Network Configuration Manager - C API

Photon OS 2.0 provides a C API for the Network Configuration Manager.

• About the Network Configuration Manager C API
• Interface Configuration APIs
• IP Address Configuration APIs
• Route Configuration APIs
• DNS Configuration APIs
• DHCP Options DUID and IAID Configuration APIs
• NTP Configuration APIs
• Service Management APIs

About the Network Configuration Manager C API

Use the Network Configuration Manager C API to simplify common network configuration tasks for:

• interfaces
• IP addresses (IPv4 and IPv6 addresses)
• routes
• DNS server and domain settings
• DHCP DUID and IAID settings
• NTP server settings
• service management
• object parameters (interfaces and files)

Header File

Header files for all the C APIs are defined in the following location:

https://github.com/ vmware /pmd/tree/master/include

To install the Network Configuration Manager header file, run the following command:

tdnf install netmgmt-devel n Once installed, you can reference the header file in the following location:

/usr/include/netmgmt/netmgr.h

Freeing Memory

For all get APIs that take a pointer-to-pointer parameter, the caller has the responsibility to free the memory upon successful response from API by calling free().

Error Codes

All C API calls return 0 for success, or one of the following error codes for failure.

• 4097 - NM_ERR_INVALID_PARAMETER
• 4098 - NM_ERR_NOT_SUPPORTED
• 4099 - NM_ERR_OUT_OF_MEMORY
• 4100 - NM_ERR_VALUE_NOT_FOUND
• 4101 - NM_ERR_VALUE_EXISTS
• 4102 - NM_ERR_INVALID_INTERFACE
• 4103 - NM_ERR_INVALID_ADDRESS
• 4104 - NM_ERR_INVALID_MODE
• 4105 - NM_ERR_BAD_CONFIG_FILE
• 4106 - NM_ERR_WRITE_FAILED
• 4107 - NM_ERR_TIME_OUT
• 4108 - NM_ERR_DHCP_TIME_OUT

Use nm_get_error_info to retrieve information about an error code.

 const char \*
 nm_get_error_info(
     uint32_t nmErrCode
 );``

Interface Configuration APIs

The Photon OS 2.0 network manager C API enables you to manage network interfaces.

Structure Declarations

Link Mode

Description

Link mode. Available settings:

• LINK_AUTO - the specified interface is managed and configured by systemd network manager
• LINK_MANUAL - systemd will not bring up or configure the specified interface
• LINK_MODE_UNKNOWN - the link mode is unknown

Declaration

 typedef enum _NET_LINK_MODE
 {
     LINK_AUTO = 0,
     LINK_MANUAL,
     LINK_MODE_UNKNOWN
 } NET_LINK_MODE;``

Link State

Description

Link state. Available settings:

• LINK_DOWN - the link is being administratively down or has no carrier signal
• LINK_UP - the link is configured up and has carrier signal
• LINK_STATE_UNKNOWN - link state is unknown

Declaration

 typedef enum _NET_LINK_STATE
 {
     LINK_DOWN = 0,
     LINK_UP,
     LINK_STATE_UNKNOWN,
 } NET_LINK_STATE;

Link Information

Description

Link information. Includes the following information:

• pszInterfaceName - interface name
• pszMacAddress - interface hardware address specified in a colon-separated format (for example: "00:0c:29:99:a5:7b")
• mtu - maximum transmission unit (MTU)
• mode - link mode (see above)
• state - link state (see above)

Declaration

 typedef struct _NET_LINK_INFO
 {
     struct _NET_LINK_INFO \*pNext;
     char \*pszInterfaceName;
     char \*pszMacAddress;
     uint32_t mtu;
     NET_LINK_MODE mode;
     NET_LINK_STATE state;
 } NET_LINK_INFO, \*PNET_LINK_INFO;

nm_set_link_mac_addr

Description

Set the MAC address of the interface.

Declaration

uint32_t

nm_set_link_mac_addr(

     const char \*pszInterfaceName,
     const char \*pszMacAddress
 );

Arguments

• pszInterfaceName - interface name
• pszMacAddress - interface hardware address specified in a colon-separated format (for example: "00:0c:29:99:a5:7b")

Returns

• success: 0
• failure: error code

nm_get_link_mac_addr

Description

Get the MAC address of the interface.

