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|
/*
* Copyright (c) 2017-2024 OARC, Inc.
* Copyright (c) 2011-2017, IIS - The Internet Foundation in Sweden
* All rights reserved.
*
* This file is part of PacketQ.
*
* PacketQ is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* PacketQ is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with PacketQ. If not, see <http://www.gnu.org/licenses/>.
*/
#include "packetq.h"
#include "pcap.h"
#include "reader.h"
#include <arpa/inet.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <list>
#include <map>
#include <netdb.h>
#include <netinet/in.h>
#include <poll.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#define MAXHOSTNAME 256
namespace packetq {
namespace httpd {
class Socket;
class Server;
static char redirect[] = "HTTP/1.1 307 Temporary Redirect\r\n"
"Location: /\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n<html><head><title>moved</title></head><body><h1>moved</h1>this page has moved to /</body></html>";
static char header[] = "HTTP/1.1 200 OK\r\n"
"Server: PacketQ builtin\r\n"
"Connection: close\r\n"
"Access-Control-Allow-Origin: *\r\n"
"Content-Type: %s\r\n"
"\r\n";
static Server* g_server = 0;
class SocketPool {
public:
SocketPool()
{
m_free = 0;
for (int i = 0; i < FD_SETSIZE; i++) {
m_sockets[i] = 0;
}
m_socket_count = 0;
}
int add(Socket* s)
{
if (m_free < FD_SETSIZE)
m_sockets[m_free] = s;
else
return -1;
int idx = m_free;
while (m_free < FD_SETSIZE && m_sockets[m_free])
m_free++;
m_socket_count++;
return idx;
}
void remove(int s)
{
m_sockets[s] = 0;
if (s < m_free)
m_free = s;
m_socket_count--;
}
int get_sockets() { return m_socket_count; }
void select();
fd_set m_readset;
fd_set m_writeset;
int m_free;
int m_socket_count;
Socket* m_sockets[FD_SETSIZE];
};
SocketPool g_pool;
class Stream {
public:
class Buffer {
private:
Buffer& operator=(const Buffer& other);
Buffer const& operator=(Buffer&& other);
public:
Buffer(const unsigned char* buf, int len)
{
m_buf = new unsigned char[len];
memcpy(m_buf, buf, len);
m_len = len;
m_pos = 0;
}
Buffer(Buffer&& other) noexcept
{
m_buf = other.m_buf;
m_len = other.m_len;
m_pos = other.m_pos;
other.m_buf = 0;
other.m_len = 0;
other.m_pos = 0;
}
~Buffer()
{
m_len = 0;
delete[] m_buf;
}
unsigned char* m_buf;
int m_len;
int m_pos;
};
Stream()
{
m_len = 0;
}
void push_front(unsigned char* data, int len)
{
m_stream.push_front(Buffer(data, len));
m_len += len;
}
void write(unsigned char* data, int len)
{
m_stream.push_back(Buffer(data, len));
m_len += len;
}
int read(unsigned char* data, int maxlen)
{
int p = 0;
while (p < maxlen && m_len > 0) {
Buffer& buf = m_stream.front();
int l = maxlen - p;
if (l > buf.m_len - buf.m_pos)
l = buf.m_len - buf.m_pos;
for (int i = 0; i < l; i++) {
data[p++] = buf.m_buf[buf.m_pos++];
}
m_len -= l;
if (l == 0) {
m_stream.pop_front();
}
}
return p;
}
int len()
{
return m_len;
}
int get()
{
unsigned char c = '@';
int r = read(&c, 1);
if (r == 0)
return -1;
return c;
}
private:
int m_len;
std::list<Stream::Buffer> m_stream;
};
class Socket {
private:
Socket& operator=(const Socket& other);
Socket(Socket&& other) noexcept;
