
+
+int address_listen(const Address *a, int backlog) {
+ int r, fd;
+ assert(a);
+
+ if ((r = address_verify(a)) < 0)
+ return r;
+
+ if ((fd = socket(address_family(a), a->type, 0)) < 0)
+ return -errno;
+
+ if (bind(fd, &a->sockaddr.sa, a->size) < 0) {
+ close_nointr(fd);
+ return -errno;
+ }
+
+ if (a->type == SOCK_STREAM)
+ if (listen(fd, backlog) < 0) {
+ close_nointr(fd);
+ return -errno;
+ }
+
+ if (address_family(a) == AF_INET6) {
+ int flag = a->bind_ipv6_only;
+
+ if (setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &flag, sizeof(flag)) < 0) {
+ close_nointr(fd);
+ return -errno;
+ }
+ }
+
+ return 0;
+}
~ianmdlvl / elogind.git / commitdiff