Declaration

uint32_t
 nm_get_link_mac_addr(
     const char \*pszInterfaceName,
     char \*\*ppszMacAddress
 );

Arguments

• pszInterfaceName - interface name
• ppszMacAddress - interface hardware address specified in a colon-separated format (for example: "00:0c:29:99:a5:7b")

Returns

• success: 0
• failure: error code

nm_set_link_mode

Description

Set the mode of the interface (auto or manual).

Declaration

uint32_t
 nm_set_link_mode(
     const char \*pszInterfaceName,
     NET_LINK_MODE mode
 );

Arguments

• pszInterfaceName - interface name
• mode - link mode. One of the following values:
  • LINK_AUTO - the specified interface is managed and configured by systemd network manager
  • LINK_MANUAL - systemd will not bring up or configure the specified interface
  • LINK_MODE_UNKNOWN - the link mode is unknown

Returns

• success: 0
• failure: error code

nm_get_link_mode

Description

Get the mode of the interface (auto or manual).

Declaration

uint32_t
 nm_get_link_mode(
     const char \*pszInterfaceName,
     NET_LINK_MODE \*pLinkMode
 );

Arguments

• pszInterfaceName - interface name
• pLinkMode - link mode. One of the following values:
  • LINK_AUTO - the specified interface is managed and configured by systemd network manager
  • LINK_MANUAL - systemd will not bring up or configure the specified interface
  • LINK_MODE_UNKNOWN - the link mode is unknown

Returns

• success: 0
• failure: error code

nm_set_link_mtu

Description

Set the maximum transmission unit (MTU) of the interface.

Declaration

uint32_t
 nm_set_link_mtu(
     const char \*pszInterfaceName,
     uint32_t mtu
 );

Arguments

• pszInterfaceName - interface name
• mtu - maximum transmission unit (MTU)

Returns

• success: 0
• failure: error code

nm_get_link_mtu

Description

Get the maximum transmission unit (MTU) of the interface.

Declaration

nm_get_link_mtu
 uint32_t
 nm_get_link_mtu(
     const char \*pszInterfaceName,
     uint32_t \*pMtu
 );

Arguments

• pszInterfaceName - interface name
• pMtu - maximum transmission unit (MTU)

Returns

• success: 0
• failure: error code

nm_set_link_state

Description

Set the link state of the interface (up or down).

Declaration

 uint32_t
 nm_set_link_state(
     const char \*pszInterfaceName,
     NET_LINK_STATE state
 );

Arguments

• pszInterfaceName - interface name
• state - link state. One of the following values:
  • LINK_DOWN - the link is being administratively down or has no carrier signal.
  • LINK_UP - the link is configured up and has carrier signal.
  • LINK_STATE_UNKNOWN - the link state is unknown

Returns

• success: 0
• failure: error code

nm_get_link_state

Description

Get the link state of the interface (up or down).

Declaration

uint32_t
 nm_get_link_state(
     const char \*pszInterfaceName,
     NET_LINK_STATE \*pLinkState
 );

Arguments

• pszInterfaceName - interface name
• pLinkState - link state. One of the following values:
  • LINK_DOWN - the link is being administratively down or has no carrier signal
  • LINK_UP - the link is configured up and has carrier signal
  • LINK_STATE_UNKNOWN - the link state is unknown

Returns

• success: 0
• failure: error code

nm_ifup

Description

Set the specified interface state to UP. Additionally, if the interface is configured to have an IP address, it waits for the interface to acquire the IP address, and then updates neighbors of its IP address via the address resolution protocol (ARP) messages.

Declaration

 uint32_t
 nm_ifup(
     const char \*pszInterfaceName
 );

Arguments

• pszInterfaceName - interface name

Returns

• success: 0
• failure: error code

nm_ifdown

Description

Set the specified interface state to DOWN.

Declaration

uint32_t
 nm_ifdown(
     const char \*pszInterfaceName
 );

Arguments

• pszInterfaceName - interface name

Returns

• success: 0
• failure: error code

nm_get_link_info

Description

Get link information for the interface. The caller is responsible for freeing ppLinkInfo by calling nm_free_link_info.