Socket const& operator=(Socket&& other);
public:
Socket(int s, bool serv)
: m_want_write(false)
{
int flags;
// Add non-blocking flag
if ((flags = fcntl(s, F_GETFL)) == -1) {
syslog(LOG_ERR | LOG_USER, "fcntl(%d, F_GETFL) failed: %d\n", s, errno);
exit(-1);
}
if (fcntl(s, F_SETFL, flags | O_NONBLOCK)) {
syslog(LOG_ERR | LOG_USER, "fcntl(%d, F_SETFL, 0x%x) failed: %d\n", s, errno, flags | O_NONBLOCK);
exit(-1);
}
m_bytes_written = 0;
m_bytes_read = 0;
m_serv = serv;
m_socket = s;
m_sidx = g_pool.add(this);
m_close_when_empty = false;
m_file = 0;
}
virtual ~Socket()
{
g_pool.remove(m_sidx);
close(m_socket);
}
void process(bool read)
{
// m_serv means this is a listening socket
if (m_serv)
return;
if (!read) {
on_write();
unsigned char ptr[4096];
int len;
while ((len = m_write.read(ptr, sizeof(ptr)))) {
int res = write(m_socket, ptr, len);
#if EAGAIN != EWOULDBLOCK
if (res == -1 && (errno == EAGAIN || errno == EWOULDBLOCK)) {
#else
if (res == -1 && (errno == EAGAIN)) {
#endif
m_write.push_front(ptr, len);
set_want_write();
return;
}
if (res < 0) {
delete this;
return;
}
m_bytes_written += res;
if (res < len) {
m_write.push_front(&ptr[res], len - res);
set_want_write();
return;
}
}
if (m_close_when_empty) {
shutdown(m_socket, SHUT_WR);
// fflush(m_socket);
delete this;
}
}
if (read) {
int avail = read_sock();
if (avail)
on_read();
}
}
virtual void file_write()
{
}
virtual void file_read()
{
}
void set_delete()
{
m_close_when_empty = true;
m_want_write = false;
}
virtual void on_write()
{
}
virtual void on_read()
{
}
int read_sock()
{
unsigned char buf[2000];
int len = 0;
if ((len = recv(m_socket, buf, sizeof(buf) - 1, 0)) > 0) {
m_bytes_read += len;
buf[len] = 0;
m_read.write(buf, len);
}
if (len < 0) {
delete this;
return 0;
}
return len;
}
bool failed()
{
return m_sidx == -1;
}
bool has_data()
{
return m_want_write || m_write.len() > 0;
}
void set_want_write(bool set = true)
{
m_want_write = set;
}
int m_bytes_written;
int m_bytes_read;
int m_socket;
int m_file;
int m_sidx;
bool m_serv;
bool m_want_write;
bool m_close_when_empty;
char m_buffer[4096];
Stream m_read, m_write;
};
void SocketPool::select()
{
FD_ZERO(&m_readset);
FD_ZERO(&m_writeset);
int max = 0;
for (int i = 0; i < FD_SETSIZE; i++) {
if (m_sockets[i]) {
if (max < m_sockets[i]->m_socket)
max = m_sockets[i]->m_socket;
FD_SET(m_sockets[i]->m_socket, &m_readset);
if (m_sockets[i]->has_data())
FD_SET(m_sockets[i]->m_socket, &m_writeset);
if (max < m_sockets[i]->m_file)
max = m_sockets[i]->m_file;
FD_SET(m_sockets[i]->m_file, &m_readset);
}
}
timeval timeout;
timeout.tv_sec = 30;
timeout.tv_usec = 0;
int sel = ::select(max + 1, &m_readset, &m_writeset, 0, &timeout);
if (sel < 0) {
syslog(LOG_ERR | LOG_USER, "sel -1 errno = %d %s max:%d", errno, strerror(errno), max);
exit(-1);
}
if (sel) {
for (int i = 0; i < FD_SETSIZE; i++) {
if (m_sockets[i] && m_sockets[i]->m_file) {
if (FD_ISSET(m_sockets[i]->m_file, &m_readset)) {
m_sockets[i]->file_read();
}
if (m_sockets[i] && FD_ISSET(m_sockets[i]->m_file, &m_writeset)) {
m_sockets[i]->file_write();
}
}
if (m_sockets[i] && FD_ISSET(m_sockets[i]->m_socket, &m_readset)) {
