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mongoose.c
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mongoose.c
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// Copyright (c) 2004-2013 Sergey Lyubka <[email protected]>
// Copyright (c) 2013-2014 Cesanta Software Limited
// All rights reserved
//
// This library is dual-licensed: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation. For the terms of this
// license, see <http://www.gnu.org/licenses/>.
//
// You are free to use this library under the terms of the GNU General
// Public License, 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.
//
// Alternatively, you can license this library under a commercial
// license, as set out in <http://cesanta.com/>.
#ifdef NOEMBED_NET_SKELETON
#include "net_skeleton.h"
#else
// net_skeleton start
// Copyright (c) 2014 Cesanta Software Limited
// All rights reserved
//
// This library is dual-licensed: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation. For the terms of this
// license, see <http://www.gnu.org/licenses/>.
//
// You are free to use this library under the terms of the GNU General
// Public License, 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.
//
// Alternatively, you can license this library under a commercial
// license, as set out in <http://cesanta.com/>.
#ifndef NS_SKELETON_HEADER_INCLUDED
#define NS_SKELETON_HEADER_INCLUDED
#define NS_SKELETON_VERSION "1.0"
#undef UNICODE // Use ANSI WinAPI functions
#undef _UNICODE // Use multibyte encoding on Windows
#define _MBCS // Use multibyte encoding on Windows
#define _INTEGRAL_MAX_BITS 64 // Enable _stati64() on Windows
#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005+
#undef WIN32_LEAN_AND_MEAN // Let windows.h always include winsock2.h
#define _XOPEN_SOURCE 600 // For flockfile() on Linux
#define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++
#define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX
#define _LARGEFILE_SOURCE // Enable fseeko() and ftello() functions
#define _FILE_OFFSET_BITS 64 // Enable 64-bit file offsets
#ifdef _MSC_VER
#pragma warning (disable : 4127) // FD_SET() emits warning, disable it
#pragma warning (disable : 4204) // missing c99 support
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#ifdef _WIN32
#pragma comment(lib, "ws2_32.lib") // Linking with winsock library
#include <windows.h>
#include <process.h>
#ifndef EINPROGRESS
#define EINPROGRESS WSAEINPROGRESS
#endif
#ifndef EWOULDBLOCK
#define EWOULDBLOCK WSAEWOULDBLOCK
#endif
#ifndef __func__
#define STRX(x) #x
#define STR(x) STRX(x)
#define __func__ __FILE__ ":" STR(__LINE__)
#endif
#ifndef va_copy
#define va_copy(x,y) x = y
#endif // MINGW #defines va_copy
#define snprintf _snprintf
#define vsnprintf _vsnprintf
#define to64(x) _atoi64(x)
typedef int socklen_t;
typedef unsigned char uint8_t;
typedef unsigned int uint32_t;
typedef unsigned short uint16_t;
typedef unsigned __int64 uint64_t;
typedef __int64 int64_t;
typedef SOCKET sock_t;
#else
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <pthread.h>
#include <stdarg.h>
#include <unistd.h>
#include <arpa/inet.h> // For inet_pton() when NS_ENABLE_IPV6 is defined
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/select.h>
#define closesocket(x) close(x)
#define __cdecl
#define INVALID_SOCKET (-1)
#define to64(x) strtoll(x, NULL, 10)
