X-Git-Url: http://developer.intra2net.com/git/?p=libt2n;a=blobdiff_plain;f=src%2Fsocket_server.cpp;h=0eff67623fdb5d9463f40ebd8f2af96db4175b28;hp=f94d9598671147d6f13f02cef30b98858929fff6;hb=45a2ebc9695c4d7be6548b7e0f800d117ae56a0b;hpb=ac7fdc22899c0c493fda5fdb3a4cb67e77504a6b diff --git a/src/socket_server.cpp b/src/socket_server.cpp index f94d959..0eff676 100644 --- a/src/socket_server.cpp +++ b/src/socket_server.cpp @@ -17,72 +17,256 @@ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + #include "socket_server.hxx" +#include "t2n_exception.hxx" +#include "log.hxx" + +using namespace std; namespace libt2n { -socket_server::socket_server(int port, const char* ip) - : server() +/** @brief create a new tcp-based server + @param port tcp port you want to listen on + @param ip the local ip you want to listen on. "0.0.0.0" means all local ips (default). +*/ +socket_server::socket_server(int port, const std::string& ip) + : server(), socket_handler(0,tcp_s) { - type=tcp; + /* Create the socket. */ + sock = socket (PF_INET, SOCK_STREAM, 0); + if (sock < 0) + EXCEPTIONSTREAM(error,t2n_server_error,"error opening socket: " << strerror(errno)); + + set_socket_options(sock); + + /* Give the socket a name. */ + struct sockaddr_in sockaddr; + sockaddr.sin_family = AF_INET; + sockaddr.sin_port = htons(port); + if (inet_aton(ip.c_str(),&sockaddr.sin_addr) == 0) + EXCEPTIONSTREAM(error,t2n_server_error,"failed listening on invalid ip " << ip); + + if (bind (sock, (struct sockaddr *) &sockaddr, sizeof (sockaddr)) < 0) + EXCEPTIONSTREAM(error,t2n_server_error,"error binding socket: " << strerror(errno)); + + start_listening(); } -socket_server::socket_server(const char* path, mode_t chmod, const char* user, const char* group) - : server() +/** @brief create a new unix-socked-based server + @param path path of the socket + @param filemode permissions you want to open the socket with + @param user local username for the socket + @param group local groupname for the socket +*/ +socket_server::socket_server(const std::string& path, mode_t filemode, const std::string& user, const std::string& group) + : server(), socket_handler(0,unix_s) { - type=unix; unix_path=path; + /* Create the socket. */ + sock = socket (PF_UNIX, SOCK_STREAM, 0); + if (sock < 0) + EXCEPTIONSTREAM(error,t2n_server_error,"error opening socket: " << strerror(errno)); + + set_socket_options(sock); + + /* Give the socket a name. */ struct sockaddr_un unix_name; + unix_name.sun_family = AF_UNIX; + strncpy (unix_name.sun_path, unix_path.c_str(),sizeof(unix_name.sun_path)); - /* Create the socket. */ - socket = socket (PF_UNIX, SOCK_STREAM, 0); - if (socket < 0) + /* just to make sure there is no other socket file */ + unlink (unix_name.sun_path); + + if (bind (sock, (struct sockaddr *) &unix_name, sizeof (unix_name)) < 0) + EXCEPTIONSTREAM(error,t2n_server_error,"error binding socket: " << strerror(errno)); + + /* change permissions */ + if (chmod (unix_name.sun_path, filemode) != 0) + EXCEPTIONSTREAM(error,t2n_server_error,"error changing permission: " << strerror(errno)); + + if (!user.empty() && !group.empty()) { - string err="error opening socket: "; - err+=::strerror(errno); + // TODO maybe use current user/group if one of them is empty -// throw EXCEPTION(network_server_error,err); + struct passwd *socket_user = getpwnam (user.c_str()); + if (socket_user == NULL) + EXCEPTIONSTREAM(error,t2n_server_error,"error getting socket user: " << strerror(errno)); + + struct group *socket_group = getgrnam (group.c_str()); + if (socket_group == NULL) + EXCEPTIONSTREAM(error,t2n_server_error,"error getting socket group: " << strerror(errno)); + + if (chown (unix_name.sun_path, socket_user->pw_uid, socket_group->gr_gid) != 0) + EXCEPTIONSTREAM(error,t2n_server_error,"error changing socket ownership: " << strerror(errno)); } + start_listening(); } socket_server::~socket_server() { - close(socket); + socket_handler::close(); - if (type==unix) + if (get_type()==unix_s) unlink(unix_path.c_str()); } +/// start listening on a new server socket (called by the constructors) +void socket_server::start_listening() +{ + if (listen (sock, 5) < 0) + EXCEPTIONSTREAM(error,t2n_server_error,"error listening to socket: " << strerror(errno)); + /* clear & insert server sock into the fd_tab to prepare select */ + FD_ZERO(&connection_set); + FD_SET (sock, &connection_set); +} -void socket_server::fill_buffer(long long usec_timeout) +/// handle a new connection from a client +void socket_server::new_connection() { + struct sockaddr_un clientname; + + unsigned int size = sizeof (clientname); + int newsock = accept (sock,(struct sockaddr *) &clientname,&size); + if (newsock < 0) + { + if (errno == EAGAIN) + { + LOGSTREAM(error,"accept error (EAGAIN): no connection waiting"); + return; + } + + /* default: break */ + EXCEPTIONSTREAM(error,t2n_server_error,"error accepting connection: " << strerror(errno)); + } + + FD_SET (newsock, &connection_set); + socket_server_connection *nc=new socket_server_connection(newsock, get_type(), get_default_timeout()); + nc->set_socket_options(newsock); + + add_connection(nc); + + return; } -socket_connection::socket_connection(int _socket, int _timeout) - : connection(_timeout) +/** @brief look for new connections and new data in any of the existing connections + @param usec_timeout wait until new data is found, max timeout usecs. + -1: wait endless + 0: return instantly + @param usec_timeout_remaining if non-NULL the function will write the + not used time to the given target + @retval true if new data was found (does not mean that the received data + is a complete packet though) +*/ +bool socket_server::fill_buffer(long long usec_timeout,long long* usec_timeout_remaining) { + fd_set used_fdset=connection_set; + + /* set timeout */ + struct timeval tval; + struct timeval *timeout_ptr; + + if (usec_timeout == -1) + timeout_ptr = NULL; + else + { + timeout_ptr = &tval; + + // timeout von long long usec in int sec + int usec umrechnen + tval.tv_sec = usec_timeout / 1000000; + tval.tv_usec = usec_timeout % 1000000; + } + + int ret=select (FD_SETSIZE, &used_fdset, NULL, NULL, timeout_ptr); + + // return the timeout we did not use + if (usec_timeout > 0 && usec_timeout_remaining != NULL) + *usec_timeout_remaining=(tval.tv_sec*1000000)+tval.tv_usec; + + if (ret < 0) + { + if (errno == EINTR) + { + // select interrupted by signal + ret=0; + } + else + EXCEPTIONSTREAM(error,t2n_server_error,"select error: " << strerror(errno)); + } + if (ret > 0) + { + // we have data pending + + // check for new connection + if (FD_ISSET (sock, &used_fdset)) + { + new_connection(); + } + + // check all connections for pending data + return fill_connection_buffers(); + } + + return false; } -void socket_connection::close() +/// call fill_buffer() on all connections, called from fill_buffer() +bool socket_server::fill_connection_buffers() { + bool data_found; + + std::map::iterator ie=connections.end(); + for(std::map::iterator i=connections.begin(); i != ie; i++) + if (!i->second->server_connection::is_closed()) + if (i->second->fill_buffer(0)) + data_found=true; + return data_found; } -void socket_connection::fill_buffer(void) +/// remove the socket of a connection after the connection has been closed +void socket_server::remove_connection_socket(int sock) { - + FD_CLR(sock, &connection_set); } -void socket_connection::write(const std::string& data) +/// close this connection. complete data waiting in the buffer can still be retrieved. +void socket_server_connection::close() { + if (!server_connection::is_closed()) + { + socket_handler::close(); + server_connection::close(); + } + if (my_server) + { + dynamic_cast(my_server)->remove_connection_socket(sock); + } } }