Apache 1.3.9 baseline for the Apache 2.0 repository.

Obtained from: Apache 1.3.9 (minus unused files), tag APACHE_1_3_9
Submitted by: Apache Group


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@83750 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 345 insertions, 0 deletions

diff --git a/support/logresolve.c b/support/logresolve.c
new file mode 100644
index 0000000000..bcdc6e51b5
--- /dev/null
+++ b/support/logresolve.c
@@ -0,0 +1,345 @@
+/*
+ * logresolve 1.1
+ *
+ * Tom Rathborne - tomr@uunet.ca - http://www.uunet.ca/~tomr/
+ * UUNET Canada, April 16, 1995
+ *
+ * Rewritten by David Robinson. (drtr@ast.cam.ac.uk)
+ *
+ * Usage: logresolve [-s filename] [-c] < access_log > new_log
+ *
+ * Arguments:
+ *    -s filename     name of a file to record statistics
+ *    -c              check the DNS for a matching A record for the host.
+ *
+ * Notes:
+ *
+ * To generate meaningful statistics from an HTTPD log file, it's good
+ * to have the domain name of each machine that accessed your site, but
+ * doing this on the fly can slow HTTPD down.
+ *
+ * Compiling NCSA HTTPD with the -DMINIMAL_DNS flag turns IP#->hostname
+ * resolution off. Before running your stats program, just run your log
+ * file through this program (logresolve) and all of your IP numbers will
+ * be resolved into hostnames (where possible).
+ *
+ * logresolve takes an HTTPD access log (in the COMMON log file format,
+ * or any other format that has the IP number/domain name as the first
+ * field for that matter), and outputs the same file with all of the
+ * domain names looked up. Where no domain name can be found, the IP
+ * number is left in.
+ *
+ * To minimize impact on your nameserver, logresolve has its very own
+ * internal hash-table cache. This means that each IP number will only
+ * be looked up the first time it is found in the log file.
+ *
+ * The -c option causes logresolve to apply the same check as httpd
+ * compiled with -DMAXIMUM_DNS; after finding the hostname from the IP
+ * address, it looks up the IP addresses for the hostname and checks
+ * that one of these matches the original address.
+ */
+
+#include "ap_config.h"
+#include <sys/types.h>
+
+#include <ctype.h>
+
+#ifndef MPE
+#include <arpa/inet.h>
+#endif
+
+static void cgethost(struct in_addr ipnum, char *string, int check);
+static int getline(char *s, int n);
+static void stats(FILE *output);
+
+
+/* maximum line length */
+#define MAXLINE 1024
+
+/* maximum length of a domain name */
+#ifndef MAXDNAME
+#define MAXDNAME 256
+#endif
+
+/* number of buckets in cache hash table */
+#define BUCKETS 256
+
+#if defined(NEED_STRDUP)
+char *strdup (const char *str)
+{
+    char *dup;
+
+    if (!(dup = (char *) malloc(strlen(str) + 1)))
+	return NULL;
+    dup = strcpy(dup, str);
+
+    return dup;
+}
+#endif
+
+/*
+ * struct nsrec - record of nameservice for cache linked list
+ * 
+ * ipnum - IP number hostname - hostname noname - nonzero if IP number has no
+ * hostname, i.e. hostname=IP number
+ */
+
+struct nsrec {
+    struct in_addr ipnum;
+    char *hostname;
+    int noname;
+    struct nsrec *next;
+}    *nscache[BUCKETS];
