#include "path-util.h"
#include "socket-util.h"
#include "missing.h"
+#include "fileio.h"
int socket_address_parse(SocketAddress *a, const char *s) {
- int r;
char *e, *n;
unsigned u;
+ int r;
assert(a);
assert(s);
return -EAFNOSUPPORT;
}
- if (!(e = strchr(s+1, ']')))
+ e = strchr(s+1, ']');
+ if (!e)
return -EINVAL;
- if (!(n = strndup(s+1, e-s-1)))
- return -ENOMEM;
+ n = strndupa(s+1, e-s-1);
errno = 0;
- if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0) {
- free(n);
- return errno != 0 ? -errno : -EINVAL;
- }
-
- free(n);
+ if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0)
+ return errno > 0 ? -errno : -EINVAL;
e++;
if (*e != ':')
return -EINVAL;
e++;
- if ((r = safe_atou(e, &u)) < 0)
+ r = safe_atou(e, &u);
+ if (r < 0)
return r;
if (u <= 0 || u > 0xFFFF)
a->size = offsetof(struct sockaddr_un, sun_path) + 1 + l;
} else {
-
- if ((e = strchr(s, ':'))) {
-
- if ((r = safe_atou(e+1, &u)) < 0)
+ e = strchr(s, ':');
+ if (e) {
+ r = safe_atou(e+1, &u);
+ if (r < 0)
return r;
if (u <= 0 || u > 0xFFFF)
return -EINVAL;
- if (!(n = strndup(s, e-s)))
- return -ENOMEM;
+ n = strndupa(s, e-s);
/* IPv4 in w.x.y.z:p notation? */
- if ((r = inet_pton(AF_INET, n, &a->sockaddr.in4.sin_addr)) < 0) {
- free(n);
+ r = inet_pton(AF_INET, n, &a->sockaddr.in.sin_addr);
+ if (r < 0)
return -errno;
- }
if (r > 0) {
/* Gotcha, it's a traditional IPv4 address */
- free(n);
-
- a->sockaddr.in4.sin_family = AF_INET;
- a->sockaddr.in4.sin_port = htons((uint16_t) u);
+ a->sockaddr.in.sin_family = AF_INET;
+ a->sockaddr.in.sin_port = htons((uint16_t) u);
a->size = sizeof(struct sockaddr_in);
} else {
unsigned idx;
- if (strlen(n) > IF_NAMESIZE-1) {
- free(n);
+ if (strlen(n) > IF_NAMESIZE-1)
return -EINVAL;
- }
/* Uh, our last resort, an interface name */
idx = if_nametoindex(n);
- free(n);
-
if (idx == 0)
return -EINVAL;
a->sockaddr.in6.sin6_addr = in6addr_any;
a->size = sizeof(struct sockaddr_in6);
} else {
- a->sockaddr.in4.sin_family = AF_INET;
- a->sockaddr.in4.sin_port = htons((uint16_t) u);
- a->sockaddr.in4.sin_addr.s_addr = INADDR_ANY;
+ a->sockaddr.in.sin_family = AF_INET;
+ a->sockaddr.in.sin_port = htons((uint16_t) u);
+ a->sockaddr.in.sin_addr.s_addr = INADDR_ANY;
a->size = sizeof(struct sockaddr_in);
}
}
errno = 0;
if (sscanf(s, "%ms %u", &sfamily, &group) < 1)
- return errno ? -errno : -EINVAL;
+ return errno > 0 ? -errno : -EINVAL;
family = netlink_family_from_string(sfamily);
if (family < 0)
if (a->size != sizeof(struct sockaddr_in))
return -EINVAL;
- if (a->sockaddr.in4.sin_port == 0)
+ if (a->sockaddr.in.sin_port == 0)
return -EINVAL;
if (a->type != SOCK_STREAM && a->type != SOCK_DGRAM)
char *e;
/* path */
- if (!(e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path))))
+ e = memchr(a->sockaddr.un.sun_path, 0, sizeof(a->sockaddr.un.sun_path));
+ if (!e)
return -EINVAL;
if (a->size != offsetof(struct sockaddr_un, sun_path) + (e - a->sockaddr.un.sun_path) + 1)
}
}
-int socket_address_print(const SocketAddress *a, char **p) {
+int socket_address_print(const SocketAddress *a, char **ret) {
