add script setup() and thread methods

CHANGES

@@ -1,4 +1,8 @@
-master
+wrk next
 
  * The wrk global variable is the only global defined by default.
  * wrk.init() calls the global init(), remove calls to wrk.init().
+ * Add wrk.lookup(host, port) and wrk.connect(addr) functions.
+ * Add setup phase that calls the global setup() for each thread.
+ * Allow assignment to thread.addr to specify the server address.
+ * Add thread:set(key, value), thread:get(key), and thread:stop().

Makefile

@@ -9,6 +9,7 @@ ifeq ($(TARGET), sunos)
 else ifeq ($(TARGET), darwin)
 	LDFLAGS += -pagezero_size 10000 -image_base 100000000
 else ifeq ($(TARGET), linux)
+	CFLAGS  += -D_POSIX_C_SOURCE=200112L -D_BSD_SOURCE
 	LIBS    += -ldl
 	LDFLAGS += -Wl,-E
 else ifeq ($(TARGET), freebsd)

README

@@ -5,8 +5,8 @@ wrk - a HTTP benchmarking tool
   design with scalable event notification systems such as epoll and kqueue.
 
   An optional LuaJIT script can perform HTTP request generation, response
-  processing, and custom reporting. Several example scripts are located in
-  scripts/
+  processing, and custom reporting. Details are available in SCRIPTING and
+  several examples are located in scripts/
 
 Basic Usage
 
@@ -26,65 +26,6 @@ Basic Usage
   Requests/sec: 748868.53
   Transfer/sec:    606.33MB
 
-Scripting
-
-  wrk's public Lua API is:
-
-    init     = function(args)
-    request  = function()
-    response = function(status, headers, body)
-    done     = function(summary, latency, requests)
-
-    wrk = {
-      scheme  = "http",
-      host    = "localhost",
-      port    = nil,
-      method  = "GET",
-      path    = "/",
-      headers = {},
-      body    = nil
-    }
-
-    function wrk.format(method, path, headers, body)
-
-      wrk.format returns a HTTP request string containing the passed
-      parameters merged with values from the wrk table.
-
-  The following globals are optional, and if defined must be functions:
-
-    global init     -- called when the thread is initialized
-    global request  -- returning the HTTP message for each request
-    global response -- called with HTTP response data
-    global done     -- called with results of run
-
-  The init() function receives any extra command line arguments for the
-  script which must be separated from wrk arguments with "--".
-
-  The done() function receives a table containing result data, and two
-  statistics objects representing the sampled per-request latency and
-  per-thread request rate. Duration and latency are microsecond values
-  and rate is measured in requests per second.
-
-    latency.min              -- minimum value seen
-    latency.max              -- maximum value seen
-    latency.mean             -- average value seen
-    latency.stdev            -- standard deviation
-    latency:percentile(99.0) -- 99th percentile value
-    latency[i]               -- raw sample value
-
-    summary = {
-      duration = N,  -- run duration in microseconds
-      requests = N,  -- total completed requests
-      bytes    = N,  -- total bytes received
-      errors   = {
-        connect = N, -- total socket connection errors
-        read    = N, -- total socket read errors
-        write   = N, -- total socket write errors
-        status  = N, -- total HTTP status codes > 399
-        timeout = N  -- total request timeouts
-      }
-    }
-
 Benchmarking Tips
 
   The machine running wrk must have a sufficient number of ephemeral ports
@@ -93,11 +34,9 @@ Benchmarking Tips
   than the number of concurrent connections being tested.
 
   A user script that only changes the HTTP method, path, adds headers or
-  a body, will have no performance impact. If multiple HTTP requests are
-  necessary they should be pre-generated and returned via a quick lookup in
-  the request() call. Per-request actions, particularly building a new HTTP
-  request, and use of response() will necessarily reduce the amount of load
-  that can be generated.
+  a body, will have no performance impact. Per-request actions, particularly
+  building a new HTTP request, and use of response() will necessarily reduce
+  the amount of load that can be generated.
 
