X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Flibsystemd-network%2Fsd-dhcp6-client.c;h=fa4f9b5dc2c79572cd094d076dcdf1970c08a672;hb=5e78424f4a27c07be50e246308035c877f204038;hp=ad6c5eb4d86fd0b76c29271e8ec7958d5a79839e;hpb=9547267dc56d5bf84b8119dfcb8e101202fac7d3;p=elogind.git diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c index ad6c5eb4d..fa4f9b5dc 100644 --- a/src/libsystemd-network/sd-dhcp6-client.c +++ b/src/libsystemd-network/sd-dhcp6-client.c @@ -22,6 +22,7 @@ #include #include #include +#include #include "udev.h" #include "udev-util.h" @@ -44,6 +45,8 @@ */ #define MAX_DUID_LEN 128 +#define MAX_MAC_ADDR_LEN INFINIBAND_ALEN + struct sd_dhcp6_client { RefCount n_ref; @@ -51,7 +54,9 @@ struct sd_dhcp6_client { sd_event *event; int event_priority; int index; - struct ether_addr mac_addr; + uint8_t mac_addr[MAX_MAC_ADDR_LEN]; + size_t mac_addr_len; + uint16_t arp_type; DHCP6IA ia_na; be32_t transaction_id; usec_t transaction_start; @@ -67,7 +72,32 @@ struct sd_dhcp6_client { sd_event_source *timeout_resend_expire; sd_dhcp6_client_cb_t cb; void *userdata; - uint8_t duid[MAX_DUID_LEN]; + union { + struct { + uint16_t type; /* DHCP6_DUID_LLT */ + uint16_t htype; + uint32_t time; + uint8_t haddr[0]; + } _packed_ llt; + struct { + uint16_t type; /* DHCP6_DUID_EN */ + uint32_t pen; + uint8_t id[8]; + } _packed_ en; + struct { + uint16_t type; /* DHCP6_DUID_LL */ + uint16_t htype; + uint8_t haddr[0]; + } _packed_ ll; + struct { + uint16_t type; /* DHCP6_DUID_UUID */ + sd_id128_t uuid; + } _packed_ uuid; + struct { + uint16_t type; + uint8_t data[MAX_DUID_LEN]; + } _packed_ raw; + } duid; size_t duid_len; }; @@ -135,27 +165,63 @@ int sd_dhcp6_client_set_index(sd_dhcp6_client *client, int interface_index) return 0; } -int sd_dhcp6_client_set_mac(sd_dhcp6_client *client, - const struct ether_addr *mac_addr) +int sd_dhcp6_client_set_mac(sd_dhcp6_client *client, const uint8_t *addr, + size_t addr_len, uint16_t arp_type) { assert_return(client, -EINVAL); - - if (mac_addr) - memcpy(&client->mac_addr, mac_addr, sizeof(client->mac_addr)); + assert_return(addr, -EINVAL); + assert_return(addr_len > 0 && addr_len <= MAX_MAC_ADDR_LEN, -EINVAL); + assert_return(arp_type > 0, -EINVAL); + + if (arp_type == ARPHRD_ETHER) + assert_return(addr_len == ETH_ALEN, -EINVAL); + else if (arp_type == ARPHRD_INFINIBAND) + assert_return(addr_len == INFINIBAND_ALEN, -EINVAL); else - memset(&client->mac_addr, 0x00, sizeof(client->mac_addr)); + return -EINVAL; + + if (client->mac_addr_len == addr_len && + memcmp(&client->mac_addr, addr, addr_len) == 0) + return 0; + + memcpy(&client->mac_addr, addr, addr_len); + client->mac_addr_len = addr_len; + client->arp_type = arp_type; return 0; } -int sd_dhcp6_client_set_duid(sd_dhcp6_client *client, uint8_t *duid, +int sd_dhcp6_client_set_duid(sd_dhcp6_client *client, uint16_t type, uint8_t *duid, size_t duid_len) { assert_return(client, -EINVAL); assert_return(duid, -EINVAL); assert_return(duid_len > 0 && duid_len <= MAX_DUID_LEN, -EINVAL); - memcpy(&client->duid, duid, duid_len); + switch (type) { + case DHCP6_DUID_LLT: + if (duid_len <= sizeof(client->duid.llt)) + return -EINVAL; + break; + case DHCP6_DUID_EN: + if (duid_len != sizeof(client->duid.en)) + return -EINVAL; + break; + case DHCP6_DUID_LL: + if (duid_len <= sizeof(client->duid.ll)) + return -EINVAL; + break; + case DHCP6_DUID_UUID: + if (duid_len != sizeof(client->duid.uuid)) + return -EINVAL; + break; + default: + /* accept unknown type in order to be forward compatible */ + break; + } + + client->duid.raw.type = htobe16(type); + memcpy(&client->duid.raw.data, duid, duid_len); client->duid_len = duid_len; return 0; @@ -598,8 +664,8 @@ static int client_ensure_iaid(sd_dhcp6_client *client) { siphash24((uint8_t*)&id, name, strlen(name), HASH_KEY.bytes); else /* fall back to mac address if no predictable name available */ - siphash24((uint8_t*)&id, &client->mac_addr, ETH_ALEN, - HASH_KEY.bytes); + siphash24((uint8_t*)&id, &client->mac_addr, + client->mac_addr_len, HASH_KEY.bytes); /* fold into 32 bits */ client->ia_na.id = (id & 0xffffffff) ^ (id >> 32); @@ -1130,16 +1196,9 @@ sd_dhcp6_client *sd_dhcp6_client_unref(sd_dhcp6_client *client) { return client; } -struct duid_en { - uint16_t type; /* DHCP6_DUID_EN */ - uint32_t pen; - uint8_t id[8]; -} _packed_; - int sd_dhcp6_client_new(sd_dhcp6_client **ret) { _cleanup_dhcp6_client_unref_ sd_dhcp6_client *client = NULL; - struct duid_en *duid; sd_id128_t machine_id; int r; size_t t; @@ -1159,9 +1218,9 @@ int sd_dhcp6_client_new(sd_dhcp6_client **ret) client->fd = -1; /* initialize DUID */ - duid = (struct duid_en *) &client->duid; - duid->type = htobe16(DHCP6_DUID_EN); - duid->pen = htobe32(SYSTEMD_PEN); + client->duid.en.type = htobe16(DHCP6_DUID_EN); + client->duid.en.pen = htobe32(SYSTEMD_PEN); + client->duid_len = sizeof(client->duid.en); r = sd_id128_get_machine(&machine_id); if (r < 0) @@ -1169,8 +1228,7 @@ int sd_dhcp6_client_new(sd_dhcp6_client **ret) /* a bit of snake-oil perhaps, but no need to expose the machine-id directly */ - siphash24(duid->id, &machine_id, sizeof(machine_id), HASH_KEY.bytes); - client->duid_len = sizeof (struct duid_en); + siphash24(client->duid.en.id, &machine_id, sizeof(machine_id), HASH_KEY.bytes); client->req_opts_len = ELEMENTSOF(default_req_opts);