libsystemd-network: use _NEG_ macros to reduce indentation

No functional change intended.

6 files changed, 34 insertions, 52 deletions

diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index aaca8b792e..272201abfd 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -1848,10 +1848,9 @@ static int client_receive_message_udp(
         assert(s);
 
         buflen = next_datagram_size_fd(fd);
+        if (ERRNO_IS_NEG_TRANSIENT(buflen) || ERRNO_IS_NEG_DISCONNECT(buflen))
+                return 0;
         if (buflen < 0) {
-                if (ERRNO_IS_TRANSIENT(buflen) || ERRNO_IS_DISCONNECT(buflen))
-                        return 0;
-
                 log_dhcp_client_errno(client, buflen, "Failed to determine datagram size to read, ignoring: %m");
                 return 0;
         }
@@ -1941,10 +1940,9 @@ static int client_receive_message_raw(
         assert(s);
 
         buflen = next_datagram_size_fd(fd);
+        if (ERRNO_IS_NEG_TRANSIENT(buflen) || ERRNO_IS_NEG_DISCONNECT(buflen))
+                return 0;
         if (buflen < 0) {
-                if (ERRNO_IS_TRANSIENT(buflen) || ERRNO_IS_DISCONNECT(buflen))
-                        return 0;
-
                 log_dhcp_client_errno(client, buflen, "Failed to determine datagram size to read, ignoring: %m");
                 return 0;
         }
@@ -1956,10 +1954,9 @@ static int client_receive_message_raw(
         iov = IOVEC_MAKE(packet, buflen);
 
         len = recvmsg_safe(fd, &msg, 0);
+        if (ERRNO_IS_NEG_TRANSIENT(len) || ERRNO_IS_NEG_DISCONNECT(len))
+                return 0;
         if (len < 0) {
-                if (ERRNO_IS_TRANSIENT(len) || ERRNO_IS_DISCONNECT(len))
-                        return 0;
-
                 log_dhcp_client_errno(client, len, "Could not receive message from raw socket, ignoring: %m");
                 return 0;
         }
diff --git a/src/libsystemd-network/sd-dhcp-server.c b/src/libsystemd-network/sd-dhcp-server.c
index 0aa500d7d2..a9bb7657d1 100644
--- a/src/libsystemd-network/sd-dhcp-server.c
+++ b/src/libsystemd-network/sd-dhcp-server.c
@@ -1316,10 +1316,9 @@ static int server_receive_message(sd_event_source *s, int fd,
         int r;
 
         datagram_size = next_datagram_size_fd(fd);
+        if (ERRNO_IS_NEG_TRANSIENT(datagram_size) || ERRNO_IS_NEG_DISCONNECT(datagram_size))
+                return 0;
         if (datagram_size < 0) {
-                if (ERRNO_IS_TRANSIENT(datagram_size) || ERRNO_IS_DISCONNECT(datagram_size))
-                        return 0;
-
                 log_dhcp_server_errno(server, datagram_size, "Failed to determine datagram size to read, ignoring: %m");
                 return 0;
         }
@@ -1336,10 +1335,9 @@ static int server_receive_message(sd_event_source *s, int fd,
         iov = IOVEC_MAKE(message, datagram_size);
 
         len = recvmsg_safe(fd, &msg, 0);
+        if (ERRNO_IS_NEG_TRANSIENT(len) || ERRNO_IS_NEG_DISCONNECT(len))
+                return 0;
         if (len < 0) {
-                if (ERRNO_IS_TRANSIENT(len) || ERRNO_IS_DISCONNECT(len))
-                        return 0;
-
                 log_dhcp_server_errno(server, len, "Could not receive message, ignoring: %m");
                 return 0;
         }
diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
index 9a4f3ab1bf..2f4053caad 100644
--- a/src/libsystemd-network/sd-dhcp6-client.c
+++ b/src/libsystemd-network/sd-dhcp6-client.c
@@ -1283,10 +1283,9 @@ static int client_receive_message(
         ssize_t buflen, len;
 
         buflen = next_datagram_size_fd(fd);
+        if (ERRNO_IS_NEG_TRANSIENT(buflen) || ERRNO_IS_NEG_DISCONNECT(buflen))
+                return 0;
         if (buflen < 0) {
-                if (ERRNO_IS_TRANSIENT(buflen) || ERRNO_IS_DISCONNECT(buflen))
-                        return 0;
-
                 log_dhcp6_client_errno(client, buflen, "Failed to determine datagram size to read, ignoring: %m");
                 return 0;
         }
@@ -1298,10 +1297,9 @@ static int client_receive_message(
         iov = IOVEC_MAKE(message, buflen);
 
         len = recvmsg_safe(fd, &msg, MSG_DONTWAIT);
+        if (ERRNO_IS_NEG_TRANSIENT(len) || ERRNO_IS_NEG_DISCONNECT(len))
+                return 0;
         if (len < 0) {
-                if (ERRNO_IS_TRANSIENT(len) || ERRNO_IS_DISCONNECT(len))
-                        return 0;
-
                 log_dhcp6_client_errno(client, len, "Could not receive message from UDP socket, ignoring: %m");
                 return 0;
         }
diff --git a/src/libsystemd-network/sd-lldp-rx.c b/src/libsystemd-network/sd-lldp-rx.c
index 03e8986049..8dafa41812 100644
--- a/src/libsystemd-network/sd-lldp-rx.c
+++ b/src/libsystemd-network/sd-lldp-rx.c
@@ -198,10 +198,9 @@ static int lldp_rx_receive_datagram(sd_event_source *s, int fd, uint32_t revents
         assert(fd >= 0);
 
