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-rw-r--r--echld/dispatcher.c1077
1 files changed, 0 insertions, 1077 deletions
diff --git a/echld/dispatcher.c b/echld/dispatcher.c
deleted file mode 100644
index eb749d9b27..0000000000
--- a/echld/dispatcher.c
+++ /dev/null
@@ -1,1077 +0,0 @@
-/* echld_dispatcher.c
- * epan working child API internals
- * Dispatcher process routines and definitions
- *
- * Wireshark - Network traffic analyzer
- * By Gerald Combs <gerald@wireshark.org>
- * Copyright 1998 Gerald Combs
- *
- * Copyright (c) 2013 by Luis Ontanon <luis@ontanon.org>
- *
- * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "echld-int.h"
-/**
- DISPATCHER
- **/
-
-struct dispatcher_child {
- echld_chld_id_t chld_id;
- child_state_t state;
- echld_reader_t reader;
- int write_fd;
- int pid;
- int reqh_id;
- gboolean closing;
-};
-
-struct dispatcher {
- int parent_out;
- echld_reader_t parent_in;
- struct dispatcher_child* children;
- int max_children;
- int nchildren;
- int reqh_id;
- int pid;
- int ppid;
- struct _encs {
- child_encoder_t* to_parent;
- echld_parent_encoder_t* to_child;
- } enc;
- struct _decs {
- child_decoder_t* from_parent;
- parent_decoder_t* from_child;
- } dec;
-
- int dumpcap_pid;
- gboolean closing;
- capture_options capture_opts;
-};
-
-struct dispatcher* dispatcher;
-
-#ifdef DEBUG_DISPATCHER
-static int debug_lvl = DEBUG_DISPATCHER;
-static FILE* debug_fp = NULL;
-
-#define DCOM() /*echld_common_set_dbg(debug_lvl,debug_fp,"Disp")*/
-
-int dispatcher_debug(int level, const char* fmt, ...) {
- va_list ap;
- char* str;
-
- if (debug_lvl<level) return 1;
-
- va_start(ap, fmt);
- str = g_strdup_vprintf(fmt,ap);
- va_end(ap);
-
- if (dispatcher) {
- fprintf(debug_fp, "dispatcher[%d]: reqh_id=%d dbg_level=%d message='%s'\n", dispatcher->pid, dispatcher->reqh_id, level, str);
- } else {
- fprintf(debug_fp, "dispatcher: dbg_level=%d message='%s'\n", level, str);
- }
-
- fflush(debug_fp);
-
- g_free(str);
-
- return 1;
-}
-
-
-static char* param_get_dbg_level(char** err _U_) {
- return g_strdup_printf("%d",debug_lvl);
-}
-
-static echld_bool_t param_set_dbg_level(char* val , char** err ) {
- char* p;
- int lvl = (int)strtol(val, &p, 10);
-
- if (p<=val) {
- *err = g_strdup("not an integer");
- return FALSE;
- } else if (lvl < 0 || lvl > 5) {
- *err = g_strdup_printf("invalid level=%d (min=0 max=5)",lvl);
- return FALSE;
- }
-
- debug_lvl = lvl;
- DCOM();
- return TRUE;
-}
-
-static long dbg_r = 0;
-
-#define DISP_DBG(attrs) ( dispatcher_debug attrs )
-#define DISP_DBG_INIT() do { debug_fp = stderr; DCOM(); } while(0)
-#define DISP_DBG_START(fname) do { debug_fp = ws_fopen(fname,"a"); DCOM(); DISP_DBG((0,"Log Started")); } while(0)
-#define DISP_WRITE(FD,BA,CH,T,RH) ( dbg_r = echld_write_frame(FD,BA,CH,T,RH,NULL), DISP_DBG((1,"SND fd=%d ch=%d ty='%s' rh=%d msg='%s'",FD,CH,TY(T),RH, (dbg_r>0?"ok":g_strerror(errno)))))
-#define CHLD_SET_STATE(c,st) do { DISP_DBG((1,"Child[%d] State %s => %s",(c)->chld_id, ST((c)->state), ST((st)) )); (c)->state=(st); } while(0)
-#else
-#define DISP_DBG(attrs)
-#define DISP_DBG_INIT()
-#define DISP_DBG_START(fname)
-#define DISP_WRITE(FD,BA,CH,T,RH) echld_write_frame(FD,BA,CH,T,RH,NULL)
-#define CHLD_SET_STATE(c,st) ((c)->state = (st))
-#endif
-
-#define DISP_RESP(B,T) (DISP_WRITE( dispatcher->parent_out, (B), 0, (T), dispatcher->reqh_id))
-
-
-
-static echld_epan_stuff_t stuff;
-
-static void init_stuff(void) {