m_sockets[i]->process(true);
}
if (m_sockets[i] && FD_ISSET(m_sockets[i]->m_socket, &m_writeset)) {
m_sockets[i]->process(false);
}
}
}
}
class Server {
public:
Socket m_socket;
Server(int port, const std::string& pcaproot, const std::string& webroot)
: m_socket(establish(port), true)
, m_pcaproot(pcaproot)
, m_webroot(webroot)
{
if (m_socket.m_socket < 0) {
if (m_socket.m_socket == EADDRINUSE)
syslog(LOG_ERR | LOG_USER, "Fail EADDRINUSE (%d)\n", m_socket.m_socket);
else
syslog(LOG_ERR | LOG_USER, "Fail %d port:%d\n", m_socket.m_socket, port);
exit(-1);
}
}
~Server()
{
}
int get_connection()
{
int s = m_socket.m_socket;
int t; /* socket of connection */
if ((t = accept(s, NULL, NULL)) < 0) /* accept connection if there is one */
return (-1);
return (t);
}
int establish(unsigned short portnum)
{
int s, res;
sockaddr_in sa;
memset(&sa, 0, sizeof(struct sockaddr_in));
sa.sin_family = AF_INET;
sa.sin_addr.s_addr = htonl(INADDR_ANY);
sa.sin_port = htons(portnum);
if ((s = socket(AF_INET, SOCK_STREAM, 0)) < 0)
return (-2);
int on = 1;
res = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on));
if ((res = bind(s, (const sockaddr*)&sa, sizeof(struct sockaddr_in))) < 0) {
close(s);
return (res); /* bind address to socket */
}
// Add non-blocking flag
int flags;
if ((flags = fcntl(s, F_GETFL)) == -1) {
syslog(LOG_ERR | LOG_USER, "fcntl(%d, F_GETFL) failed: %d\n", s, errno);
exit(-1);
}
if (fcntl(s, F_SETFL, flags | O_NONBLOCK)) {
syslog(LOG_ERR | LOG_USER, "fcntl(%d, F_SETFL, 0x%x) failed: %d\n", s, errno, flags | O_NONBLOCK);
exit(-1);
}
listen(s, 511); /* max # of queued connects */
return (s);
}
std::string m_pcaproot;
std::string m_webroot;
};
class Url {
public:
Url(const char* url)
: m_full(url)
{
int i = 0;
for (; i < m_full.length();) {
char c = m_full.c_str()[i];
if (c == '?') {
i++;
break;
}
m_path += c;
i++;
}
m_path = decode(m_path);
if (m_path == "")
m_path = "/";
decode_params(m_full.substr(i).c_str());
}
void decode_params(const char* params)
{
if (!params)
return;
std::string str = params;
for (int i = 0; i < str.length();) {
std::string param = "", value = "";
for (; i < str.length();) {
char c = str.c_str()[i];
if (c == '=' || c == '&') {
i++;
break;
}
param += c;
i++;
}
for (; i < str.length();) {
char c = str.c_str()[i];
if (c == '&') {
i++;
break;
}
value += c;
i++;
}
add_param(decode(param), decode(value));
}
}
const char* get_param(const char* param)
{
auto it = m_params.find(std::string(param));
if (it == m_params.end())
return 0;
return it->second.c_str();
}
void add_param(std::string key, std::string val)
{
auto it = m_params.find(key);
if (it == m_params.end()) {
m_params[key] = val;
m_counts[key] = 1;
return;
}
char cnt[100];
int n = m_counts[key];
m_counts[key] = n + 1;
snprintf(cnt, sizeof(cnt) - 1, "%d", n);
cnt[99] = 0;
std::string keyn = key;
keyn += cnt;
m_params[keyn] = val;
}
std::string decode(std::string str)
{
std::string dst;
int percent_state = 0;
int code = 0;
for (int i = 0; i < str.length(); i++) {
char c = str.c_str()[i];
if (percent_state) {
int n = 0;
if (c >= '0' && c <= '9')
n = c - '0';
if (c >= 'a' && c <= 'f')
n = c - 'a' + 10;