         space = next_datagram_size_fd(fd);
+        if (ERRNO_IS_NEG_TRANSIENT(space) || ERRNO_IS_NEG_DISCONNECT(space))
+                return 0;
         if (space < 0) {
-                if (ERRNO_IS_TRANSIENT(space) || ERRNO_IS_DISCONNECT(space))
-                        return 0;
-
                 log_lldp_rx_errno(lldp_rx, space, "Failed to determine datagram size to read, ignoring: %m");
                 return 0;
         }
diff --git a/src/libsystemd-network/sd-ndisc.c b/src/libsystemd-network/sd-ndisc.c
index 2e446fece3..ca5365b95f 100644
--- a/src/libsystemd-network/sd-ndisc.c
+++ b/src/libsystemd-network/sd-ndisc.c
@@ -208,10 +208,9 @@ static int ndisc_recv(sd_event_source *s, int fd, uint32_t revents, void *userda
         assert(nd->event);
 
         buflen = next_datagram_size_fd(fd);
+        if (ERRNO_IS_NEG_TRANSIENT(buflen) || ERRNO_IS_NEG_DISCONNECT(buflen))
+                return 0;
         if (buflen < 0) {
-                if (ERRNO_IS_TRANSIENT(buflen) || ERRNO_IS_DISCONNECT(buflen))
-                        return 0;
-
                 log_ndisc_errno(nd, buflen, "Failed to determine datagram size to read, ignoring: %m");
                 return 0;
         }
@@ -221,32 +220,28 @@ static int ndisc_recv(sd_event_source *s, int fd, uint32_t revents, void *userda
                 return -ENOMEM;
 
         r = icmp6_receive(fd, NDISC_ROUTER_RAW(rt), rt->raw_size, &rt->address, &rt->timestamp);
-        if (r < 0) {
-                if (ERRNO_IS_TRANSIENT(r) || ERRNO_IS_DISCONNECT(r))
-                        return 0;
-
+        if (ERRNO_IS_NEG_TRANSIENT(r) || ERRNO_IS_NEG_DISCONNECT(r))
+                return 0;
+        if (r < 0)
                 switch (r) {
                 case -EADDRNOTAVAIL:
                         log_ndisc(nd, "Received RA from non-link-local address %s. Ignoring.",
                                   IN6_ADDR_TO_STRING(&rt->address));
-                        break;
+                        return 0;
 
                 case -EMULTIHOP:
                         log_ndisc(nd, "Received RA with invalid hop limit. Ignoring.");
-                        break;
+                        return 0;
 
                 case -EPFNOSUPPORT:
                         log_ndisc(nd, "Received invalid source address from ICMPv6 socket. Ignoring.");
-                        break;
+                        return 0;
 
                 default:
                         log_ndisc_errno(nd, r, "Unexpected error while reading from ICMPv6, ignoring: %m");
-                        break;
+                        return 0;
                 }
 
-                return 0;
-        }
-
         (void) event_source_disable(nd->timeout_event_source);
         (void) ndisc_handle_datagram(nd, rt);
         return 0;
diff --git a/src/libsystemd-network/sd-radv.c b/src/libsystemd-network/sd-radv.c
index 20458b9f97..890c146295 100644
--- a/src/libsystemd-network/sd-radv.c
+++ b/src/libsystemd-network/sd-radv.c
@@ -252,10 +252,9 @@ static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdat
         assert(ra->event);
 
         ssize_t buflen = next_datagram_size_fd(fd);
+        if (ERRNO_IS_NEG_TRANSIENT(buflen) || ERRNO_IS_NEG_DISCONNECT(buflen))
+                return 0;
         if (buflen < 0) {
-                if (ERRNO_IS_TRANSIENT(buflen) || ERRNO_IS_DISCONNECT(buflen))
-                        return 0;
-
                 log_radv_errno(ra, buflen, "Failed to determine datagram size to read, ignoring: %m");
                 return 0;
         }
@@ -265,32 +264,28 @@ static int radv_recv(sd_event_source *s, int fd, uint32_t revents, void *userdat
                 return -ENOMEM;
 
         r = icmp6_receive(fd, buf, buflen, &src, &timestamp);
-        if (r < 0) {
-                if (ERRNO_IS_TRANSIENT(r) || ERRNO_IS_DISCONNECT(r))
-                        return 0;
-
+        if (ERRNO_IS_NEG_TRANSIENT(r) || ERRNO_IS_NEG_DISCONNECT(r))
+                return 0;
+        if (r < 0)
                 switch (r) {
                 case -EADDRNOTAVAIL:
                         log_radv(ra, "Received RS from non-link-local address %s. Ignoring",
                                  IN6_ADDR_TO_STRING(&src));
-                        break;
+                        return 0;
 
                 case -EMULTIHOP:
                         log_radv(ra, "Received RS with invalid hop limit. Ignoring.");
-                        break;
+                        return 0;
 
                 case -EPFNOSUPPORT:
                         log_radv(ra, "Received invalid source address from ICMPv6 socket. Ignoring.");
-                        break;
+                        return 0;
 
                 default:
                         log_radv_errno(ra, r, "Unexpected error receiving from ICMPv6 socket, ignoring: %m");
-                        break;
+                        return 0;
                 }
 
-                return 0;
-        }
-
         if ((size_t) buflen < sizeof(struct nd_router_solicit)) {
                 log_radv(ra, "Too short packet received, ignoring");
                 return 0;