Declaration

uint32_t
 nm_get_link_info(
     const char \*pszInterfaceName,
     NET_LINK_INFO \*\*ppLinkInfo
 );

Arguments

• pszInterfaceName - interface name
• ppLinkInfo, which includes the following information:
  • *pszInterfaceName - interface name
  • *pszMacAddress - interface hardware address specified in a colon-separated format (for example: "00:0c:29:99:a5:7b")
  • mtu - maximum transmission unit (MTU)
  • mode - One of the following values:
    • LINK_AUTO - the specified interface is managed and configured by systemd network manager
    • LINK_MANUAL - systemd will not bring up or configure the specified interface
    • LINK_MODE_UNKNOWN - the link mode is unknown
  • state - One of the following values:
    • LINK_DOWN - the link is being administratively down or has no carrier signal
    • LINK_UP - the link is configured up and has carrier signal
    • LINK_STATE_UNKNOWN - the link state is unknown

Returns

• success: 0
• failure: error code

nm_free_link_info

Description

Frees the NET_LINK_INFO structure returned by a successful nm_get_link_info call.

Declaration

void
 nm_free_link_info(
     NET_LINK_INFO \*pNetLinkInfo
 );

Arguments

• pNetLinkInfo, which includes the following information:
  • *pszInterfaceName - interface name
  • *pszMacAddress - interface hardware address specified in a colon-separated format (for example: "00:0c:29:99:a5:7b")
  • mtu - maximum transmission unit (MTU)
  • mode - One of the following values:
    • LINK_AUTO - the specified interface is managed and configured by systemd network manager
    • LINK_MANUAL - systemd will not bring up or configure the specified interface
    • LINK_MODE_UNKNOWN - the link mode is unknown
  • state - One of the following values:
    • LINK_DOWN - the link is being administratively down or has no carrier signal
    • LINK_UP - the link is configured up and has carrier signal
    • LINK_STATE_UNKNOWN - the link state is unknown

Returns

• success: 0
• failure: error code

IP Address Configuration APIs

The Photon OS 2.0 network manager C API enables you to manage IP addresses for interfaces that are managed by systemd network manager.

Structure Declarations

IP Address Mode

Description

Defines the IP address mode. One of the following values:

• IPV4_ADDR_MODE_NONE - no IPv4 address configured on the interface
• IPV4_ADDR_MODE_STATIC - the interface is configured with a static IPv4 address
• IPV4_ADDR_MODE_DHCP - the interface is configured with a DHCP IPv4 address

Declaration

 typedef enum _NET_IPV4_ADDR_MODE
 {
     IPV4_ADDR_MODE_NONE = 0,
     IPV4_ADDR_MODE_STATIC,
     IPV4_ADDR_MODE_DHCP,
     IPV4_ADDR_MODE_MAX
 } NET_IPV4_ADDR_MODE;

Address Type

Description

Defines the type of IP address. One of the following options:

• STATIC_IPV4 - static IPv4 address
• STATIC_IPV6 - static IPv6 address
• DHCP_IPV4 - DHCP IPv4 address
• DHCP_IPV6 - DHCP IPv6 address
• AUTO_IPV6 - stateless dynamic IPv6 address
• LINK_LOCAL_IPV6 - link local IPv6 address

Declaration

 typedef enum _NET_ADDR_TYPE
 {
     STATIC_IPV4        =  0x00000001,
     STATIC_IPV6        =  0x00000002,
     DHCP_IPV4          =  0x00000010,
     DHCP_IPV6          =  0x00000020,
     AUTO_IPV6          =  0x00000040,
     LINK_LOCAL_IPV6    =  0x00000080,
 } NET_ADDR_TYPE;

IP Addresses

Description

Defines IP addresses.

• pszInterfaceName - interface name
• type - address type
• pszIPAddrPrefix - IP address

Declarations

 typedef struct _NET_IP_ADDR
 {
     char \*pszInterfaceName;
     NET_ADDR_TYPE type;
     char \*pszIPAddrPrefix;
 } NET_IP_ADDR, \*PNET_IP_ADDR;

nm_set_ipv4_addr_gateway

Description

Set the IPv4 address and (optionally) the default gateway address for the interface.

