mkdir: modernize header ifdefs

[elogind.git] / src / shared / socket-util.c

diff --git a/src/shared/socket-util.c b/src/shared/socket-util.c
index 56ec99f442388e2779ba7401a5005368e6c61cd6..0097f011bb1332741b20490c6ef6be102f2df9f0 100644 (file)
--- a/src/shared/socket-util.c
+++ b/src/shared/socket-util.c
@@ -38,6 +38,7 @@
 #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;
@@ -67,7 +68,7 @@ int socket_address_parse(SocketAddress *a, const char *s) {
                 errno = 0;
                 if (inet_pton(AF_INET6, n, &a->sockaddr.in6.sin6_addr) <= 0) {
                         free(n);
-                        return errno != 0 ? -errno : -EINVAL;
+                        return errno > 0 ? -errno : -EINVAL;
                 }
 
                 free(n);
@@ -203,7 +204,7 @@ int socket_address_parse_netlink(SocketAddress *a, const char *s) {
 
         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)
@@ -299,7 +300,8 @@ int socket_address_print(const SocketAddress *a, char **p) {
         case AF_INET: {
                 char *ret;
 
-                if (!(ret = new(char, INET_ADDRSTRLEN+1+5+1)))
+                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)) {
@@ -315,7 +317,8 @@ int socket_address_print(const SocketAddress *a, char **p) {
         case AF_INET6: {
                 char *ret;
 
-                if (!(ret = new(char, 1+INET6_ADDRSTRLEN+2+5+1)))
+                ret = new(char, 1+INET6_ADDRSTRLEN+2+5+1);
+                if (!ret)
                         return -ENOMEM;
 
                 ret[0] = '[';
@@ -333,8 +336,8 @@ int socket_address_print(const SocketAddress *a, char **p) {
                 char *ret;
 
                 if (a->size <= offsetof(struct sockaddr_un, sun_path)) {
-
-                        if (!(ret = strdup("<unnamed>")))
+                        ret = strdup("<unnamed>");
+                        if (!ret)
                                 return -ENOMEM;
 
                 } else if (a->sockaddr.un.sun_path[0] == 0) {
@@ -345,7 +348,8 @@ int socket_address_print(const SocketAddress *a, char **p) {
                          * more than one NUL byte. That is
                          * actually an invalid assumption */
 
-                        if (!(ret = new(char, sizeof(a->sockaddr.un.sun_path)+1)))
+                        ret = new(char, sizeof(a->sockaddr.un.sun_path)+1);
+                        if (!ret)
                                 return -ENOMEM;
 
                         ret[0] = '@';
@@ -353,8 +357,8 @@ int socket_address_print(const SocketAddress *a, char **p) {
                         ret[sizeof(a->sockaddr.un.sun_path)] = 0;
 
                 } else {
-
-                        if (!(ret = strdup(a->sockaddr.un.sun_path)))
+                        ret = strdup(a->sockaddr.un.sun_path);
+                        if (!ret)
                                 return -ENOMEM;
                 }
 
@@ -363,7 +367,7 @@ int socket_address_print(const SocketAddress *a, char **p) {
         }
 
         case AF_NETLINK: {
-                char _cleanup_free_ *sfamily = NULL;
+                _cleanup_free_ char *sfamily = NULL;
 
                 r = netlink_family_to_string_alloc(a->protocol, &sfamily);
                 if (r < 0)
@@ -432,7 +436,7 @@ bool socket_address_equal(const SocketAddress *a, const SocketAddress *b) {
                         return false;
 
                 if (a->sockaddr.un.sun_path[0]) {
-                        if (strncmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, sizeof(a->sockaddr.un.sun_path)) != 0)
+                        if (!strneq(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, sizeof(a->sockaddr.un.sun_path)))
                                 return false;
                 } else {
                         if (memcmp(a->sockaddr.un.sun_path, b->sockaddr.un.sun_path, a->size) != 0)
@@ -485,16 +489,16 @@ bool socket_address_is_netlink(const SocketAddress *a, const char *s) {
         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) {
@@ -564,6 +568,89 @@ 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;
+        char *p;
+
+        assert(fd >= 0);
+        assert(ret);
+
+        salen = sizeof(sa);
+        if (getpeername(fd, &sa.sa, &salen) < 0)
+                return -errno;
+
+        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 (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: {
+                struct ucred ucred;
+
+                salen = sizeof(ucred);
+                if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &salen) < 0)
+                        return -errno;
+
+                if (asprintf(&p, "PID %lu/UID %lu", (unsigned long) ucred.pid, (unsigned long) ucred.pid) < 0)
+                        return -ENOMEM;
+
+                break;
+        }
+
+        default:
+                return -ENOTSUP;
+        }
+
+        *ret = p;
+        return 0;
+}
+
 static const char* const netlink_family_table[] = {
         [NETLINK_ROUTE] = "route",
         [NETLINK_FIREWALL] = "firewall",