diff options
Diffstat (limited to 'libs/lucittpd/src/main.c')
-rw-r--r-- | libs/lucittpd/src/main.c | 333 |
1 files changed, 333 insertions, 0 deletions
diff --git a/libs/lucittpd/src/main.c b/libs/lucittpd/src/main.c new file mode 100644 index 000000000..3ee5506a8 --- /dev/null +++ b/libs/lucittpd/src/main.c @@ -0,0 +1,333 @@ +/* + * This program 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 2 of the License, or + * (at your option) any later version. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. + * + * Copyright (C) 2008 John Crispin <blogic@openwrt.org> + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <netinet/tcp.h> +#include <netdb.h> +#include <arpa/inet.h> +#include <sys/wait.h> +#include <signal.h> +#include <features.h> + +#include <lib/uci.h> +#include <lib/log.h> +#include <lib/signal.h> +#include <lib/luaplugin.h> + +#ifndef __UCLIBC__ +#include <sys/sendfile.h> +#endif + +#define BACKLOG 10 + +static int port = 0; +static const char *plugin_path = NULL; +static struct luaplugin_ctx ctx; +static struct luaplugin_entry *e; +static struct timeval timeout; + +static void load_config(void) +{ + timeout.tv_usec = 0; + + static struct uci_context* uci = 0; + uci = ucix_init("lucittpd"); + if(uci) + { + plugin_path = ucix_get_option(uci, "lucittpd", "lucittpd", "path"); + port = ucix_get_option_int(uci, "lucittpd", "lucittpd", "port", 80); + timeout.tv_sec = ucix_get_option_int(uci, "lucittpd", "lucittpd", "timeout", 90); + } else { + port = 8080; + timeout.tv_sec = 90; + } + if(!plugin_path) + plugin_path = strdup("/usr/lib/lucittpd/plugins/"); + + // ToDo: Check why below command segfaults in uci_free_context + //ucix_cleanup(uci); +} + +static int webuci_read(lua_State *L) +{ + int len = luaL_checkinteger(L, 1); + if (len <= 0) { + return luaL_argerror(L, 1, "too low"); + } + + char *buffer = malloc(len); + if (!buffer) { + return luaL_error(L, "malloc() failed"); + } + + int sockfd = lua_tointeger(L, lua_upvalueindex(1)); + + len = read(sockfd, buffer, len); + if (len > 0) { + lua_pushlstring(L, buffer, len); + free(buffer); + } else { + free(buffer); + lua_pushnil(L); + lua_pushinteger(L, (len == 0) ? 0 : errno); + return 2; + } + + /* fprintf(stderr, "%s:%s[%d] %d %d\n", __FILE__, __func__, __LINE__, sockfd, len); */ + + return 1; +} + +static int webuci_close(lua_State *L) +{ + int sockfd = lua_tointeger(L, lua_upvalueindex(1)); + int result = shutdown(sockfd, SHUT_RDWR); + close(sockfd); + /*log_printf("%s:%s[%d] %d %d\n", __FILE__, __func__, __LINE__, sockfd, result);*/ + + if (result < 0) { + lua_pushnil(L); + lua_pushinteger(L, errno); + return 2; + } else { + lua_pushboolean(L, 1); + return 1; + } +} + +static int webuci_write(lua_State *L) +{ + luaL_checktype(L, 1, LUA_TSTRING); + + size_t len; + const char *data = lua_tolstring(L, 1, &len); + int sockfd = lua_tointeger(L, lua_upvalueindex(1)); + + len = send(sockfd, data, len, 0); + /*log_printf("%s:%s[%d] %d %d - %s\n", __FILE__, __func__, __LINE__, sockfd, len, data);*/ + if (len < 0) { + lua_pushnil(L); + lua_pushinteger(L, errno); + return 2; + } else { + lua_pushinteger(L, len); + return 1; + } +} + +static int webuci_sendfile(lua_State *L) +{ + FILE **fp = (FILE **)luaL_checkudata(L, 1, LUA_FILEHANDLE); + if (*fp == NULL) { + return luaL_error(L, "attempt to use a closed file"); + } + + off_t offset = luaL_checkinteger(L, 2); + size_t size = luaL_checkinteger(L, 3); + + int sockfd = lua_tointeger(L, lua_upvalueindex(1)); + + int cork = 1; + setsockopt(sockfd, SOL_TCP, TCP_CORK, &cork, sizeof(cork)); + +#ifdef __UCLIBC__ + // uclibc is teh sux, it does not implement sendfile