typedef int sock_t;
#endif
#ifdef NS_ENABLE_DEBUG
#define DBG(x) do { printf("%-20s ", __func__); printf x; putchar('\n'); \
fflush(stdout); } while(0)
#else
#define DBG(x)
#endif
#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
#ifdef NS_ENABLE_SSL
#ifdef __APPLE__
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif
#include <openssl/ssl.h>
#else
typedef void *SSL;
typedef void *SSL_CTX;
#endif
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
union socket_address {
struct sockaddr sa;
struct sockaddr_in sin;
#ifdef NS_ENABLE_IPV6
struct sockaddr_in6 sin6;
#endif
};
struct iobuf {
char *buf;
int len;
int size;
};
void iobuf_init(struct iobuf *, int initial_size);
void iobuf_free(struct iobuf *);
int iobuf_append(struct iobuf *, const void *data, int data_size);
void iobuf_remove(struct iobuf *, int data_size);
struct ns_connection;
enum ns_event { NS_POLL, NS_ACCEPT, NS_CONNECT, NS_RECV, NS_SEND, NS_CLOSE };
typedef void (*ns_callback_t)(struct ns_connection *, enum ns_event, void *);
struct ns_server {
void *server_data;
union socket_address listening_sa;
sock_t listening_sock;
struct ns_connection *active_connections;
ns_callback_t callback;
SSL_CTX *ssl_ctx;
SSL_CTX *client_ssl_ctx;
sock_t ctl[2];
};
struct ns_connection {
struct ns_connection *prev, *next;
struct ns_server *server;
void *connection_data;
time_t last_io_time;
sock_t sock;
struct iobuf recv_iobuf;
struct iobuf send_iobuf;
SSL *ssl;
unsigned int flags;
#define NSF_FINISHED_SENDING_DATA (1 << 0)
#define NSF_BUFFER_BUT_DONT_SEND (1 << 1)
#define NSF_SSL_HANDSHAKE_DONE (1 << 2)
#define NSF_CONNECTING (1 << 3)
#define NSF_CLOSE_IMMEDIATELY (1 << 4)
#define NSF_ACCEPTED (1 << 5)
#define NSF_USER_1 (1 << 6)
#define NSF_USER_2 (1 << 7)
#define NSF_USER_3 (1 << 8)
#define NSF_USER_4 (1 << 9)
};
void ns_server_init(struct ns_server *, void *server_data, ns_callback_t);
void ns_server_free(struct ns_server *);
int ns_server_poll(struct ns_server *, int milli);
void ns_server_wakeup(struct ns_server *);
void ns_iterate(struct ns_server *, ns_callback_t cb, void *param);
struct ns_connection *ns_add_sock(struct ns_server *, sock_t sock, void *p);
int ns_bind(struct ns_server *, const char *addr);
int ns_set_ssl_cert(struct ns_server *, const char *ssl_cert);
struct ns_connection *ns_connect(struct ns_server *, const char *host,
int port, int ssl, void *connection_param);
int ns_send(struct ns_connection *, const void *buf, int len);
int ns_printf(struct ns_connection *, const char *fmt, ...);
int ns_vprintf(struct ns_connection *, const char *fmt, va_list ap);
// Utility functions
void *ns_start_thread(void *(*f)(void *), void *p);
int ns_socketpair(sock_t [2]);
void ns_set_close_on_exec(sock_t);
#ifdef __cplusplus
}
#endif // __cplusplus
#endif // NS_SKELETON_HEADER_INCLUDED
// Copyright (c) 2014 Cesanta Software Limited
// All rights reserved
//
// This library is dual-licensed: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
// published by the Free Software Foundation. For the terms of this
// license, see <http://www.gnu.org/licenses/>.
//
// You are free to use this library under the terms of the GNU General
// Public License, 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.
//
// Alternatively, you can license this library under a commercial
// license, as set out in <http://cesanta.com/>.
