version 1.1.1.4, 2021/03/17 00:56:46
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version 1.1.1.5, 2023/09/27 11:02:07
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/* dnsmasq is Copyright (c) 2000-2021 Simon Kelley | /* dnsmasq is Copyright (c) 2000-2022 Simon Kelley |
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This program is free software; you can redistribute it and/or modify |
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 |
it under the terms of the GNU General Public License as published by |
Line 79 ssize_t recv_dhcp_packet(int fd, struct msghdr *msg)
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Line 79 ssize_t recv_dhcp_packet(int fd, struct msghdr *msg)
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return (msg->msg_flags & MSG_TRUNC) ? -1 : new_sz; |
return (msg->msg_flags & MSG_TRUNC) ? -1 : new_sz; |
} |
} |
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/* like match_netid() except that the check can have a trailing * for wildcard */ |
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/* started as a direct copy of match_netid() */ |
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int match_netid_wild(struct dhcp_netid *check, struct dhcp_netid *pool) |
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{ |
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struct dhcp_netid *tmp1; |
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for (; check; check = check->next) |
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{ |
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const int check_len = strlen(check->net); |
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const int is_wc = (check_len > 0 && check->net[check_len - 1] == '*'); |
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/* '#' for not is for backwards compat. */ |
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if (check->net[0] != '!' && check->net[0] != '#') |
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{ |
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for (tmp1 = pool; tmp1; tmp1 = tmp1->next) |
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if (is_wc ? (strncmp(check->net, tmp1->net, check_len-1) == 0) : |
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(strcmp(check->net, tmp1->net) == 0)) |
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break; |
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if (!tmp1) |
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return 0; |
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} |
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else |
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for (tmp1 = pool; tmp1; tmp1 = tmp1->next) |
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if (is_wc ? (strncmp((check->net)+1, tmp1->net, check_len-2) == 0) : |
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(strcmp((check->net)+1, tmp1->net) == 0)) |
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return 0; |
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} |
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return 1; |
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} |
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struct dhcp_netid *run_tag_if(struct dhcp_netid *tags) |
struct dhcp_netid *run_tag_if(struct dhcp_netid *tags) |
{ |
{ |
struct tag_if *exprs; |
struct tag_if *exprs; |
struct dhcp_netid_list *list; |
struct dhcp_netid_list *list; |
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/* this now uses match_netid_wild() above so that tag_if can |
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* be used to set a 'group of interfaces' tag. |
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*/ |
for (exprs = daemon->tag_if; exprs; exprs = exprs->next) |
for (exprs = daemon->tag_if; exprs; exprs = exprs->next) |
if (match_netid(exprs->tag, tags, 1)) | if (match_netid_wild(exprs->tag, tags)) |
for (list = exprs->set; list; list = list->next) |
for (list = exprs->set; list; list = list->next) |
{ |
{ |
list->list->next = tags; |
list->list->next = tags; |
Line 280 static int is_config_in_context(struct dhcp_context *c
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Line 313 static int is_config_in_context(struct dhcp_context *c
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{ |
{ |
if (!context) /* called via find_config() from lease_update_from_configs() */ |
if (!context) /* called via find_config() from lease_update_from_configs() */ |
return 1; |
return 1; |
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if (!(config->flags & (CONFIG_ADDR | CONFIG_ADDR6))) |
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return 1; |
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#ifdef HAVE_DHCP6 |
#ifdef HAVE_DHCP6 |
if (context->flags & CONTEXT_V6) |
if (context->flags & CONTEXT_V6) |
{ |
{ |
struct addrlist *addr_list; |
struct addrlist *addr_list; |
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if (!(config->flags & CONFIG_ADDR6)) | if (config->flags & CONFIG_ADDR6) |