int r;
+
assert(a);
- assert(p);
+ assert(ret);
- if ((r = socket_address_verify(a)) < 0)
+ r = socket_address_verify(a);
+ if (r < 0)
return r;
- switch (socket_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 <= offsetof(struct sockaddr_un, sun_path)) {
-
- if (!(ret = strdup("<unnamed>")))
- 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;
- }
-
- case AF_NETLINK: {
- char _cleanup_free_ *sfamily = NULL;
+ if (socket_address_family(a) == AF_NETLINK) {
+ _cleanup_free_ char *sfamily = NULL;
r = netlink_family_to_string_alloc(a->protocol, &sfamily);
if (r < 0)
return r;
- r = asprintf(p, "%s %u", sfamily, a->sockaddr.nl.nl_groups);
+
+ r = asprintf(ret, "%s %u", sfamily, a->sockaddr.nl.nl_groups);
if (r < 0)
return -ENOMEM;
return 0;
}
- default:
- return -EINVAL;
- }
+ return sockaddr_pretty(&a->sockaddr.sa, a->size, false, ret);
}
bool socket_address_can_accept(const SocketAddress *a) {
switch (socket_address_family(a)) {
case AF_INET:
- if (a->sockaddr.in4.sin_addr.s_addr != b->sockaddr.in4.sin_addr.s_addr)
+ if (a->sockaddr.in.sin_addr.s_addr != b->sockaddr.in.sin_addr.s_addr)
return false;
- if (a->sockaddr.in4.sin_port != b->sockaddr.in4.sin_port)
+ if (a->sockaddr.in.sin_port != b->sockaddr.in.sin_port)
return false;
break;
return socket_address_equal(a, &b);
}
-bool socket_address_needs_mount(const SocketAddress *a, const char *prefix) {
+const char* socket_address_get_path(const SocketAddress *a) {
assert(a);
if (socket_address_family(a) != AF_UNIX)
- return false;
+ return NULL;
if (a->sockaddr.un.sun_path[0] == 0)
- return false;
+ return NULL;
- return path_startswith(a->sockaddr.un.sun_path, prefix);
+ return a->sockaddr.un.sun_path;
}
bool socket_ipv6_is_supported(void) {
- char *l = 0;
- bool enabled;
+ _cleanup_free_ char *l = NULL;
if (access("/sys/module/ipv6", F_OK) != 0)
return 0;
return 1;
/* If module was loaded with disable=1 no IPv6 available */
- enabled = l[0] == '0';
- free(l);
-
- return enabled;
+ return l[0] == '0';
}
bool socket_address_matches_fd(const SocketAddress *a, int fd) {
switch (sa.sa.sa_family) {
case AF_INET:
- return sa.in4.sin_port == a->sockaddr.in4.sin_port &&
- sa.in4.sin_addr.s_addr == a->sockaddr.in4.sin_addr.s_addr;
+ return sa.in.sin_port == a->sockaddr.in.sin_port &&
+ sa.in.sin_addr.s_addr == a->sockaddr.in.sin_addr.s_addr;
case AF_INET6:
return sa.in6.sin6_port == a->sockaddr.in6.sin6_port &&
return false;
}
+int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, char **ret) {
+ union sockaddr_union *sa = (union sockaddr_union*) _sa;
+ char *p;
+
+ assert(sa);
+ assert(salen >= sizeof(sa->sa.sa_family));
+
+ switch (sa->sa.sa_family) {
+
+ case AF_INET: {
+ uint32_t a;
+
+ a = ntohl(sa->in.sin_addr.s_addr);
+
+ if (asprintf(&p,
+ "%u.%u.%u.%u:%u",
+ a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
+ ntohs(sa->in.sin_port)) < 0)
+ return -ENOMEM;
+
+ break;
+ }
+
+ case AF_INET6: {
+ static const unsigned char ipv4_prefix[] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