Declaration

 uint32_t

 nm_set_ipv4_addr_gateway(

     const char \*pszInterfaceName,
     NET_IPV4_ADDR_MODE mode,
     const char \*pszIPv4AddrPrefix,
     const char \*pszIPv4Gateway
 );

Arguments

• pszInterfaceName - interface name
• mode - IP address mode; one of the following values:
  • IPV4_ADDR_MODE_NONE
  • IPV4_ADDR_MODE_STATIC
  • IPV4_ADDR_MODE_DHCP
• pszIPv4AddrPrefix - IPv4 address specified in dot-decimal / prefix notation (for example, 10.10.10.101/23). If the prefix is not specified, then a /32 prefix is assumed.
• pszIPv4Gateway - IPv4 gateway (optional) specified in the dot-decimal format (for example,10.10.20.30).

Returns

• success: 0
• failure: error code

nm_get_ipv4_addr_gateway

Description

Get the IPv4 address and the default gateway address for the interface.

Declaration

uint32_t
 nm_get_ipv4_addr_gateway(
     const char \*pszInterfaceName,
     NET_IPV4_ADDR_MODE \*pMode,
     char \*\*ppszIPv4AddrPrefix,
     char \*\*ppszIPv4Gateway
 );

Arguments

• pszInterfaceName - interface name
• pmode - IP mode; one of the following values:
  • IPV4_ADDR_MODE_NONE
  • IPV4_ADDR_MODE_STATIC
  • IPV4_ADDR_MODE_DHCP
• ppszIPv4AddrPrefix - IPv4 address returned in dot-decimal / prefix notation (for example, 10.10.10.101/23). If the prefix is not specified, then a /32 prefix is assumed.
• ppszIPv4Gateway - IPv4 gateway (optional) returned in the dot-decimal format (for example,10.10.10.250).

Returns

• success: 0
• failure: error code

nm_add_static_ipv6_addr

Description

Add an IPv6 address to the specified interface.

Declaration

uint32_t
 nm_add_static_ipv6_addr(
     const char \*pszInterfaceName,
     const char \*pszIPv6AddrPrefix
 );

Arguments

• pszInterfaceName - interface name
• pszIPv6AddrPrefix - IPv6 address specified in the standard colon-separated IPv6 address format followed by the prefix (for example, 2010:a1:b2::25/64). If the not prefix is specified, then a /128 prefix is assumed.

Returns

• success: 0
• failure: error code

nm_delete_static_ipv6_addr

Description

Delete a static IPv6 address from the interface.

Declaration

uint32_t
 nm_delete_static_ipv6_addr(
     const char \*pszInterfaceName,
     const char \*pszIPv6AddrPrefix
 );

Arguments

• pszInterfaceName - interface name
• pszIPv6AddrPrefix - IPv6 address specified in the standard colon-separated IPv6 address format followed by the prefix (for example, 2010:a1:b2::25/64). If the not prefix is specified, then a /128 prefix is assumed.

Returns

• success: 0
• failure: error code

nm_set_ipv6_addr_mode

Description

Set the mode for the interface.

Declaration

uint32_t
 nm_set_ipv6_addr_mode(
     const char \*pszInterfaceName,
     uint32_t enableDhcp,
     uint32_t enableAutoconf
 );

Arguments

• pszInterfaceName - interface name
• enableDhcp - enable (1) or disable (0) DHCP; enabling configures the interface to acquire a DHCP IPv6 address.
• enableAutoconf - enable (1) or disable (0) autoconf; enabling configures the interface to acquire a stateless autoconfiguration IPv6 address.

Returns

• success: 0
• failure: error code

nm_get_ipv6_addr_mode

Description

Get the mode for the interface.

Declaration

 uint32_t
 nm_get_ipv6_addr_mode(
     const char \*pszInterfaceName,
     uint32_t \*pDhcpEnabled,
     uint32_t \*pAutoconfEnabled
 );

Arguments

• pszInterfaceName - interface name
• pDhcpEnabled - returns whether IPv6 DHCP is enabled (1) or disabled (0).
• pAutoconfEnabled - returns whether IPv6 stateless autoconfiguration is enabled (1) or disabled (0).