-#ifdef HAVE_LIBPCAP
- capture_opts_init(&stuff.cap_opts);
- capture_session_init(&stuff.cap_sess, &stuff.cfile);
-#endif
-
-}
-
-static void children_massacre(void) {
- int i;
- struct dispatcher_child* cc = dispatcher->children;
- int max_children = dispatcher->max_children;
-
- for(i = 0; i < max_children; i++) {
- struct dispatcher_child* c = &(cc[i]);
- if (c->pid > 0) {
- DISP_DBG((0,"killing ch=%d pid=%d",c->chld_id,c->pid));
- kill(c->pid,SIGTERM);
- }
- }
-}
-
-
-#define ERR_STR_LEN 1024
-static void dispatcher_fatal(int cause, const char* fmt, ...) {
- gchar err_str[ERR_STR_LEN];
- va_list ap;
-
- va_start(ap, fmt);
- g_vsnprintf(err_str, ERR_STR_LEN, fmt,ap);
- va_end(ap);
-
- DISP_DBG((0,"fatal cause=%d msg=\"%s\"",cause ,err_str));
-
- children_massacre();
-
- exit(cause);
-}
-
-#define DISP_FATAL(attrs) dispatcher_fatal attrs
-
-static void dispatcher_err(int errnum, const char* fmt, ...) {
- gchar err_str[ERR_STR_LEN];
- va_list ap;
- static GByteArray* ba;
-
- va_start(ap, fmt);
- g_vsnprintf(err_str, ERR_STR_LEN, fmt,ap);
- va_end(ap);
-
- DISP_DBG((0,"error=\"%s\"",err_str));
-
- ba = dispatcher->enc.to_parent->error(errnum, err_str);
- DISP_RESP(ba,ECHLD_ERROR);
- g_byte_array_free(ba,TRUE);
-}
-
-/* parameters */
-
-/* interface listing */
-
-static char* intflist2json(GList* if_list, char** if_cap_err) {
-#define ADDRSTRLEN 46 /* Covers IPv4 & IPv6 */
-
- GList *if_entry;
- if_info_t *if_info;
- GSList *addr;
- if_addr_t *if_addr;
- if_capabilities_t *caps;
- char addr_str[ADDRSTRLEN];
- GString *str = g_string_new("{ what='interfaces', interfaces={ \n");
-
- for (if_entry = g_list_first(if_list); if_entry != NULL;
- if_entry = g_list_next(if_entry)) {
- if_info = (if_info_t *)if_entry->data;
- g_string_append_printf(str," %s={ intf='%s',", if_info->name, if_info->name);
-
- /*
- * Print the contents of the if_entry struct in a parseable format.
- * Each if_entry element is tab-separated. Addresses are comma-
- * separated.
- */
- /* XXX - Make sure our description doesn't contain a tab */
- if (if_info->vendor_description != NULL)
- g_string_append_printf(str," vnd_desc='%s',", if_info->vendor_description);
-
- /* XXX - Make sure our friendly name doesn't contain a tab */
- if (if_info->friendly_name != NULL)
- g_string_append_printf(str," name='%s', addrs=[ ", if_info->friendly_name);
-
- for (addr = g_slist_nth(if_info->addrs, 0); addr != NULL;
- addr = g_slist_next(addr)) {
-
- if_addr = (if_addr_t *)addr->data;
- switch(if_addr->ifat_type) {
- case IF_AT_IPv4:
- if (inet_ntop(AF_INET, &if_addr->addr.ip4_addr, addr_str,
- ADDRSTRLEN)) {
- g_string_append_printf(str,"'%s',", addr_str);
- } else {
- g_string_append(str,"'<unknown IPv4>',");
- }
- break;
- case IF_AT_IPv6:
- if (inet_ntop(AF_INET6, &if_addr->addr.ip6_addr,
- addr_str, ADDRSTRLEN)) {
- g_string_append_printf(str,"'%s',", addr_str);
- } else {
- g_string_append(str,"'<unknown IPv6>',");
- }
- break;
- default:
- g_string_append_printf(str,"'<type unknown %u>',", if_addr->ifat_type);
- }
-
- }
-
- g_string_truncate(str,str->len - 1); /* the last comma or space (on empty list) */
- g_string_append(str," ]"); /* addrs */
-
-
- if (if_info->loopback)
- g_string_append(str,", loopback=1");
- else
- g_string_append(str,", loopback=0");
-
-
-
- caps = capture_get_if_capabilities(if_info->name, 0, NULL, if_cap_err, NULL);
-
- if (caps != NULL) {
- if (caps->data_link_types != NULL) {