+ };
+
+ if (translate_ipv6 && memcmp(&sa->in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
+ const uint8_t *a = sa->in6.sin6_addr.s6_addr+12;
+
+ if (asprintf(&p,
+ "%u.%u.%u.%u:%u",
+ a[0], a[1], a[2], a[3],
+ ntohs(sa->in6.sin6_port)) < 0)
+ return -ENOMEM;
+ } else {
+ char a[INET6_ADDRSTRLEN];
+
+ if (asprintf(&p,
+ "[%s]:%u",
+ inet_ntop(AF_INET6, &sa->in6.sin6_addr, a, sizeof(a)),
+ ntohs(sa->in6.sin6_port)) < 0)
+ return -ENOMEM;
+ }
+
+ break;
+ }
+
+ case AF_UNIX:
+ if (salen <= offsetof(struct sockaddr_un, sun_path)) {
+ p = strdup("<unnamed>");
+ if (!p)
+ return -ENOMEM;
+
+ } else if (sa->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 */
+
+ p = new(char, sizeof(sa->un.sun_path)+1);
+ if (!p)
+ return -ENOMEM;
+
+ p[0] = '@';
+ memcpy(p+1, sa->un.sun_path+1, sizeof(sa->un.sun_path)-1);
+ p[sizeof(sa->un.sun_path)] = 0;
+
+ } else {
+ p = strndup(sa->un.sun_path, sizeof(sa->un.sun_path));
+ if (!ret)
+ return -ENOMEM;
+ }
+
+ break;
+
+ default:
+ return -ENOTSUP;
+ }
+
+
+ *ret = p;
+ return 0;
+}
+
+int getpeername_pretty(int fd, char **ret) {
+ union sockaddr_union sa;
+ socklen_t salen;
+ int r;
+
+ assert(fd >= 0);
+ assert(ret);
+
+ salen = sizeof(sa);
+ if (getpeername(fd, &sa.sa, &salen) < 0)
+ return -errno;
+
+ if (sa.sa.sa_family == AF_UNIX) {
+ struct ucred ucred = {};
+
+ /* UNIX connection sockets are anonymous, so let's use
+ * PID/UID as pretty credentials instead */
+
+ r = getpeercred(fd, &ucred);
+ if (r < 0)
+ return r;
+
+ if (asprintf(ret, "PID "PID_FMT"/UID "UID_FMT, ucred.pid, ucred.uid) < 0)
+ return -ENOMEM;
+
+ return 0;
+ }
+
+ /* For remote sockets we translate IPv6 addresses back to IPv4
+ * if applicable, since that's nicer. */
+
+ return sockaddr_pretty(&sa.sa, salen, true, ret);
+}
+
+int getsockname_pretty(int fd, char **ret) {
+ union sockaddr_union sa;
+ socklen_t salen;
+
+ assert(fd >= 0);
+ assert(ret);
+
+ salen = sizeof(sa);
+ if (getsockname(fd, &sa.sa, &salen) < 0)
+ return -errno;
+
+ /* For local sockets we do not translate IPv6 addresses back
+ * to IPv6 if applicable, since this is usually used for
+ * listening sockets where the difference between IPv4 and
+ * IPv6 matters. */
+
+ return sockaddr_pretty(&sa.sa, salen, false, ret);
+}
+
+int socket_address_unlink(SocketAddress *a) {
+ assert(a);
+
+ if (socket_address_family(a) != AF_UNIX)
+ return 0;
+
+ if (a->sockaddr.un.sun_path[0] == 0)
+ return 0;
+
+ if (unlink(a->sockaddr.un.sun_path) < 0)
+ return -errno;
+
+ return 1;
+}
+
+int in_addr_null(unsigned family, union in_addr_union *u) {
+ assert(u);
+
+ if (family == AF_INET)
+ return u->in.s_addr == 0;
+
+ if (family == AF_INET6)
+ return
+ u->in6.s6_addr32[0] == 0 &&
+ u->in6.s6_addr32[1] == 0 &&
+ u->in6.s6_addr32[2] == 0 &&
+ u->in6.s6_addr32[3] == 0;
+
+ return -EAFNOSUPPORT;
+}
+
+
+int in_addr_equal(unsigned family, union in_addr_union *a, union in_addr_union *b) {
+ assert(a);
+ assert(b);
+
+ if (family == AF_INET)
+ return a->in.s_addr == b->in.s_addr;
+
+ if (family == AF_INET6)
+ return