#ifndef NS_MALLOC
#define NS_MALLOC malloc
#endif
#ifndef NS_REALLOC
#define NS_REALLOC realloc
#endif
#ifndef NS_FREE
#define NS_FREE free
#endif
#ifndef IOBUF_RESIZE_MULTIPLIER
#define IOBUF_RESIZE_MULTIPLIER 2.0
#endif
void iobuf_init(struct iobuf *iobuf, int size) {
iobuf->len = iobuf->size = 0;
iobuf->buf = NULL;
if (size > 0 && (iobuf->buf = (char *) NS_MALLOC(size)) != NULL) {
iobuf->size = size;
}
}
void iobuf_free(struct iobuf *iobuf) {
if (iobuf != NULL) {
if (iobuf->buf != NULL) NS_FREE(iobuf->buf);
iobuf_init(iobuf, 0);
}
}
int iobuf_append(struct iobuf *io, const void *buf, int len) {
static const double mult = IOBUF_RESIZE_MULTIPLIER;
char *p = NULL;
int new_len = 0;
assert(io->len >= 0);
assert(io->len <= io->size);
if (len <= 0) {
} else if ((new_len = io->len + len) < io->size) {
memcpy(io->buf + io->len, buf, len);
io->len = new_len;
} else if ((p = (char *)
NS_REALLOC(io->buf, (int) (new_len * mult))) != NULL) {
io->buf = p;
memcpy(io->buf + io->len, buf, len);
io->len = new_len;
io->size = (int) (new_len * mult);
} else {
len = 0;
}
return len;
}
void iobuf_remove(struct iobuf *io, int n) {
if (n >= 0 && n <= io->len) {
memmove(io->buf, io->buf + n, io->len - n);
io->len -= n;
}
}
#ifndef NS_DISABLE_THREADS
void *ns_start_thread(void *(*f)(void *), void *p) {
#ifdef _WIN32
return (void *) _beginthread((void (__cdecl *)(void *)) f, 0, p);
#else
pthread_t thread_id = (pthread_t) 0;
pthread_attr_t attr;
(void) pthread_attr_init(&attr);
(void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
#if NS_STACK_SIZE > 1
(void) pthread_attr_setstacksize(&attr, NS_STACK_SIZE);
#endif
pthread_create(&thread_id, &attr, f, p);
pthread_attr_destroy(&attr);
return (void *) thread_id;
#endif
}
#endif // NS_DISABLE_THREADS
static void ns_add_conn(struct ns_server *server, struct ns_connection *c) {
c->next = server->active_connections;
server->active_connections = c;
c->prev = NULL;
if (c->next != NULL) c->next->prev = c;
}
static void ns_remove_conn(struct ns_connection *conn) {
if (conn->prev == NULL) conn->server->active_connections = conn->next;
if (conn->prev) conn->prev->next = conn->next;
if (conn->next) conn->next->prev = conn->prev;
}
// Print message to buffer. If buffer is large enough to hold the message,
// return buffer. If buffer is to small, allocate large enough buffer on heap,
// and return allocated buffer.
static int ns_avprintf(char **buf, size_t size, const char *fmt, va_list ap) {
va_list ap_copy;
int len;
va_copy(ap_copy, ap);
len = vsnprintf(*buf, size, fmt, ap_copy);
va_end(ap_copy);
if (len < 0) {
// eCos and Windows are not standard-compliant and return -1 when
// the buffer is too small. Keep allocating larger buffers until we
// succeed or out of memory.
*buf = NULL;
while (len < 0) {
if (*buf) free(*buf);
size *= 2;
if ((*buf = (char *) NS_MALLOC(size)) == NULL) break;
va_copy(ap_copy, ap);
len = vsnprintf(*buf, size, fmt, ap_copy);
va_end(ap_copy);
}
} else if (len > (int) size) {
// Standard-compliant code path. Allocate a buffer that is large enough.
if ((*buf = (char *) NS_MALLOC(len + 1)) == NULL) {
len = -1;
} else {
va_copy(ap_copy, ap);
len = vsnprintf(*buf, len + 1, fmt, ap_copy);
va_end(ap_copy);
}
}
return len;
}
int ns_vprintf(struct ns_connection *conn, const char *fmt, va_list ap) {
char mem[2000], *buf = mem;
int len;
if ((len = ns_avprintf(&buf, sizeof(mem), fmt, ap)) > 0) {
iobuf_append(&conn->send_iobuf, buf, len);
}
if (buf != mem && buf != NULL) {
free(buf);
}
return len;
}