- GList* lt_entry = caps->data_link_types;
- data_link_info_t *data_link_info;
-
- g_string_append(str,", data_link_types=[");
-
- for (; lt_entry != NULL; lt_entry = g_list_next(lt_entry) ) {
-
- data_link_info = (data_link_info_t *)lt_entry->data;
- g_string_append_printf(str,"{ name='%s', desc='%s' }, ", data_link_info->name, (data_link_info->description) ? data_link_info->description : "" );
- }
-
- g_string_truncate(str,str->len - 2); /* the comma and space */
- g_string_append(str,"]");
- }
-
- g_string_append_printf(str,", can_set_rfmon=%s", caps->can_set_rfmon ? "1" : "0");
-
- if (caps->can_set_rfmon) {
- free_if_capabilities(caps);
- caps = capture_get_if_capabilities(if_info->name, 1, NULL, if_cap_err, NULL);
-
- if (caps->data_link_types != NULL) {
- GList* lt_entry = caps->data_link_types;
- data_link_info_t *data_link_info;
-
- g_string_append(str,", data_link_types_rfmon=[");
-
- for (; lt_entry != NULL; lt_entry = g_list_next(lt_entry)) {
- data_link_info = (data_link_info_t *)lt_entry->data;
- g_string_append_printf(str,"{ name='%s', desc='%s' }, ", data_link_info->name, (data_link_info->description) ? data_link_info->description : "" );
- }
-
- g_string_truncate(str,str->len - 2); /* the comma and space */
- g_string_append(str,"]");
- }
- }
-
- free_if_capabilities(caps);
- }
-
- g_string_append(str,"},\n");
- }
-
- g_string_truncate(str,str->len - 2); /* the comma and return */
- g_string_append(str,"}");
-
- return g_string_free(str,FALSE);
-}
-
-static char* intf_list = NULL;
-
-static void get_interfaces(char** err) {
- int err_no = 0;
- GList* if_list;
-
- err = NULL;
- if_list = capture_interface_list(&err_no, err, NULL);
-
- if (err) {
- DISP_DBG((1,"Could not get capture interface list: %s",err));
- } else {
- intf_list = intflist2json(if_list,err);
- if (err) {
- DISP_DBG((1,"get capabilities error: %s",err));
- }
- }
-
- free_interface_list(if_list);
-}
-
-
-static char* param_get_interfaces(char** err _U_) {
- return g_strdup(intf_list ? intf_list : "");
-}
-
-static long disp_loop_timeout_usec = DISPATCHER_WAIT_INITIAL;
-
-static char* param_get_loop_timeout(char** err _U_) {
- return g_strdup_printf("%fs", (((float)disp_loop_timeout_usec)/1000000.0) );
-}
-
-static echld_bool_t param_set_loop_timeout(char* val , char** err ) {
- char* p;
- int usec = (int)strtol(val, &p, 10); /* now usecs 2DO: "10ms" or "500us" or "1s" */
-
- if (p<=val) {
- *err = g_strdup("not an integer");
- return FALSE;
- }
-
- disp_loop_timeout_usec = usec;
-
- return TRUE;
-}
-
-static GString *comp_info_str;
-static GString *runtime_info_str;
-static const char* version_str = "Echld " VERSION;
-static char* version_long_str = NULL;
-
-
-static char* param_get_long_version(char** err _U_) {
- return g_strdup(version_long_str);
-}
-
-static char* param_get_version(char** err _U_) {
- return g_strdup(version_str);
-}
-
-static char* param_get_capture_types(char** err _U_) {
- GString* str = g_string_new("");
- int i;
-
- for (i = 0; i < WTAP_NUM_FILE_TYPES_SUBTYPES; i++) {
- if (wtap_dump_can_open(i)) {
- g_string_append_printf(str,"%s: %s\n",
- wtap_file_type_subtype_short_string(i), wtap_file_type_subtype_string(i));
- }
- }
-
- return g_string_free(str,FALSE);
-}
-
-static echld_bool_t param_set_add_hosts_file(char* val, char** err) {
- if (add_hosts_file(val)) {
- return TRUE;
- } else {
- *err = g_strdup_printf("Can't read host entries from \"%s\"",val);
- return FALSE;
- }
-}
-
