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ограничение входящих соеденений с 1 IP в apache (apache http limit patch)


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Ключевые слова: apache, http, limit, patch,  (найти похожие документы)
From: Eugene Grosbein <Eugene.Grosbein@f1.n5006.z2.fidonet.org> Date: Mon, 13 Nov 2000 11:46:13 +0300 Subject: ограничение входящих соеденений с 1 IP в apache X-newsgroup: fido.ru.unix Sun, 12 Nov 2000 20:47:16 +0700, Sergey Shibeko написал(а): >Каким образом ограничить количество входящих соеденений с одного >адреса в apache? Hужно, чтобы любители многопотоковых качалок не >получили преимущиства. >Возможно ли сделать это для виртуального сервера? Есть патч к сорцам, вводящий команды MaxServersPerIP и MaxServersPerIPRead. Автор его почему-то привязал к 1.3.9rusPL29.0. У меня PL29.2, так я его просто подправил под это имя - работает уже давно. diff -ur apache_1.3.9rusPL29.2/src/include/http_conf_globals.h apache_1.3.9rusPL29.2-patch/src/include/http_conf_globals.h - --- apache_1.3.9rusPL29.2/src/include/http_conf_globals.h Sat Aug 21 02:44:56 1999 +++ apache_1.3.9rusPL29.2-patch/src/include/http_conf_globals.h Tue Sep 21 17:34:52 1999 @@ -86,6 +86,8 @@ extern int ap_daemons_limit; extern MODULE_VAR_EXPORT int ap_suexec_enabled; extern int ap_listenbacklog; +extern int ap_daemons_max_by_ip; +extern int ap_daemons_max_by_ip_read; extern int ap_dump_settings; extern API_VAR_EXPORT int ap_extended_status; diff -ur apache_1.3.9rusPL29.2/src/include/http_main.h apache_1.3.9rusPL29.2-patch/src/include/http_main.h - --- apache_1.3.9rusPL29.2/src/include/http_main.h Thu Jan 14 12:39:26 1999 +++ apache_1.3.9rusPL29.2-patch/src/include/http_main.h Tue Sep 21 17:34:53 1999 @@ -127,6 +127,9 @@ unsigned int ap_set_callback_and_alarm(void (*fn) (int), int x); API_EXPORT(int) ap_check_alarm(void); +void update_child_status_remote_ip (int, conn_rec *); +int count_connections (conn_rec *, int); + #ifndef NO_OTHER_CHILD /* * register an other_child -- a child which the main loop keeps track of diff -ur apache_1.3.9rusPL29.2/src/include/httpd.h apache_1.3.9rusPL29.2-patch/src/include/httpd.h - --- apache_1.3.9rusPL29.2/src/include/httpd.h Thu Sep 2 22:59:02 1999 +++ apache_1.3.9rusPL29.2-patch/src/include/httpd.h Tue Sep 21 17:34:53 1999 @@ -297,6 +297,12 @@ #define DEFAULT_MIN_FREE_DAEMON 5 #endif +/* Define default limits for MaxDaemons serving a single address */ + +#define DEFAULT_MAX_DAEMONS_BY_IP 150 +#define DEFAULT_MAX_DAEMONS_BY_IP_READ 75 +#define LIMIT_CONNECTIONS_BY_IP_ERROR HTTP_SERVICE_UNAVAILABLE + /* Limit on the total --- clients will be locked out if more servers than * this are needed. It is intended solely to keep the server from crashing * when things get out of hand. diff -ur apache_1.3.9rusPL29.2/src/include/scoreboard.h apache_1.3.9rusPL29.2-patch/src/include/scoreboard.h - --- apache_1.3.9rusPL29.2/src/include/scoreboard.h Sat Aug 21 02:45:00 1999 +++ apache_1.3.9rusPL29.2-patch/src/include/scoreboard.h Tue Sep 21 17:34:53 1999 @@ -159,6 +159,7 @@ char request[64]; /* We just want an idea... */ server_rec *vhostrec; /* What virtual host is being accessed? */ /* SEE ABOVE FOR SAFE USAGE! */ + unsigned long remoteip; } short_score; typedef struct { diff -ur apache_1.3.9rusPL29.2/src/main/http_config.c apache_1.3.9rusPL29.2-patch/src/main/http_config.c - --- apache_1.3.9rusPL29.2/src/main/http_config.c Sat Aug 21 02:45:03 1999 +++ apache_1.3.9rusPL29.2-patch/src/main/http_config.c Tue Sep 21 17:34:53 1999 @@ -1399,6 +1399,8 @@ ap_daemons_to_start = DEFAULT_START_DAEMON; ap_daemons_min_free = DEFAULT_MIN_FREE_DAEMON; ap_daemons_max_free = DEFAULT_MAX_FREE_DAEMON; + ap_daemons_max_by_ip = DEFAULT_MAX_DAEMONS_BY_IP; + ap_daemons_max_by_ip_read = DEFAULT_MAX_DAEMONS_BY_IP_READ; ap_daemons_limit = HARD_SERVER_LIMIT; ap_pid_fname = DEFAULT_PIDLOG; ap_scoreboard_fname = DEFAULT_SCOREBOARD; diff -ur apache_1.3.9rusPL29.2/src/main/http_core.c apache_1.3.9rusPL29.2-patch/src/main/http_core.c - --- apache_1.3.9rusPL29.2/src/main/http_core.c Sat Aug 21 02:45:03 1999 +++ apache_1.3.9rusPL29.2-patch/src/main/http_core.c Tue Sep 21 17:34:53 1999 @@ -2182,6 +2182,16 @@ return NULL; } +const char * set_max_servers_by_ip (cmd_parms *cmd, void *dummy, char *arg) { + ap_daemons_max_by_ip = atoi (arg); + return NULL; +} + +const char * set_max_servers_by_ip_read (cmd_parms *cmd,void *dummy,char *arg) { + ap_daemons_max_by_ip_read = atoi (arg); + return NULL; +} + static const char *set_min_free_servers(cmd_parms *cmd, void *dummy, char *arg) { const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); @@ -2852,6 +2862,10 @@ "Maximum number of idle children" }, { "MaxServers", set_max_free_servers, NULL, RSRC_CONF, TAKE1, "Deprecated equivalent to MaxSpareServers" }, +{ "MaxServersPerIP", set_max_servers_by_ip, NULL, RSRC_CONF, TAKE1, + "Maximum number of connections from a single IP address" }, +{ "MaxServersPerIPRead", set_max_servers_by_ip_read, NULL, RSRC_CONF, TAKE1, + "Maximum number of connection from a single IP address in read state at any time." }, { "ServersSafetyLimit", set_server_limit, NULL, RSRC_CONF, TAKE1, "Deprecated equivalent to MaxClients" }, { "MaxClients", set_server_limit, NULL, RSRC_CONF, TAKE1, diff -ur apache_1.3.9rusPL29.2/src/main/http_main.c apache_1.3.9rusPL29.2-patch/src/main/http_main.c - --- apache_1.3.9rusPL29.2/src/main/http_main.c Sat Aug 21 02:45:05 1999 +++ apache_1.3.9rusPL29.2-patch/src/main/http_main.c Tue Sep 21 17:37:07 1999 @@ -249,6 +249,8 @@ int ap_daemons_to_start=0; int ap_daemons_min_free=0; int ap_daemons_max_free=0; +int ap_daemons_max_by_ip; +int ap_daemons_max_by_ip_read; int ap_daemons_limit=0; time_t ap_restart_time=0; int ap_suexec_enabled = 0; @@ -2183,6 +2185,38 @@ return old_status; } +void update_child_status_remote_ip (int child_num, conn_rec * current_conn) +{ + int slot_size; + short_score new_score_rec; + + if (child_num < 0) { return; } + +printf("update ip %u\n", current_conn->remote_addr.sin_addr.s_addr); + + ap_sync_scoreboard_image(); + new_score_rec = ap_scoreboard_image->servers[child_num]; + + slot_size = sizeof(new_score_rec.remoteip) - 1; + + if (current_conn) + { + new_score_rec.remoteip = current_conn->remote_addr.sin_addr.s_addr; + } + else + { + new_score_rec.remoteip = 0; + } +#if defined(HAVE_MMAP) || defined(HAVE_SHMGET) + memcpy(&ap_scoreboard_image->servers[child_num], &new_score_rec, sizeof new_score_rec); +#else + lseek (scoreboard_fd, (long)child_num * sizeof(short_score), 0); + force_write (scoreboard_fd, (char*)&new_score_rec, sizeof(short_score)); +#endif + + ap_sync_scoreboard_image(); +} + static void update_scoreboard_global(void) { #ifdef SCOREBOARD_FILE @@ -2193,6 +2227,26 @@ #endif } +int count_connections (conn_rec * current_conn, int state) +{ + unsigned long remote_ip = current_conn->remote_addr.sin_addr.s_addr; + int res = 0, i; + + for (i = 0; i < HARD_SERVER_LIMIT; i++) + { + if ((ap_scoreboard_image->servers[i].status == SERVER_DEAD) || + (state > 0 && ap_scoreboard_image->servers[i].status != state)) + { + continue; + } + if (ap_scoreboard_image->servers[i].remoteip == remote_ip) + { + res++; + } + } + return res; +} + void ap_time_process_request(int child_num, int status) { short_score *ss; @@ -4021,12 +4075,15 @@ * until no requests are left or we decide to close. */ - while ((r = ap_read_request(current_conn)) != NULL) { + for (;;){ + if (ap_daemons_max_by_ip || ap_daemons_max_by_ip_read) + update_child_status_remote_ip (my_child_num, (conn_rec *)current_conn); + + if ((r = ap_read_request(current_conn)) == NULL) break; /* read_request_line has already done a * signal (SIGUSR1, SIG_IGN); */ - (void) ap_update_child_status(my_child_num, SERVER_BUSY_WRITE, r); /* process the request if it was read without error */ @@ -5248,7 +5305,10 @@ * until no requests are left or we decide to close. */ - while ((r = ap_read_request(current_conn)) != NULL) { + for (;;){ + if (daemons_max_by_ip || daemons_max_by_ip_read) + update_child_status_remote_ip (child_num, (conn_rec *)current_conn); + if ((r = ap_read_request(current_conn)) == NULL) break; (void) ap_update_child_status(child_num, SERVER_BUSY_WRITE, r); if (r->status == HTTP_OK) @@ -5273,6 +5333,10 @@ * client has ACKed our FIN and/or has stopped sending us data. */ ap_kill_cleanups_for_socket(ptrans, csd); + + if (daemons_max_by_ip || daemons_max_by_ip_read) + update_child_status_remote_ip (child_num, (conn_rec *)NULL); + #ifdef NO_LINGCLOSE ap_bclose(conn_io); /* just close it */ diff -ur apache_1.3.9rusPL29.2/src/main/http_protocol.c apache_1.3.9rusPL29.2-patch/src/main/http_protocol.c - --- apache_1.3.9rusPL29.2/src/main/http_protocol.c Thu Sep 2 22:59:02 1999 +++ apache_1.3.9rusPL29.2-patch/src/main/http_protocol.c Tue Sep 21 17:34:55 1999 @@ -73,6 +73,15 @@ #include "http_log.h" /* For errors detected in basic auth common * support code... */ #include "util_date.h" /* For parseHTTPdate and BAD_DATE */ + +#include "scoreboard.h" /* for limiting connections by IP */ +#ifndef LONG_STRING_LEN +#define LONG_STRING_LEN 2048 +#endif /* LONG_STRING_LEN */ +extern int ap_daemons_max_by_ip; +extern int ap_daemons_max_by_ip_read; +extern void ap_die(); + #include <stdarg.h> #include "http_conf_globals.h" @@ -935,6 +944,8 @@ pool *p; const char *expect; int access_status; + int current_connections; + char *reject_state = NULL; p = ap_make_sub_pool(conn->pool); r = ap_pcalloc(p, sizeof(request_rec)); @@ -966,6 +977,33 @@ r->read_length = 0; r->read_body = REQUEST_NO_BODY; + if (ap_daemons_max_by_ip && ((current_connections = count_connections(conn,0)) + > ap_daemons_max_by_ip)) + { + r->request_time=time(NULL); + reject_state = "total"; + } + else if (ap_daemons_max_by_ip_read && + ((current_connections = count_connections(conn,SERVER_BUSY_READ)) + > ap_daemons_max_by_ip_read)) + { + reject_state = "read state"; + } + if (reject_state) { + r->status = HTTP_OK; + r->request_time = time(NULL); + r->proto_num = 1000; /* or something */ + r->assbackwards = 0; /* who knows... */ + r->protocol = "HTTP/1.0"; /* just not empty */ + r->the_request = NULL; + r->method = NULL; + r->method_number = M_INVALID; + ap_die(LIMIT_CONNECTIONS_BY_IP_ERROR, r); + ap_log_transaction(r); + ap_log_error(APLOG_MARK, APLOG_ERR | APLOG_NOERRNO, conn->server, "Client at %s for %s with %d %s current connections", conn->remote_ip, conn->server->server_hostname, current_connections, reject_state); + return NULL; + } + r->status = HTTP_REQUEST_TIME_OUT; /* Until we get a request */ r->the_request = NULL; Eugene -- "Люди забыли эту истину," - сказал Лис, - "но ты не забывай"

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