int ns_printf(struct ns_connection *conn, const char *fmt, ...) {
int len;
va_list ap;
va_start(ap, fmt);
len = ns_vprintf(conn, fmt, ap);
va_end(ap);
return len;
}
static void ns_call(struct ns_connection *conn, enum ns_event ev, void *p) {
if (conn->server->callback) conn->server->callback(conn, ev, p);
}
static void ns_close_conn(struct ns_connection *conn) {
DBG(("%p %d", conn, conn->flags));
ns_call(conn, NS_CLOSE, NULL);
ns_remove_conn(conn);
closesocket(conn->sock);
iobuf_free(&conn->recv_iobuf);
iobuf_free(&conn->send_iobuf);
NS_FREE(conn);
}
void ns_set_close_on_exec(sock_t sock) {
#ifdef _WIN32
(void) SetHandleInformation((HANDLE) sock, HANDLE_FLAG_INHERIT, 0);
#else
fcntl(sock, F_SETFD, FD_CLOEXEC);
#endif
}
static void ns_set_non_blocking_mode(sock_t sock) {
#ifdef _WIN32
unsigned long on = 1;
ioctlsocket(sock, FIONBIO, &on);
#else
int flags = fcntl(sock, F_GETFL, 0);
fcntl(sock, F_SETFL, flags | O_NONBLOCK);
#endif
}
#ifndef NS_DISABLE_SOCKETPAIR
int ns_socketpair(sock_t sp[2]) {
struct sockaddr_in sa;
sock_t sock;
socklen_t len = sizeof(sa);
int ret = 0;
sp[0] = sp[1] = INVALID_SOCKET;
(void) memset(&sa, 0, sizeof(sa));
sa.sin_family = AF_INET;
sa.sin_port = htons(0);
sa.sin_addr.s_addr = htonl(0x7f000001);
if ((sock = socket(AF_INET, SOCK_STREAM, 0)) != INVALID_SOCKET &&
!bind(sock, (struct sockaddr *) &sa, len) &&
!listen(sock, 1) &&
!getsockname(sock, (struct sockaddr *) &sa, &len) &&
(sp[0] = socket(AF_INET, SOCK_STREAM, 6)) != -1 &&
!connect(sp[0], (struct sockaddr *) &sa, len) &&
(sp[1] = accept(sock,(struct sockaddr *) &sa, &len)) != INVALID_SOCKET) {
ns_set_close_on_exec(sp[0]);
ns_set_close_on_exec(sp[1]);
ret = 1;
} else {
if (sp[0] != INVALID_SOCKET) closesocket(sp[0]);
if (sp[1] != INVALID_SOCKET) closesocket(sp[1]);
sp[0] = sp[1] = INVALID_SOCKET;
}
closesocket(sock);
return ret;
}
#endif // NS_DISABLE_SOCKETPAIR
// Valid listening port spec is: [ip_address:]port, e.g. "80", "127.0.0.1:3128"
static int ns_parse_port_string(const char *str, union socket_address *sa) {
unsigned int a, b, c, d, port;
int len = 0;
#ifdef NS_ENABLE_IPV6
char buf[100];
#endif
// MacOS needs that. If we do not zero it, subsequent bind() will fail.
// Also, all-zeroes in the socket address means binding to all addresses
// for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
memset(sa, 0, sizeof(*sa));
sa->sin.sin_family = AF_INET;
if (sscanf(str, "%u.%u.%u.%u:%u%n", &a, &b, &c, &d, &port, &len) == 5) {
// Bind to a specific IPv4 address, e.g. 192.168.1.5:8080
sa->sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
sa->sin.sin_port = htons((uint16_t) port);
#ifdef NS_ENABLE_IPV6
} else if (sscanf(str, "[%49[^]]]:%u%n", buf, &port, &len) == 2 &&
inet_pton(AF_INET6, buf, &sa->sin6.sin6_addr)) {
// IPv6 address, e.g. [3ffe:2a00:100:7031::1]:8080
sa->sin6.sin6_family = AF_INET6;
sa->sin6.sin6_port = htons((uint16_t) port);
#endif
} else if (sscanf(str, "%u%n", &port, &len) == 1) {
// If only port is specified, bind to IPv4, INADDR_ANY
sa->sin.sin_port = htons((uint16_t) port);
} else {
port = 0; // Parsing failure. Make port invalid.
}
return port <= 0xffff && str[len] == '\0';
}
// 'sa' must be an initialized address to bind to
static sock_t ns_open_listening_socket(union socket_address *sa) {
socklen_t len = sizeof(*sa);
sock_t on = 1, sock = INVALID_SOCKET;
if ((sock = socket(sa->sa.sa_family, SOCK_STREAM, 6)) != INVALID_SOCKET &&
!setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *) &on, sizeof(on)) &&
!bind(sock, &sa->sa, sa->sa.sa_family == AF_INET ?