-static echld_bool_t param_set_x_opt(char* val, char** err) {
- if (ex_opt_add(val)) {
- return TRUE;
- } else {
- *err = g_strdup_printf("Cannot set X opt '%s'",val);
- return FALSE;
- }
-}
-
-
-
-
-static char* param_get_params(char** err _U_);
-
-static param_t disp_params[] = {
-#ifdef DEBUG_DISPATCHER
- PARAM(dbg_level,"0>int>5"),
-# endif
- RO_PARAM(long_version,"long version string"),
- RO_PARAM(version,"version string"),
- PARAM(loop_timeout,"main loop step timeout"),
- RO_PARAM(interfaces,"interface information"),
- RO_PARAM(capture_types,"the available capture types"),
- WO_PARAM(add_hosts_file,"Add a hosts file"),
- WO_PARAM(x_opt,"Set a -X option"),
- RO_PARAM(params,"This List"),
- {NULL,NULL,NULL,NULL}
-};
-
-static char* param_get_params(char** err _U_) {
- return paramset_get_params_list(disp_params,PARAM_LIST_FMT);
-}
-
-static struct dispatcher_child* dispatcher_get_child(struct dispatcher* d, int chld_id) {
- int i;
- struct dispatcher_child* cc = d->children;
- int max_children = d->max_children;
-
- for(i = 0; i < max_children; i++) {
- struct dispatcher_child* c = &(cc[i]);
- if (c->chld_id == chld_id) return c;
- }
-
- return NULL;
-}
-
-
-static void dispatcher_clear_child(struct dispatcher_child* c) {
- echld_reset_reader(&(c->reader), -1, 4096);
- c->chld_id = -1;
- c->state = FREE;
- c->reader.fd = -1;
- c->write_fd = -1;
- c->pid = -1;
- c->reqh_id = -1;
- c->closing = FALSE;
-}
-
-static void set_dumpcap_pid(int pid) {
-
- dispatcher->dumpcap_pid = pid;
-}
-
-static void preinit_epan(char* argv0, int (*main)(int, char **)) {
- char *gdp_path, *dp_path;
-#if 0
- char *gpf_path, *pf_path;
- int gpf_open_errno, gpf_read_errno;
- int pf_open_errno, pf_read_errno;
-#endif
- int gdp_open_errno, gdp_read_errno;
- int dp_open_errno, dp_read_errno;
- char* error;
-
- error = init_progfile_dir(argv0, main);
-
- comp_info_str = get_compiled_version_info(NULL, epan_get_compiled_version_info);
-
- runtime_info_str = get_runtime_version_info(NULL);
-
- version_long_str = g_strdup_printf("Echld %s\n%s\n%s\n%s",
- get_ws_vcs_version_info(), get_copyright_info(),
- comp_info_str->str, runtime_info_str->str);
-
- if (error) {
- DISP_FATAL((CANNOT_PREINIT_EPAN,"Failed epan_preinit: msg='%s'",error));
- }
-
- /* Add it to the information to be reported on a crash. */
- ws_add_crash_info("Echld %s\n%s\n%s",
- get_ws_vcs_version_info(), comp_info_str->str, runtime_info_str->str);
-
- init_stuff();
-
- capture_sync_set_fetch_dumpcap_pid_cb(set_dumpcap_pid);
-
- init_process_policies();
-
- get_interfaces(&error);
-
- if (error) {
- DISP_FATAL((CANNOT_PREINIT_EPAN,"Error getting interfaces: %s", error));
- }
-
- prefs_apply_all();
-
- /* disabled protocols as per configuration file */
- set_disabled_protos_list();
- set_enabled_protos_list();
- set_disabled_heur_dissector_list();
-
- setlocale(LC_ALL, "");
- DISP_DBG((1,"---5"));
-
- read_disabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno, &dp_path, &dp_open_errno, &dp_read_errno);
- read_enabled_protos_list(&gdp_path, &gdp_open_errno, &gdp_read_errno, &dp_path, &dp_open_errno, &dp_read_errno);
- read_disabled_heur_dissector_list(&gdp_path, &gdp_open_errno, &gdp_read_errno, &dp_path, &dp_open_errno, &dp_read_errno);
-
- DISP_DBG((1,"---6"));
-
- cap_file_init(&stuff.cfile);
- DISP_DBG((1,"---7"));
-
- DISP_DBG((1,"---8"));
- timestamp_set_precision(TS_PREC_AUTO);
-
-#if 0
- sleep(10);
-
- initialize_funnel_ops();
