449 lines
14 KiB
C
449 lines
14 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include "dhcp-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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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_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 *opt = NULL, *old = 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 u, uint8_data;
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uint16_t 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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r = safe_atou8(word, &u);
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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 (u < 1 || u >= 255) {
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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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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 DHCPv4 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 DHCPv4 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 DHCPv4 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 DHCPv4 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_STRING:
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sz = cunescape(p, 0, &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 DHCPv4 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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r = sd_dhcp_option_new(u, udata, sz, &opt);
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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 DHCPv4 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, &dhcp_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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old = ordered_hashmap_remove(*options, UINT_TO_PTR(u));
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r = ordered_hashmap_put(*options, UINT_TO_PTR(u), opt);
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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 DHCPv4 option '%s', ignoring assignment: %m", rvalue);
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return 0;
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}
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TAKE_PTR(opt);
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return 0;
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}
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DEFINE_CONFIG_PARSE_ENUM(config_parse_dhcp_use_domains, dhcp_use_domains, DHCPUseDomains,
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"Failed to parse DHCP use domains setting");
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static const char* const dhcp_use_domains_table[_DHCP_USE_DOMAINS_MAX] = {
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[DHCP_USE_DOMAINS_NO] = "no",
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[DHCP_USE_DOMAINS_ROUTE] = "route",
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[DHCP_USE_DOMAINS_YES] = "yes",
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};
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DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN(dhcp_use_domains, DHCPUseDomains, DHCP_USE_DOMAINS_YES);
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static const char * const dhcp_option_data_type_table[_DHCP_OPTION_DATA_MAX] = {
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[DHCP_OPTION_DATA_UINT8] = "uint8",
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[DHCP_OPTION_DATA_UINT16] = "uint16",
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[DHCP_OPTION_DATA_UINT32] = "uint32",
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[DHCP_OPTION_DATA_STRING] = "string",
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[DHCP_OPTION_DATA_IPV4ADDRESS] = "ipv4address",
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};
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DEFINE_STRING_TABLE_LOOKUP(dhcp_option_data_type, DHCPOptionDataType);
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