680 lines
22 KiB
C
680 lines
22 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include "dhcp-internal.h"
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#include "dhcp6-internal.h"
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#include "escape.h"
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#include "in-addr-util.h"
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#include "networkd-dhcp-common.h"
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#include "networkd-network.h"
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#include "parse-util.h"
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#include "string-table.h"
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#include "strv.h"
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#include "web-util.h"
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int config_parse_dhcp(
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const char* unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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AddressFamily *dhcp = data, s;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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/* Note that this is mostly like
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* config_parse_address_family(), except that it
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* understands some old names for the enum values */
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s = address_family_from_string(rvalue);
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if (s < 0) {
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/* Previously, we had a slightly different enum here,
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* support its values for compatibility. */
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if (streq(rvalue, "none"))
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s = ADDRESS_FAMILY_NO;
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else if (streq(rvalue, "v4"))
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s = ADDRESS_FAMILY_IPV4;
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else if (streq(rvalue, "v6"))
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s = ADDRESS_FAMILY_IPV6;
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else if (streq(rvalue, "both"))
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s = ADDRESS_FAMILY_YES;
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else {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"Failed to parse DHCP option, ignoring: %s", rvalue);
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return 0;
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}
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log_syntax(unit, LOG_WARNING, filename, line, 0,
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"DHCP=%s is deprecated, please use DHCP=%s instead.",
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rvalue, address_family_to_string(s));
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}
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*dhcp = s;
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return 0;
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}
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int config_parse_dhcp_use_dns(
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const char* unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = parse_boolean(rvalue);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse UseDNS=%s, ignoring assignment: %m", rvalue);
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return 0;
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}
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network->dhcp_use_dns = r;
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network->dhcp6_use_dns = r;
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return 0;
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}
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int config_parse_dhcp_use_sip(
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const char* unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = parse_boolean(rvalue);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse UseSIP=%s, ignoring assignment: %m", rvalue);
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return 0;
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}
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network->dhcp_use_sip = r;
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return 0;
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}
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int config_parse_dhcp_use_ntp(
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const char* unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = parse_boolean(rvalue);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse UseNTP=%s, ignoring assignment: %m", rvalue);
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return 0;
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}
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network->dhcp_use_ntp = r;
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network->dhcp6_use_ntp = r;
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return 0;
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}
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int config_parse_section_route_table(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = data;
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uint32_t rt;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = safe_atou32(rvalue, &rt);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse RouteTable=%s, ignoring assignment: %m", rvalue);
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return 0;
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}
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if (STRPTR_IN_SET(section, "DHCP", "DHCPv4")) {
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network->dhcp_route_table = rt;
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network->dhcp_route_table_set = true;
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} else { /* section is IPv6AcceptRA */
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network->ipv6_accept_ra_route_table = rt;
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network->ipv6_accept_ra_route_table_set = true;
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}
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return 0;
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}
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int config_parse_iaid(const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = data;
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uint32_t iaid;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(network);
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r = safe_atou32(rvalue, &iaid);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Unable to read IAID, ignoring assignment: %s", rvalue);
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return 0;
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}
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network->iaid = iaid;
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network->iaid_set = true;
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return 0;
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}
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int config_parse_dhcp6_pd_hint(
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const char* unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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Network *network = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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r = in_addr_prefix_from_string(rvalue, AF_INET6, (union in_addr_union *) &network->dhcp6_pd_address, &network->dhcp6_pd_length);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse PrefixDelegationHint=%s, ignoring assignment", rvalue);
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return 0;
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}
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if (network->dhcp6_pd_length < 1 || network->dhcp6_pd_length > 128) {
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log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid prefix length='%d', ignoring assignment", network->dhcp6_pd_length);
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network->dhcp6_pd_length = 0;
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return 0;
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}
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return 0;
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}
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int config_parse_dhcp_user_class(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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char ***l = data;
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int r;
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assert(l);
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assert(lvalue);
