X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fserver%2Fserver.c;h=96f06b3feff65095bde1d1697a1c85b8ca806b55;hp=70d9566a3624f4005ff4db85eb223906ab384034;hb=210ff6028480df93f483131d6c6ca1f7f372aa2a;hpb=07dcb5af12b81eec16fd023247d6f723b0206f3d diff --git a/src/server/server.c b/src/server/server.c index 70d9566a36..96f06b3fef 100644 --- a/src/server/server.c +++ b/src/server/server.c @@ -23,12 +23,14 @@ * Free Software Foundation, Inc., * * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ + #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "server.h" #include +#include #include "openocd.h" #include "tcl_server.h" #include "telnet_server.h" @@ -39,11 +41,10 @@ #include #endif - -static struct service *services = NULL; +static struct service *services; /* shutdown_openocd == 1: exit the main event loop, and quit the debugger */ -static int shutdown_openocd = 0; +static int shutdown_openocd; static int add_connection(struct service *service, struct command_context *cmd_ctx) { @@ -62,31 +63,32 @@ static int add_connection(struct service *service, struct command_context *cmd_c c->priv = NULL; c->next = NULL; - if (service->type == CONNECTION_TCP) - { + if (service->type == CONNECTION_TCP) { address_size = sizeof(c->sin); c->fd = accept(service->fd, (struct sockaddr *)&service->sin, &address_size); c->fd_out = c->fd; /* This increases performance dramatically for e.g. GDB load which - * does not have a sliding window protocol. */ - retval = setsockopt(c->fd, /* socket affected */ - IPPROTO_TCP, /* set option at TCP level */ - TCP_NODELAY, /* name of option */ - (char *)&flag, /* the cast is historical cruft */ - sizeof(int)); /* length of option value */ + * does not have a sliding window protocol. + * + * Ignore errors from this fn as it probably just means less performance + */ + setsockopt(c->fd, /* socket affected */ + IPPROTO_TCP, /* set option at TCP level */ + TCP_NODELAY, /* name of option */ + (char *)&flag, /* the cast is historical cruft */ + sizeof(int)); /* length of option value */ LOG_INFO("accepting '%s' connection from %s", service->name, service->port); - if ((retval = service->new_connection(c)) != ERROR_OK) - { + retval = service->new_connection(c); + if (retval != ERROR_OK) { close_socket(c->fd); LOG_ERROR("attempted '%s' connection rejected", service->name); free(c); return retval; } - } else if (service->type == CONNECTION_STDINOUT) - { + } else if (service->type == CONNECTION_STDINOUT) { c->fd = service->fd; c->fd_out = fileno(stdout); @@ -99,30 +101,28 @@ static int add_connection(struct service *service, struct command_context *cmd_c service->fd = -1; LOG_INFO("accepting '%s' connection from pipe", service->name); - if ((retval = service->new_connection(c)) != ERROR_OK) - { + retval = service->new_connection(c); + if (retval != ERROR_OK) { LOG_ERROR("attempted '%s' connection rejected", service->name); free(c); return retval; } - } else if (service->type == CONNECTION_PIPE) - { + } else if (service->type == CONNECTION_PIPE) { c->fd = service->fd; /* do not check for new connections again on stdin */ service->fd = -1; - char * out_file = alloc_printf("%so", service->port); + char *out_file = alloc_printf("%so", service->port); c->fd_out = open(out_file, O_WRONLY); free(out_file); - if (c->fd_out == -1) - { + if (c->fd_out == -1) { LOG_ERROR("could not open %s", service->port); exit(1); } LOG_INFO("accepting '%s' connection from pipe %s", service->name, service->port); - if ((retval = service->new_connection(c)) != ERROR_OK) - { + retval = service->new_connection(c); + if (retval != ERROR_OK) { LOG_ERROR("attempted '%s' connection rejected", service->name); free(c); return retval; @@ -130,7 +130,8 @@ static int add_connection(struct service *service, struct command_context *cmd_c } /* add to the end of linked list */ - for (p = &service->connections; *p; p = &(*p)->next); + for (p = &service->connections; *p; p = &(*p)->next) + ; *p = c; service->max_connections--; @@ -144,16 +145,12 @@ static int