 Acknowledgements
 

SCRIPTING

@@ -0,0 +1,112 @@
+Overview
+
+  wrk supports executing a LuaJIT script during three distinct phases: setup,
+  running, and done. Each wrk thread has an independent scripting environment
+  and the setup & done phases execute in a separate environment which does
+  not participate in the running phase.
+
+  The public Lua API consists of a global table and a number of global
+  functions:
+
+  wrk = {
+    scheme  = "http",
+    host    = "localhost",
+    port    = nil,
+    method  = "GET",
+    path    = "/",
+    headers = {},
+    body    = nil,
+    thread  = <userdata>,
+  }
+
+  function wrk.format(method, path, headers, body)
+
+    wrk.format returns a HTTP request string containing the passed parameters
+    merged with values from the wrk table.
+
+  function wrk.lookup(host, service)
+
+    wrk.lookup returns a table containing all known addresses for the host
+    and service pair. This corresponds to the POSIX getaddrinfo() function.
+
+  function wrk.connect(addr)
+
+    wrk.connect returns true if the address can be connected to, otherwise
+    it returns false. The address must be one returned from wrk.lookup().
+
+  The following globals are optional, and if defined must be functions:
+
+    global setup    -- called during thread setup
+    global init     -- called when the thread is starting
+    global request  -- called to generate the HTTP request
+    global response -- called with HTTP response data
+    global done     -- called with results of run
+
+Setup
+
+  function setup(thread)
+
+  The setup phase begins after the target IP address has been resolved and all
+  threads have been initialized but not yet started.
+
+  setup() is called once for each thread and receives a userdata object
+  representing the thread.
+
+    thread.addr            - get or set the thread's server address
+    thread:get(key)        - get the value of a global in the thread's env
+    thread:set(key, value) - set the value of a global in the thread's env
+    thread:stop()          - stop the thread
+
+  Only boolean, nil, number, and string values or tables of the same may be
+  transfered via get()/set() and thread:stop() can only be called while the
+  thread is running.
+
+Running
+
+  function init(args)
+  function request()
+  function response(status, headers, body)
+
+  The running phase begins with a single call to init(), followed by
+  a call to request() and response() for each request cycle.
+
+  The init() function receives any extra command line arguments for the
+  script which must be separated from wrk arguments with "--".
+
+  request() returns a string containing the HTTP request. Building a new
+  request each time is expensive, when testing a high performance server
+  one solution is to pre-generate all requests in init() and do a quick
+  lookup in request().
+
+  response() is called with the HTTP response status, headers, and body.
+  Parsing the headers and body is expensive, so if the response global is
+  nil after the call to init() wrk will ignore the headers and body.
+
+Done
+
+  function done(summary, latency, requests)
+
+  The done() function receives a table containing result data, and two
+  statistics objects representing the sampled per-request latency and
+  per-thread request rate. Duration and latency are microsecond values
+  and rate is measured in requests per second.
+
+  latency.min              -- minimum value seen
+  latency.max              -- maximum value seen
+  latency.mean             -- average value seen
+  latency.stdev            -- standard deviation
+  latency:percentile(99.0) -- 99th percentile value
+  latency[i]               -- raw sample value
+
+  summary = {
+    duration = N,  -- run duration in microseconds
+    requests = N,  -- total completed requests
+    bytes    = N,  -- total bytes received
+    errors   = {
+      connect = N, -- total socket connection errors
+      read    = N, -- total socket read errors
+      write   = N, -- total socket write errors
+      status  = N, -- total HTTP status codes > 399
+      timeout = N  -- total request timeouts
+    }
+  }

scripts/addr.lua

@@ -0,0 +1,22 @@
+-- example script that demonstrates use of setup() to pass
+-- a random server address to each thread
+
+local addrs = nil
+
+function setup(thread)
+   if not addrs then
+      addrs = wrk.lookup(wrk.host, wrk.port or "http")
+      for i = #addrs, 1, -1 do
+         if not wrk.connect(addrs[i]) then
+            table.remove(addrs, i)
+         end
+      end
+   end
+
+   thread.addr = addrs[math.random(#addrs)]
+end
+
+function init(args)
+   local msg = "thread addr: %s"
+   print(msg:format(wrk.thread.addr))
+end

scripts/setup.lua

@@ -0,0 +1,38 @@
+-- example script that demonstrates use of setup() to pass
+-- data to and from the threads
+
+local counter = 1
+local threads = {}
+
+function setup(thread)
+   thread:set("id", counter)
+   table.insert(threads, thread)
+   counter = counter + 1
+end
+
+function init(args)
+   requests  = 0
+   responses = 0
+
+   local msg = "thread %d created"
+   print(msg:format(id))
+end
+
+function request()
+   requests = requests + 1
+   return wrk.request()
+end
+
+function response(status, headers, body)
+   responses = responses + 1
+end
+
+function done(summary, latency, requests)
+   for index, thread in ipairs(threads) do
+      local id        = thread:get("id")
+      local requests  = thread:get("requests")
+      local responses = thread:get("responses")
+      local msg = "thread %d made %d requests and got %d responses"
+      print(msg:format(id, requests, responses))
+   end
+end