if (c >= 'A' && c <= 'F')
n = c - 'A' + 10;
code = (code << 4) | n;
percent_state--;
if (!percent_state) {
dst += char(code);
code = 0;
}
} else {
if (c == '%') {
percent_state = 2;
} else
dst += c;
}
}
return dst;
}
std::string get_full()
{
return m_full;
}
std::string get_path()
{
return m_path;
}
std::string m_full;
std::string m_path;
std::map<std::string, std::string> m_params;
std::map<std::string, int> m_counts;
};
class Page {
public:
Page(const char* url, const char* body)
: m_url(url)
{
m_url.decode_params(body);
}
void process()
{
if (m_url.get_path().compare("/query") == 0) {
if (!m_url.get_param("file")) {
printf(header, "text/plain");
printf("no file selected\n");
return;
}
printf(header, "text/plain");
if (m_url.get_param("sql"))
query(m_url.get_param("sql"));
else
printf("no query defined \n");
} else if (m_url.get_path().substr(0, 8).compare("/resolve") == 0) {
resolve();
} else if (m_url.get_path().substr(0, 5).compare("/list") == 0) {
serve_dir();
} else {
serve_static();
}
delete g_app;
}
static std::string join_path(const std::string& a, const std::string& b)
{
if (b.find("..") != std::string::npos)
return a;
if (a.length() == 0)
return b;
if (b.length() == 0)
return a;
if (a[a.length() - 1] != '/' && b[0] != '/')
return a + std::string("/") + b;
return a + b;
}
const char* get_mimetype(const std::string& file)
{
int p = file.find_last_of('.');
if (p == std::string::npos || p + 1 >= file.length())
return 0;
std::string suff = file.substr(p + 1);
if (suff.compare("js") == 0)
return "application/x-javascript";
if (suff.compare("jpg") == 0)
return "image/jpeg";
if (suff.compare("html") == 0)
return "text/html";
if (suff.compare("htm") == 0)
return "text/html";
if (suff.compare("txt") == 0)
return "text/plain";
if (suff.compare("png") == 0)
return "image/png";
if (suff.compare("gif") == 0)
return "image/gif";
if (suff.compare("ico") == 0)
return "image/x-icon";
if (suff.compare("json") == 0)
return "application/json";
if (suff.compare("css") == 0)
return "text/css";
return 0;
}
bool serve_file(const std::string& file)
{
const char* mimetype = get_mimetype(file);
if (mimetype) {
FILE* fp = fopen(file.c_str(), "rb");
if (fp) {
printf(header, mimetype);
char buffer[8192];
int len;
while ((len = fread(buffer, 1, 200, fp)) > 0) {
fwrite(buffer, 1, len, stdout);
}
fclose(fp);
return true;
}
}
return false;
}
void serve_static()
{
if (g_server->m_webroot == "") {
printf(header, "text/html");
printf("<h2>This server is not configured to serve static pages</h2>");
printf("Start using the -w option to set a html directory");
return;
}
std::string file = join_path(g_server->m_webroot, m_url.get_path());
if (serve_file(file))
return;
if (serve_file(join_path(file, "index.html")))
return;
if (m_url.get_path().compare("/") != 0) {
printf("%s", redirect);
return;
}
printf(header, "text/html");
printf("<h2>It works !</h2><br>\n");
printf("%s", "<a href=\"/query?file=sample.pcap&sql=select%20qr,qname,protocol%20from%20dns%20limit%2018;\">Test query</a><br/>\n");
printf("%s", "<a href=\"/list\">list available files</a><br/>\n");
}
void resolve()
{
const char* ip = m_url.get_param("ip");
