--- httpd-2.4.35/docs/man/ab.1.bak	2018-10-21 16:10:11.161024133 +0000
+++ httpd-2.4.35/docs/man/ab.1	2018-10-21 16:11:25.689793452 +0000
@@ -130,6 +130,9 @@
 \fB-X \fIproxy\fR[:\fIport\fR]\fR
 Use a proxy server for the requests\&.  
 .TP
+\fB-o \fIsrc_address\fR\fR
+Set the local source address\&.  
+.TP
 \fB-y \fI<tr>-attributes\fR\fR
 String to use as attributes for \fB<tr>\fR\&.  
 .TP
--- httpd-2.4.33/support/ab.c.ab_source_address.droplet	2018-03-16 01:02:58.000000000 +0200
+++ httpd-2.4.33/support/ab.c	2018-03-27 10:39:44.792971820 +0300
@@ -313,6 +313,7 @@
 const char *connecthost;
 const char *myhost;
 apr_port_t connectport;
+char *src_address;
 const char *gnuplot;          /* GNUplot file */
 const char *csvperc;          /* CSV Percentile file */
 const char *fullurl;
@@ -1299,6 +1300,7 @@
 static void start_connect(struct connection * c)
 {
     apr_status_t rv;
+    apr_sockaddr_t *from;
 
     if (!(started < requests))
         return;
@@ -1348,6 +1350,14 @@
         }
     }
 
+    if (src_address) {
+        if ((rv = apr_sockaddr_info_get(&from, src_address, destsa->family,
+                0, 0, c->ctx)) != APR_SUCCESS)
+                apr_err("src_address get", rv);
+        if ((rv = apr_socket_bind(c->aprsock, from)) != APR_SUCCESS)
+            apr_err("src_address bind", rv);
+    }
+
     c->start = lasttime = apr_time_now();
 #ifdef USE_SSL
     if (is_ssl) {
@@ -2085,6 +2095,7 @@
     fprintf(stderr, "    -P attribute    Add Basic Proxy Authentication, the attributes\n");
     fprintf(stderr, "                    are a colon separated username and password.\n");
     fprintf(stderr, "    -X proxy:port   Proxyserver and port number to use\n");
+    fprintf(stderr, "    -o src_address  Set the local source address\n");
     fprintf(stderr, "    -V              Print version number and exit\n");
     fprintf(stderr, "    -k              Use HTTP KeepAlive feature\n");
     fprintf(stderr, "    -d              Do not show percentiles served table.\n");
@@ -2351,7 +2351,7 @@
     myhost = NULL; /* 0.0.0.0 or :: */
 
     apr_getopt_init(&opt, cntxt, argc, argv);
-    while ((status = apr_getopt(opt, "n:c:t:s:b:T:p:u:v:lrkVhwiIx:y:z:C:H:P:A:g:X:de:SqB:m:"
+    while ((status = apr_getopt(opt, "o:n:c:t:s:b:T:p:u:v:lrkVhwiIx:y:z:C:H:P:A:g:X:de:SqB:m:"
 #ifdef USE_SSL
             "Z:f:E:"
 #endif
@@ -2305,6 +2316,9 @@
             case 'k':
                 keepalive = 1;
                 break;
+            case 'o':
+                src_address = strdup(optarg);
+                break;
             case 'q':
                 heartbeatres = 0;
                 break;