return 1; | for (; context; context = context->current) |
| for (addr_list = config->addr6; addr_list; addr_list = addr_list->next) |
for (; context; context = context->current) | { |
for (addr_list = config->addr6; addr_list; addr_list = addr_list->next) | if ((addr_list->flags & ADDRLIST_WILDCARD) && context->prefix == 64) |
{ | return 1; |
if ((addr_list->flags & ADDRLIST_WILDCARD) && context->prefix == 64) | |
return 1; | if (is_same_net6(&addr_list->addr.addr6, &context->start6, context->prefix)) |
| return 1; |
if (is_same_net6(&addr_list->addr.addr6, &context->start6, context->prefix)) | } |
return 1; | |
} | |
} |
} |
else |
else |
#endif |
#endif |
{ |
{ |
if (!(config->flags & CONFIG_ADDR)) |
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return 1; |
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for (; context; context = context->current) |
for (; context; context = context->current) |
if ((config->flags & CONFIG_ADDR) && is_same_net(config->addr, context->start, context->netmask)) |
if ((config->flags & CONFIG_ADDR) && is_same_net(config->addr, context->start, context->netmask)) |
return 1; |
return 1; |
Line 535 char *whichdevice(void)
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Line 566 char *whichdevice(void)
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} |
} |
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if (found) |
if (found) |
return found->name; | { |
| char *ret = safe_malloc(strlen(found->name)+1); |
| strcpy(ret, found->name); |
| return ret; |
| } |
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return NULL; |
return NULL; |
} |
} |
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void bindtodevice(char *device, int fd) | static int bindtodevice(char *device, int fd) |
{ |
{ |
size_t len = strlen(device)+1; |
size_t len = strlen(device)+1; |
if (len > IFNAMSIZ) |
if (len > IFNAMSIZ) |
Line 548 void bindtodevice(char *device, int fd)
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Line 583 void bindtodevice(char *device, int fd)
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/* only allowed by root. */ |
/* only allowed by root. */ |
if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, device, len) == -1 && |
if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, device, len) == -1 && |
errno != EPERM) |
errno != EPERM) |
die(_("failed to set SO_BINDTODEVICE on DHCP socket: %s"), NULL, EC_BADNET); | return 2; |
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| return 1; |
} |
} |
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int bind_dhcp_devices(char *bound_device) |
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{ |
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int ret = 0; |
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if (bound_device) |
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{ |
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if (daemon->dhcp) |
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{ |
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if (!daemon->relay4) |
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ret |= bindtodevice(bound_device, daemon->dhcpfd); |
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if (daemon->enable_pxe && daemon->pxefd != -1) |
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ret |= bindtodevice(bound_device, daemon->pxefd); |
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} |
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#if defined(HAVE_DHCP6) |
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if (daemon->doing_dhcp6 && !daemon->relay6) |
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ret |= bindtodevice(bound_device, daemon->dhcp6fd); |
#endif |
#endif |
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} |
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return ret; |
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} |
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#endif |
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static const struct opttab_t { |
static const struct opttab_t { |
char *name; |
char *name; |
Line 622 static const struct opttab_t {
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Line 683 static const struct opttab_t {
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{ "client-arch", 93, 2 | OT_DEC }, |
{ "client-arch", 93, 2 | OT_DEC }, |
{ "client-interface-id", 94, 0 }, |
{ "client-interface-id", 94, 0 }, |
{ "client-machine-id", 97, 0 }, |
{ "client-machine-id", 97, 0 }, |
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{ "posix-timezone", 100, OT_NAME }, /* RFC 4833, Sec. 2 */ |
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{ "tzdb-timezone", 101, OT_NAME }, /* RFC 4833, Sec. 2 */ |
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{ "ipv6-only", 108, 4 | OT_DEC }, /* RFC 8925 */ |
{ "subnet-select", 118, OT_INTERNAL }, |
{ "subnet-select", 118, OT_INTERNAL }, |
{ "domain-search", 119, OT_RFC1035_NAME }, |
{ "domain-search", 119, OT_RFC1035_NAME }, |
{ "sip-server", 120, 0 }, |
