exportfs: exportfs.c no longer needs #include "xmalloc.h"

[nfs-utils.git] / utils / exportfs / exportfs.c

diff --git a/utils/exportfs/exportfs.c b/utils/exportfs/exportfs.c
index 0070b544d654400f9dbafa1127423e55609c5ea0..93bad32241fae7d5d0c4f7276e75f3290da5ffdf 100644 (file)
--- a/utils/exportfs/exportfs.c
+++ b/utils/exportfs/exportfs.c
@@ -12,20 +12,23 @@
 #include <config.h>
 #endif
 
+#include <sys/types.h>
+#include <sys/stat.h>
 #include <sys/vfs.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 #include <getopt.h>
+#include <fcntl.h>
 #include <netdb.h>
 #include <errno.h>
-#include "xmalloc.h"
+
 #include "misc.h"
 #include "nfslib.h"
 #include "exportfs.h"
-#include "xmalloc.h"
 #include "xlog.h"
 
 static void    export_all(int verbose);
@@ -36,6 +39,7 @@ static void   dump(int verbose);
 static void    error(nfs_export *exp, int err);
 static void    usage(void);
 static void    validate_export(nfs_export *exp);
+static int     matchhostname(const char *hostname1, const char *hostname2);
 
 int
 main(int argc, char **argv)
@@ -421,6 +425,82 @@ validate_export(nfs_export *exp)
        }
 }
 
+static _Bool
+is_hostname(const char *sp)
+{
+       if (*sp == '\0' || *sp == '@')
+               return false;
+
+       for (; *sp != '\0'; sp++) {
+               if (*sp == '*' || *sp == '?' || *sp == '[' || *sp == '/')
+                       return false;
+               if (*sp == '\\' && sp[1] != '\0')
+                       sp++;
+       }
+
+       return true;
+}
+
+static _Bool
+compare_sockaddrs4(const struct sockaddr *sa1, const struct sockaddr *sa2)
+{
+       const struct sockaddr_in *sin1 = (const struct sockaddr_in *)sa1;
+       const struct sockaddr_in *sin2 = (const struct sockaddr_in *)sa2;
+       return sin1->sin_addr.s_addr == sin2->sin_addr.s_addr;
+}
+
+static _Bool
+compare_sockaddrs(const struct sockaddr *sa1, const struct sockaddr *sa2)
+{
+       if (sa1->sa_family == sa2->sa_family)
+               switch (sa1->sa_family) {
+               case AF_INET:
+                       return compare_sockaddrs4(sa1, sa2);
+               }
+
+       return false;
+}
+
+static int
+matchhostname(const char *hostname1, const char *hostname2)
+{
+       struct addrinfo *results1 = NULL, *results2 = NULL;
+       struct addrinfo *ai1, *ai2;
+       int result = 0;
+
+       if (strcasecmp(hostname1, hostname2) == 0)
+               return 1;
+
+       /*
+        * Don't pass export wildcards or netgroup names to DNS
+        */
+       if (!is_hostname(hostname1) || !is_hostname(hostname2))
+               return 0;
+
+       results1 = host_addrinfo(hostname1);
+       if (results1 == NULL)
+               goto out;
+       results2 = host_addrinfo(hostname2);
+       if (results2 == NULL)
+               goto out;
+
+       if (strcasecmp(results1->ai_canonname, results2->ai_canonname) == 0) {
+               result = 1;
+               goto out;
+       }
+
+       for (ai1 = results1; ai1 != NULL; ai1 = ai1->ai_next)
+               for (ai2 = results2; ai2 != NULL; ai2 = ai2->ai_next)
+                       if (compare_sockaddrs(ai1->ai_addr, ai2->ai_addr)) {
+                               result = 1;
+                               break;
+                       }
+
+out:
+       freeaddrinfo(results1);
+       freeaddrinfo(results2);
+       return result;
+}
 
 static char
 dumpopt(char c, char *fmt, ...)