correctly + char tmp[1024]; + size_t c, toread = size, oldpos = ftell(*fp); + + fseek(*fp, offset, SEEK_SET); + + while(toread > 0 && (c = fread(tmp, 1, (toread < 1024) ? toread : 1024, *fp)) > 0) + { + size += c; + toread -= c; + write(sockfd, tmp, c); + } + + fseek(*fp, oldpos, SEEK_SET); +#else + size = sendfile(sockfd, fileno(*fp), &offset, size); + /*log_printf("%s:%s[%d] %d %d - %d\n", __FILE__, __func__, __LINE__, sockfd, fileno(*fp), size);*/ +#endif + + cork = 0; + setsockopt(sockfd, SOL_TCP, TCP_CORK, &cork, sizeof(cork)); + + if (size < 1) { + lua_pushnil(L); + lua_pushinteger(L, errno); + } else { + lua_pushinteger(L, size); + lua_pushinteger(L, offset); + } + + return 2; +} + + +static void load_luci(const char *plugindir) +{ + luaplugin_init(&ctx, plugindir); + luaplugin_scan(&ctx); + + list_for_each_entry(e, &ctx.entries, list) + { + lua_pushstring(ctx.L, "initialize"); + luaplugin_call(e, 0); + } + + list_for_each_entry(e, &ctx.entries, list) + { + lua_pushstring(ctx.L, "register"); + luaplugin_call(e, 0); + } + + list_for_each_entry(e, &ctx.entries, list) + { + lua_pushstring(ctx.L, "filter"); + luaplugin_call(e, 0); + } +} + +static void run_luci(int sockfd) +{ + lua_pushinteger(ctx.L, sockfd); + lua_pushcclosure(ctx.L, webuci_read, 1); + lua_setfield(ctx.L, LUA_GLOBALSINDEX, "webuci_read"); + + lua_pushinteger(ctx.L, sockfd); + lua_pushcclosure(ctx.L, webuci_write, 1); + lua_setfield(ctx.L, LUA_GLOBALSINDEX, "webuci_write"); + + lua_pushinteger(ctx.L, sockfd); + lua_pushcclosure(ctx.L, webuci_close, 1); + lua_setfield(ctx.L, LUA_GLOBALSINDEX, "webuci_close"); + + lua_pushinteger(ctx.L, sockfd); + lua_pushcclosure(ctx.L, webuci_sendfile, 1); + lua_setfield(ctx.L, LUA_GLOBALSINDEX, "webuci_sendfile"); + + list_for_each_entry(e, &ctx.entries, list) + { + lua_pushstring(ctx.L, "accept"); + luaplugin_call(e, 0); + } +} + +static void cleanup_luci(void) +{ + luaplugin_done(&ctx); +} + +int main(int argc, char **argv) +{ + int sockfd, new_fd; + struct sockaddr_storage their_addr; + socklen_t sin_size; + int yes = 1; + struct sockaddr_in myaddr; + + log_start(1); + + load_config(); + + setup_signals(); + + /* used by sdk to override plugin dir */ + if(argc != 2) + { + load_luci(plugin_path); + } else { + load_luci(argv[1]); + port = 8080; + } + + myaddr.sin_family = AF_INET; + myaddr.sin_port = htons(port); + //inet_pton(AF_INET, "63.161.169.137", &myaddr.sin_addr.s_addr); + myaddr.sin_addr.s_addr = INADDR_ANY; + + sockfd = socket(PF_INET, SOCK_STREAM, 0); + + if(sockfd == -1) + { + perror("server: socket"); + exit(1); + } + + if(setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(int)) == -1) + { + perror("setsockopt"); + exit(1); + } + + if(bind(sockfd, (struct sockaddr *)&myaddr, sizeof(myaddr)) == -1) + { + close(sockfd); + perror("server: bind"); + exit(1); + } + + if(listen(sockfd, BACKLOG) == -1) + { + perror("listen"); + exit(1); + } + + /*log_printf("server: waiting for connections...\n");*/ + + while(1) + { + sin_size = sizeof their_addr; + new_fd = accept(sockfd, (struct sockaddr *)&their_addr, &sin_size); + if(new_fd == -1) + { + perror("accept"); + continue; + } + + /*inet_ntop(their_addr.ss_family, + (void*)&((struct sockaddr_in*)&their_addr)->sin_addr, s, sizeof s); + log_printf("server: got connection from %s\n", s);*/ + + if(!fork()) + { + /* child */ + close(sockfd); + + setsockopt(new_fd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof(timeout)); + setsockopt(new_fd, SOL_SOCKET, SO_SNDTIMEO, &timeout, sizeof(timeout)); + + run_luci(new_fd); + cleanup_luci(); + close(new_fd); + + exit(0); + } + close(new_fd); + } + + return 0; +} |