const char* name = m_url.get_param("name");
if (ip) {
printf(header, "application/json");
printf("[");
struct addrinfo* result;
struct addrinfo* res;
int error;
error = getaddrinfo(ip, NULL, NULL, &result);
if (error == 0) {
for (res = result; res != NULL; res = res->ai_next) {
char hostname[NI_MAXHOST] = "";
error = getnameinfo(res->ai_addr, res->ai_addrlen, hostname, NI_MAXHOST, NULL, 0, 0);
if (error != 0) {
continue;
}
if (*hostname != '\0') {
printf("\"%s\"", hostname);
break;
}
}
freeaddrinfo(result);
}
printf("]\n");
} else if (name) {
char tmp[100];
printf(header, "application/json");
printf("[");
struct addrinfo* result;
struct addrinfo* res;
int error;
error = getaddrinfo(name, NULL, NULL, &result);
char empty[] = "", line[] = ",\n";
char* sep = empty;
if (error == 0) {
for (res = result; res != NULL; res = res->ai_next) {
void* ptr = &((struct sockaddr_in*)res->ai_addr)->sin_addr;
if (res->ai_family == AF_INET6)
ptr = &((struct sockaddr_in6*)res->ai_addr)->sin6_addr;
tmp[0] = 0;
inet_ntop(res->ai_family, ptr, tmp, sizeof(tmp));
printf("%s\"%s\"", sep, tmp);
sep = line;
}
freeaddrinfo(result);
}
printf("]\n");
} else
printf("[]\n");
}
void serve_dir()
{
if (g_server->m_pcaproot == "") {
printf(header, "text/html");
printf("<h2>This server is not configured to list pcapfiles</h2>");
printf("Start using the -r option to set a pcap directory");
return;
}
std::string directory = join_path(g_server->m_pcaproot, m_url.get_path().substr(5));
DIR* dir = opendir(directory.c_str());
if (!dir) {
printf("%s", redirect);
return;
}
printf(header, "application/json");
printf("[\n");
struct dirent* d;
struct stat statbuf;
char comma = ' ';
while ((d = readdir(dir)) != 0) {
std::string subject = join_path(directory, d->d_name);
int fd = open(subject.c_str(), O_RDONLY);
if (fd < 0)
continue;
if (fstat(fd, &statbuf) == -1) {
close(fd);
continue;
}
if (S_ISDIR(statbuf.st_mode)) {
if ((strcmp(d->d_name, ".") != 0) && (strcmp(d->d_name, "..") != 0)) {
printf(" %c{\n \"data\" : \"%s\",\n \"attr\" : { \"id\": \"%s\" },\n \"children\" : [], \"state\" : \"closed\" }\n",
comma, d->d_name, join_path(m_url.get_path(), d->d_name).substr(5).c_str());
comma = ',';
}
} else {
bool found = false;
FILE* fp = fdopen(fd, "rb");
if (fp) {
Pcap_file pfile(fp);
if (pfile.get_header()) {
unsigned char* data = 0;
int s = 0, us, len;
data = pfile.get_packet(len, s, us);
if (data) {
printf(" %c{\n \"data\" : \"%s\",\n \"attr\" : { \"id\" : \"%s\", \"size\": %d, \"time\": %d,\"type\": \"pcap\" },\n \"children\" : [] }\n",
comma, d->d_name, join_path(m_url.get_path(), d->d_name).substr(5).c_str(), int(statbuf.st_size), s);
comma = ',';
found = true;
}
}
fclose(fp);
}
if (!found) {
std::string str = subject;
transform(str.begin(), str.end(), str.begin(), tolower);
if (str.rfind(".json") == str.length() - 5) {
printf(" %c{\n \"data\" : \"%s\",\n \"attr\" : { \"id\" : \"%s\", \"size\": %d, \"type\": \"json\" },\n \"children\" : [] }\n",
comma, d->d_name, join_path(m_url.get_path(), d->d_name).substr(5).c_str(), int(statbuf.st_size));
comma = ',';
}
}
}
close(fd);
}
printf("]\n");
closedir(dir);