+
+/*
+ * statistics - obvious
+ */
+
+#ifndef h_errno
+extern int h_errno; /* some machines don't have this in their headers */
+#endif
+
+/* largeste value for h_errno */
+#define MAX_ERR (NO_ADDRESS)
+#define UNKNOWN_ERR (MAX_ERR+1)
+#define NO_REVERSE  (MAX_ERR+2)
+
+static int cachehits = 0;
+static int cachesize = 0;
+static int entries = 0;
+static int resolves = 0;
+static int withname = 0;
+static int errors[MAX_ERR + 3];
+
+/*
+ * cgethost - gets hostname by IP address, caching, and adding unresolvable
+ * IP numbers with their IP number as hostname, setting noname flag
+ */
+
+static void cgethost (struct in_addr ipnum, char *string, int check)
+{
+    struct nsrec **current, *new;
+    struct hostent *hostdata;
+    char *name;
+
+    current = &nscache[((ipnum.s_addr + (ipnum.s_addr >> 8) +
+			 (ipnum.s_addr >> 16) + (ipnum.s_addr >> 24)) % BUCKETS)];
+
+    while (*current != NULL && ipnum.s_addr != (*current)->ipnum.s_addr)
+	current = &(*current)->next;
+
+    if (*current == NULL) {
+	cachesize++;
+	new = (struct nsrec *) malloc(sizeof(struct nsrec));
+	if (new == NULL) {
+	    perror("malloc");
+	    fprintf(stderr, "Insufficient memory\n");
+	    exit(1);
+	}
+	*current = new;
+	new->next = NULL;
+
+	new->ipnum = ipnum;
+
+	hostdata = gethostbyaddr((const char *) &ipnum, sizeof(struct in_addr),
+				 AF_INET);
+	if (hostdata == NULL) {
+	    if (h_errno > MAX_ERR)
+		errors[UNKNOWN_ERR]++;
+	    else
+		errors[h_errno]++;
+	    new->noname = h_errno;
+	    name = strdup(inet_ntoa(ipnum));
+	}
+	else {
+	    new->noname = 0;
+	    name = strdup(hostdata->h_name);
+	    if (check) {
+		if (name == NULL) {
+		    perror("strdup");
+		    fprintf(stderr, "Insufficient memory\n");
+		    exit(1);
+		}
+		hostdata = gethostbyname(name);
+		if (hostdata != NULL) {
+		    char **hptr;
+
+		    for (hptr = hostdata->h_addr_list; *hptr != NULL; hptr++)
+			if (((struct in_addr *) (*hptr))->s_addr == ipnum.s_addr)
+			    break;
+		    if (*hptr == NULL)
+			hostdata = NULL;
+		}
+		if (hostdata == NULL) {
+		    fprintf(stderr, "Bad host: %s != %s\n", name,
+			    inet_ntoa(ipnum));
+		    new->noname = NO_REVERSE;
+		    free(name);
+		    name = strdup(inet_ntoa(ipnum));
+		    errors[NO_REVERSE]++;
+		}
+	    }
+	}
+	new->hostname = name;
+	if (new->hostname == NULL) {
+	    perror("strdup");
+	    fprintf(stderr, "Insufficient memory\n");
+	    exit(1);
+	}
+    }
+    else
+	cachehits++;
+
+    /* size of string == MAXDNAME +1 */
+    strncpy(string, (*current)->hostname, MAXDNAME);
+    string[MAXDNAME] = '\0';
+}
+
+/*
+ * prints various statistics to output
+ */
+
+static void stats (FILE *output)
+{
+    int i;
+    char *ipstring;
+    struct nsrec *current;
+    char *errstring[MAX_ERR + 3];
+
+    for (i = 0; i < MAX_ERR + 3; i++)
+	errstring[i] = "Unknown error";
+    errstring[HOST_NOT_FOUND] = "Host not found";
+    errstring[TRY_AGAIN] = "Try again";
+    errstring[NO_RECOVERY] = "Non recoverable error";
+    errstring[NO_DATA] = "No data record";
+    errstring[NO_ADDRESS] = "No address";
+    errstring[NO_REVERSE] = "No reverse entry";
+