Returns

• success: 0
• failure: error code

nm_get_ip_addr

Description

Get the IP address for the interface.

Declaration

uint32_t
 nm_get_ip_addr(
     const char \*pszInterfaceName,
     uint32_t addrTypes,
     size_t \*pCount,
     NET_IP_ADDR \*\*\*pppIpAddrList
 );

Arguments

• pszInterfaceName - interface name
• addrTypes - type of IP address; one of the following values:
  • STATIC_IPV4
  • STATIC_IPV6
  • DHCP_IPV4
  • DHCP_IPV6
  • AUTO_IPV6
  • LINK_LOCAL_IPV6
• pCount - number of IP address structures in the pppIpAddrList array returned by the API call.
• pppIpAddrList - array of NET_IP_ADDR elements that includes the following:
  • pszInterfaceName
  • type
  • pszIPAddrPrefix

Returns

• success: 0
• failure: error code

nm_set_ipv6_gateway

Description

Set the default IPv6 gateway for the interface.

Declaration

 uint32_t
 nm_set_ipv6_gateway(
     const char \*pszInterfaceName,
     const char \*pszIPv6Gateway
 );

Arguments

• pszInterfaceName - interface name
• pszIPv6Gateway - IPv6 gateway specified in the standard colon-separated IPv6 address format (for example, 2010:125::100)

Returns

• success: 0
• failure: error code

nm_get_ipv6_gateway

Description

Get the default IPv6 gateway for the interface.

Declaration

 uint32_t
 nm_get_ipv6_gateway(
     const char \*pszInterfaceName,
     char \*\*ppszIPv6Gateway
 );

Arguments

• pszInterfaceName - interface name
• ppszIPv6Gateway - IPv6 gateway specified in the standard colon-separated IPv6 address format (for example, 2010:125::100)

Returns

• success: 0
• failure: error code

Route Configuration APIs

The Photon OS 2.0 network manager C API enables you to manage static IP routes configuration.

Structure Declarations

Route Scope

Description

Defines the scope of a route. One of the following options.

• GLOBAL_ROUTE - route to a destination one or more hops away
• LINK_ROUTE - route to a destination on the local network
• HOST_ROUTE - route to a destination address on the local host

Declaration

 typedef enum _NET_ROUTE_SCOPE
 {
     GLOBAL_ROUTE = 0,
     LINK_ROUTE,
     HOST_ROUTE,
     NET_ROUTE_SCOPE_MAX
 } NET_ROUTE_SCOPE;

IP Route

Description

Defines an IP route. Includes the following information:

• pszInterfaceName - interface through which the specified destination network can be reached
• pszDestNetwork - destination IP network reached by the specified route
• pszSourceNetwork - source network for the specified route
• pszGateway - IP gateway through which the specified destination network can be reached
• scope - scope of this route entry; one of the following values: GLOBAL_ROUTE, LINK_ROUTE, or HOST_ROUTE as defined above
• metric - metric of this route, an unsigned integer
• table - identifier for the route table to which this route belongs.

Declaration

 typedef struct _NET_IP_ROUTE
 {
     char \*pszInterfaceName;
     char \*pszDestNetwork;
     char \*pszSourceNetwork;
     char \*pszGateway;
     NET_ROUTE_SCOPE scope;
     uint32_t metric;
     uint32_t table;
 } NET_IP_ROUTE, \*PNET_IP_ROUTE;

nm_add_static_ip_route

Description

Add a static IP route.

Declaration

uint32_t
 nm_add_static_ip_route(
     NET_IP_ROUTE \*pRoute
 );

Arguments

• pRoute - static IP route

Returns

• success: 0
• failure: error code

nm_delete_static_ip_route

Description

Delete a static IP route.

Declaration

 uint32_t
 nm_delete_static_ip_route(
     NET_IP_ROUTE \*pRoute
 );

Arguments

• pRoute - static IP route

Returns

• success: 0
• failure: error code

nm_get_static_ip_routes

Description

Get the static IP routes for an interface.

