Merge pull request #14055 from yuwata/network-send-option-takes-type-field

network: make SendOption= also take type field

man/systemd.network.xml

@@ -1642,11 +1642,13 @@
         <varlistentry>
           <term><varname>SendOption=</varname></term>
           <listitem>
-            <para>Send an arbitrary option in the DHCPv4 request. Takes a DHCP option number and an arbitrary
-            data string separated with a colon
-            (<literal><replaceable>option</replaceable>:<replaceable>value</replaceable></literal>). The
-            option number must be an interger in the range 1..254. Special characters in the data string may
-            be escaped using
+            <para>Send an arbitrary option in the DHCPv4 request. Takes a DHCP option number, data type
+            and data separated with a colon (<literal><replaceable>option</replaceable>:
+            <replaceable>type</replaceable>:<replaceable>value</replaceable></literal>). The option
+            number must be an interger in the range 1..254. The type takes one of
+            <literal>uint8</literal>, <literal>uint16</literal>, <literal>uint32</literal>,
+            <literal>ipv4address</literal>, or <literal>string</literal>.
+            Special characters in the data string may be escaped using
             <ulink url="https://en.wikipedia.org/wiki/Escape_sequences_in_C#Table_of_escape_sequences">C-style
             escapes</ulink>. This option can be specified multiple times. If an empty string is specified,
             then all options specified earlier are cleared. Defaults to unset.</para>

src/network/networkd-dhcp-common.c

@@ -273,3 +273,13 @@ static const char* const dhcp_use_domains_table[_DHCP_USE_DOMAINS_MAX] = {
 };
 
 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",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(dhcp_option_data_type, DHCPOptionDataType);

src/network/networkd-dhcp-common.h

@@ -15,6 +15,16 @@ typedef enum DHCPUseDomains {
         _DHCP_USE_DOMAINS_INVALID = -1,
 } DHCPUseDomains;
 
+typedef enum DHCPOptionDataType {
+        DHCP_OPTION_DATA_UINT8,
+        DHCP_OPTION_DATA_UINT16,
+        DHCP_OPTION_DATA_UINT32,
+        DHCP_OPTION_DATA_STRING,
+        DHCP_OPTION_DATA_IPV4ADDRESS,
+        _DHCP_OPTION_DATA_MAX,
+        _DHCP_OPTION_DATA_INVALID,
+} DHCPOptionDataType;
+
 typedef struct DUID {
         /* Value of Type in [DHCP] section */
         DUIDType type;
@@ -27,6 +37,9 @@ typedef struct DUID {
 const char* dhcp_use_domains_to_string(DHCPUseDomains p) _const_;
 DHCPUseDomains dhcp_use_domains_from_string(const char *s) _pure_;
 
+const char *dhcp_option_data_type_to_string(DHCPOptionDataType d) _const_;
+DHCPOptionDataType dhcp_option_data_type_from_string(const char *d) _pure_;
+
 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp);
 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_use_dns);
 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_use_domains);

src/network/networkd-dhcp-server.c

@@ -480,16 +480,6 @@ int config_parse_dhcp_server_sip(
         }
 }
 
-static const char * const dhcp_raw_option_data_type_table[_DHCP_RAW_OPTION_DATA_MAX] = {
-        [DHCP_RAW_OPTION_DATA_UINT8]      = "uint8",
-        [DHCP_RAW_OPTION_DATA_UINT16]     = "uint16",
-        [DHCP_RAW_OPTION_DATA_UINT32]     = "uint32",
-        [DHCP_RAW_OPTION_DATA_STRING]     = "string",
-        [DHCP_RAW_OPTION_DATA_IPV4ADDRESS] = "ipv4address",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(dhcp_raw_option_data_type, DHCPRawOption);
-
 int config_parse_dhcp_server_raw_option_data(
                 const char *unit,
                 const char *filename,
@@ -505,11 +495,11 @@ int config_parse_dhcp_server_raw_option_data(
         _cleanup_(sd_dhcp_raw_option_unrefp) sd_dhcp_raw_option *opt = NULL, *old = NULL;
         _cleanup_free_ char *word = NULL, *q = NULL;
         union in_addr_union addr;
+        DHCPOptionDataType type;
         Network *network = data;
         uint16_t uint16_data;
         uint32_t uint32_data;
         uint8_t uint8_data;
-        DHCPRawOption type;
         const char *p;
         void *udata;
         ssize_t sz;
@@ -559,16 +549,15 @@ int config_parse_dhcp_server_raw_option_data(
                 return 0;
         }
 
-        r = dhcp_raw_option_data_type_from_string(word);
-        if (r < 0) {
-                log_syntax(unit, LOG_ERR, filename, line, r,
+        type = dhcp_option_data_type_from_string(word);
+        if (type < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, 0,
                            "Invalid DHCP server send data type, ignoring assignment: %s", p);
                 return 0;
         }
 
-        type = r;
         switch(type) {
-        case DHCP_RAW_OPTION_DATA_UINT8:{
+        case DHCP_OPTION_DATA_UINT8:{
                 r = safe_atou8(p, &uint8_data);
                 if (r < 0) {
                         log_syntax(unit, LOG_ERR, filename, line, r,
@@ -580,7 +569,7 @@ int config_parse_dhcp_server_raw_option_data(
                 sz = sizeof(uint8_t);
                 break;
         }
-        case DHCP_RAW_OPTION_DATA_UINT16:{
+        case DHCP_OPTION_DATA_UINT16:{
                 r = safe_atou16(p, &uint16_data);
                 if (r < 0) {
                         log_syntax(unit, LOG_ERR, filename, line, r,
@@ -592,7 +581,7 @@ int config_parse_dhcp_server_raw_option_data(
                 sz = sizeof(uint16_t);
                 break;
         }
-        case DHCP_RAW_OPTION_DATA_UINT32: {
+        case DHCP_OPTION_DATA_UINT32: {
                 r = safe_atou32(p, &uint32_data);
                 if (r < 0) {
                         log_syntax(unit, LOG_ERR, filename, line, r,
@@ -605,7 +594,7 @@ int config_parse_dhcp_server_raw_option_data(
 