- stuff.prefs = read_prefs(&gpf_open_errno, &gpf_read_errno, &gpf_path, &pf_open_errno, &pf_read_errno, &pf_path);
- check 4 errors
-#endif
-
- DISP_DBG((2,"epan preinit done"));
-}
-
-
-static void dispatcher_clear(void) {
- DISP_DBG((2,"dispatcher_clear"));
- /* remove unnecessary stuff for the working child */
- /* remove signal handlers */
-}
-
-void dispatcher_sig(int sig) {
- DISP_FATAL((TERMINATED,"SIG sig=%d",sig));
- exit(1);
-}
-
-void dispatcher_reaper(int sig) {
- int status;
- int i;
- struct dispatcher_child* cc = dispatcher->children;
- int max_children = dispatcher->max_children;
- int pid = waitpid(-1, &status, WNOHANG);
- int reqh_id_save = dispatcher->reqh_id;
-
- dispatcher->reqh_id = 0;
-
- if (sig != SIGCHLD) {
- DISP_DBG((1,"Reaper got wrong signal=%d",sig));
- dispatcher->reqh_id = reqh_id_save;
- return;
- }
-
- DISP_DBG((2,"Child dead pid=%d",pid));
-
- for(i = 0; i < max_children; i++) {
- struct dispatcher_child* c = &(cc[i]);
- if ( c->pid == pid ) {
- if (c->closing || dispatcher->closing) {
- DISP_WRITE(dispatcher->parent_out, NULL, c->chld_id, ECHLD_CLOSING, c->reqh_id);
- } else {
- char* s = NULL;
- GByteArray* em;
-
- if (WIFEXITED(status)) {
- s = g_strdup_printf(
- "Unexpected dead: reason='exited' pid=%d status=%d",
- pid, WEXITSTATUS(status));
- } else if ( WIFSIGNALED(status) ) {
- s = g_strdup_printf(
- "Unexpected dead: reason='signaled' pid=%d termsig=%d coredump=%s",
- pid, WTERMSIG(status), WCOREDUMP(status) ? "yes":"no");
-
- /*if (WCOREDUMP(status)) { system("analyze_coredump.sh pid=%d") } */
-
- } else if (WIFSTOPPED(status)) {
- s = g_strdup_printf(
- "Unexpected dead: reason='stopped' pid=%d stopsig=%d",
- pid, WSTOPSIG(status));
- }
-
- em = dispatcher->enc.to_parent->child_dead(s);
- dispatcher_err(ECHLD_ERR_CRASHED_CHILD, s);
- if (s) g_free(s);
- DISP_WRITE(dispatcher->parent_out, em, c->chld_id, ECHLD_CHILD_DEAD, 0);
- if (em) g_byte_array_free(em,TRUE);
- }
-
- CHLD_SET_STATE(c,CLOSED);
- dispatcher_clear_child(c);
- dispatcher->reqh_id = reqh_id_save;
- return;
- }
- }
-
- if (pid == dispatcher->dumpcap_pid) {
- dispatcher->dumpcap_pid = 0;
- dispatcher->reqh_id = reqh_id_save;
- DISP_DBG((2,"dumpcap dead pid=%d",pid));
- return;
- }
-
- dispatcher_err(ECHLD_ERR_UNKNOWN_PID, "Unknown child pid: %d", pid);
- dispatcher->reqh_id = reqh_id_save;
-}
-
-
-static void dispatcher_destroy(void) {
- /* destroy the dispatcher stuff at closing */
-
- dispatcher->closing = TRUE;
-
- children_massacre();
-
- exit(0);
-}
-
-/* stuff coming from child going to parent */
-static long dispatch_to_parent(guint8* b, size_t len, echld_chld_id_t chld_id, echld_msg_type_t type, echld_reqh_id_t reqh_id, void* data) {
- /* TODO: timeouts, clear them */
- /* TODO: keep stats */
-
- GByteArray in_ba;
-
- struct dispatcher_child* c = (struct dispatcher_child*)data;
-
- dispatcher->reqh_id = c->reqh_id = reqh_id;
-
- in_ba.data = b;
- in_ba.len = (guint)len;
-
- if (chld_id != c->chld_id) {
- goto misbehabing;
- }
-
- switch(type) {
- case ECHLD_ERROR: break;
- case ECHLD_TIMED_OUT: break;
- case ECHLD_HELLO: CHLD_SET_STATE(c,IDLE); break;
- case ECHLD_CLOSING:
- c->closing = TRUE;
- CHLD_SET_STATE(c,CLOSING);
- break;
- case ECHLD_PARAM: break;
- case ECHLD_PONG: break;
- case ECHLD_FILE_OPENED: CHLD_SET_STATE(c,READING); break;
- case ECHLD_INTERFACE_OPENED: CHLD_SET_STATE(c,READY); break;
- case ECHLD_CAPTURE_STARTED: CHLD_SET_STATE(c,CAPTURING); break;