scripts/stop.lua

@@ -0,0 +1,10 @@
+-- example script that demonstrates use of thread:stop()
+
+local counter = 1
+
+function response()
+   if counter == 100 then
+      wrk.thread:stop()
+   end
+   counter = counter + 1
+end

src/config.h

@@ -5,7 +5,6 @@
 #define HAVE_KQUEUE
 #elif defined(__linux__)
 #define HAVE_EPOLL
-#define _POSIX_C_SOURCE 200809L
 #elif defined (__sun)
 #define HAVE_EVPORT
 #endif

src/main.h

@@ -16,7 +16,6 @@
 #include <signal.h>
 #include <time.h>
 #include <unistd.h>
-#include <sys/socket.h>
 #include <sys/time.h>
 #include <sys/uio.h>
 

src/script.c

@@ -15,9 +15,12 @@ typedef struct {
 static int script_addr_tostring(lua_State *);
 static int script_addr_gc(lua_State *);
 static int script_stats_len(lua_State *);
-static int script_stats_get(lua_State *);
+static int script_stats_index(lua_State *);
+static int script_thread_index(lua_State *);
+static int script_thread_newindex(lua_State *);
 static int script_wrk_lookup(lua_State *);
 static int script_wrk_connect(lua_State *);
+
 static void set_fields(lua_State *, int index, const table_field *);
 
 static const struct luaL_reg addrlib[] = {
@@ -27,23 +30,28 @@ static const struct luaL_reg addrlib[] = {
 };
 
 static const struct luaL_reg statslib[] = {
-    { "__index", script_stats_get },
+    { "__index",    script_stats_index     },
     { "__len",      script_stats_len       },
     { NULL,         NULL                   }
 };
 
-lua_State *script_create(char *scheme, char *host, char *port, char *path) {
+static const struct luaL_reg threadlib[] = {
+    { "__index",    script_thread_index    },
+    { "__newindex", script_thread_newindex },
+    { NULL,         NULL                   }
+};
+
+lua_State *script_create(char *file, char *scheme, char *host, char *port, char *path) {
     lua_State *L = luaL_newstate();
     luaL_openlibs(L);
-    luaL_dostring(L, "wrk = require \"wrk\"");
+    (void) luaL_dostring(L, "wrk = require \"wrk\"");
 
     luaL_newmetatable(L, "wrk.addr");
     luaL_register(L, NULL, addrlib);
-    lua_pop(L, 1);
-
     luaL_newmetatable(L, "wrk.stats");
     luaL_register(L, NULL, statslib);
-    lua_pop(L, 1);
+    luaL_newmetatable(L, "wrk.thread");
+    luaL_register(L, NULL, threadlib);
 
     const table_field fields[] = {
         { "scheme",  LUA_TSTRING,   scheme             },
@@ -56,19 +64,17 @@ lua_State *script_create(char *scheme, char *host, char *port, char *path) {
     };
 
     lua_getglobal(L, "wrk");
-    set_fields(L, 1, fields);
-    lua_pop(L, 1);
+    set_fields(L, 4, fields);
+    lua_pop(L, 4);
+
+    if (file && luaL_dofile(L, file)) {
+        const char *cause = lua_tostring(L, -1);
+        fprintf(stderr, "%s: %s\n", file, cause);
+    }
 
     return L;
 }
 
-void script_prepare_setup(lua_State *L, char *script) {
-    if (script && luaL_dofile(L, script)) {
-        const char *cause = lua_tostring(L, -1);
-        fprintf(stderr, "%s: %s\n", script, cause);
-    }
-}
-
 bool script_resolve(lua_State *L, char *host, char *service) {
     lua_getglobal(L, "wrk");
 
@@ -83,13 +89,24 @@ bool script_resolve(lua_State *L, char *host, char *service) {
     return count > 0;
 }
 