sizeof(sa->sin) : sizeof(sa->sa)) &&
!listen(sock, SOMAXCONN)) {
ns_set_non_blocking_mode(sock);
// In case port was set to 0, get the real port number
(void) getsockname(sock, &sa->sa, &len);
} else if (sock != INVALID_SOCKET) {
closesocket(sock);
sock = INVALID_SOCKET;
}
return sock;
}
int ns_set_ssl_cert(struct ns_server *server, const char *cert) {
#ifdef NS_ENABLE_SSL
if (cert != NULL &&
(server->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) {
return -1;
} else if (SSL_CTX_use_certificate_file(server->ssl_ctx, cert, 1) == 0 ||
SSL_CTX_use_PrivateKey_file(server->ssl_ctx, cert, 1) == 0) {
return -2;
} else {
SSL_CTX_use_certificate_chain_file(server->ssl_ctx, cert);
}
return 0;
#else
return server != NULL && cert == NULL ? 0 : -3;
#endif
}
int ns_bind(struct ns_server *server, const char *str) {
ns_parse_port_string(str, &server->listening_sa);
if (server->listening_sock != INVALID_SOCKET) {
closesocket(server->listening_sock);
}
server->listening_sock = ns_open_listening_socket(&server->listening_sa);
return server->listening_sock == INVALID_SOCKET ? -1 :
(int) ntohs(server->listening_sa.sin.sin_port);
}
static struct ns_connection *accept_conn(struct ns_server *server) {
struct ns_connection *c = NULL;
union socket_address sa;
socklen_t len = sizeof(sa);
sock_t sock = INVALID_SOCKET;
// NOTE(lsm): on Windows, sock is always > FD_SETSIZE
if ((sock = accept(server->listening_sock, &sa.sa, &len)) == INVALID_SOCKET) {
closesocket(sock);
} else if ((c = (struct ns_connection *) NS_MALLOC(sizeof(*c))) == NULL ||
memset(c, 0, sizeof(*c)) == NULL) {
closesocket(sock);
#ifdef NS_ENABLE_SSL
} else if (server->ssl_ctx != NULL &&
((c->ssl = SSL_new(server->ssl_ctx)) == NULL ||
SSL_set_fd(c->ssl, sock) != 1)) {
DBG(("SSL error"));
closesocket(sock);
free(c);
c = NULL;
#endif
} else {
ns_set_close_on_exec(sock);
ns_set_non_blocking_mode(sock);
c->server = server;
c->sock = sock;
c->flags |= NSF_ACCEPTED;
ns_add_conn(server, c);
ns_call(c, NS_ACCEPT, &sa);
DBG(("%p %d %p %p", c, c->sock, c->ssl, server->ssl_ctx));
}
return c;
}
static int ns_is_error(int n) {
return n == 0 ||
(n < 0 && errno != EINTR && errno != EINPROGRESS &&
errno != EAGAIN && errno != EWOULDBLOCK
#ifdef _WIN32
&& WSAGetLastError() != WSAEINTR && WSAGetLastError() != WSAEWOULDBLOCK
#endif
);
}
#ifdef NS_ENABLE_HEXDUMP
static void ns_hexdump(const struct ns_connection *conn, const void *buf,
int len, const char *marker) {
const unsigned char *p = (const unsigned char *) buf;
char path[500], date[100], ascii[17];
FILE *fp;
#if 0
if (!match_prefix(NS_ENABLE_HEXDUMP, strlen(NS_ENABLE_HEXDUMP),
conn->remote_ip)) {
return;
}
snprintf(path, sizeof(path), "%s.%hu.txt",
conn->mg_conn.remote_ip, conn->mg_conn.remote_port);
#endif
snprintf(path, sizeof(path), "%p.txt", conn);
if ((fp = fopen(path, "a")) != NULL) {
time_t cur_time = time(NULL);
int i, idx;
strftime(date, sizeof(date), "%d/%b/%Y %H:%M:%S", localtime(&cur_time));
fprintf(fp, "%s %s %d bytes\n", marker, date, len);
for (i = 0; i < len; i++) {
idx = i % 16;
if (idx == 0) {
if (i > 0) fprintf(fp, " %s\n", ascii);
fprintf(fp, "%04x ", i);
