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-rw-r--r--src/shared/socket-util.c277
-rw-r--r--src/shared/socket-util.h14
2 files changed, 135 insertions, 156 deletions
diff --git a/src/shared/socket-util.c b/src/shared/socket-util.c
index 0097f011bb..75c47d1f76 100644
--- a/src/shared/socket-util.c
+++ b/src/shared/socket-util.c
@@ -41,9 +41,9 @@
#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);
@@ -59,26 +59,23 @@ int socket_address_parse(SocketAddress *a, const char *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);
+ if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0)
return errno > 0 ? -errno : -EINVAL;
- }
-
- free(n);
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)
@@ -114,43 +111,35 @@ int socket_address_parse(SocketAddress *a, const char *s) {
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;
@@ -181,9 +170,9 @@ int socket_address_parse(SocketAddress *a, const char *s) {
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);
}
}
@@ -229,7 +218,7 @@ int socket_address_verify(const SocketAddress *a) {
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)
@@ -259,7 +248,8 @@ int socket_address_verify(const SocketAddress *a) {
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)
@@ -287,101 +277,31 @@ int socket_address_verify(const SocketAddress *a) {
}
}
-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;
-
- ret = new(char, INET_ADDRSTRLEN+1+5+1);
- if (!ret)
- 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;
-
- ret = new(char, 1+INET6_ADDRSTRLEN+2+5+1);
- if (!ret)
- 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)) {
- ret = strdup("<unnamed>");
- if (!ret)
- 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 */
-
- ret = new(char, sizeof(a->sockaddr.un.sun_path)+1);
- if (!ret)
- 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 {
- ret = strdup(a->sockaddr.un.sun_path);
- if (!ret)
- return -ENOMEM;
- }
-
- *p = ret;
- return 0;
- }
-
- case AF_NETLINK: {
+ 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) {
@@ -413,10 +333,10 @@ bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) {
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;
@@ -552,8 +472,8 @@ 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 &&
@@ -568,37 +488,24 @@ bool socket_address_matches_fd(const SocketAddress *a, int fd) {
return false;
}
-int getpeername_pretty(int fd, char **ret) {
-
- union {
- struct sockaddr sa;
- struct sockaddr_un un;
- struct sockaddr_in in;
- struct sockaddr_in6 in6;
- struct sockaddr_storage storage;
- } sa;
-
- socklen_t salen;
+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(fd >= 0);
- assert(ret);
+ assert(sa);
+ assert(salen >= sizeof(sa->sa.sa_family));
- salen = sizeof(sa);
- if (getpeername(fd, &sa.sa, &salen) < 0)
- return -errno;
-
- switch (sa.sa.sa_family) {
+ switch (sa->sa.sa_family) {
case AF_INET: {
uint32_t a;
- a = ntohl(sa.in.sin_addr.s_addr);
+ 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)
+ ntohs(sa->in.sin_port)) < 0)
return -ENOMEM;
break;
@@ -609,48 +516,118 @@ int getpeername_pretty(int fd, char **ret) {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xFF, 0xFF
};
- if (memcmp(&sa.in6.sin6_addr, ipv4_prefix, sizeof(ipv4_prefix)) == 0) {
- const uint8_t *a = sa.in6.sin6_addr.s6_addr+12;
+ 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)
+ 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)
+ "[%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: {
- struct ucred ucred;
+ case AF_UNIX:
+ if (salen <= offsetof(struct sockaddr_un, sun_path)) {
+ p = strdup("<unnamed>");
+ if (!p)
+ return -ENOMEM;
- salen = sizeof(ucred);
- if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &salen) < 0)
- return -errno;
+ } else if (sa->un.sun_path[0] == 0) {
+ /* abstract */
- if (asprintf(&p, "PID %lu/UID %lu", (unsigned long) ucred.pid, (unsigned long) ucred.pid) < 0)
- return -ENOMEM;
+ /* 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;
+
+ 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 */
+
+ salen = sizeof(ucred);
+ if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &salen) < 0)
+ return -errno;
+
+ if (asprintf(ret, "PID %lu/UID %lu", (unsigned long) ucred.pid, (unsigned long) ucred.pid) < 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);
+}
+
static const char* const netlink_family_table[] = {
[NETLINK_ROUTE] = "route",
[NETLINK_FIREWALL] = "firewall",
diff --git a/src/shared/socket-util.h b/src/shared/socket-util.h
index 13566f9691..d42a2fee31 100644
--- a/src/shared/socket-util.h
+++ b/src/shared/socket-util.h
@@ -33,7 +33,7 @@
union sockaddr_union {
struct sockaddr sa;
- struct sockaddr_in in4;
+ struct sockaddr_in in;
struct sockaddr_in6 in6;
struct sockaddr_un un;
struct sockaddr_nl nl;
@@ -92,12 +92,14 @@ bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) _pure_
const char* socket_address_get_path(const SocketAddress *a);
+bool socket_ipv6_is_supported(void);
+
+int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, char **ret);
+int getpeername_pretty(int fd, char **ret);
+int getsockname_pretty(int fd, char **ret);
+
const char* socket_address_bind_ipv6_only_to_string(SocketAddressBindIPv6Only b) _const_;
SocketAddressBindIPv6Only socket_address_bind_ipv6_only_from_string(const char *s) _pure_;
int netlink_family_to_string_alloc(int b, char **s);
-int netlink_family_from_string(const char *s);
-
-bool socket_ipv6_is_supported(void);
-
-int getpeername_pretty(int fd, char **ret);
+int netlink_family_from_string(const char *s) _pure_;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-01 22:36:51 +0000