-struct addrinfo *script_peek_addr(lua_State *L) {
+void script_push_thread(lua_State *L, thread *t) {
+    thread **ptr = (thread **) lua_newuserdata(L, sizeof(thread **));
+    *ptr = t;
+    luaL_getmetatable(L, "wrk.thread");
+    lua_setmetatable(L, -2);
+}
+
+void script_setup(lua_State *L, thread *t) {
+    lua_getglobal(t->L, "wrk");
+    script_push_thread(t->L, t);
+    lua_setfield(t->L, -2, "thread");
+    lua_pop(t->L, 1);
+
     lua_getglobal(L, "wrk");
-    lua_getfield(L, -1, "addrs");
-    lua_rawgeti(L, -1, 1);
-    struct addrinfo *addr = lua_touserdata(L, -1);
-    lua_pop(L, 3);
-    return addr;
+    lua_getfield(L, -1, "setup");
+    script_push_thread(L, t);
+    lua_call(L, 1, 0);
+    lua_pop(L, 1);
 }
 
 void script_headers(lua_State *L, char **headers) {
@@ -106,12 +123,7 @@ void script_headers(lua_State *L, char **headers) {
     lua_pop(L, 2);
 }
 
-void script_init(lua_State *L, char *script, int argc, char **argv) {
-    if (script && luaL_dofile(L, script)) {
-        const char *cause = lua_tostring(L, -1);
-        fprintf(stderr, "%s: %s\n", script, cause);
-    }
-
+void script_init(lua_State *L, int argc, char **argv) {
     lua_getglobal(L, "wrk");
     lua_getfield(L, -1, "init");
     lua_newtable(L);
@@ -211,21 +223,19 @@ void script_errors(lua_State *L, errors *errors) {
     lua_setfield(L, 1, "errors");
 }
 
-void script_done(lua_State *L, stats *latency, stats *requests) {
-    stats **s;
+void script_push_stats(lua_State *L, stats *s) {
+    stats **ptr = (stats **) lua_newuserdata(L, sizeof(stats **));
+    *ptr = s;
+    luaL_getmetatable(L, "wrk.stats");
+    lua_setmetatable(L, -2);
+}
 
+void script_done(lua_State *L, stats *latency, stats *requests) {
     lua_getglobal(L, "done");
     lua_pushvalue(L, 1);
 
-    s = (stats **) lua_newuserdata(L, sizeof(stats **));
-    *s = latency;
-    luaL_getmetatable(L, "wrk.stats");
-    lua_setmetatable(L, 4);
-
-    s = (stats **) lua_newuserdata(L, sizeof(stats **));
-    *s = requests;
-    luaL_getmetatable(L, "wrk.stats");
-    lua_setmetatable(L, 5);
+    script_push_stats(L, latency);
+    script_push_stats(L, requests);
 
     lua_call(L, 3, 0);
     lua_pop(L, 1);
@@ -278,6 +288,20 @@ static struct addrinfo *checkaddr(lua_State *L) {
     return addr;
 }
 
+void script_addr_copy(struct addrinfo *src, struct addrinfo *dst) {
+    *dst = *src;
+    dst->ai_addr = zmalloc(src->ai_addrlen);
+    memcpy(dst->ai_addr, src->ai_addr, src->ai_addrlen);
+}
+
+struct addrinfo *script_addr_clone(lua_State *L, struct addrinfo *addr) {
+    struct addrinfo *udata = lua_newuserdata(L, sizeof(*udata));
+    luaL_getmetatable(L, "wrk.addr");
+    lua_setmetatable(L, -2);
+    script_addr_copy(addr, udata);
+    return udata;
+}
+
 static int script_addr_tostring(lua_State *L) {
     struct addrinfo *addr = checkaddr(L);
     char host[NI_MAXHOST];
@@ -313,7 +337,7 @@ static int script_stats_percentile(lua_State *L) {
     return 1;
 }
 
-static int script_stats_get(lua_State *L) {
+static int script_stats_index(lua_State *L) {
     stats *s = checkstats(L);
     if (lua_isnumber(L, 2)) {
         int index = luaL_checkint(L, 2);
@@ -337,6 +361,59 @@ static int script_stats_len(lua_State *L) {
     return 1;
 }
 