}
fprintf(fp, " %02x", p[i]);
ascii[idx] = p[i] < 0x20 || p[i] > 0x7e ? '.' : p[i];
ascii[idx + 1] = '\0';
}
while (i++ % 16) fprintf(fp, "%s", " ");
fprintf(fp, " %s\n\n", ascii);
fclose(fp);
}
}
#endif
static void ns_read_from_socket(struct ns_connection *conn) {
char buf[2048];
int n = 0;
if (conn->flags & NSF_CONNECTING) {
int ok = 1, ret;
socklen_t len = sizeof(ok);
ret = getsockopt(conn->sock, SOL_SOCKET, SO_ERROR, (char *) &ok, &len);
(void) ret;
#ifdef NS_ENABLE_SSL
if (ret == 0 && ok == 0 && conn->ssl != NULL) {
int res = SSL_connect(conn->ssl);
int ssl_err = SSL_get_error(conn->ssl, res);
DBG(("%p SSL_connect %d %d", conn, res, ssl_err));
if (res == 1) {
conn->flags = NSF_SSL_HANDSHAKE_DONE;
} else if (ssl_err == 2 || ssl_err == 3) {
return; // Call us again
} else {
ok = 1;
}
}
#endif
conn->flags &= ~NSF_CONNECTING;
DBG(("%p ok=%d", conn, ok));
if (ok != 0) {
conn->flags |= NSF_CLOSE_IMMEDIATELY;
}
ns_call(conn, NS_CONNECT, &ok);
return;
}
#ifdef NS_ENABLE_SSL
if (conn->ssl != NULL) {
if (conn->flags & NSF_SSL_HANDSHAKE_DONE) {
n = SSL_read(conn->ssl, buf, sizeof(buf));
} else {
int res = SSL_accept(conn->ssl);
int ssl_err = SSL_get_error(conn->ssl, res);
DBG(("%p SSL_accept %d %d", conn, res, ssl_err));
if (res == 1) {
conn->flags |= NSF_SSL_HANDSHAKE_DONE;
} else if (ssl_err == 2 || ssl_err == 3) {
return; // Call us again
} else {
conn->flags |= NSF_CLOSE_IMMEDIATELY;
}
return;
}
} else
#endif
{
n = recv(conn->sock, buf, sizeof(buf), 0);
}
#ifdef NS_ENABLE_HEXDUMP
ns_hexdump(conn, buf, n, "<-");
#endif
DBG(("%p <- %d bytes [%.*s%s]",
conn, n, n < 40 ? n : 40, buf, n < 40 ? "" : "..."));
if (ns_is_error(n)) {
conn->flags |= NSF_CLOSE_IMMEDIATELY;
} else if (n > 0) {
iobuf_append(&conn->recv_iobuf, buf, n);
ns_call(conn, NS_RECV, &n);
}
}
static void ns_write_to_socket(struct ns_connection *conn) {
struct iobuf *io = &conn->send_iobuf;
int n = 0;
#ifdef NS_ENABLE_SSL
if (conn->ssl != NULL) {
n = SSL_write(conn->ssl, io->buf, io->len);
} else
#endif
{ n = send(conn->sock, io->buf, io->len, 0); }
#ifdef NS_ENABLE_HEXDUMP
ns_hexdump(conn, io->buf, n, "->");
#endif
DBG(("%p -> %d bytes %d [%.*s%s]", conn, n, conn->flags,
io->len < 40 ? io->len : 40,
io->buf, io->len < 40 ? "" : "..."));
if (ns_is_error(n)) {
conn->flags |= NSF_CLOSE_IMMEDIATELY;
} else if (n > 0) {
iobuf_remove(io, n);
//conn->num_bytes_sent += n;
}
if (io->len == 0 && conn->flags & NSF_FINISHED_SENDING_DATA) {
conn->flags |= NSF_CLOSE_IMMEDIATELY;
}
ns_call(conn, NS_SEND, NULL);
}
int ns_send(struct ns_connection *conn, const void *buf, int len) {
return iobuf_append(&conn->send_iobuf, buf, len);
}
static void ns_add_to_set(sock_t sock, fd_set *set, sock_t *max_fd) {
if (sock != INVALID_SOCKET) {
FD_SET(sock, set);
if (*max_fd == INVALID_SOCKET || sock > *max_fd) {
*max_fd = sock;
}
}
}
int ns_server_poll(struct ns_server *server, int milli) {
struct ns_connection *conn, *tmp_conn;
struct timeval tv;
fd_set read_set, write_set;
int num_active_connections = 0;
sock_t max_fd = INVALID_SOCKET;
time_t current_time = time(NULL);
if (server->listening_sock == INVALID_SOCKET &&