Declaration

 uint32_t
 nm_get_static_ip_routes(
     const char \*pszInterfaceName,
     size_t \*pCount,
     NET_IP_ROUTE \*\*\*pppRouteList
 );

Arguments

• pszInterfaceName - interface name
• pCount - number of NET_IP_ROUTE elements returned in the pppRouteList array by the API call upon success
• pppRouteList - array of static IP routes

Returns

• success: 0
• failure: error code

DNS Configuration APIs

The Photon OS 2.0 network manager C API enables you to manage the DNS and Domains configuration.

Structure Declarations

DNS Mode

Description

DNS mode. Any of the following values:

• DNS_MODE_INVALID - DNS mode is unknown
• STATIC_DNS - DNS servers are statically configured
• DHCP_DNS - DNS servers configuration is acquired from DHCP protocol.

Declaration

 typedef enum _NET_DNS_MODE
 {
     DNS_MODE_INVALID = 0,
     STATIC_DNS,
     DHCP_DNS,
     DNS_MODE_MAX,
 } NET_DNS_MODE;

nm_set_dns_servers

Description

Set the DNS servers list for the interface.

Declaration

uint32_t
 nm_set_dns_servers(
     const char \*pszInterfaceName,
     NET_DNS_MODE mode,
     size_t count,
     const char \*\*ppszDnsServers
 );

Arguments

• pszInterfaceName - interface name (optional, can be NULL)
• mode - DNS mode. One of the following values:
  • DNS_MODE_INVALID = 0
  • DNS_MODE_MA
  • DHCP_DNS
  • STATIC_DNS
• count - number of NUL terminated DNS server entries passed in the ppszDnsServers array to the API call (for example, 10.10.10.200 or 2020::40)
• ppszDnsServers - array of DNS servers

Returns

• success: 0
• failure: error code

nm_add_dns_server

Description

Add a server to the DNS servers list associated with an interface.

Declaration

uint32_t
 nm_add_dns_server(
     const char \*pszInterfaceName,
     const char \*pszDnsServer
 );

Arguments

• pszInterfaceName - interface name (optional, can be NULL)
• ppszDnsServer - server to add to the DNS server list

Returns

• success: 0
• failure: error code

nm_delete_dns_server

Description

Delete a server from the DNS servers list associated with an interface.

Declaration

 uint32_t
 nm_delete_dns_server(
     const char \*pszInterfaceName,
     const char \*pszDnsServer
 );

Arguments

• pszInterfaceName - interface name (optional, can be NULL)
• ppszDnsServer - server to remove from the DNS server list

Returns

• success: 0
• failure: error code

nm_get_dns_servers

Description

Get the the DNS servers list for the interface.

Declaration

uint32_t
 nm_get_dns_servers(
     const char \*pszInterfaceName,
     NET_DNS_MODE \*pMode,
     size_t \*pCount,
     char \*\*\*pppszDnsServers
 );

Arguments

• pszInterfaceName - interface name (optional, can be NULL)
• pMode - DNS mode. One of the following values:
  • DNS_MODE_INVALID
  • DHCP_DNS
  • STATIC_DNS
• pCount - number of NUL terminated DNS server entries in the pppszDnsServers array returned by the API call (for example, 10.10.10.200 or 2020::40)
• pppszDnsServers - array of DNS servers

Returns

• success: 0
• failure: error code

nm_set_dns_domains

Description

Set the DNS domain list.

Declaration

uint32_t
 nm_set_dns_domains(
     const char \*pszInterfaceName,
     size_t count,
     const char \*\*ppszDnsDomains
 );

Arguments

• pszInterfaceName - interface name (optional, can be NULL)
• count - number of DNS domains specified in the ppszDnsDomains array to the API call (for example, if count = 2, then there are two elements: ppszDnsDomains[0] and ppszDnsDomains[1])
• ppszDnsDomains - array of DNS domains

Returns

• success: 0
• failure: error code

nm_add_dns_domain

Description

Add a DNS domain to the DNS domain list.

Declaration

uint32_t
 nm_add_dns_domain(
     const char \*pszInterfaceName,
     const char \*pszDnsDomain
 );

Arguments

• pszInterfaceName - interface name (optional, can be NULL)
• pszDnsDomain - DNS domain to add to the list

Returns

• success: 0
• failure: error code

nm_delete_dns_domain

Description

Delete a DNS domain from the DNS domain list.