+static thread *checkthread(lua_State *L) {
+    thread **t = luaL_checkudata(L, 1, "wrk.thread");
+    luaL_argcheck(L, t != NULL, 1, "`thread' expected");
+    return *t;
+}
+
+static int script_thread_get(lua_State *L) {
+    thread *t = checkthread(L);
+    const char *key = lua_tostring(L, -1);
+    lua_getglobal(t->L, key);
+    script_copy_value(t->L, L, -1);
+    lua_pop(t->L, 1);
+    return 1;
+}
+
+static int script_thread_set(lua_State *L) {
+    thread *t = checkthread(L);
+    const char *key = lua_tostring(L, -2);
+    script_copy_value(L, t->L, -1);
+    lua_setglobal(t->L, key);
+    return 0;
+}
+
+static int script_thread_stop(lua_State *L) {
+    thread *t = checkthread(L);
+    aeStop(t->loop);
+    return 0;
+}
+
+static int script_thread_index(lua_State *L) {
+    thread *t = checkthread(L);
+    const char *key = lua_tostring(L, 2);
+    if (!strcmp("get",  key)) lua_pushcfunction(L, script_thread_get);
+    if (!strcmp("set",  key)) lua_pushcfunction(L, script_thread_set);
+    if (!strcmp("stop", key)) lua_pushcfunction(L, script_thread_stop);
+    if (!strcmp("addr", key)) script_addr_clone(L, t->addr);
+    return 1;
+}
+
+static int script_thread_newindex(lua_State *L) {
+    thread *t = checkthread(L);
+    const char *key = lua_tostring(L, -2);
+    if (!strcmp("addr", key)) {
+        struct addrinfo *addr = checkaddr(L);
+        if (t->addr) zfree(t->addr->ai_addr);
+        t->addr = zrealloc(t->addr, sizeof(*addr));
+        script_addr_copy(addr, t->addr);
+    } else {
+        luaL_error(L, "cannot set '%s' on thread", luaL_typename(L, -1));
+    }
+    return 0;
+}
+
 static int script_wrk_lookup(lua_State *L) {
     struct addrinfo *addrs;
     struct addrinfo hints = {
@@ -356,13 +433,7 @@ static int script_wrk_lookup(lua_State *L) {
 
     lua_newtable(L);
     for (struct addrinfo *addr = addrs; addr != NULL; addr = addr->ai_next) {
-        struct addrinfo *udata = lua_newuserdata(L, sizeof(*udata));
-        luaL_getmetatable(L, "wrk.addr");
-        lua_setmetatable(L, -2);
-
-        *udata = *addr;
-        udata->ai_addr = zmalloc(addr->ai_addrlen);
-        memcpy(udata->ai_addr, addr->ai_addr, addr->ai_addrlen);
+        script_addr_clone(L, addr);
         lua_rawseti(L, -2, index++);
     }
 
@@ -381,6 +452,36 @@ static int script_wrk_connect(lua_State *L) {
     return 1;
 }
 
+void script_copy_value(lua_State *src, lua_State *dst, int index) {
+    switch (lua_type(src, index)) {
+        case LUA_TBOOLEAN:
+            lua_pushboolean(dst, lua_toboolean(src, index));
+            break;
+        case LUA_TNIL:
+            lua_pushnil(dst);
+            break;
+        case LUA_TNUMBER:
+            lua_pushnumber(dst, lua_tonumber(src, index));
+            break;
+        case LUA_TSTRING:
+            lua_pushstring(dst, lua_tostring(src, index));
+            break;
+        case LUA_TTABLE:
+            lua_newtable(dst);
+            lua_pushnil(src);
+            while (lua_next(src, index - 1)) {
+                script_copy_value(src, dst, -1);
+                script_copy_value(src, dst, -2);
+                lua_settable(dst, -3);
+                lua_pop(src, 1);
+            }
+            lua_pop(src, 1);
+            break;
+        default:
+            luaL_error(src, "cannot transfer '%s' to thread", luaL_typename(src, index));
+    }
+}
+
 static void set_fields(lua_State *L, int index, const table_field *fields) {
     for (int i = 0; fields[i].name; i++) {
         table_field f = fields[i];

src/script.h

@@ -5,28 +5,21 @@
 #include <lua.h>
 #include <lualib.h>
 #include <lauxlib.h>
-#include <sys/types.h>
-#include <netdb.h>
 #include <unistd.h>
 #include "stats.h"
+#include "wrk.h"
 
-typedef struct {
-    char  *buffer;
-    size_t length;
-    char  *cursor;
-} buffer;
+lua_State *script_create(char *, char *, char *, char *, char *);
 
-lua_State *script_create(char *, char *, char *, char *);
-void script_prepare_setup(lua_State *, char *);
 bool script_resolve(lua_State *, char *, char *);
-struct addrinfo *script_peek_addr(lua_State *);
-void script_headers(lua_State *, char **);
-size_t script_verify_request(lua_State *L);
-
-void script_init(lua_State *, char *, int, char **);
+void script_setup(lua_State *, thread *);
 void script_done(lua_State *, stats *, stats *);
+
+void script_headers(lua_State *, char **);
+void script_init(lua_State *, int, char **);
 void script_request(lua_State *, char **, size_t *);
 void script_response(lua_State *, int, buffer *, buffer *);
+size_t script_verify_request(lua_State *L);
 
 bool script_is_static(lua_State *);
 bool script_want_response(lua_State *L);
@@ -34,6 +27,8 @@ bool script_has_done(lua_State *L);
 void script_summary(lua_State *, uint64_t, uint64_t, uint64_t);
 void script_errors(lua_State *, errors *);
 
