660 lines
15 KiB
C
660 lines
15 KiB
C
/* $Id: minihttptestserver.c,v 1.19 2015/11/17 09:07:17 nanard Exp $ */
|
|
/* Project : miniUPnP
|
|
* Author : Thomas Bernard
|
|
* Copyright (c) 2011-2016 Thomas Bernard
|
|
* This software is subject to the conditions detailed in the
|
|
* LICENCE file provided in this distribution.
|
|
* */
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/wait.h>
|
|
#include <arpa/inet.h>
|
|
#include <netinet/in.h>
|
|
#include <signal.h>
|
|
#include <time.h>
|
|
#include <errno.h>
|
|
|
|
#ifndef INADDR_LOOPBACK
|
|
#define INADDR_LOOPBACK 0x7f000001
|
|
#endif
|
|
|
|
#define CRAP_LENGTH (2048)
|
|
|
|
volatile sig_atomic_t quit = 0;
|
|
volatile sig_atomic_t child_to_wait_for = 0;
|
|
|
|
/**
|
|
* signal handler for SIGCHLD (child status has changed)
|
|
*/
|
|
void handle_signal_chld(int sig)
|
|
{
|
|
(void)sig;
|
|
/* printf("handle_signal_chld(%d)\n", sig); */
|
|
++child_to_wait_for;
|
|
}
|
|
|
|
/**
|
|
* signal handler for SIGINT (CRTL C)
|
|
*/
|
|
void handle_signal_int(int sig)
|
|
{
|
|
(void)sig;
|
|
/* printf("handle_signal_int(%d)\n", sig); */
|
|
quit = 1;
|
|
}
|
|
|
|
/**
|
|
* build a text/plain content of the specified length
|
|
*/
|
|
void build_content(char * p, int n)
|
|
{
|
|
char line_buffer[80];
|
|
int k;
|
|
int i = 0;
|
|
|
|
while(n > 0) {
|
|
k = snprintf(line_buffer, sizeof(line_buffer),
|
|
"%04d_ABCDEFGHIJKL_This_line_is_64_bytes_long_ABCDEFGHIJKL_%04d\r\n",
|
|
i, i);
|
|
if(k != 64) {
|
|
fprintf(stderr, "snprintf() returned %d in build_content()\n", k);
|
|
}
|
|
++i;
|
|
if(n >= 64) {
|
|
memcpy(p, line_buffer, 64);
|
|
p += 64;
|
|
n -= 64;
|
|
} else {
|
|
memcpy(p, line_buffer, n);
|
|
p += n;
|
|
n = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* build crappy content
|
|
*/
|
|
void build_crap(char * p, int n)
|
|
{
|
|
static const char crap[] = "_CRAP_\r\n";
|
|
int i;
|
|
|
|
while(n > 0) {
|
|
i = sizeof(crap) - 1;
|
|
if(i > n)
|
|
i = n;
|
|
memcpy(p, crap, i);
|
|
p += i;
|
|
n -= i;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* build chunked response.
|
|
* return a malloc'ed buffer
|
|
*/
|
|
char * build_chunked_response(int content_length, int * response_len)
|
|
{
|
|
char * response_buffer;
|
|
char * content_buffer;
|
|
int buffer_length;
|
|
int i, n;
|
|
|
|
/* allocate to have some margin */
|
|
buffer_length = 256 + content_length + (content_length >> 4);
|
|
response_buffer = malloc(buffer_length);
|
|
if(response_buffer == NULL)
|
|
return NULL;
|
|
*response_len = snprintf(response_buffer, buffer_length,
|
|
"HTTP/1.1 200 OK\r\n"
|
|
"Content-Type: text/plain\r\n"
|
|
"Transfer-Encoding: chunked\r\n"
|
|
"\r\n");
|
|
|
|
/* build the content */
|
|
content_buffer = malloc(content_length);
|
|
if(content_buffer == NULL) {
|
|
free(response_buffer);
|
|
return NULL;
|
|
}
|
|
build_content(content_buffer, content_length);
|
|
|
|
/* chunk it */
|
|
i = 0;
|
|
while(i < content_length) {
|
|
n = (rand() % 199) + 1;
|
|
if(i + n > content_length) {
|
|
n = content_length - i;
|
|
}
|
|
/* TODO : check buffer size ! */
|
|
*response_len += snprintf(response_buffer + *response_len,
|
|
buffer_length - *response_len,
|
|
"%x\r\n", n);
|
|
memcpy(response_buffer + *response_len, content_buffer + i, n);
|
|
*response_len += n;