}
void query(const char* sql)
{
Query query("result", sql);
query.parse();
std::vector<std::string> in_files;
int i = 0;
while (true) {
char param[50] = "file";
std::string par = "file";
if (i > 0) {
snprintf(param, sizeof(param) - 1, "file%d", i);
param[49] = 0;
}
i++;
const char* f = m_url.get_param(param);
if (!f)
break;
std::string file = join_path(g_server->m_pcaproot, f);
in_files.push_back(file);
}
Reader reader(in_files, g_app->get_limit());
query.execute(reader);
query.m_result->json(false);
}
Url m_url;
};
class Http_socket : public Socket {
private:
Http_socket& operator=(const Http_socket& other);
Http_socket(Http_socket&& other) noexcept;
Http_socket const& operator=(Http_socket&& other);
public:
enum State {
get_post,
header,
body,
error,
wait_child,
done
};
Http_socket(int socket)
: Socket(socket, false)
, m_http_version(0)
, m_emptyline(0)
{
m_state = get_post;
m_nextc = -1;
m_cr = false;
m_line = "";
m_url = "";
m_child_fd = 0;
m_child_pid = 0;
m_child_read = 0;
m_body_cnt = -1;
m_content_len = 0;
}
~Http_socket()
{
if (m_child_pid) {
kill(m_child_pid, SIGHUP);
int status;
waitpid(m_child_pid, &status, 0);
}
if (m_child_fd)
close(m_child_fd);
m_file = 0;
}
inline void print(const char* fmt, ...)
{
char string[4096];
va_list ap;
va_start(ap, fmt);
vsnprintf(string, sizeof(string), fmt, ap);
va_end(ap);
m_write.write((unsigned char*)string, strlen(string));
}
int peek()
{
if (m_nextc >= 0)
return m_nextc;
m_nextc = m_read.get();
return m_nextc;
}
int getc()
{
int c = peek();
m_nextc = -1;
return c;
}
void on_read()
{
while (true) {
int c = peek();
if (c == -1)
return;
if (m_body_cnt >= 0) {
c = getc();
if (!(m_body_cnt == 0 && c == 10)) {
m_line += char(c);
m_content_len--;
}
m_body_cnt++;
if (m_content_len == 0)
parseline();
continue;
}
c = getc();
if (c != 13 && c != 10) {
m_line += char(c);
m_cr = false;
} else {
bool cr = m_cr;
m_cr = false;
if (c == 10 && cr) {
continue;
}
if (c == 13)
m_cr = true;
parseline();
}
}
}
virtual void file_read()
{
set_want_write();
}
virtual void file_write()
{
}
void on_write()
{
set_want_write(false);
if (m_state == wait_child) {
unsigned char buffer[4096];
int status;
bool done = true;
if (0 == waitpid(m_child_pid, &status, WNOHANG)) {
done = false;
}
if (m_child_fd) {
// Add non-blocking flag
int flags;
if ((flags = fcntl(m_child_fd, F_GETFL)) == -1) {
syslog(LOG_ERR | LOG_USER, "fcntl(%d, F_GETFL) failed: %d\n", m_child_fd, errno);
exit(-1);
}
if (fcntl(m_child_fd, F_SETFL, flags | O_NONBLOCK)) {
syslog(LOG_ERR | LOG_USER, "fcntl(%d, F_SETFL, 0x%x) failed: %d\n", m_child_fd, errno, flags | O_NONBLOCK);
exit(-1);
}
size_t res;
pollfd pfd;
pfd.fd = m_child_fd;
pfd.events = POLLIN;
pfd.revents = 0;
if (1 == poll(&pfd, 1, 0) && (pfd.revents & POLLIN) != 0) {
if ((res = read(m_child_fd, buffer, (int)sizeof(buffer))) > 0) {
done = false;
m_child_read += res;
m_write.write(buffer, res);
}
}
}
if (done) {
m_child_pid = 0;
if (m_child_fd) {
close(m_child_fd);
m_child_fd = 0;
m_file = 0;
}
set_delete();
}
}
}
void parseline()
{
switch (m_state) {
case (get_post): {
m_state = error;
syslog(LOG_INFO | LOG_USER, "%s\n", m_line.c_str());