- case ECHLD_NOTIFY: break;
- case ECHLD_PACKET_SUM: break;
- case ECHLD_TREE: break;
- case ECHLD_BUFFER: break;
-
- case ECHLD_EOF:
- case ECHLD_CAPTURE_STOPPED: CHLD_SET_STATE(c,DONE); break;
-
- case ECHLD_NOTE_ADDED: break;
- case ECHLD_PACKET_LIST: break;
- case ECHLD_FILE_SAVED: break;
-
- default:
- goto misbehabing;
- }
-
- DISP_DBG((4,"Dispatching to parent reqh_id=%d chld_id=%d type='%c'",reqh_id,c->chld_id,type));
- return DISP_WRITE(dispatcher->parent_out, &in_ba, chld_id, type, reqh_id);
-
-misbehabing:
- CHLD_SET_STATE(c,ERRORED);
- c->closing = TRUE;
- kill(c->pid,SIGTERM);
- dispatcher_err(ECHLD_ERR_CRASHED_CHILD,"chld_id=%d",chld_id);
- return 0;
-
-}
-
-static struct timeval start_wait_time;
-static long start_wait_time_us = CHILD_START_WAIT_TIME;
-
-static void detach_new_child(enc_msg_t* em, echld_chld_id_t chld_id) {
- struct dispatcher_child* c;
- int reqh_id = dispatcher->reqh_id;
- int pid;
-
- if (( c = dispatcher_get_child(dispatcher, chld_id) )) {
- dispatcher_err(ECHLD_ERR_CHILD_EXISTS,"chld_id=%d exists already while creating new child",chld_id);
- return;
- } else if (( c = dispatcher_get_child(dispatcher, -1) )) {
- int disp_pipe_fds[2];
- int child_pipe_fds[2];
-
- int pipe_to_disp;
- int pipe_from_disp;
- int pipe_to_child;
- int pipe_from_child;
-
- DISP_DBG((5,"new_child pipe(dispatcher)"));
- if( pipe(disp_pipe_fds) < 0) {
- dispatcher_err(ECHLD_ERR_CANNOT_FORK,"CANNOT OPEN PARENT PIPE: %s",g_strerror(errno));
- return;
- }
-
- pipe_from_disp = disp_pipe_fds[0];
- pipe_to_child = disp_pipe_fds[1];
-
- DISP_DBG((5,"new_child pipe(child)"));
- if( pipe(child_pipe_fds) < 0) {
- close(pipe_from_disp);
- close(pipe_to_child);
- dispatcher_err(ECHLD_ERR_CANNOT_FORK,"CANNOT OPEN CHILD PIPE: %s",g_strerror(errno));
- return;
- }
-
- pipe_from_child = child_pipe_fds[0];
- pipe_to_disp = child_pipe_fds[1];
-
- DISP_DBG((4,"New Child Forking()"));
- switch (( pid = fork() )) {
- case -1: {
- close(pipe_to_child);
- close(pipe_to_disp);
- close(pipe_from_child);
- close(pipe_from_disp);
- dispatcher_err(ECHLD_ERR_CANNOT_FORK,"CANNOT FORK: %s",g_strerror(errno));
- return;
- }
- case 0: {
- /* I'm the child */
- dispatcher_clear();
-
- close(pipe_to_child);
- close(pipe_from_child);
-
- echld_child_initialize(chld_id, pipe_from_disp,pipe_to_disp,reqh_id,&stuff);
-
- exit( echld_child_loop() );
-
- /* it won't */
- return;
- }
- default: {
- /* I'm the parent */
-
- close(pipe_to_disp);
- close(pipe_from_disp);
-
- echld_reset_reader(&(c->reader), pipe_from_child,4096);
- c->write_fd = pipe_to_child;
- c->pid = pid;
- c->chld_id = chld_id;
- c->closing = FALSE;
-
- CHLD_SET_STATE(c,CREATING);
-
- DISP_DBG((4,"Child Forked pid=%d chld_id=%d from_fd=%d to_fd=%d",
- pid, c->chld_id, pipe_from_child, pipe_to_child));
-
- start_wait_time.tv_sec = (int)(start_wait_time_us / 1000000);
- start_wait_time.tv_usec = (int)(start_wait_time_us % 1000000);
-
- select(0,NULL,NULL,NULL,&start_wait_time);
-
- /* configure child */
- DISP_WRITE(pipe_to_child, em, c->chld_id, ECHLD_NEW_CHILD, dispatcher->reqh_id);
- return;
- }
- }
- } else {
- dispatcher_err(ECHLD_ERR_CANNOT_FORK, "MAX CHILDREN REACHED: max_children=%d",dispatcher->max_children);
- return;
- }
-}
-
-
-/* process signals sent from parent */
-static long dispatch_to_child(guint8* b, size_t len, echld_chld_id_t chld_id, echld_msg_type_t type, echld_reqh_id_t reqh_id, void* data _U_) {
- GByteArray in_ba;
-