|
|
i += n;
|
|
response_buffer[(*response_len)++] = '\r';
|
|
response_buffer[(*response_len)++] = '\n';
|
|
}
|
|
/* the last chunk : "0\r\n" a empty body and then
|
|
* the final "\r\n" */
|
|
memcpy(response_buffer + *response_len, "0\r\n\r\n", 5);
|
|
*response_len += 5;
|
|
free(content_buffer);
|
|
|
|
printf("resp_length=%d buffer_length=%d content_length=%d\n",
|
|
*response_len, buffer_length, content_length);
|
|
return response_buffer;
|
|
}
|
|
|
|
/* favicon.ico generator */
|
|
#ifdef OLD_HEADER
|
|
#define FAVICON_LENGTH (6 + 16 + 12 + 8 + 32 * 4)
|
|
#else
|
|
#define FAVICON_LENGTH (6 + 16 + 40 + 8 + 32 * 4)
|
|
#endif
|
|
void build_favicon_content(char * p, int n)
|
|
{
|
|
int i;
|
|
if(n < FAVICON_LENGTH)
|
|
return;
|
|
/* header : 6 bytes */
|
|
*p++ = 0;
|
|
*p++ = 0;
|
|
*p++ = 1; /* type : ICO */
|
|
*p++ = 0;
|
|
*p++ = 1; /* number of images in file */
|
|
*p++ = 0;
|
|
/* image directory (1 entry) : 16 bytes */
|
|
*p++ = 16; /* width */
|
|
*p++ = 16; /* height */
|
|
*p++ = 2; /* number of colors in the palette. 0 = no palette */
|
|
*p++ = 0; /* reserved */
|
|
*p++ = 1; /* color planes */
|
|
*p++ = 0; /* " */
|
|
*p++ = 1; /* bpp */
|
|
*p++ = 0; /* " */
|
|
#ifdef OLD_HEADER
|
|
*p++ = 12 + 8 + 32 * 4; /* bmp size */
|
|
#else
|
|
*p++ = 40 + 8 + 32 * 4; /* bmp size */
|
|
#endif
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 6 + 16; /* bmp offset */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
/* BMP */
|
|
#ifdef OLD_HEADER
|
|
/* BITMAPCOREHEADER */
|
|
*p++ = 12; /* size of this header */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 16; /* width */
|
|
*p++ = 0; /* " */
|
|
*p++ = 16 * 2; /* height x 2 ! */
|
|
*p++ = 0; /* " */
|
|
*p++ = 1; /* color planes */
|
|
*p++ = 0; /* " */
|
|
*p++ = 1; /* bpp */
|
|
*p++ = 0; /* " */
|
|
#else
|
|
/* BITMAPINFOHEADER */
|
|
*p++ = 40; /* size of this header */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 16; /* width */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 16 * 2; /* height x 2 ! */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 0; /* " */
|
|
*p++ = 1; /* color planes */
|
|
*p++ = 0; /* " */
|
|
*p++ = 1; /* bpp */
|
|
*p++ = 0; /* " */
|
|
/* compression method, image size, ppm x, ppm y */
|
|
/* colors in the palette ? */
|
|
/* important colors */
|
|
for(i = 4 * 6; i > 0; --i)
|
|
*p++ = 0;
|
|
#endif
|
|
/* palette */
|
|
*p++ = 0; /* b */
|
|
*p++ = 0; /* g */
|
|
*p++ = 0; /* r */
|
|
*p++ = 0; /* reserved */
|
|
*p++ = 255; /* b */
|
|
*p++ = 255; /* g */
|
|
*p++ = 255; /* r */
|
|
*p++ = 0; /* reserved */
|
|
/* pixel data */
|
|
for(i = 16; i > 0; --i) {
|
|
if(i & 1) {
|
|
*p++ = 0125;
|
|
*p++ = 0125;
|
|
} else {
|
|
*p++ = 0252;
|
|
*p++ = 0252;
|
|
}
|
|
*p++ = 0;
|
|
*p++ = 0;
|
|
}
|
|
/* Opacity MASK */
|
|
for(i = 16 * 4; i > 0; --i) {
|
|
*p++ = 0;
|
|
}
|
|
}
|
|
|
|
enum modes {
|
|
MODE_INVALID, MODE_CHUNKED, MODE_ADDCRAP, MODE_NORMAL, MODE_FAVICON
|
|
};
|
|
|
|
const struct {
|
|
const enum modes mode;
|
|
const char * text;
|
|
} modes_array[] = {
|
|
{MODE_CHUNKED, "chunked"},
|
|
{MODE_ADDCRAP, "addcrap"},
|
|
{MODE_NORMAL, "normal"},
|
|
{MODE_FAVICON, "favicon.ico"},
|
|
{MODE_INVALID, NULL}
|
|
};
|
|
|
|
/**
|
|
* write the response with random behaviour !