remove_connection(struct service *service, struct connection *connect struct connection *c; /* find connection */ - while ((c = *p)) - { - if (c->fd == connection->fd) - { + while ((c = *p)) { + if (c->fd == connection->fd) { service->connection_closed(c); if (service->type == CONNECTION_TCP) - { close_socket(c->fd); - } else if (service->type == CONNECTION_PIPE) - { + else if (service->type == CONNECTION_PIPE) { /* The service will listen to the pipe again */ c->service->fd = c->fd; } @@ -176,7 +173,13 @@ static int remove_connection(struct service *service, struct connection *connect } /* FIX! make service return error instead of invoking exit() */ -int add_service(char *name, const char *port, int max_connections, new_connection_handler_t new_connection_handler, input_handler_t input_handler, connection_closed_handler_t connection_closed_handler, void *priv) +int add_service(char *name, + const char *port, + int max_connections, + new_connection_handler_t new_connection_handler, + input_handler_t input_handler, + connection_closed_handler_t connection_closed_handler, + void *priv) { struct service *c, **p; int so_reuseaddr_option = 1; @@ -185,7 +188,7 @@ int add_service(char *name, const char *port, int max_connections, new_connectio c->name = strdup(name); c->port = strdup(port); - c->max_connections = 1; /* Only TCP/IP ports can support more than one connection */ + c->max_connections = 1; /* Only TCP/IP ports can support more than one connection */ c->fd = -1; c->connections = NULL; c->new_connection = new_connection_handler; @@ -195,33 +198,31 @@ int add_service(char *name, const char *port, int max_connections, new_connectio c->next = NULL; long portnumber; if (strcmp(c->port, "pipe") == 0) - { c->type = CONNECTION_STDINOUT; - } else - { + else { char *end; portnumber = strtol(c->port, &end, 0); - if (!*end && (parse_long(c->port, &portnumber) == ERROR_OK)) - { + if (!*end && (parse_long(c->port, &portnumber) == ERROR_OK)) { c->portnumber = portnumber; c->type = CONNECTION_TCP; } else - { c->type = CONNECTION_PIPE; - } } - if (c->type == CONNECTION_TCP) - { + if (c->type == CONNECTION_TCP) { c->max_connections = max_connections; - if ((c->fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) - { + c->fd = socket(AF_INET, SOCK_STREAM, 0); + if (c->fd == -1) { LOG_ERROR("error creating socket: %s", strerror(errno)); exit(-1); } - setsockopt(c->fd, SOL_SOCKET, SO_REUSEADDR, (void*)&so_reuseaddr_option, sizeof(int)); + setsockopt(c->fd, + SOL_SOCKET, + SO_REUSEADDR, + (void *)&so_reuseaddr_option, + sizeof(int)); socket_nonblock(c->fd); @@ -230,8 +231,7 @@ int add_service(char *name, const char *port, int max_connections, new_connectio c->sin.sin_addr.s_addr = INADDR_ANY; c->sin.sin_port = htons(c->portnumber); - if (bind(c->fd, (struct sockaddr *)&c->sin, sizeof(c->sin)) == -1) - { + if (bind(c->fd, (struct sockaddr *)&c->sin, sizeof(c->sin)) == -1) { LOG_ERROR("couldn't bind to socket: %s", strerror(errno)); exit(-1); } @@ -249,14 +249,11 @@ int add_service(char *name, const char *port, int max_connections, new_connectio setsockopt(c->fd, SOL_SOCKET, SO_RCVBUF, (char *)&window_size, sizeof(window_size)); - if (listen(c->fd, 1) == -1) - { + if (listen(c->fd, 1) == -1) { LOG_ERROR("couldn't listen on socket: %s", strerror(errno)); exit(-1); } - } - else if (c->type == CONNECTION_STDINOUT) - { + } else if (c->type == CONNECTION_STDINOUT) { c->fd = fileno(stdin); #ifdef _WIN32 @@ -270,9 +267,7 @@ int add_service(char *name, const char *port, int max_connections, new_connectio #else socket_nonblock(c->fd); #endif - } - else if (c->type == CONNECTION_PIPE) - { + } else if (c->type == CONNECTION_PIPE) { #ifdef _WIN32 /* we currenty do not support named pipes under win32 * so exit openocd for now */ @@ -281,8 +276,7 @@ int add_service(char *name, const char *port, int max_connections, new_connectio #else /* Pipe we're reading from */ c->fd = open(c->port, O_RDONLY | O_NONBLOCK); - if (c->fd == -1) - { + if (c->fd == -1) { LOG_ERROR("could not open %s", c->port); exit(1); } @@ -290,7 +284,8 @@ int add_service(char *name, const char *port, int max_connections, new_connectio } /* add to the end of linked list */ - for (p = &services; *p; p = &(*p)->next); + for (p = &services; *p; p = &(*p)->next) + ; *p = c; return ERROR_OK; @@ -301,15 +296,13 @@ static int remove_services(void) struct service *c = services; /* loop service */ - while (c) - { + while (c) { struct service *next = c->next; if (c->name) - free(c->name); + free((void *)c->name); - if (c->type == CONNECTION_PIPE) - { + if (c->type == CONNECTION_PIPE) { if (c->fd != -1) close(c->fd); } @@ -349,17 +342,14 @@ int server_loop(struct command_context *command_context) LOG_ERROR("couldn't set SIGPIPE to SIG_IGN"); #endif - while (!shutdown_openocd) - { + while (!shutdown_openocd) { /* monitor sockets for activity */ fd_max = 0; FD_ZERO(&read_fds); /* add service and connection fds to read_fds */ - for (service = services; service; service = service->next) - { - if (service->fd != -1) - { + for (service = services; service; service = service->next) { + if (service->fd != -1) { /* listen for new connections */ FD_SET(service->fd, &read_fds); @@ -367,12 +357,10 @@ int server_loop(struct command_context *command_context) fd_max = service->fd; } - if (service->connections) - { + if (service->connections) { struct connection *c; - for (c = service->connections; c; c = c->next) - { + for (c = service->connections; c; c = c->next) { /* check for activity on the connection */ FD_SET(c->fd, &read_fds); if (c->fd > fd_max) @@ -383,14 +371,12 @@ int server_loop(struct command_context *command_context) struct timeval tv; tv.tv_sec = 0; - if (poll_ok) - { + if (poll_ok) { /* we're just polling this iteration, this is faster on embedded * hosts */ tv.tv_usec = 0; retval = socket_select(fd_max + 1, &read_fds, NULL, NULL, &tv); - } else - { + } else { /* Every 100ms */ tv.tv_usec = 100000; /* Only while we're sleeping we'll let others run */ @@ -400,92 +386,90 @@ int server_loop(struct command_context *command_context) openocd_sleep_postlude(); } - if (retval == -1) - { + if (retval == -1) { #ifdef _WIN32 errno = WSAGetLastError(); if (errno == WSAEINTR) FD_ZERO(&read_fds); - else - { + else { LOG_ERROR("error during select: %s", strerror(errno)); exit(-1); } #else if (errno == EINTR) - { FD_ZERO(&read_fds); - } - else - { + else { LOG_ERROR("error during select: %s", strerror(errno)); exit(-1); } #endif } - if (retval == 0) - { - /* We only execute these callbacks when there was nothing to do or we timed out */ + if (retval == 0) { + /* We only execute these callbacks when there was nothing to do or we timed + *out */ target_call_timer_callbacks(); process_jim_events(command_context); - FD_ZERO(&read_fds); /* eCos leaves read_fds unchanged in this case! */ + FD_ZERO(&read_fds); /* eCos leaves read_fds unchanged in this case! */ - /* We timed out/there was nothing to do, timeout rather than poll next time */ + /* We timed out/there was nothing to do, timeout rather than poll next time + **/ poll_ok = false; - } else - { + } else { /* There was something to do, next time we'll just poll */ poll_ok = true; } - for (service = services; service; service = service->next) - { + /* This is a simple back-off algorithm where we immediately + * re-poll if we did something this time around. + * + * This greatly improves performance of DCC. + */ + poll_ok = poll_ok || target_got_message(); + + for (service = services; service; service = service->next) { /* handle new connections on listeners */ if ((service->fd != -1) - && (FD_ISSET(service->fd, &read_fds))) - { + && (FD_ISSET(service->fd, &read_fds))) { if (service->max_connections > 0) - { add_connection(service, command_context); - } - else - { - if (service->type == CONNECTION_TCP) - { + else { + if (service->type == CONNECTION_TCP) { struct sockaddr_in sin; socklen_t address_size = sizeof(sin); int tmp_fd; - tmp_fd = accept(service->fd, (struct sockaddr *)&service->sin, &address_size); + tmp_fd = accept(service->fd, + (struct sockaddr *)&service->sin, + &address_size); close_socket(tmp_fd); } - LOG_INFO("rejected '%s' connection, no more connections allowed", service->name); + LOG_INFO( + "rejected '%s' connection, no more connections allowed", + service->name); } } /* handle activity on connections */ - if (service->connections) - { + if (service->connections) { struct connection *c; - for (c = service->connections; c;) - { - if ((FD_ISSET(c->fd, &read_fds)) || c->input_pending) - { - if ((retval = service->input(c)) != ERROR_OK) - { + for (c = service->connections; c; ) { + if ((FD_ISSET(c->fd, &read_fds)) || c->input_pending) { + retval = service->input(c); + if (retval != ERROR_OK) { struct connection *next = c->next; - if (service->type == CONNECTION_PIPE) - { - /* if connection uses a pipe then shutdown openocd on error */ + if (service->type == CONNECTION_PIPE) { + /* if connection uses a pipe then + *shutdown openocd on error */ shutdown_openocd = 1; } remove_connection(service, c); - LOG_INFO("dropped '%s' connection", service->name); + LOG_INFO("dropped '%s' connection", + service->name); c = next; continue; } @@ -497,8 +481,7 @@ int server_loop(struct command_context *command_context) #ifdef _WIN32 MSG msg; - while (PeekMessage(&msg,NULL,0,0,PM_REMOVE)) - { + while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) { if (msg.message == WM_QUIT) shutdown_openocd = 1; } @@ -515,7 +498,8 @@ BOOL WINAPI ControlHandler(DWORD dwCtrlType) return TRUE; } -void sig_handler(int sig) { +void sig_handler(int sig) +{ shutdown_openocd = 1; } #endif @@ -532,8 +516,7 @@ int server_preinit(void) wVersionRequested = MAKEWORD(2, 2); - if (WSAStartup(wVersionRequested, &wsaData) != 0) - { + if (WSAStartup(wVersionRequested, &wsaData) != 0) { LOG_ERROR("Failed to Open Winsock"); exit(-1); } @@ -573,29 +556,22 @@ int server_quit(void) int connection_write(struct connection *connection, const void *data, int len) { - if (len == 0) - { + if (len == 0) { /* successful no-op. Sockets and pipes behave differently here... */ return 0; } if (connection->service->type == CONNECTION_TCP) - { return write_socket(connection->fd_out, data, len); - } else - { + else return write(connection->fd_out, data, len); - } } int connection_read(struct connection *connection, void *data, int len) { if (connection->service->type == CONNECTION_TCP) - { return read_socket(connection->fd, data, len); - } else - { + else return read(connection->fd, data, len); - } } /* tell the server we want to shut down */ @@ -613,6 +589,7 @@ static const struct command_registration server_command_handlers[] = { .name = "shutdown", .handler = &handle_shutdown_command, .mode = COMMAND_ANY, + .usage = "", .help = "shut the server down", }, COMMAND_REGISTRATION_DONE @@ -634,18 +611,18 @@ int server_register_commands(struct command_context *cmd_ctx) SERVER_PORT_COMMAND() { switch (CMD_ARGC) { - case 0: - command_print(CMD_CTX, "%d", *out); - break; - case 1: - { - uint16_t port; - COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], port); - *out = port; - break; - } - default: - return ERROR_INVALID_ARGUMENTS; + case 0: + command_print(CMD_CTX, "%d", *out); + break; + case 1: + { + uint16_t port; + COMMAND_PARSE_NUMBER(u16, CMD_ARGV[0], port); + *out = port; + break; + } + default: + return ERROR_COMMAND_SYNTAX_ERROR; } return ERROR_OK; } @@ -653,19 +630,22 @@ SERVER_PORT_COMMAND() SERVER_PIPE_COMMAND() { switch (CMD_ARGC) { - case 0: - command_print(CMD_CTX, "%s", *out); - break; - case 1: - { - const char * t = strdup(CMD_ARGV[0]); - free((void *)*out); - *out = t; - break; - } - default: - return ERROR_INVALID_ARGUMENTS; + case 0: + command_print(CMD_CTX, "%s", *out); + break; + case 1: + { + if (CMD_CTX->mode == COMMAND_EXEC) { + LOG_WARNING("unable to change server port after init"); + return ERROR_COMMAND_ARGUMENT_INVALID; + } + const char *t = strdup(CMD_ARGV[0]); + free((void *)*out); + *out = t; + break; + } + default: + return ERROR_COMMAND_SYNTAX_ERROR; } return ERROR_OK; } -