Declaration

uint32_t
 nm_delete_dns_domain(
     const char \*pszInterfaceName,
     const char \*pszDnsDomain
 );

Arguments

• pszInterfaceName - interface name (optional, can be NULL)
• pszDnsDomain - DNS domain to remove from the list

Returns

• success: 0
• failure: error code

nm_get_dns_domains

Description

Get the list of DNS domains.

Declaration

uint32_t
 nm_get_dns_domains(
     const char \*pszInterfaceName,
     size_t \*pCount,
     char \*\*\*pppszDnsDomains
 );

Arguments

• pszInterfaceName - interface name (optional, can be NULL)
• pCount - number of DNS domains returned in the pppszDnsDomains from the API call (for example, if count = 2, then there are two elements: ppszDnsDomains[0] and ppszDnsDomains[1])
• pppszDnsDomains - array of DNS domains

Returns

• success: 0
• failure: error code

DHCP Options DUID and IAID Configuration APIs

The Photon OS 2.0 network manager C API enables you to manage DHCP DUID and Interface IAID.

nm_set_iaid

Description

Set the IAID for the interface.

Declaration

uint32_t
 nm_set_iaid(
     const char \*pszInterfaceName,
     uint32_t iaid
 );

Arguments

• pszInterfaceName - interface name
• iaid - interface association identifier (IAID)

Returns

• success: 0
• failure: error code

nm_get_iaid

Description

Get the IAID for the interface.

Declaration

uint32_t
 nm_get_iaid(
     const char \*pszInterfaceName,
     uint32_t \*pIaid
 );

Arguments

• pszInterfaceName - interface name
• pIaid - interface association identifier (IAID)

Returns

• success: 0
• failure: error code

nm_set_duid

Description

Set the DUID for the interface.

Declaration

uint32_t
 nm_set_duid(
     const char \*pszInterfaceName,
     const char \*pszDuid
 );

Arguments

• pszInterfaceName - interface name (optional, specify NULL to set system global DUID configuration)
• pszDuid - DHCP unique identifier (DUID)

Returns

• success: 0
• failure: error code

nm_get_duid

Description

Get the DUID for the interface.

Declaration

uint32_t
 nm_get_duid(
     const char \*pszInterfaceName,
     char \*\*ppszDuid
 );

Arguments

• pszInterfaceName - interface name (optional, specify NULL to query system global DUID configuration)
• ppszDuid - DHCP unique identifier (DUID)

Returns

• success: 0
• failure: error code

NTP Configuration APIs

The Photon OS 2.0 network manager C API enables you to manage NTP servers configured for the system.

nm_set_ntp_servers

Description

Set the list of NTP servers.

Declaration

 uint32_t
 nm_set_ntp_servers(
     size_t count,
     const char \*\*ppszNtpServers
 );

Arguments

• count - number of NTP servers in the ppszNtpServers array passed to the API call.
• ppszNtpServers - array of NTP servers

Returns

• success: 0
• failure: error code

nm_add_ntp_servers

Description

Add a server to the NTP servers list.

Declaration

 uint32_t
 nm_add_ntp_servers(
     size_t count,
     const char \*\*ppszNtpServers
 );

Arguments

• count - number of NTP servers to add (specified in the ppszNtpServers array) passed to the API call.
• ppszNtpServers - array of NTP servers to add

Returns

• success: 0
• failure: error code

nm_delete_ntp_servers

Description

Delete a server from the NTP servers list.

Declaration

 uint32_t
 nm_delete_ntp_servers(
     size_t count,
     const char \*\*ppszNtpServers
 );

Arguments

• count - number of NTP servers to delete (specified in the ppszNtpServers array) passed to the API call
• ppszNtpServers - array of NTP servers to delete

Returns

• success: 0
• failure: error code

nm_get_ntp_servers

Description

Get the NTP servers list.

Declaration

 uint32_t
 nm_get_ntp_servers(
     size_t \*pCount,
     char \*\*\*pppszNtpServers
 );

Arguments

• pCount - number of NTP servers in the pppszNtpServers array returned from the API call
• pppszNtpServers - array of NTP servers

Returns

• success: 0
• failure: error code

Other APIs

nm_set_hostname

Description

Set the host name for the system.