                 break;
         }
-        case DHCP_RAW_OPTION_DATA_IPV4ADDRESS: {
+        case DHCP_OPTION_DATA_IPV4ADDRESS: {
                 r = in_addr_from_string(AF_INET, p, &addr);
                 if (r < 0) {
                         log_syntax(unit, LOG_ERR, filename, line, r,
@@ -617,7 +606,7 @@ int config_parse_dhcp_server_raw_option_data(
                 sz = sizeof(addr.in.s_addr);
                 break;
         }
-        case DHCP_RAW_OPTION_DATA_STRING:
+        case DHCP_OPTION_DATA_STRING:
                 sz = cunescape(p, 0, &q);
                 if (sz < 0) {
                         log_syntax(unit, LOG_ERR, filename, line, sz,

src/network/networkd-dhcp-server.h

@@ -7,19 +7,6 @@
 
 typedef struct Link Link;
 
-typedef enum DHCPRawOption {
-        DHCP_RAW_OPTION_DATA_UINT8,
-        DHCP_RAW_OPTION_DATA_UINT16,
-        DHCP_RAW_OPTION_DATA_UINT32,
-        DHCP_RAW_OPTION_DATA_STRING,
-        DHCP_RAW_OPTION_DATA_IPV4ADDRESS,
-        _DHCP_RAW_OPTION_DATA_MAX,
-        _DHCP_RAW_OPTION_DATA_INVALID,
-} DHCPRawOption;
-
-const char *dhcp_raw_option_data_type_to_string(DHCPRawOption d) _const_;
-DHCPRawOption dhcp_raw_option_data_type_from_string(const char *d) _pure_;
-
 int dhcp4_server_configure(Link *link);
 
 CONFIG_PARSER_PROTOTYPE(config_parse_dhcp_server_dns);

src/network/networkd-dhcp4.c

@@ -1580,9 +1580,14 @@ int config_parse_dhcp_send_option(
 
         _cleanup_(sd_dhcp_option_unrefp) sd_dhcp_option *opt = NULL, *old = NULL;
         _cleanup_free_ char *word = NULL, *q = NULL;
+        union in_addr_union addr;
+        DHCPOptionDataType type;
         Network *network = data;
+        uint8_t u, uint8_data;
+        uint16_t uint16_data;
+        uint32_t uint32_data;
         const char *p;
-        uint8_t u;
+        void *udata;
         ssize_t sz;
         int r;
 
@@ -1618,14 +1623,87 @@ int config_parse_dhcp_send_option(
                 return 0;
         }
 
+        free(word);
+        r = extract_first_word(&p, &word, ":", 0);
+        if (r == -ENOMEM)
+                return log_oom();
+        if (r <= 0) {
+                log_syntax(unit, LOG_ERR, filename, line, r,
+                           "Invalid DHCP send option, ignoring assignment: %s", rvalue);
+                return 0;
+        }
+
+        type = dhcp_option_data_type_from_string(word);
+        if (type < 0) {
+                log_syntax(unit, LOG_ERR, filename, line, 0,
+                           "Invalid DHCP send data type, ignoring assignment: %s", p);
+                return 0;
+        }
+
+        switch(type) {
+        case DHCP_OPTION_DATA_UINT8:{
+                r = safe_atou8(p, &uint8_data);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r,
+                                   "Failed to parse DHCPv4 uint8 data, ignoring assignment: %s", p);
+                        return 0;
+                }
+
+                udata = &uint8_data;
+                sz = sizeof(uint8_t);
+                break;
+        }
+        case DHCP_OPTION_DATA_UINT16:{
+                r = safe_atou16(p, &uint16_data);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r,
+                                   "Failed to parse DHCPv4 uint16 data, ignoring assignment: %s", p);
+                        return 0;
+                }
+
+                udata = &uint16_data;
+                sz = sizeof(uint16_t);
+                break;
+        }
+        case DHCP_OPTION_DATA_UINT32: {
+                r = safe_atou32(p, &uint32_data);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r,
+                                   "Failed to parse DHCPv4 uint32 data, ignoring assignment: %s", p);
+                        return 0;
+                }
+
+                udata = &uint32_data;
+                sz = sizeof(uint32_t);
+
+                break;
+        }
+        case DHCP_OPTION_DATA_IPV4ADDRESS: {
+                r = in_addr_from_string(AF_INET, p, &addr);
+                if (r < 0) {
+                        log_syntax(unit, LOG_ERR, filename, line, r,
+                                   "Failed to parse DHCPv4 ipv4address data, ignoring assignment: %s", p);
+                        return 0;
+                }
+
+                udata = &addr.in;
+                sz = sizeof(addr.in.s_addr);
+                break;
+        }
+        case DHCP_OPTION_DATA_STRING:
                 sz = cunescape(p, 0, &q);
                 if (sz < 0) {
                         log_syntax(unit, LOG_ERR, filename, line, sz,
                                    "Failed to decode option data, ignoring assignment: %s", p);
-                return 0;
                 }
 
-        r = sd_dhcp_option_new(u, q, sz, &opt);
+                udata = q;
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        r = sd_dhcp_option_new(u, udata, sz, &opt);
         if (r < 0) {
                 log_syntax(unit, LOG_ERR, filename, line, r,
                            "Failed to store DHCP send option '%s', ignoring assignment: %m", rvalue);