diff options
Diffstat (limited to 'networking/udhcp/dhcpc.c')
| -rw-r--r-- | networking/udhcp/dhcpc.c | 71 |
1 files changed, 32 insertions, 39 deletions
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c index 16228f0..ab669d2 100644 --- a/networking/udhcp/dhcpc.c +++ b/networking/udhcp/dhcpc.c @@ -609,7 +609,7 @@ static void init_packet(struct dhcp_packet *packet, char type) secs = client_data.last_secs - client_data.first_secs; packet->secs = (secs < 0xffff) ? htons(secs) : 0xffff; - memcpy(packet->chaddr, client_data_client_mac, 6); + memcpy(packet->chaddr, client_data.client_mac, 6); } static void add_client_options(struct dhcp_packet *packet) @@ -635,9 +635,6 @@ static void add_client_options(struct dhcp_packet *packet) packet->options[end + OPT_DATA + len] = DHCP_END; } - if (client_data.fqdn) - udhcp_add_binary_option(packet, client_data.fqdn); - /* Request broadcast replies if we have no IP addr */ if ((option_mask32 & OPT_B) && packet->ciaddr == 0) packet->flags |= htons(BROADCAST_FLAG); @@ -715,7 +712,6 @@ static NOINLINE int send_discover(uint32_t xid, uint32_t requested) udhcp_add_simple_option(&packet, DHCP_REQUESTED_IP, requested); /* Add options: maxsize, - * optionally: fqdn, client-id, * "param req" option according to -O, options specified with -x */ add_client_options(&packet); @@ -759,7 +755,6 @@ static NOINLINE int send_select(uint32_t xid, uint32_t server, uint32_t requeste udhcp_add_simple_option(&packet, DHCP_SERVER_ID, server); /* Add options: maxsize, - * optionally: fqdn, client-id, * "param req" option according to -O, and options specified with -x */ add_client_options(&packet); @@ -804,7 +799,6 @@ static NOINLINE int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr) packet.ciaddr = ciaddr; /* Add options: maxsize, - * optionally: fqdn, client-id, * "param req" option according to -O, and options specified with -x */ add_client_options(&packet); @@ -1154,17 +1148,6 @@ static void perform_release(uint32_t server_addr, uint32_t requested_ip) client_data.state = RELEASED; } -static uint8_t* alloc_dhcp_option(int code, const char *str, int extra) -{ - uint8_t *storage; - int len = strnlen(str, 255); - storage = xzalloc(len + extra + OPT_DATA); - storage[OPT_CODE] = code; - storage[OPT_LEN] = len + extra; - memcpy(storage + extra + OPT_DATA, str, len); - return storage; -} - #if BB_MMU static void client_background(void) { @@ -1284,8 +1267,13 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) IF_UDHCP_VERBOSE(, &dhcp_verbose) ); if (opt & OPT_F) { + char *p; + unsigned len; /* FQDN option format: [0x51][len][flags][0][0]<fqdn> */ - client_data.fqdn = alloc_dhcp_option(DHCP_FQDN, str_F, 3); + len = strlen(str_F); + p = udhcp_insert_new_option( + &client_data.options, DHCP_FQDN, + len + 3, /*dhcp6:*/ 0); /* Flag bits: 0000NEOS * S: 1 = Client requests server to update A RR in DNS as well as PTR * O: 1 = Server indicates to client that DNS has been updated regardless @@ -1294,9 +1282,10 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) * N: 1 = Client requests server to not update DNS (S must be 0 then) * Two [0] bytes which follow are deprecated and must be 0. */ - client_data.fqdn[OPT_DATA + 0] = 0x1; - /*client_data.fqdn[OPT_DATA + 1] = 0; - xzalloc did it */ - /*client_data.fqdn[OPT_DATA + 2] = 0; */ + p[OPT_DATA + 0] = 0x1; + /*p[OPT_DATA + 1] = 0; - xzalloc did it */ + /*p[OPT_DATA + 2] = 0; */ + memcpy(p + OPT_DATA + 3, str_F, len); /* do not store NUL byte */ } if (opt & OPT_r) requested_ip = inet_addr(str_r); @@ -1333,31 +1322,35 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) free(optstr); } if (str_V[0] != '\0') { + char *p; + unsigned len; //msg added 2021-06 bb_error_msg("option -V VENDOR is deprecated, use -x vendor:VENDOR"); - udhcp_insert_new_option( + len = strlen(str_V); + p = udhcp_insert_new_option( &client_data.options, DHCP_VENDOR, - str_V, strlen(str_V), /*dhcp6:*/ 0); + len, /*dhcp6:*/ 0); + memcpy(p + OPT_DATA, str_V, len); /* do not store NUL byte */ + } + + clientid_mac_ptr = NULL; + if (!(opt & OPT_C) && !udhcp_find_option(client_data.options, DHCP_CLIENT_ID)) { + /* not suppressed and not set, create default client ID */ + clientid_mac_ptr = udhcp_insert_new_option( + &client_data.options, DHCP_CLIENT_ID, + 1 + 6, /*dhcp6:*/ 0); + clientid_mac_ptr[OPT_DATA] = 1; /* type: ethernet */ + clientid_mac_ptr += OPT_DATA + 1; /* skip option code, len, ethernet */ } if (udhcp_read_interface(client_data.interface, &client_data.ifindex, NULL, - client_data_client_mac) + client_data.client_mac) ) { return 1; } - clientid_mac_ptr = NULL; - if (!(opt & OPT_C) && !udhcp_find_option(client_data.options, DHCP_CLIENT_ID)) { - /* not suppressed and not set, set the default client ID */ - client_data_client_mac[-1] = 1; /* type: ethernet */ - clientid_mac_ptr = udhcp_insert_new_option( - &client_data.options, DHCP_CLIENT_ID, - client_data_client_mac - 1, 1 + 6, /*dhcp6:*/ 0); - clientid_mac_ptr += 3; /* skip option code, len, ethernet */ - } - #if !BB_MMU /* on NOMMU reexec (i.e., background) early */ if (!(opt & OPT_f)) { @@ -1443,12 +1436,12 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) if (udhcp_read_interface(client_data.interface, &client_data.ifindex, NULL, - client_data_client_mac) + client_data.client_mac) ) { goto ret0; /* iface is gone? */ } if (clientid_mac_ptr) - memcpy(clientid_mac_ptr, client_data_client_mac, 6); + memcpy(clientid_mac_ptr, client_data.client_mac, 6); switch (client_data.state) { case INIT_SELECTING: @@ -1643,7 +1636,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) /* Ignore packets that aren't for us */ if (packet.hlen != 6 - || memcmp(packet.chaddr, client_data_client_mac, 6) != 0 + || memcmp(packet.chaddr, client_data.client_mac, 6) != 0 ) { //FIXME: need to also check that last 10 bytes are zero log1("chaddr does not match%s", ", ignoring packet"); // log2? @@ -1755,7 +1748,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) if (!arpping(requested_ip, NULL, (uint32_t) 0, - client_data_client_mac, + client_data.client_mac, client_data.interface, arpping_ms) ) { |