Retrieve FD_SETSIZE in a sane environment.

[thirdparty/lldpd.git] / src / lldpd.c

diff --git a/src/lldpd.c b/src/lldpd.c
index 6e7b974ef83f81fb8cea595c8396c5d93efc71d8..98f2770800b6d90682e5aa31e26b2f5ff6ded379 100644 (file)
--- a/src/lldpd.c
+++ b/src/lldpd.c
@@ -33,6 +33,10 @@
 #include <arpa/inet.h>
 #include <net/if_arp.h>
 
+#if LLDPD_FD_SETSIZE != FD_SETSIZE
+# warning "FD_SETSIZE is set to an inconsistent value."
+#endif
+
 #ifdef USE_SNMP
 #include <net-snmp/net-snmp-config.h>
 #include <net-snmp/net-snmp-includes.h>
@@ -240,7 +244,7 @@ lldpd_hardware_cleanup(struct lldpd *cfg, struct lldpd_hardware *hardware)
                hardware->h_ops->cleanup(cfg, hardware);
        else {
                free(hardware->h_data);
-               for (i=0; i < FD_SETSIZE; i++)
+               for (i=0; i < LLDPD_FD_SETSIZE; i++)
                        if (FD_ISSET(i, &hardware->h_recvfds))
                                close(i);
                if (hardware->h_sendfd) close(hardware->h_sendfd);
@@ -482,7 +486,7 @@ lldpd_recv_all(struct lldpd *cfg)
                                continue;
                        /* This is quite expensive but we don't rely on internal
                         * structure of fd_set. */
-                       for (n = 0; n < FD_SETSIZE; n++)
+                       for (n = 0; n < LLDPD_FD_SETSIZE; n++)
                                if (FD_ISSET(n, &hardware->h_recvfds)) {
                                        FD_SET(n, &rfds);
                                        if (nfds < n)
@@ -520,10 +524,10 @@ lldpd_recv_all(struct lldpd *cfg)
                }
 #endif /* USE_SNMP */
                TAILQ_FOREACH(hardware, &cfg->g_hardware, h_entries) {
-                       for (n = 0; n < FD_SETSIZE; n++)
+                       for (n = 0; n < LLDPD_FD_SETSIZE; n++)
                                if ((FD_ISSET(n, &hardware->h_recvfds)) &&
                                    (FD_ISSET(n, &rfds))) break;
-                       if (n == FD_SETSIZE) continue;
+                       if (n == LLDPD_FD_SETSIZE) continue;
                        if ((buffer = (char *)malloc(
                                        hardware->h_mtu)) == NULL) {
                                LLOG_WARN("failed to alloc reception buffer");