|
|
*/
|
|
void send_response(int c, const char * buffer, int len)
|
|
{
|
|
int n;
|
|
while(len > 0) {
|
|
n = (rand() % 99) + 1;
|
|
if(n > len)
|
|
n = len;
|
|
n = write(c, buffer, n);
|
|
if(n < 0) {
|
|
if(errno != EINTR) {
|
|
perror("write");
|
|
return;
|
|
}
|
|
/* if errno == EINTR, try again */
|
|
} else {
|
|
len -= n;
|
|
buffer += n;
|
|
}
|
|
usleep(10000); /* 10ms */
|
|
}
|
|
}
|
|
|
|
/**
|
|
* handle the HTTP connection
|
|
*/
|
|
void handle_http_connection(int c)
|
|
{
|
|
char request_buffer[2048];
|
|
int request_len = 0;
|
|
int headers_found = 0;
|
|
int n, i;
|
|
char request_method[16];
|
|
char request_uri[256];
|
|
char http_version[16];
|
|
char * p;
|
|
char * response_buffer;
|
|
int response_len;
|
|
enum modes mode;
|
|
int content_length = 16*1024;
|
|
|
|
/* read the request */
|
|
while(request_len < (int)sizeof(request_buffer) && !headers_found) {
|
|
n = read(c,
|
|
request_buffer + request_len,
|
|
sizeof(request_buffer) - request_len);
|
|
if(n < 0) {
|
|
if(errno == EINTR)
|
|
continue;
|
|
perror("read");
|
|
return;
|
|
} else if(n==0) {
|
|
/* remote host closed the connection */
|
|
break;
|
|
} else {
|
|
request_len += n;
|
|
for(i = 0; i < request_len - 3; i++) {
|
|
if(0 == memcmp(request_buffer + i, "\r\n\r\n", 4)) {
|
|
/* found the end of headers */
|
|
headers_found = 1;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if(!headers_found) {
|
|
/* error */
|
|
printf("no HTTP header found in the request\n");
|
|
return;
|
|
}
|
|
printf("headers :\n%.*s", request_len, request_buffer);
|
|
/* the request have been received, now parse the request line */
|
|
p = request_buffer;
|
|
for(i = 0; i < (int)sizeof(request_method) - 1; i++) {
|
|
if(*p == ' ' || *p == '\r')
|
|
break;
|
|
request_method[i] = *p;
|
|
++p;
|
|
}
|
|
request_method[i] = '\0';
|
|
while(*p == ' ')
|
|
p++;
|
|
for(i = 0; i < (int)sizeof(request_uri) - 1; i++) {
|
|
if(*p == ' ' || *p == '\r')
|
|
break;
|
|
request_uri[i] = *p;
|
|
++p;
|
|
}
|
|
request_uri[i] = '\0';
|
|
while(*p == ' ')
|
|
p++;
|
|
for(i = 0; i < (int)sizeof(http_version) - 1; i++) {
|
|
if(*p == ' ' || *p == '\r')
|
|
break;
|
|
http_version[i] = *p;
|
|
++p;
|
|
}
|
|
http_version[i] = '\0';
|
|
printf("Method = %s, URI = %s, %s\n",
|
|
request_method, request_uri, http_version);
|
|
/* check if the request method is allowed */
|
|
if(0 != strcmp(request_method, "GET")) {
|
|
const char response405[] = "HTTP/1.1 405 Method Not Allowed\r\n"
|
|
"Allow: GET\r\n\r\n";
|
|
const char * pc;
|
|
/* 405 Method Not Allowed */
|
|
/* The response MUST include an Allow header containing a list
|
|
* of valid methods for the requested resource. */
|
|
n = sizeof(response405) - 1;
|
|
pc = response405;
|
|
while(n > 0) {
|
|
i = write(c, pc, n);
|
|
if(i<0) {
|
|
if(errno != EINTR) {
|
|
perror("write");
|
|
return;
|
|
}
|
|
} else {
|
|
n -= i;
|
|
pc += i;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
mode = MODE_INVALID;
|
|
/* use the request URI to know what to do */
|
|
for(i = 0; modes_array[i].mode != MODE_INVALID; i++) {
|
|
if(strstr(request_uri, modes_array[i].text)) {
|
|
mode = modes_array[i].mode; /* found */
|
|
break;
|
|
}
|
|
}
|
|
|
|
switch(mode) {
|
|
case MODE_CHUNKED:
|
|