+void script_copy_value(lua_State *, lua_State *, int);
+
 void buffer_append(buffer *, const char *, size_t);
 void buffer_reset(buffer *);
 char *buffer_pushlstring(lua_State *, char *);

src/wrk.c

@@ -1,6 +1,7 @@
 // Copyright (C) 2012 - Will Glozer.  All rights reserved.
 
 #include "wrk.h"
+#include "script.h"
 #include "main.h"
 
 static struct config {
@@ -82,14 +83,6 @@ int main(int argc, char **argv) {
         path = &url[parser_url.field_data[UF_PATH].off];
     }
 
-    lua_State *L = script_create(schema, host, port, path);
-    script_prepare_setup(L, cfg.script);
-    if (!script_resolve(L, host, service)) {
-        char *msg = strerror(errno);
-        fprintf(stderr, "unable to connect to %s:%s %s\n", host, service, msg);
-        exit(1);
-    }
-
     if (!strncmp("https", schema, 5)) {
         if ((cfg.ctx = ssl_init()) == NULL) {
             fprintf(stderr, "unable to initialize SSL\n");
@@ -111,19 +104,25 @@ int main(int argc, char **argv) {
     statistics.requests = stats_alloc(SAMPLES);
 
     thread *threads = zcalloc(cfg.threads * sizeof(thread));
-    uint64_t connections = cfg.connections / cfg.threads;
     uint64_t stop_at = time_us() + (cfg.duration * 1000000);
 
+    lua_State *L = script_create(cfg.script, schema, host, port, path);
+    if (!script_resolve(L, host, service)) {
+        char *msg = strerror(errno);
+        fprintf(stderr, "unable to connect to %s:%s %s\n", host, service, msg);
+        exit(1);
+    }
+
     for (uint64_t i = 0; i < cfg.threads; i++) {
         thread *t      = &threads[i];
         t->loop        = aeCreateEventLoop(10 + cfg.connections * 3);
-        t->addr        = script_peek_addr(L);
-        t->connections = connections;
+        t->connections = cfg.connections / cfg.threads;
         t->stop_at     = stop_at;
 
-        t->L = script_create(schema, host, port, path);
+        t->L = script_create(cfg.script, schema, host, port, path);
         script_headers(t->L, headers);
-        script_init(t->L, cfg.script, argc - optind, &argv[optind]);
+        script_setup(L, t);
+        script_init(t->L, argc - optind, &argv[optind]);
 
         if (i == 0) {
             cfg.pipeline = script_verify_request(t->L);
@@ -474,7 +473,6 @@ static void socket_writeable(aeEventLoop *loop, int fd, void *data, int mask) {
     reconnect_socket(thread, c);
 }
 
-
 static void socket_readable(aeEventLoop *loop, int fd, void *data, int mask) {
     connection *c = data;
     size_t n;

src/wrk.h

@@ -6,13 +6,14 @@
 #include <inttypes.h>
 #include <sys/types.h>
 #include <netdb.h>
+#include <sys/socket.h>
 
 #include <openssl/ssl.h>
 #include <openssl/err.h>
+#include <lua.h>
 
 #include "stats.h"
 #include "ae.h"
-#include "script.h"
 #include "http_parser.h"
 
 #define VERSION  "3.1.2"
@@ -43,6 +44,12 @@ typedef struct {
     struct connection *cs;
 } thread;
 
+typedef struct {
+    char  *buffer;
+    size_t length;
+    char  *cursor;
+} buffer;
+
 typedef struct connection {
     thread *thread;
     http_parser parser;

src/wrk.lua

@@ -5,7 +5,8 @@ local wrk = {
    method  = "GET",
    path    = "/",
    headers = {},
-   body    = nil
+   body    = nil,
+   thread  = nil,
 }
 
 function wrk.resolve(host, service)
@@ -18,6 +19,13 @@ function wrk.resolve(host, service)
    wrk.addrs = addrs
 end
 
+function wrk.setup(thread)
+   thread.addr = wrk.addrs[1]
+   if type(setup) == "function" then
+      setup(thread)
+   end
+end
+
 function wrk.init(args)
    if not wrk.headers["Host"] then
       local host = wrk.host