diff options
Diffstat (limited to 'networking/udhcp/dhcpc.c')
| -rw-r--r-- | networking/udhcp/dhcpc.c | 53 |
1 files changed, 41 insertions, 12 deletions
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c index 7587509..4565d7f 100644 --- a/networking/udhcp/dhcpc.c +++ b/networking/udhcp/dhcpc.c @@ -331,11 +331,11 @@ static void init_packet(struct dhcp_packet *packet, char type) } } -/* Add a parameter request list for stubborn DHCP servers. Pull the data - * from the struct in options.c. Don't do bounds checking here because it - * goes towards the head of the packet. */ -static void add_param_req_option(struct dhcp_packet *packet) +static void add_client_options(struct dhcp_packet *packet) { + /* Add am "param req" option with the list of options we'd like to have + * from stubborn DHCP servers. Pull the data from the struct in options.c. + * No bounds checking because it goes towards the head of the packet. */ uint8_t c; int end = udhcp_end_option(packet->options); int i, len = 0; @@ -355,6 +355,19 @@ static void add_param_req_option(struct dhcp_packet *packet) packet->options[end + OPT_LEN] = len; packet->options[end + OPT_DATA + len] = DHCP_END; } + + /* Add -x options if any */ + { + struct option_set *curr = client_config.options; + while (curr) { + udhcp_add_option_string(packet->options, curr->data); + curr = curr->next; + } +// if (client_config.sname) +// strncpy((char*)packet->sname, client_config.sname, sizeof(packet->sname) - 1); +// if (client_config.boot_file) +// strncpy((char*)packet->file, client_config.boot_file, sizeof(packet->file) - 1); + } } /* RFC 2131 @@ -395,7 +408,7 @@ static int send_discover(uint32_t xid, uint32_t requested) /* Explicitly saying that we want RFC-compliant packets helps * some buggy DHCP servers to NOT send bigger packets */ udhcp_add_simple_option(packet.options, DHCP_MAX_SIZE, htons(576)); - add_param_req_option(&packet); + add_client_options(&packet); bb_info_msg("Sending discover..."); return raw_bcast_from_client_config_ifindex(&packet); @@ -414,7 +427,7 @@ static int send_select(uint32_t xid, uint32_t server, uint32_t requested) packet.xid = xid; udhcp_add_simple_option(packet.options, DHCP_REQUESTED_IP, requested); udhcp_add_simple_option(packet.options, DHCP_SERVER_ID, server); - add_param_req_option(&packet); + add_client_options(&packet); addr.s_addr = requested; bb_info_msg("Sending select for %s...", inet_ntoa(addr)); @@ -429,7 +442,7 @@ static int send_renew(uint32_t xid, uint32_t server, uint32_t ciaddr) init_packet(&packet, DHCPREQUEST); packet.xid = xid; packet.ciaddr = ciaddr; - add_param_req_option(&packet); + add_client_options(&packet); bb_info_msg("Sending renew..."); if (server) @@ -728,6 +741,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) const char *str_c, *str_V, *str_h, *str_F, *str_r; IF_FEATURE_UDHCP_PORT(char *str_P;) llist_t *list_O = NULL; + llist_t *list_x = NULL; int tryagain_timeout = 20; int discover_timeout = 3; int discover_retries = 3; @@ -792,9 +806,10 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) OPT_A = 1 << 16, OPT_O = 1 << 17, OPT_o = 1 << 18, - OPT_f = 1 << 19, + OPT_x = 1 << 19, + OPT_f = 1 << 20, /* The rest has variable bit positions, need to be clever */ - OPTBIT_f = 19, + OPTBIT_f = 20, USE_FOR_MMU( OPTBIT_b,) IF_FEATURE_UDHCPC_ARPING(OPTBIT_a,) IF_FEATURE_UDHCP_PORT( OPTBIT_P,) @@ -811,14 +826,14 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) str_V = "udhcp "BB_VER; /* Parse command line */ - /* Cc: mutually exclusive; O: list; -T,-t,-A take numeric param */ - opt_complementary = "c--C:C--c:O::T+:t+:A+" + /* Cc: mutually exclusive; O,x: list; -T,-t,-A take numeric param */ + opt_complementary = "c--C:C--c:O::x::T+:t+:A+" #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1 ":vv" #endif ; IF_LONG_OPTS(applet_long_options = udhcpc_longopts;) - opt = getopt32(argv, "c:CV:H:h:F:i:np:qRr:s:T:t:SA:O:of" + opt = getopt32(argv, "c:CV:H:h:F:i:np:qRr:s:T:t:SA:O:ox:f" USE_FOR_MMU("b") IF_FEATURE_UDHCPC_ARPING("a") IF_FEATURE_UDHCP_PORT("P:") @@ -828,6 +843,7 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) , &client_config.script /* s */ , &discover_timeout, &discover_retries, &tryagain_timeout /* T,t,A */ , &list_O + , &list_x IF_FEATURE_UDHCP_PORT(, &str_P) #if defined CONFIG_UDHCP_DEBUG && CONFIG_UDHCP_DEBUG >= 1 , &dhcp_verbose @@ -868,6 +884,19 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) n = dhcp_options[n].code; client_config.opt_mask[n >> 3] |= 1 << (n & 7); } + while (list_x) { + int n; + char *optstr = llist_pop(&list_x); + char *colon = strchr(optstr, ':'); + if (colon) + *colon = '\0'; + n = index_in_strings(dhcp_option_strings, optstr); + if (n < 0) + bb_error_msg_and_die("unknown option '%s'", optstr); + if (colon) + *colon = ' '; + udhcp_str2optset(optstr, &client_config.options); + } if (udhcp_read_interface(client_config.interface, &client_config.ifindex, |