server->active_connections == NULL) return 0;
FD_ZERO(&read_set);
FD_ZERO(&write_set);
ns_add_to_set(server->listening_sock, &read_set, &max_fd);
ns_add_to_set(server->ctl[1], &read_set, &max_fd);
for (conn = server->active_connections; conn != NULL; conn = tmp_conn) {
tmp_conn = conn->next;
ns_call(conn, NS_POLL, ¤t_time);
ns_add_to_set(conn->sock, &read_set, &max_fd);
if (conn->flags & NSF_CONNECTING) {
ns_add_to_set(conn->sock, &write_set, &max_fd);
}
if (conn->send_iobuf.len > 0 && !(conn->flags & NSF_BUFFER_BUT_DONT_SEND)) {
ns_add_to_set(conn->sock, &write_set, &max_fd);
} else if (conn->flags & NSF_CLOSE_IMMEDIATELY) {
ns_close_conn(conn);
}
}
tv.tv_sec = milli / 1000;
tv.tv_usec = (milli % 1000) * 1000;
if (select((int) max_fd + 1, &read_set, &write_set, NULL, &tv) > 0) {
// Accept new connections
if (server->listening_sock != INVALID_SOCKET &&
FD_ISSET(server->listening_sock, &read_set)) {
// We're not looping here, and accepting just one connection at
// a time. The reason is that eCos does not respect non-blocking
// flag on a listening socket and hangs in a loop.
if ((conn = accept_conn(server)) != NULL) {
conn->last_io_time = current_time;
}
}
// Read possible wakeup calls
if (server->ctl[1] != INVALID_SOCKET &&
FD_ISSET(server->ctl[1], &read_set)) {
unsigned char ch;
recv(server->ctl[1], &ch, 1, 0);
send(server->ctl[1], &ch, 1, 0);
}
for (conn = server->active_connections; conn != NULL; conn = tmp_conn) {
tmp_conn = conn->next;
if (FD_ISSET(conn->sock, &read_set)) {
conn->last_io_time = current_time;
ns_read_from_socket(conn);
}
if (FD_ISSET(conn->sock, &write_set)) {
if (conn->flags & NSF_CONNECTING) {
ns_read_from_socket(conn);
} else if (!(conn->flags & NSF_BUFFER_BUT_DONT_SEND)) {
conn->last_io_time = current_time;
ns_write_to_socket(conn);
}
}
}
}
for (conn = server->active_connections; conn != NULL; conn = tmp_conn) {
tmp_conn = conn->next;
num_active_connections++;
if (conn->flags & NSF_CLOSE_IMMEDIATELY) {
ns_close_conn(conn);
}
}
//DBG(("%d active connections", num_active_connections));
return num_active_connections;
}
struct ns_connection *ns_connect(struct ns_server *server, const char *host,
int port, int use_ssl, void *param) {
sock_t sock = INVALID_SOCKET;
struct sockaddr_in sin;
struct hostent *he = NULL;
struct ns_connection *conn = NULL;
int connect_ret_val;
(void) use_ssl;
if (host == NULL || (he = gethostbyname(host)) == NULL ||
(sock = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
DBG(("gethostbyname(%s) failed: %s", host, strerror(errno)));
return NULL;
}
sin.sin_family = AF_INET;
sin.sin_port = htons((uint16_t) port);
sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
ns_set_non_blocking_mode(sock);
connect_ret_val = connect(sock, (struct sockaddr *) &sin, sizeof(sin));
if (ns_is_error(connect_ret_val)) {
closesocket(sock);
return NULL;
} else if ((conn = (struct ns_connection *)
NS_MALLOC(sizeof(*conn))) == NULL) {
closesocket(sock);
return NULL;
}
memset(conn, 0, sizeof(*conn));
conn->server = server;
conn->sock = sock;
conn->connection_data = param;
conn->flags = NSF_CONNECTING;
conn->last_io_time = time(NULL);