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assert(rvalue);
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if (isempty(rvalue)) {
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*l = strv_free(*l);
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return 0;
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}
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for (;;) {
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_cleanup_free_ char *w = NULL;
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r = extract_first_word(&rvalue, &w, NULL, EXTRACT_CUNESCAPE|EXTRACT_UNQUOTE);
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if (r == -ENOMEM)
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return log_oom();
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to split user classes option, ignoring: %s", rvalue);
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break;
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}
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if (r == 0)
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break;
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if (ltype == AF_INET) {
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if (strlen(w) > UINT8_MAX) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"%s length is not in the range 1-255, ignoring.", w);
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continue;
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}
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} else {
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if (strlen(w) > UINT16_MAX) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"%s length is not in the range 1-65535, ignoring.", w);
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continue;
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}
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}
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r = strv_push(l, w);
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if (r < 0)
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return log_oom();
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w = NULL;
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}
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return 0;
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}
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int config_parse_dhcp6_mud_url(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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_cleanup_free_ char *unescaped = NULL;
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Network *network = data;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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if (isempty(rvalue)) {
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network->dhcp6_mudurl = mfree(network->dhcp6_mudurl);
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return 0;
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}
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r = cunescape(rvalue, 0, &unescaped);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to Failed to unescape MUD URL, ignoring: %s", rvalue);
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return 0;
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}
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if (!http_url_is_valid(unescaped) || strlen(unescaped) > UINT8_MAX) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"Failed to parse MUD URL '%s', ignoring: %m", rvalue);
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return 0;
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}
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return free_and_replace(network->dhcp6_mudurl, unescaped);
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}
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int config_parse_dhcp_send_option(
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const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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unsigned section_line,
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const char *lvalue,
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int ltype,
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const char *rvalue,
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void *data,
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void *userdata) {
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_cleanup_(sd_dhcp_option_unrefp) sd_dhcp_option *opt4 = NULL, *old4 = NULL;
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_cleanup_(sd_dhcp6_option_unrefp) sd_dhcp6_option *opt6 = NULL, *old6 = NULL;
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_cleanup_free_ char *word = NULL, *q = NULL;
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OrderedHashmap **options = data;
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union in_addr_union addr;
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DHCPOptionDataType type;
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uint8_t u8, uint8_data;
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uint16_t u16, uint16_data;
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uint32_t uint32_data;
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const void *udata;
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const char *p;
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ssize_t sz;
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int r;
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assert(filename);
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assert(lvalue);
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assert(rvalue);
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assert(data);
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if (isempty(rvalue)) {
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*options = ordered_hashmap_free(*options);
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return 0;
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}
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p = rvalue;
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r = extract_first_word(&p, &word, ":", 0);
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if (r == -ENOMEM)
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return log_oom();
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if (r <= 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Invalid DHCP option, ignoring assignment: %s", rvalue);
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return 0;
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}
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if (ltype == AF_INET6) {
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r = safe_atou16(word, &u16);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Invalid DHCP option, ignoring assignment: %s", rvalue);
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return 0;
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}
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if (u16 < 1 || u16 >= UINT16_MAX) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"Invalid DHCP option, valid range is 1-65535, ignoring assignment: %s", rvalue);
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return 0;
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}
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} else {
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r = safe_atou8(word, &u8);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Invalid DHCP option, ignoring assignment: %s", rvalue);
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return 0;
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}
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if (u8 < 1 || u8 >= UINT8_MAX) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"Invalid DHCP option, valid range is 1-254, ignoring assignment: %s", rvalue);
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return 0;
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}
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}
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word = mfree(word);
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r = extract_first_word(&p, &word, ":", 0);
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if (r == -ENOMEM)
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return log_oom();
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if (r <= 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Invalid DHCP option, ignoring assignment: %s", rvalue);
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return 0;
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}
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type = dhcp_option_data_type_from_string(word);
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if (type < 0) {
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log_syntax(unit, LOG_ERR, filename, line, 0,
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"Invalid DHCP option data type, ignoring assignment: %s", p);
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return 0;
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}