Declaration

 uint32_t
 nm_set_hostname(
     const char \*pszHostname
 );

Arguments

• pszHostname - host name

Returns

• success: 0
• failure: error code

nm_get_hostname

Description

Get the host name for the system.

Declaration

 uint32_t
 nm_get_hostname(
     char \*\*ppszHostname
 );

Arguments

• ppszHostname - host name

Returns

• success: 0
• failure: error code

nm_wait_for_link_up

Description

Wait for the specified interface to come up.

Declaration

 uint32_t
 nm_wait_for_link_up(
     const char \*pszInterfaceName,
     uint32_t timeout
 );

Arguments

• pszInterfaceName - interface name
• timeout - maximum time (in seconds) to wait (until the link is up) before timing out of the request; specify 0 for no timeout (wait indefinitely)

Returns

• success: 0
• failure: error code

nm_wait_for_ip

Description

Wait for the interface to acquire an IP address of the specified IP address type.

Declaration

 uint32_t
 nm_wait_for_ip(
     const char \*pszInterfaceName,
     uint32_t timeout,
     NET_ADDR_TYPE addrTypes
 );

Arguments

• pszInterfaceName - interface name
• timeout - maximum time (in seconds) to wait (until the link has an IP address of the specified address type) before timing out of the request; specify 0 for no timeout (wait indefinitely)
• addrTypes - type of IP address; one of the following values:
  • STATIC_IPV4
  • STATIC_IPV6
  • DHCP_IPV4
  • DHCP_IPV6
  • AUTO_IPV6
  • LINK_LOCAL_IPV6

Returns

• success: 0
• failure: error code

nm_set_network_param

Description

Set the value of a network parameter for an object.

Declaration

uint32_t
 nm_set_network_param(
     const char \*pszObjectName,
     const char \*pszParamName,
     const char \*pszParamValue
 );

Arguments

• pszObjectName - an interface name (for example, "eth0") or a file name (for example, /etc/systemd/resolved.conf)
• pszParamName - name of a parameter associated with the object; specified in the format SectionName_KeyName (for example, Link_MTUBytes represents the MtuBytes key in [Link] section in https://www.freedesktop.org/software/systemd/man/systemd.network.html)
• pszParamValue - points to the parameter value to set; you can add (+) or remove (-) a parameter by prepending the parameter name with + or -. For example:

netmgr net_info --set --object eth1 --paramname +Network_Address --paramvalue "10.10.10.1/24"

Returns

• success: 0
• failure: error code

nm_get_network_param

Description

Get the value of a network parameter associated with an object.

Declaration

 uint32_t
 nm_get_network_param(
     const char \*pszObjectName,
     const char \*pszParamName,
     char \*\*ppszParamValue
 );

Arguments

• pszObjectName - an interface name (for example, "eth0") or a file name (for example, /etc/systemd/resolved.conf)
• pszParamName - name of a parameter associated with the object; returned in the format SectionName_KeyName (for example, Link_MTUBytes represents the MtuBytes key in [Link] section in https://www.freedesktop.org/software/systemd/man/systemd.network.html)
• ppszParamValue - parameter value

Returns

• success: 0
• failure: error code

Service Management APIs

nm_stop_network_service

Description

Stop the network service.

Declaration

 uint32_t
 nm_stop_network_service();

Returns

• success: 0
• failure: error code

nm_restart_network_service

Description

Restart the network service.

Declaration

 uint32_t
 nm_restart_network_service();

Returns

• success: 0
• failure: error code

nm_stop_dns_service

Description

Stop the DNS service.

Declaration

uint32_t
 nm_stop_dns_service();

Returns

• success: 0
• failure: error code

nm_restart_dns_service

Description

Restart the DNS service.

Declaration

 uint32_t
 nm_restart_dns_service();

Returns

• success: 0
• failure: error code

nm_stop_ntp_service

Description

Stop the NTP service.

Declaration

 uint32_t
 nm_stop_ntp_service();

Returns

• success: 0
• failure: error code

nm_restart_ntp_service

Description

Restart the NTP service.

Declaration

 uint32_t
 nm_restart_ntp_service();

Returns

• success: 0
• failure: error code