+    fprintf(output, "logresolve Statistics:\n");
+
+    fprintf(output, "Entries: %d\n", entries);
+    fprintf(output, "    With name   : %d\n", withname);
+    fprintf(output, "    Resolves    : %d\n", resolves);
+    if (errors[HOST_NOT_FOUND])
+	fprintf(output, "    - Not found : %d\n", errors[HOST_NOT_FOUND]);
+    if (errors[TRY_AGAIN])
+	fprintf(output, "    - Try again : %d\n", errors[TRY_AGAIN]);
+    if (errors[NO_DATA])
+	fprintf(output, "    - No data   : %d\n", errors[NO_DATA]);
+    if (errors[NO_ADDRESS])
+	fprintf(output, "    - No address: %d\n", errors[NO_ADDRESS]);
+    if (errors[NO_REVERSE])
+	fprintf(output, "    - No reverse: %d\n", errors[NO_REVERSE]);
+    fprintf(output, "Cache hits      : %d\n", cachehits);
+    fprintf(output, "Cache size      : %d\n", cachesize);
+    fprintf(output, "Cache buckets   :     IP number * hostname\n");
+
+    for (i = 0; i < BUCKETS; i++)
+	for (current = nscache[i]; current != NULL; current = current->next) {
+	    ipstring = inet_ntoa(current->ipnum);
+	    if (current->noname == 0)
+		fprintf(output, "  %3d  %15s - %s\n", i, ipstring,
+			current->hostname);
+	    else {
+		if (current->noname > MAX_ERR + 2)
+		    fprintf(output, "  %3d  %15s : Unknown error\n", i,
+			    ipstring);
+		else
+		    fprintf(output, "  %3d  %15s : %s\n", i, ipstring,
+			    errstring[current->noname]);
+	    }
+	}
+}
+
+
+/*
+ * gets a line from stdin
+ */
+
+static int getline (char *s, int n)
+{
+    char *cp;
+
+    if (!fgets(s, n, stdin))
+	return (0);
+    cp = strchr(s, '\n');
+    if (cp)
+	*cp = '\0';
+    return (1);
+}
+
+int main (int argc, char *argv[])
+{
+    struct in_addr ipnum;
+    char *bar, hoststring[MAXDNAME + 1], line[MAXLINE], *statfile;
+    int i, check;
+
+    check = 0;
+    statfile = NULL;
+    for (i = 1; i < argc; i++) {
+	if (strcmp(argv[i], "-c") == 0)
+	    check = 1;
+	else if (strcmp(argv[i], "-s") == 0) {
+	    if (i == argc - 1) {
+		fprintf(stderr, "logresolve: missing filename to -s\n");
+		exit(1);
+	    }
+	    i++;
+	    statfile = argv[i];
+	}
+	else {
+	    fprintf(stderr, "Usage: logresolve [-s statfile] [-c] < input > output\n");
+	    exit(0);
+	}
+    }
+
+
+    for (i = 0; i < BUCKETS; i++)
+	nscache[i] = NULL;
+    for (i = 0; i < MAX_ERR + 2; i++)
+	errors[i] = 0;
+
+    while (getline(line, MAXLINE)) {
+	if (line[0] == '\0')
+	    continue;
+	entries++;
+	if (!isdigit(line[0])) {	/* short cut */
+	    puts(line);
+	    withname++;
+	    continue;
+	}
+	bar = strchr(line, ' ');
+	if (bar != NULL)
+	    *bar = '\0';
+	ipnum.s_addr = inet_addr(line);
+	if (ipnum.s_addr == 0xffffffffu) {
+	    if (bar != NULL)
+		*bar = ' ';
+	    puts(line);
+	    withname++;
+	    continue;
+	}
+
+	resolves++;
+
+	cgethost(ipnum, hoststring, check);
+	if (bar != NULL)
+	    printf("%s %s\n", hoststring, bar + 1);
+	else
+	    puts(hoststring);
+    }
+
+    if (statfile != NULL) {
+	FILE *fp;
+	fp = fopen(statfile, "w");
+	if (fp == NULL) {
+	    fprintf(stderr, "logresolve: could not open statistics file '%s'\n"
+		    ,statfile);
+	    exit(1);
+	}
+	stats(fp);
+	fclose(fp);
+    }
+
+    return (0);
+}