X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnetutl.c;h=14ed5cef0e3db05aecc79fa730fbbdaad4d91402;hp=f49178bdfafbc1028314ffe145d02e61d44e51f6;hb=1c34ba7fb8580949f3bd3a0d804747bbaea28e36;hpb=9fd02ffcb0cacf3de26e876de5f30510bff137a3 diff --git a/src/netutl.c b/src/netutl.c index f49178bd..14ed5cef 100644 --- a/src/netutl.c +++ b/src/netutl.c @@ -1,6 +1,7 @@ /* netutl.c -- some supporting network utility code - Copyright (C) 1998,1999,2000 Ivo Timmermans + Copyright (C) 1998-2002 Ivo Timmermans + 2000-2002 Guus Sliepen 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 @@ -15,11 +16,13 @@ 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. + + $Id: netutl.c,v 1.12.4.23 2002/02/11 10:16:18 guus Exp $ */ #include "config.h" -#include +#include #include #include #include @@ -27,215 +30,76 @@ #include #include #include +#include #include #include -#include "encr.h" +#include "errno.h" +#include "conf.h" #include "net.h" #include "netutl.h" #include "system.h" -/* - look for a connection associated with the given vpn ip, - return its connection structure. - Skips connections that are not activated! -*/ -conn_list_t *lookup_conn(ip_t ip) -{ - conn_list_t *p = conn_list; -cp - /* Exact match suggested by James B. MacLean */ - for(p = conn_list; p != NULL; p = p->next) - if((ip == p->vpn_ip) && p->status.active) - return p; - for(p = conn_list; p != NULL; p = p->next) - if(((ip & p->vpn_mask) == (p->vpn_ip & p->vpn_mask)) && p->status.active) - return p; -cp - return NULL; -} - -/* - free a queue and all of its elements -*/ -void destroy_queue(packet_queue_t *pq) -{ - queue_element_t *p, *q; -cp - for(p = pq->head; p != NULL; p = q) - { - q = p->next; - if(p->packet) - free(p->packet); - free(p); - } - - free(pq); -cp -} - -/* - free a conn_list_t element and all its pointers -*/ -void free_conn_element(conn_list_t *p) -{ -cp - if(p->hostname) - free(p->hostname); - if(p->sq) - destroy_queue(p->sq); - if(p->rq) - destroy_queue(p->rq); - free_key(p->public_key); - free_key(p->key); - free(p); -cp -} - -/* - remove all marked connections -*/ -void prune_conn_list(void) -{ - conn_list_t *p, *prev = NULL, *next = NULL; -cp - for(p = conn_list; p != NULL; ) - { - next = p->next; - - if(p->status.remove) - { - if(prev) - prev->next = next; - else - conn_list = next; - - free_conn_element(p); - } - else - prev = p; - - p = next; - } -cp -} - -/* - creates new conn_list element, and initializes it -*/ -conn_list_t *new_conn_list(void) -{ - conn_list_t *p = xmalloc(sizeof(*p)); -cp - /* initialise all those stupid pointers at once */ - memset(p, '\0', sizeof(*p)); - p->vpn_mask = (ip_t)(~0L); /* If this isn't done, it would be a - wastebucket for all packets with - unknown destination. */ - p->nexthop = p; -cp - return p; -} - -/* - free all elements of conn_list -*/ -void destroy_conn_list(void) -{ - conn_list_t *p, *next; -cp - for(p = conn_list; p != NULL; ) - { - next = p->next; - free_conn_element(p); - p = next; - } - - conn_list = NULL; -cp -} - -/* - look up the name associated with the ip - address `addr' -*/ char *hostlookup(unsigned long addr) { char *name; struct hostent *host = NULL; struct in_addr in; + int lookup_hostname = 0; cp in.s_addr = addr; - host = gethostbyaddr((char *)&in, sizeof(in), AF_INET); + get_config_bool(lookup_config(config_tree, "Hostnames"), &lookup_hostname); + + if(lookup_hostname) + host = gethostbyaddr((char *)&in, sizeof(in), AF_INET); - if(host) + if(!lookup_hostname || !host) { - name = xmalloc(strlen(host->h_name)+20); - sprintf(name, "%s (%s)", host->h_name, inet_ntoa(in)); + asprintf(&name, "%s", inet_ntoa(in)); } else { - name = xmalloc(20); - sprintf(name, "%s", inet_ntoa(in)); + asprintf(&name, "%s", host->h_name); } cp return name; } /* - Turn a string into an IP addy with netmask + Turn a string into an IP address return NULL on failure + Should support IPv6 and other stuff in the future. */ -ip_mask_t *strtoip(char *str) +ipv4_t str2address(char *str) { - ip_mask_t *ip; - int masker; - char *q, *p; + ipv4_t address; struct hostent *h; cp - p = str; - if((q = strchr(p, '/'))) + if(!(h = gethostbyname(str))) { - *q = '\0'; - q++; /* q now points to netmask part, or NULL if no mask */ + if(debug_lvl >= DEBUG_ERROR) + syslog(LOG_WARNING, _("Error looking up `%s': %s\n"), str, strerror(errno)); + + return 0; } - if(!(h = gethostbyname(p))) - { - fprintf(stderr, _("Error looking up `%s': %s\n"), p, sys_errlist[h_errno]); - return NULL; - } - - masker = 0; - if(q) - { - masker = strtol(q, &p, 10); - if(q == p || (*p)) - return NULL; - } - - ip = xmalloc(sizeof(*ip)); - ip->ip = ntohl(*((ip_t*)(h->h_addr_list[0]))); - - ip->mask = masker ? ~((1 << (32 - masker)) - 1) : 0; + address = ntohl(*((ipv4_t*)(h->h_addr_list[0]))); cp - return ip; + return address; } -void dump_conn_list(void) +char *address2str(ipv4_t address) { - conn_list_t *p; + char *str; cp - syslog(LOG_DEBUG, _("Connection list:")); - - for(p = conn_list; p != NULL; p = p->next) - { - syslog(LOG_DEBUG, " " IP_ADDR_S "/" IP_ADDR_S ": %04x (%d|%d)", - IP_ADDR_V(p->vpn_ip), IP_ADDR_V(p->vpn_mask), p->status, - p->socket, p->meta_socket); - } + asprintf(&str, "%hu.%hu.%hu.%hu", + (unsigned short int)((address >> 24) & 255), + (unsigned short int)((address >> 16) & 255), + (unsigned short int)((address >> 8) & 255), + (unsigned short int)(address & 255)); cp + return str; }