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login.c
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login.c
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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/prctl.h>
#include <fcntl.h>
#include <pthread.h>
#include <syslog.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <ctype.h>
#include <errno.h>
#define _GNU_SOURCE
#define LOGIN_SIZE_1024 1024
#define LOGIN_LOG_INTERVAL 300
unsigned long g_login_success_num = 0;
unsigned long g_login_fail_num = 0;
unsigned long g_login_error[20] = {0};
char *g_login_success_reply = "HTTP/1.1 200 OK\r\n"
"Server: www.introbao.com:8000\r\n"
"Cache-Control: no-cache\r\n"
"Content-Type: text/html\r\n"
"Content-Length: 7\r\n"
"Connection: close\r\n"
"\r\n"
"success";
char *g_login_fail_reply = "HTTP/1.1 200 OK\r\n"
"Server: www.introbao.com:8000\r\n"
"Cache-Control: no-cache\r\n"
"Content-Type: text/html\r\n"
"Content-Length: 4\r\n"
"Connection: close\r\n"
"\r\n"
"fail";
void reply(int sock, char *post) {
int ret;
char *body;
struct sockaddr_in addr;
socklen_t addrlen = sizeof(addr);
(void)getpeername(sock, (struct sockaddr *)&addr, &addrlen);
body = strstr(post, "\r\n\r\n");
if (NULL == body) {
(void)__sync_fetch_and_add(&g_login_error[4], 1);
syslog(LOG_ERR, "do not receive http body\n");
goto fail;
}
if (NULL == strstr(body, "user=admin")) {
(void)__sync_fetch_and_add(&g_login_error[5], 1);
syslog(LOG_ERR, "user error\n");
goto fail;
}
if (NULL == strstr(body, "passwd=introbao")) {
(void)__sync_fetch_and_add(&g_login_error[6], 1);
syslog(LOG_ERR, "passwd error\n");
goto fail;
}
if (NULL == strstr(body, "groupid=")) {
(void)__sync_fetch_and_add(&g_login_error[7], 1);
syslog(LOG_ERR, "groupid error\n");
goto fail;
}
(void)__sync_fetch_and_add(&g_login_success_num, 1);
ret = send(sock, g_login_success_reply, strlen(g_login_success_reply), 0);
if (ret < 0) {
(void)__sync_fetch_and_add(&g_login_error[8], 1);
syslog(LOG_ERR, "send error, %s\n", strerror(errno));
}
syslog(LOG_NOTICE, "ip: %s, port: %d, login success\n", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
return;
fail:
(void)__sync_fetch_and_add(&g_login_fail_num, 1);
ret = send(sock, g_login_fail_reply, strlen(g_login_fail_reply), 0);
if (ret < 0) {
(void)__sync_fetch_and_add(&g_login_error[9], 1);
syslog(LOG_ERR, "send error, %s\n", strerror(errno));
}
syslog(LOG_NOTICE, "ip: %s, port: %d, login fail\n", inet_ntoa(addr.sin_addr), ntohs(addr.sin_port));
return;
}
void *thread_login(void *arg) {
char recv_buf[LOGIN_SIZE_1024] = {0};
int recvd;
int recv_sock = (int)(long)arg;
struct timeval timeout = {7, 0};
(void)prctl(PR_SET_NAME, "login_recv");
(void)setsockopt(recv_sock, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout));
while (1) {
recvd = recv(recv_sock, recv_buf, LOGIN_SIZE_1024, 0);
if (0 == recvd) {
(void)__sync_fetch_and_add(&g_login_error[1], 1);
syslog(LOG_ERR, "recv zero, %s\n", strerror(errno));
break;
} else if (recvd < 0) {
if ((EAGAIN == errno) || (EINTR == errno) || (EWOULDBLOCK == errno)) {
(void)__sync_fetch_and_add(&g_login_error[2], 1);
syslog(LOG_ERR, "recv eagain, %s\n", strerror(errno));
(void)sleep(2);
continue;
} else {
(void)__sync_fetch_and_add(&g_login_error[3], 1);
syslog(LOG_ERR, "recv error, %s\n", strerror(errno));
break;
}
}
reply(recv_sock, recv_buf);
}
close(recv_sock);
return NULL;
}
void *thread_syslog(void *arg) {
time_t cur_s, last_log = 0;
(void)arg;
(void)prctl(PR_SET_NAME, "login_syslog");
while (1) {
(void)sleep(1);
cur_s = time(NULL);
if (cur_s - last_log > LOGIN_LOG_INTERVAL) {
last_log = cur_s - cur_s % LOGIN_LOG_INTERVAL;
syslog(LOG_NOTICE, "[RUN] login success: %lu, login fail: %lu, error: %lu/%lu/%lu/%lu/%lu/%lu/%lu/%lu/%lu/%lu\n",
g_login_success_num, g_login_fail_num, g_login_error[0], g_login_error[1], g_login_error[2], g_login_error[3],
g_login_error[4], g_login_error[5], g_login_error[6], g_login_error[7], g_login_error[8], g_login_error[9]);
}
}
}
int main(int argc, char *argv[]) {
int sock_fd;
int listen_fd;
int optval = 0;
pthread_t id;
pthread_attr_t attr;
struct sockaddr_in addr;
struct sigaction sa = {.sa_handler = SIG_IGN,};
(void)sigaction(SIGPIPE, &sa, 0);
(void)pthread_attr_init(&attr);
(void)pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
listen_fd = socket(AF_INET, SOCK_STREAM, 0);
(void)setsockopt(listen_fd, SOL_SOCKET, SO_REUSEADDR, (char *)&optval, sizeof(optval));
addr.sin_family = AF_INET;
addr.sin_port = htons(8000);
addr.sin_addr.s_addr = htonl(INADDR_ANY);
if (bind(listen_fd, (struct sockaddr *)(void *)&addr, sizeof(struct sockaddr_in)) < 0) {
syslog(LOG_ERR, "bind error, %s\n", strerror(errno));
return -1;
}
if (listen(listen_fd , 0) < 0) {
syslog(LOG_ERR, "listen error, %s\n", strerror(errno));
return -1;
}
(void)pthread_create(&id, NULL, thread_syslog, NULL);
syslog(LOG_INFO, "interpreter login start\n");
while (1) {
sock_fd = accept(listen_fd, NULL, NULL);
if (sock_fd < 0) {
g_login_error[0]++;
continue;
}
(void)pthread_create(&id, &attr, thread_login, (void *)(long)sock_fd);
}
}