- in_ba.data = b;
- in_ba.len = (guint)len;
-
- dispatcher->reqh_id = reqh_id;
-
- DISP_DBG((1,"RCV<- type='%s' chld_id=%d reqh_id=%d",TY(type),chld_id,reqh_id));
-
- if (chld_id == 0) { /* these are messages sent to the dispatcher itself */
- DISP_DBG((2,"Message to Dispatcher"));
- switch(type) {
- case ECHLD_CLOSE_CHILD:
- dispatcher_destroy();
- return 0;
- case ECHLD_PING:
- DISP_DBG((2,"PONG reqh_id=%d",reqh_id));
- DISP_WRITE(dispatcher->parent_out, NULL, chld_id, ECHLD_PONG, reqh_id);
- return 0;
- case ECHLD_SET_PARAM:{
- char* param;
- char* value;
- if ( dispatcher->dec.from_parent->set_param(b,len,&param,&value) ) {
- GByteArray* ba;
- char* err;
- if (! paramset_apply_set (disp_params, param, value, &err) ) {
- dispatcher_err(ECHLD_CANNOT_SET_PARAM,"%s",err);
- g_free(err);
- return 0;
- }
-
- ba = dispatcher->enc.to_parent->param(param,value);
- DISP_RESP(ba,ECHLD_PARAM);
- g_byte_array_free(ba,TRUE);
- DISP_DBG((1,"Set Param: param='%s' value='%s'",param,value));
-
- return 0;
- } else {
- dispatcher_err(ECHLD_CANNOT_SET_PARAM,"reason='decoder error'");
- return 0;
- }
- }
- case ECHLD_GET_PARAM: {
- GByteArray* ba;
- char* param;
- if ( dispatcher->dec.from_parent->get_param(b,len,&param) ) {
- char* err;
- char* val;
-
- if (! (val = paramset_apply_get (disp_params, param, &err)) ) {
- dispatcher_err(ECHLD_CANNOT_GET_PARAM,"%s",err);
- g_free(err);
- return 0;
- }
-
- ba = dispatcher->enc.to_parent->param(param,val);
- DISP_RESP(ba,ECHLD_PARAM);
- g_byte_array_free(ba,TRUE);
- DISP_DBG((1,"Get Param: param='%s' value='%s'",param,val));
- return 0;
- } else {
- dispatcher_err(ECHLD_CANNOT_GET_PARAM,"reason='decoder error'");
- return 0;
- }
- }
- default:
- dispatcher_err(ECHLD_ERR_WRONG_MSG, "wrong message to dispatcher type='%c'", type);
- return 0;
- }
- } else {
- struct dispatcher_child* c;
-
- DISP_DBG((2,"Parent => Child"));
-
- if (! (c = dispatcher_get_child(dispatcher, chld_id)) ) {
- if (type == ECHLD_NEW_CHILD) {
- detach_new_child(&in_ba,chld_id);
- return 0;
- } else {
- dispatcher_err(ECHLD_ERR_NO_SUCH_CHILD, "wrong chld_id %d", chld_id);
- return 0;
- }
- } else {
- switch(type) {
- case ECHLD_CLOSE_CHILD:
- CHLD_SET_STATE(c,CLOSED);
- goto relay_frame;
-
- case ECHLD_OPEN_FILE:
- CHLD_SET_STATE(c,READING);
- goto relay_frame;
-
- case ECHLD_OPEN_INTERFACE:
- CHLD_SET_STATE(c,READY);
- goto relay_frame;
-
- case ECHLD_START_CAPTURE:
- CHLD_SET_STATE(c,CAPTURING);
- goto relay_frame;
-
- case ECHLD_STOP_CAPTURE:
- CHLD_SET_STATE(c,DONE);
- goto relay_frame;
-
- case ECHLD_SAVE_FILE:
- case ECHLD_APPLY_FILTER:
- case ECHLD_SET_PARAM:
- case ECHLD_GET_PARAM:
- case ECHLD_PING:
- case ECHLD_GET_SUM:
- case ECHLD_GET_TREE:
- case ECHLD_GET_BUFFER:
- case ECHLD_ADD_NOTE:
- relay_frame: {
- DISP_DBG((3,"Relay to Child chld_id=%d type='%c' req_id=%d",chld_id, type, reqh_id));
- return DISP_WRITE(c->write_fd, &in_ba, chld_id, type, reqh_id);
- }
- default:
- dispatcher_err(ECHLD_ERR_WRONG_MSG, "wrong message %d %c", reqh_id, type);
- return 0;
- }
- }
- }
-}
-
-
-
-int dispatcher_loop(void) {
- int parent_out = dispatcher->parent_out;
- int parent_in = dispatcher->parent_in.fd;
- struct dispatcher_child* children = dispatcher->children;
-
- DISP_DBG((5,"LOOP in_fd=%d out_fd=%d",parent_in, parent_out));
-
- do {
- fd_set rfds;
- fd_set efds;
- struct dispatcher_child* c;
- int nfds;
- int nchld = 0;
- struct timeval disp_loop_timeout;
-
- FD_ZERO(&rfds);
- FD_ZERO(&efds);