{ "sip-server", 120, 0 }, |
Line 658 static const struct opttab_t opttab6[] = {
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Line 722 static const struct opttab_t opttab6[] = {
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{ "sntp-server", 31, OT_ADDR_LIST }, |
{ "sntp-server", 31, OT_ADDR_LIST }, |
{ "information-refresh-time", 32, OT_TIME }, |
{ "information-refresh-time", 32, OT_TIME }, |
{ "FQDN", 39, OT_INTERNAL | OT_RFC1035_NAME }, |
{ "FQDN", 39, OT_INTERNAL | OT_RFC1035_NAME }, |
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{ "posix-timezone", 41, OT_NAME }, /* RFC 4833, Sec. 3 */ |
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{ "tzdb-timezone", 42, OT_NAME }, /* RFC 4833, Sec. 3 */ |
{ "ntp-server", 56, 0 /* OT_ADDR_LIST | OT_RFC1035_NAME */ }, |
{ "ntp-server", 56, 0 /* OT_ADDR_LIST | OT_RFC1035_NAME */ }, |
{ "bootfile-url", 59, OT_NAME }, |
{ "bootfile-url", 59, OT_NAME }, |
{ "bootfile-param", 60, OT_CSTRING }, |
{ "bootfile-param", 60, OT_CSTRING }, |
Line 772 char *option_string(int prot, unsigned int opt, unsign
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Line 838 char *option_string(int prot, unsigned int opt, unsign
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for (i = 0, j = 0; i < opt_len && j < buf_len ; i++) |
for (i = 0, j = 0; i < opt_len && j < buf_len ; i++) |
{ |
{ |
char c = val[i]; |
char c = val[i]; |
if (isprint((int)c)) | if (isprint((unsigned char)c)) |
buf[j++] = c; |
buf[j++] = c; |
} |
} |
#ifdef HAVE_DHCP6 |
#ifdef HAVE_DHCP6 |
Line 786 char *option_string(int prot, unsigned int opt, unsign
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Line 852 char *option_string(int prot, unsigned int opt, unsign
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for (k = i + 1; k < opt_len && k < l && j < buf_len ; k++) |
for (k = i + 1; k < opt_len && k < l && j < buf_len ; k++) |
{ |
{ |
char c = val[k]; |
char c = val[k]; |
if (isprint((int)c)) | if (isprint((unsigned char)c)) |
buf[j++] = c; |
buf[j++] = c; |
} |
} |
i = l; |
i = l; |
Line 807 char *option_string(int prot, unsigned int opt, unsign
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Line 873 char *option_string(int prot, unsigned int opt, unsign
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for (k = 0; k < len && j < buf_len; k++) |
for (k = 0; k < len && j < buf_len; k++) |
{ |
{ |
char c = *p++; |
char c = *p++; |
if (isprint((int)c)) | if (isprint((unsigned char)c)) |
buf[j++] = c; |
buf[j++] = c; |
} |
} |
i += len +2; |
i += len +2; |
Line 952 void log_context(int family, struct dhcp_context *cont
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Line 1018 void log_context(int family, struct dhcp_context *cont
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void log_relay(int family, struct dhcp_relay *relay) |
void log_relay(int family, struct dhcp_relay *relay) |
{ |
{ |
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int broadcast = relay->server.addr4.s_addr == 0; |
inet_ntop(family, &relay->local, daemon->addrbuff, ADDRSTRLEN); |
inet_ntop(family, &relay->local, daemon->addrbuff, ADDRSTRLEN); |
inet_ntop(family, &relay->server, daemon->namebuff, ADDRSTRLEN); | inet_ntop(family, &relay->server, daemon->namebuff, ADDRSTRLEN); |
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if (family == AF_INET && relay->port != DHCP_SERVER_PORT) |
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sprintf(daemon->namebuff + strlen(daemon->namebuff), "#%u", relay->port); |
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#ifdef HAVE_DHCP6 |
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struct in6_addr multicast; |
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inet_pton(AF_INET6, ALL_SERVERS, &multicast); |
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if (family == AF_INET6) |
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{ |
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broadcast = IN6_ARE_ADDR_EQUAL(&relay->server.addr6, &multicast); |
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if (relay->port != DHCPV6_SERVER_PORT) |
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sprintf(daemon->namebuff + strlen(daemon->namebuff), "#%u", relay->port); |
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} |
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#endif |
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if (relay->interface) |
if (relay->interface) |
my_syslog(MS_DHCP | LOG_INFO, _("DHCP relay from %s to %s via %s"), daemon->addrbuff, daemon->namebuff, relay->interface); | { |
| if (broadcast) |
| my_syslog(MS_DHCP | LOG_INFO, _("DHCP relay from %s via %s"), daemon->addrbuff, relay->interface); |
| else |
| my_syslog(MS_DHCP | LOG_INFO, _("DHCP relay from %s to %s via %s"), daemon->addrbuff, daemon->namebuff, relay->interface); |
| } |
else |
else |
my_syslog(MS_DHCP | LOG_INFO, _("DHCP relay from %s to %s"), daemon->addrbuff, daemon->namebuff); |
my_syslog(MS_DHCP | LOG_INFO, _("DHCP relay from %s to %s"), daemon->addrbuff, daemon->namebuff); |
} |
} |