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switch(type) {
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case DHCP_OPTION_DATA_UINT8:{
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r = safe_atou8(p, &uint8_data);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse DHCP uint8 data, ignoring assignment: %s", p);
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return 0;
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}
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udata = &uint8_data;
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sz = sizeof(uint8_t);
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break;
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}
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case DHCP_OPTION_DATA_UINT16:{
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r = safe_atou16(p, &uint16_data);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse DHCP uint16 data, ignoring assignment: %s", p);
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return 0;
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}
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udata = &uint16_data;
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sz = sizeof(uint16_t);
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break;
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}
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case DHCP_OPTION_DATA_UINT32: {
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r = safe_atou32(p, &uint32_data);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse DHCP uint32 data, ignoring assignment: %s", p);
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return 0;
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}
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udata = &uint32_data;
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sz = sizeof(uint32_t);
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break;
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}
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case DHCP_OPTION_DATA_IPV4ADDRESS: {
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r = in_addr_from_string(AF_INET, p, &addr);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse DHCP ipv4address data, ignoring assignment: %s", p);
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return 0;
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}
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udata = &addr.in;
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sz = sizeof(addr.in.s_addr);
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break;
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}
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case DHCP_OPTION_DATA_IPV6ADDRESS: {
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r = in_addr_from_string(AF_INET6, p, &addr);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to parse DHCP ipv6address data, ignoring assignment: %s", p);
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return 0;
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}
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udata = &addr.in6;
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sz = sizeof(addr.in6.s6_addr);
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break;
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}
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case DHCP_OPTION_DATA_STRING:
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sz = cunescape(p, UNESCAPE_ACCEPT_NUL, &q);
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if (sz < 0) {
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log_syntax(unit, LOG_ERR, filename, line, sz,
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"Failed to decode DHCP option data, ignoring assignment: %s", p);
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}
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udata = q;
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break;
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default:
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return -EINVAL;
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}
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if (ltype == AF_INET6) {
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r = sd_dhcp6_option_new(u16, udata, sz, &opt6);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to store DHCP option '%s', ignoring assignment: %m", rvalue);
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return 0;
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}
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r = ordered_hashmap_ensure_allocated(options, &dhcp6_option_hash_ops);
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if (r < 0)
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return log_oom();
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/* Overwrite existing option */
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old6 = ordered_hashmap_get(*options, UINT_TO_PTR(u16));
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r = ordered_hashmap_replace(*options, UINT_TO_PTR(u16), opt6);
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if (r < 0) {
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log_syntax(unit, LOG_ERR, filename, line, r,
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"Failed to store DHCP option '%s', ignoring assignment: %m", rvalue);
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return 0;
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}
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TAKE_PTR(opt6);
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} else {
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r = sd_dhcp_option_new(u8, udata, sz, &opt4);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"Failed to store DHCP option '%s', ignoring assignment: %m", rvalue);
|
|
return 0;
|
|
}
|
|
|
|
r = ordered_hashmap_ensure_allocated(options, &dhcp_option_hash_ops);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
/* Overwrite existing option */
|
|
old4 = ordered_hashmap_get(*options, UINT_TO_PTR(u8));
|
|
r = ordered_hashmap_replace(*options, UINT_TO_PTR(u8), opt4);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"Failed to store DHCP option '%s', ignoring assignment: %m", rvalue);
|
|
return 0;
|
|
}
|
|
TAKE_PTR(opt4);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int config_parse_dhcp_request_options(
|
|
const char *unit,
|
|
const char *filename,
|
|
unsigned line,
|
|
const char *section,
|
|
unsigned section_line,
|
|
const char *lvalue,
|
|
int ltype,
|
|
const char *rvalue,
|
|
void *data,
|
|
void *userdata) {
|
|
|
|
Network *network = data;
|
|
const char *p;
|
|
int r;
|
|
|
|
assert(filename);
|
|
assert(lvalue);
|
|
assert(rvalue);
|
|
assert(data);
|
|
|
|
if (isempty(rvalue)) {
|
|
if (ltype == AF_INET)
|
|
network->dhcp_request_options = set_free(network->dhcp_request_options);
|
|
else
|
|
network->dhcp6_request_options = set_free(network->dhcp6_request_options);
|
|
|
|
return 0;
|
|
}
|
|
|
|
for (p = rvalue;;) {
|
|
_cleanup_free_ char *n = NULL;
|
|
uint32_t i;
|
|
|
|
r = extract_first_word(&p, &n, NULL, 0);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"Failed to parse DHCP request option, ignoring assignment: %s",
|
|
rvalue);
|
|
return 0;
|
|
}
|
|
if (r == 0)
|
|
return 0;
|
|
|
|
r = safe_atou32(n, &i);
|
|
if (r < 0) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"DHCP request option is invalid, ignoring assignment: %s", n);
|
|
continue;
|
|
}
|
|
|
|
if (i < 1 || i >= UINT8_MAX) {
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"DHCP request option is invalid, valid range is 1-254, ignoring assignment: %s", n);
|
|
continue;
|
|
}
|
|
|
|
if (ltype == AF_INET)
|
|
r = set_ensure_allocated(&network->dhcp_request_options, NULL);
|
|
else
|
|
r = set_ensure_allocated(&network->dhcp6_request_options, NULL);
|
|
if (r < 0)
|
|
return log_oom();
|
|
|
|
if (ltype == AF_INET)
|
|
r = set_put(network->dhcp_request_options, UINT32_TO_PTR(i));
|
|
else
|
|
r = set_put(network->dhcp6_request_options, UINT32_TO_PTR(i));
|
|
if (r < 0)
|
|
log_syntax(unit, LOG_ERR, filename, line, r,
|
|
"Failed to store DHCP request option '%s', ignoring assignment: %m", n);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_use_domains, dhcp_use_domains, DHCPUseDomains,
|
|
"Failed to parse DHCP use domains setting");
|
|
|
|
static const char* const dhcp_use_domains_table[_DHCP_USE_DOMAINS_MAX] = {
|
|
[DHCP_USE_DOMAINS_NO] = "no",
|
|
[DHCP_USE_DOMAINS_ROUTE] = "route",
|
|
[DHCP_USE_DOMAINS_YES] = "yes",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(dhcp_use_domains, DHCPUseDomains, DHCP_USE_DOMAINS_YES);
|
|
|
|
static const char * const dhcp_option_data_type_table[_DHCP_OPTION_DATA_MAX] = {
|
|
[DHCP_OPTION_DATA_UINT8] = "uint8",
|
|
[DHCP_OPTION_DATA_UINT16] = "uint16",
|
|
[DHCP_OPTION_DATA_UINT32] = "uint32",
|
|
[DHCP_OPTION_DATA_STRING] = "string",
|
|
[DHCP_OPTION_DATA_IPV4ADDRESS] = "ipv4address",
|
|
[DHCP_OPTION_DATA_IPV6ADDRESS] = "ipv6address",
|
|
};
|
|
|
|
DEFINE_STRING_TABLE_LOOKUP(dhcp_option_data_type, DHCPOptionDataType);
|