-
- FD_SET(parent_in,&rfds);
- FD_SET(parent_in,&efds);
- FD_SET(parent_out,&efds);
-
- for (c = children; c->pid; c++) {
- if (c->chld_id > 0) {
- nchld++;
- FD_SET(c->reader.fd, &rfds);
- FD_SET(c->reader.fd, &efds);
- }
- }
-
- DISP_DBG((4,"Select()ing nchld=%d",nchld,disp_loop_timeout.tv_usec));
-
- disp_loop_timeout.tv_sec = (int)(disp_loop_timeout_usec / 1000000);
- disp_loop_timeout.tv_usec = (int)(disp_loop_timeout_usec % 1000000);
-
- nfds = select(FD_SETSIZE, &rfds, NULL, &efds, &disp_loop_timeout);
-
- DISP_DBG((5,"Select()ed nfds=%d",nchld,nfds));
-
- if (nfds < 0) {
- DISP_DBG((1,"select error='%s'",g_strerror(errno) ));
- continue;
- }
-
- if ( FD_ISSET(parent_in, &rfds)) {
- long st = echld_read_frame(&(dispatcher->parent_in), dispatch_to_child, dispatcher);
-
- if (st < 0) {
- DISP_DBG((1,"read frame returning < 0 for parent"));
- /* XXX: ??? */
- continue;
- }
- }
-
- if ( FD_ISSET(parent_in, &efds) ) {
- DISP_DBG((1,"Parent In Pipe Errored!"));
- continue;
- }
-
- if ( FD_ISSET(parent_out, &efds) ) {
- DISP_DBG((1,"Parent Out Pipe Errored!"));
- continue;
- }
-
-
- for (c=children; c->pid; c++) {
- if (c->reader.fd > 0) {
- if ( FD_ISSET(c->reader.fd,&efds) ) {
- struct timeval wait_time;
- wait_time.tv_sec = 0;
- wait_time.tv_usec = DISP_KILLED_CHILD_WAIT;
-
- DISP_DBG((1,"errored child pipe chld_id=%d",c->chld_id));
- kill(c->pid,SIGTERM);
- select(0,NULL,NULL,NULL,&wait_time);
- dispatcher_clear_child(c);
- continue;
- }
-
- if (FD_ISSET(c->reader.fd,&rfds)) {
- long st = echld_read_frame(&(c->reader), dispatch_to_parent, c);
-
- if (st < 0) {
- DISP_DBG((1,"read_frame returned < 0 for chld_id=%d",c->chld_id));
- /* XXX */
- continue;
- }
- continue;
- }
- }
- }
- } while(1);
-
- /* won't */
- return 1;
-}
-
-void dispatcher_alrm(int sig _U_) {
- DISP_DBG((1,"ALRM received"));
-}
-
-void echld_dispatcher_start(int* in_pipe_fds, int* out_pipe_fds, char* argv0, int (*main)(int, char **)) {
- static struct dispatcher d;
- int i;
- int ret;
-
- DISP_DBG_INIT();
- DISP_DBG((2,"Dispatcher Starting"));
-
-
- signal(SIGCHLD,dispatcher_reaper);
-
- signal(SIGTERM,dispatcher_sig);
- signal(SIGPIPE,dispatcher_sig);
- signal(SIGINT,SIG_IGN);
- signal(SIGCONT,SIG_IGN);
- signal(SIGABRT,dispatcher_sig);
- signal(SIGHUP,dispatcher_sig);
- signal(SIGALRM,dispatcher_alrm);
-
- dispatcher = &d;
-
- echld_init_reader(&(d.parent_in),in_pipe_fds[0],4096);
- d.parent_out = out_pipe_fds[1];
- d.children = g_new0(struct dispatcher_child,ECHLD_MAX_CHILDREN);
- d.max_children = ECHLD_MAX_CHILDREN;
- d.nchildren = 0;
- d.reqh_id = -1;
- d.pid = getpid();
- d.dumpcap_pid = 0;
-
- for (i=0;i<ECHLD_MAX_CHILDREN;i++) dispatcher_clear_child(&(d.children[i]));
-
- close(out_pipe_fds[0]);
- close(in_pipe_fds[1]);
-
- echld_get_all_codecs(&(d.enc.to_parent), &(d.dec.from_parent), &(d.enc.to_child), &(d.dec.from_child));
-
- DISP_DBG((2,"Dispatcher Configured pid=%d parent_in=%d parent_out=%d",d.pid,in_pipe_fds[0],d.parent_out));
-
- preinit_epan(argv0,main);
-
- DISP_WRITE(dispatcher->parent_out, NULL, 0, ECHLD_HELLO, 0);
-
- ret = dispatcher_loop();
- capture_opts_cleanup(&(dispatcher->capture_opts));
- exit(ret);
-}
-
-/*
- * Editor modelines - http://www.wireshark.org/tools/modelines.html
- *
- * Local variables:
- * c-basic-offset: 4
- * tab-width: 8
- * indent-tabs-mode: t
- * End:
- *
- * vi: set shiftwidth=4 tabstop=8 noexpandtab:
- * :indentSize=4:tabSize=8:noTabs=false:
- */