#ifdef NS_ENABLE_SSL
if (use_ssl &&
(conn->ssl = SSL_new(server->client_ssl_ctx)) != NULL) {
SSL_set_fd(conn->ssl, sock);
}
#endif
ns_add_conn(server, conn);
DBG(("%p %s:%d %d %p", conn, host, port, conn->sock, conn->ssl));
return conn;
}
struct ns_connection *ns_add_sock(struct ns_server *s, sock_t sock, void *p) {
struct ns_connection *conn;
if ((conn = (struct ns_connection *) NS_MALLOC(sizeof(*conn))) != NULL) {
memset(conn, 0, sizeof(*conn));
ns_set_non_blocking_mode(sock);
conn->sock = sock;
conn->connection_data = p;
conn->server = s;
conn->last_io_time = time(NULL);
ns_add_conn(s, conn);
DBG(("%p %d", conn, sock));
}
return conn;
}
void ns_iterate(struct ns_server *server, ns_callback_t cb, void *param) {
struct ns_connection *conn, *tmp_conn;
for (conn = server->active_connections; conn != NULL; conn = tmp_conn) {
tmp_conn = conn->next;
cb(conn, NS_POLL, param);
}
}
void ns_server_wakeup(struct ns_server *server) {
unsigned char ch = 0;
if (server->ctl[0] != INVALID_SOCKET) {
send(server->ctl[0], &ch, 1, 0);
recv(server->ctl[0], &ch, 1, 0);
}
}
void ns_server_init(struct ns_server *s, void *server_data, ns_callback_t cb) {
memset(s, 0, sizeof(*s));
s->listening_sock = s->ctl[0] = s->ctl[1] = INVALID_SOCKET;
s->server_data = server_data;
s->callback = cb;
#ifdef _WIN32
{ WSADATA data; WSAStartup(MAKEWORD(2, 2), &data); }
#else
// Ignore SIGPIPE signal, so if client cancels the request, it
// won't kill the whole process.
signal(SIGPIPE, SIG_IGN);
#endif
#ifndef NS_DISABLE_SOCKETPAIR
do {
ns_socketpair(s->ctl);
} while (s->ctl[0] == INVALID_SOCKET);
#endif
#ifdef NS_ENABLE_SSL
SSL_library_init();
s->client_ssl_ctx = SSL_CTX_new(SSLv23_client_method());
#endif
}
void ns_server_free(struct ns_server *s) {
struct ns_connection *conn, *tmp_conn;
DBG(("%p", s));
if (s == NULL) return;
// Do one last poll, see https://github.com/cesanta/mongoose/issues/286
ns_server_poll(s, 0);
if (s->listening_sock != INVALID_SOCKET) closesocket(s->listening_sock);
if (s->ctl[0] != INVALID_SOCKET) closesocket(s->ctl[0]);
if (s->ctl[1] != INVALID_SOCKET) closesocket(s->ctl[1]);
s->listening_sock = s->ctl[0] = s->ctl[1] = INVALID_SOCKET;
for (conn = s->active_connections; conn != NULL; conn = tmp_conn) {
tmp_conn = conn->next;
ns_close_conn(conn);
}
#ifdef NS_ENABLE_SSL
if (s->ssl_ctx != NULL) SSL_CTX_free(s->ssl_ctx);
if (s->client_ssl_ctx != NULL) SSL_CTX_free(s->client_ssl_ctx);
#endif
}
// net_skeleton end
#endif // NOEMBED_NET_SKELETON
#include <ctype.h>
#ifdef _WIN32 //////////////// Windows specific defines and includes
#include <io.h> // For _lseeki64
#include <direct.h> // For _mkdir
#ifndef S_ISDIR
#define S_ISDIR(x) ((x) & _S_IFDIR)
#endif
#define sleep(x) Sleep((x) * 1000)
#define stat(x, y) mg_stat((x), (y))
#define fopen(x, y) mg_fopen((x), (y))
#define open(x, y) mg_open((x), (y))
#define lseek(x, y, z) _lseeki64((x), (y), (z))
#define popen(x, y) _popen((x), (y))
#define pclose(x) _pclose(x)
#define mkdir(x, y) _mkdir(x)
#define to64(x) _atoi64(x)
#ifndef __func__
#define STRX(x) #x
#define STR(x) STRX(x)
#define __func__ __FILE__ ":" STR(__LINE__)