response_buffer = build_chunked_response(content_length, &response_len);
|
|
break;
|
|
case MODE_ADDCRAP:
|
|
response_len = content_length+256;
|
|
response_buffer = malloc(response_len);
|
|
if(!response_buffer)
|
|
break;
|
|
n = snprintf(response_buffer, response_len,
|
|
"HTTP/1.1 200 OK\r\n"
|
|
"Server: minihttptestserver\r\n"
|
|
"Content-Type: text/plain\r\n"
|
|
"Content-Length: %d\r\n"
|
|
"\r\n", content_length);
|
|
response_len = content_length+n+CRAP_LENGTH;
|
|
p = realloc(response_buffer, response_len);
|
|
if(p == NULL) {
|
|
/* error 500 */
|
|
free(response_buffer);
|
|
response_buffer = NULL;
|
|
break;
|
|
}
|
|
response_buffer = p;
|
|
build_content(response_buffer + n, content_length);
|
|
build_crap(response_buffer + n + content_length, CRAP_LENGTH);
|
|
break;
|
|
case MODE_FAVICON:
|
|
content_length = FAVICON_LENGTH;
|
|
response_len = content_length + 256;
|
|
response_buffer = malloc(response_len);
|
|
if(!response_buffer)
|
|
break;
|
|
n = snprintf(response_buffer, response_len,
|
|
"HTTP/1.1 200 OK\r\n"
|
|
"Server: minihttptestserver\r\n"
|
|
"Content-Type: image/vnd.microsoft.icon\r\n"
|
|
"Content-Length: %d\r\n"
|
|
"\r\n", content_length);
|
|
/* image/x-icon */
|
|
build_favicon_content(response_buffer + n, content_length);
|
|
response_len = content_length + n;
|
|
break;
|
|
default:
|
|
response_len = content_length+256;
|
|
response_buffer = malloc(response_len);
|
|
if(!response_buffer)
|
|
break;
|
|
n = snprintf(response_buffer, response_len,
|
|
"HTTP/1.1 200 OK\r\n"
|
|
"Server: minihttptestserver\r\n"
|
|
"Content-Type: text/plain\r\n"
|
|
"\r\n");
|
|
response_len = content_length+n;
|
|
p = realloc(response_buffer, response_len);
|
|
if(p == NULL) {
|
|
/* Error 500 */
|
|
free(response_buffer);
|
|
response_buffer = NULL;
|
|
break;
|
|
}
|
|
response_buffer = p;
|
|
build_content(response_buffer + n, response_len - n);
|
|
}
|
|
|
|
if(response_buffer) {
|
|
send_response(c, response_buffer, response_len);
|
|
free(response_buffer);
|
|
} else {
|
|
/* Error 500 */
|
|
}
|
|
}
|
|
|
|
/**
|
|
*/
|
|
int main(int argc, char * * argv) {
|
|
int ipv6 = 0;
|
|
int s, c, i;
|
|
unsigned short port = 0;
|
|
struct sockaddr_storage server_addr;
|
|
socklen_t server_addrlen;
|
|
struct sockaddr_storage client_addr;
|
|
socklen_t client_addrlen;
|
|
pid_t pid;
|
|
int child = 0;
|
|
int status;
|
|
const char * expected_file_name = NULL;
|
|
struct sigaction sa;
|
|
|
|
for(i = 1; i < argc; i++) {
|
|
if(argv[i][0] == '-') {
|
|
switch(argv[i][1]) {
|
|
case '6':
|
|
ipv6 = 1;
|
|
break;
|
|
case 'e':
|
|
/* write expected file ! */
|
|
expected_file_name = argv[++i];
|
|
break;
|
|
case 'p':
|
|
/* port */
|
|
if(++i < argc) {
|
|
port = (unsigned short)atoi(argv[i]);
|
|
}
|
|
break;
|
|
default:
|
|
fprintf(stderr, "unknown command line switch '%s'\n", argv[i]);
|
|
}
|
|
} else {
|
|
fprintf(stderr, "unkown command line argument '%s'\n", argv[i]);
|
|
}
|
|
}
|
|
|
|
srand(time(NULL));
|
|
|
|
memset(&sa, 0, sizeof(struct sigaction));
|
|
|
|
/*signal(SIGCHLD, handle_signal_chld);*/
|
|
sa.sa_handler = handle_signal_chld;
|
|
if(sigaction(SIGCHLD, &sa, NULL) < 0) {
|
|
perror("sigaction");
|
|
return 1;
|
|
}
|
|
/*signal(SIGINT, handle_signal_int);*/
|