+ a->in6.s6_addr32[0] == b->in6.s6_addr32[0] &&
+ a->in6.s6_addr32[1] == b->in6.s6_addr32[1] &&
+ a->in6.s6_addr32[2] == b->in6.s6_addr32[2] &&
+ a->in6.s6_addr32[3] == b->in6.s6_addr32[3];
+
+ return -EAFNOSUPPORT;
+}
+
+int in_addr_prefix_intersect(
+ unsigned family,
+ const union in_addr_union *a,
+ unsigned aprefixlen,
+ const union in_addr_union *b,
+ unsigned bprefixlen) {
+
+ unsigned m;
+
+ assert(a);
+ assert(b);
+
+ /* Checks whether there are any addresses that are in both
+ * networks */
+
+ m = MIN(aprefixlen, bprefixlen);
+
+ if (family == AF_INET) {
+ uint32_t x, nm;
+
+ x = be32toh(a->in.s_addr ^ b->in.s_addr);
+ nm = (m == 0) ? 0 : 0xFFFFFFFFUL << (32 - m);
+
+ return (x & nm) == 0;
+ }
+
+ if (family == AF_INET6) {
+ unsigned i;
+
+ if (m > 128)
+ m = 128;
+
+ for (i = 0; i < 16; i++) {
+ uint8_t x, nm;
+
+ x = a->in6.s6_addr[i] ^ b->in6.s6_addr[i];
+
+ if (m < 8)
+ nm = 0xFF << (8 - m);
+ else
+ nm = 0xFF;
+
+ if ((x & nm) != 0)
+ return 0;
+
+ if (m > 8)
+ m -= 8;
+ else
+ m = 0;
+ }
+
+ return 1;
+ }
+
+ return -EAFNOSUPPORT;
+}
+
+int in_addr_prefix_next(unsigned family, union in_addr_union *u, unsigned prefixlen) {
+ assert(u);
+
+ /* Increases the network part of an address by one. Returns
+ * positive it that succeeds, or 0 if this overflows. */
+
+ if (prefixlen <= 0)
+ return 0;
+
+ if (family == AF_INET) {
+ uint32_t c, n;
+
+ if (prefixlen > 32)
+ prefixlen = 32;
+
+ c = be32toh(u->in.s_addr);
+ n = c + (1UL << (32 - prefixlen));
+ if (n < c)
+ return 0;
+ n &= 0xFFFFFFFFUL << (32 - prefixlen);
+
+ u->in.s_addr = htobe32(n);
+ return 1;
+ }
+
+ if (family == AF_INET6) {
+ struct in6_addr add = {}, result;
+ uint8_t overflow = 0;
+ unsigned i;
+
+ if (prefixlen > 128)
+ prefixlen = 128;
+
+ /* First calculate what we have to add */
+ add.s6_addr[(prefixlen-1) / 8] = 1 << (7 - (prefixlen-1) % 8);
+
+ for (i = 16; i > 0; i--) {
+ unsigned j = i - 1;
+
+ result.s6_addr[j] = u->in6.s6_addr[j] + add.s6_addr[j] + overflow;
+ overflow = (result.s6_addr[j] < u->in6.s6_addr[j]);
+ }
+
+ if (overflow)
+ return 0;
+
+ u->in6 = result;
+ return 1;
+ }
+
+ return -EAFNOSUPPORT;
+}
+
+int in_addr_to_string(unsigned family, const union in_addr_union *u, char **ret) {
+ char *x;
+ size_t l;
+
+ assert(u);
+ assert(ret);
+
+ if (family == AF_INET)
+ l = INET_ADDRSTRLEN;
+ else if (family == AF_INET6)
+ l = INET6_ADDRSTRLEN;
+ else
+ return -EAFNOSUPPORT;
+
+ x = new(char, l);
+ if (!x)
+ return -ENOMEM;
+
+ errno = 0;
+ if (!inet_ntop(family, u, x, l)) {
+ free(x);
+ return errno ? -errno : -EINVAL;
+ }
+
+ *ret = x;
+ return 0;
+}
+
+int in_addr_from_string(unsigned family, const char *s, union in_addr_union *ret) {
+
+ assert(s);
+ assert(ret);
+
+ if (!IN_SET(family, AF_INET, AF_INET6))
+ return -EAFNOSUPPORT;
+
+ errno = 0;
+ if (inet_pton(family, s, ret) <= 0)
+ return errno ? -errno : -EINVAL;
+
+ return 0;
+}
+
static const char* const netlink_family_table[] = {
[NETLINK_ROUTE] = "route",
[NETLINK_FIREWALL] = "firewall",
~ianmdlvl / elogind.git / blobdiff