| /* |
| * (C) 2009 by Pablo Neira Ayuso <pablo@netfilter.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., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| #include <signal.h> |
| #include "conntrackd.h" |
| #include "process.h" |
| |
| static LIST_HEAD(process_list); |
| |
| int fork_process_new(int type, int flags, void (*cb)(void *data), void *data) |
| { |
| struct child_process *c, *this; |
| int pid; |
| |
| /* We only want one process of this type at the same time. This is |
| * useful if you want to prevent two child processes from accessing |
| * a shared descriptor at the same time. */ |
| if (flags & CTD_PROC_F_EXCL) { |
| list_for_each_entry(this, &process_list, head) { |
| if (this->type == type) { |
| return -1; |
| } |
| } |
| } |
| c = calloc(sizeof(struct child_process), 1); |
| if (c == NULL) |
| return -1; |
| |
| c->type = type; |
| c->cb = cb; |
| c->data = data; |
| c->pid = pid = fork(); |
| |
| if (c->pid > 0) |
| list_add(&c->head, &process_list); |
| else |
| free(c); |
| |
| return pid; |
| } |
| |
| int fork_process_delete(int pid) |
| { |
| struct child_process *this, *tmp; |
| |
| list_for_each_entry_safe(this, tmp, &process_list, head) { |
| if (this->pid == pid) { |
| list_del(&this->head); |
| if (this->cb) { |
| this->cb(this->data); |
| } |
| free(this); |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| static const char *process_type_to_name[CTD_PROC_MAX] = { |
| [CTD_PROC_ANY] = "any", |
| [CTD_PROC_FLUSH] = "flush", |
| [CTD_PROC_COMMIT] = "commit", |
| }; |
| |
| void fork_process_dump(int fd) |
| { |
| struct child_process *this; |
| char buf[4096]; |
| int size = 0; |
| |
| list_for_each_entry(this, &process_list, head) { |
| size += snprintf(buf+size, sizeof(buf), |
| "PID=%u type=%s\n", |
| this->pid, |
| this->type < CTD_PROC_MAX ? |
| process_type_to_name[this->type] : "unknown"); |
| } |
| |
| send(fd, buf, size, 0); |
| } |