monero/external/miniupnpc/minihttptestserver.c
2014-04-09 13:14:35 +01:00

486 lines
11 KiB
C
Executable file

/* $Id: minihttptestserver.c,v 1.13 2012/05/29 13:03:07 nanard Exp $ */
/* Project : miniUPnP
* Author : Thomas Bernard
* Copyright (c) 2011-2012 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>
#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)
{
printf("handle_signal_chld(%d)\n", sig);
++child_to_wait_for;
}
/**
* signal handler for SIGINT (CRTL C)
*/
#if 0
void handle_signal_int(int sig)
{
printf("handle_signal_int(%d)\n", sig);
quit = 1;
}
#endif
/**
* 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);
*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);
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;
}
enum modes { MODE_INVALID, MODE_CHUNKED, MODE_ADDCRAP, MODE_NORMAL };
const struct {
const enum modes mode;
const char * text;
} modes_array[] = {
{MODE_CHUNKED, "chunked"},
{MODE_ADDCRAP, "addcrap"},
{MODE_NORMAL, "normal"},
{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) {
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 */
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);
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;
response_buffer = realloc(response_buffer, response_len);
build_content(response_buffer + n, content_length);
build_crap(response_buffer + n + content_length, CRAP_LENGTH);
break;
default:
response_len = content_length+256;
response_buffer = malloc(response_len);
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;
response_buffer = realloc(response_buffer, response_len);
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;
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));
signal(SIGCHLD, handle_signal_chld);
#if 0
signal(SIGINT, handle_signal_int);
#endif
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);
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", pid, status);
}
--child_to_wait_for;
}
/* TODO : add a select() call in order to handle the case
* when a signal is caught */
client_addrlen = sizeof(struct sockaddr_storage);
c = accept(s, (struct sockaddr *)&client_addr,
&client_addrlen);
if(c < 0) {
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", pid, status);
}
--child_to_wait_for;
}
printf("Bye...\n");
}
return 0;
}