|
sa.sa_handler = handle_signal_int;
|
|
if(sigaction(SIGINT, &sa, NULL) < 0) {
|
|
perror("sigaction");
|
|
return 1;
|
|
}
|
|
|
|
s = socket(ipv6 ? AF_INET6 : AF_INET, SOCK_STREAM, 0);
|
|
if(s < 0) {
|
|
perror("socket");
|
|
return 1;
|
|
}
|
|
memset(&server_addr, 0, sizeof(struct sockaddr_storage));
|
|
memset(&client_addr, 0, sizeof(struct sockaddr_storage));
|
|
if(ipv6) {
|
|
struct sockaddr_in6 * addr = (struct sockaddr_in6 *)&server_addr;
|
|
addr->sin6_family = AF_INET6;
|
|
addr->sin6_port = htons(port);
|
|
addr->sin6_addr = in6addr_loopback;
|
|
} else {
|
|
struct sockaddr_in * addr = (struct sockaddr_in *)&server_addr;
|
|
addr->sin_family = AF_INET;
|
|
addr->sin_port = htons(port);
|
|
addr->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
|
|
}
|
|
if(bind(s, (struct sockaddr *)&server_addr,
|
|
ipv6 ? sizeof(struct sockaddr_in6) : sizeof(struct sockaddr_in)) < 0) {
|
|
perror("bind");
|
|
return 1;
|
|
}
|
|
if(listen(s, 5) < 0) {
|
|
perror("listen");
|
|
}
|
|
if(port == 0) {
|
|
server_addrlen = sizeof(struct sockaddr_storage);
|
|
if(getsockname(s, (struct sockaddr *)&server_addr, &server_addrlen) < 0) {
|
|
perror("getsockname");
|
|
return 1;
|
|
}
|
|
if(ipv6) {
|
|
struct sockaddr_in6 * addr = (struct sockaddr_in6 *)&server_addr;
|
|
port = ntohs(addr->sin6_port);
|
|
} else {
|
|
struct sockaddr_in * addr = (struct sockaddr_in *)&server_addr;
|
|
port = ntohs(addr->sin_port);
|
|
}
|
|
printf("Listening on port %hu\n", port);
|
|
fflush(stdout);
|
|
}
|
|
|
|
/* write expected file */
|
|
if(expected_file_name) {
|
|
FILE * f;
|
|
f = fopen(expected_file_name, "wb");
|
|
if(f) {
|
|
char * buffer;
|
|
buffer = malloc(16*1024);
|
|
if(buffer == NULL) {
|
|
fprintf(stderr, "memory allocation error\n");
|
|
} else {
|
|
build_content(buffer, 16*1024);
|
|
i = fwrite(buffer, 1, 16*1024, f);
|
|
if(i != 16*1024) {
|
|
fprintf(stderr, "error writing to file %s : %dbytes written (out of %d)\n", expected_file_name, i, 16*1024);
|
|
}
|
|
free(buffer);
|
|
}
|
|
fclose(f);
|
|
} else {
|
|
fprintf(stderr, "error opening file %s for writing\n", expected_file_name);
|
|
}
|
|
}
|
|
|
|
/* fork() loop */
|
|
while(!child && !quit) {
|
|
while(child_to_wait_for > 0) {
|
|
pid = wait(&status);
|
|
if(pid < 0) {
|
|
perror("wait");
|
|
} else {
|
|
printf("child(%d) terminated with status %d\n", (int)pid, status);
|
|
}
|
|
--child_to_wait_for;
|
|
}
|
|
client_addrlen = sizeof(struct sockaddr_storage);
|
|
c = accept(s, (struct sockaddr *)&client_addr,
|
|
&client_addrlen);
|
|
if(c < 0) {
|
|
if(errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)
|
|
continue;
|
|
perror("accept");
|
|
return 1;
|
|
}
|
|
printf("accept...\n");
|
|
pid = fork();
|
|
if(pid < 0) {
|
|
perror("fork");
|
|
return 1;
|
|
} else if(pid == 0) {
|
|
/* child */
|
|
child = 1;
|
|
close(s);
|
|
s = -1;
|
|
handle_http_connection(c);
|
|
}
|
|
close(c);
|
|
}
|
|
if(s >= 0) {
|
|
close(s);
|
|
s = -1;
|
|
}
|
|
if(!child) {
|
|
while(child_to_wait_for > 0) {
|
|
pid = wait(&status);
|
|
if(pid < 0) {
|
|
perror("wait");
|
|
} else {
|
|
printf("child(%d) terminated with status %d\n", (int)pid, status);
|
|
}
|
|
--child_to_wait_for;
|
|
}
|
|
printf("Bye...\n");
|
|
}
|
|
return 0;
|
|
}
|
|
|