int p = 0;
if (m_line.find("GET ") != -1) {
if ((p = m_line.find(" HTTP/1.1")) != -1) {
m_http_version = 1;
} else if ((p = m_line.find(" HTTP/1.0")) != -1) {
m_http_version = 0;
} else {
return;
}
m_url = m_line.substr(4, p - 4);
m_state = header;
} else if (m_line.find("POST ") != -1) {
if ((p = m_line.find(" HTTP/1.1")) != -1) {
m_http_version = 1;
} else if ((p = m_line.find(" HTTP/1.0")) != -1) {
m_http_version = 0;
} else {
return;
}
m_url = m_line.substr(5, p - 5);
m_state = header;
}
} break;
case (header):
if (m_line.length() == 0) {
m_body_cnt = 0;
m_state = body;
} else {
int colon = m_line.find(": ");
std::string key = m_line.substr(0, colon);
std::string val = m_line.substr(colon + 2);
if (key == "Content-Length") {
if (val.length() > 0)
m_content_len = atoi(val.c_str());
}
}
break;
case (body):
m_body = m_line;
header_done();
break;
default:
printf("error line: %s !\n", m_line.c_str());
break;
}
m_line = "";
}
void header_done()
{
fflush(stdout); // required before fork or any unflushed output will go to the client
int fd[2];
if (pipe(fd) < 0)
return;
// Add non-blocking flag
int flags;
if ((flags = fcntl(fd[0], F_GETFL)) == -1) {
syslog(LOG_ERR | LOG_USER, "fcntl(%d, F_GETFL) failed: %d\n", fd[0], errno);
exit(-1);
}
if (fcntl(fd[0], F_SETFL, flags | O_NONBLOCK)) {
syslog(LOG_ERR | LOG_USER, "fcntl(%d, F_SETFL, 0x%x) failed: %d\n", fd[0], errno, flags | O_NONBLOCK);
exit(-1);
}
m_child_pid = fork();
if (m_child_pid < 0) {
print("Internal error");
set_delete();
return;
}
if (m_child_pid == 0) {
////////// child code /////////
dup2(fd[1], fileno(stdout));
dup2(fd[1], fileno(stderr));
close(fd[1]);
Page page(m_url.c_str(), m_body.c_str());
page.process();
fflush(stdout);
exit(0);
///////////// child exit() ///////////////
} else {
close(fd[1]);
m_child_fd = fd[0];
m_file = m_child_fd;
m_state = wait_child;
}
set_want_write();
}
State m_state;
bool m_cr;
int m_body_cnt;
int m_content_len;
int m_nextc;
int m_child_pid;
int m_child_fd;
int m_child_read;
int m_http_version; // 0 = HTTP/1.0 1 = HTTP/1.1
int m_emptyline;
std::string m_line;
std::string m_url;
std::string m_body;
};
} // namespace httpd
using namespace httpd;
void start_server(int port, bool fork_me, const std::string& pcaproot, const std::string& webroot, int max_conn)
{
pid_t pid, sid;
bool fg = !fork_me;
printf("listening on port %d\n", port);
if (!fg) {
pid = fork();
if (pid < 0) {
exit(EXIT_FAILURE);
} else if (pid > 0) {
exit(EXIT_SUCCESS);
}
sid = setsid();
if (sid < 0) {
exit(EXIT_FAILURE);
}
}
openlog("packetq", LOG_PID, LOG_USER);
httpd::Server server(port, pcaproot, webroot);
g_server = &server;
while (true) {
httpd::g_pool.select();
int cnt = g_pool.get_sockets();
if (cnt < max_conn) {
int c = server.get_connection();
if (c > -1) {
Http_socket* s = new (std::nothrow) Http_socket(c);
if (s && s->failed()) {
syslog(LOG_ERR | LOG_USER, "failed to create socket");
delete s;
}
}
}
usleep(1000);
}
// loop will never break
// g_server = 0;
// syslog(LOG_INFO | LOG_USER, "exiting");
// exit(EXIT_SUCCESS);
}
} // namespace packetq
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