ggsn: Move PCO handling code into its own file
This way ggsn.c is shrinked in size and get rid of a lot of code there,
which is of no interest unless the reader is interested in that really
specific part.
Change-Id: Ieaa7e71f17c7fd9377c76ef53362eab596d669a6
diff --git a/ggsn/pco.h b/ggsn/pco.h
new file mode 100644
index 0000000..7ebe05a
--- /dev/null
+++ b/ggsn/pco.h
@@ -0,0 +1,81 @@
+#pragma once
+
+#include <stdint.h>
+
+#include "../gtp/pdp.h"
+
+/* 3GPP TS 24.008 10.6.5.3 */
+enum pco_protocols {
+ PCO_P_LCP = 0xC021,
+ PCO_P_PAP = 0xC023,
+ PCO_P_CHAP = 0xC223,
+ PCO_P_IPCP = 0x8021,
+ PCO_P_PCSCF_ADDR = 0x0001,
+ PCO_P_IM_CN_SS_F = 0x0002,
+ PCO_P_DNS_IPv6_ADDR = 0x0003,
+ PCO_P_POLICY_CTRL_REJ = 0x0004, /* only in Network->MS */
+ PCO_P_MS_SUP_NETREQ_BCI = 0x0005,
+ /* reserved */
+ PCO_P_DSMIPv6_HA_ADDR = 0x0007,
+ PCO_P_DSMIPv6_HN_PREF = 0x0008,
+ PCO_P_DSMIPv6_v4_HA_ADDR= 0x0009,
+ PCO_P_IP_ADDR_VIA_NAS = 0x000a, /* only MS->Network */
+ PCO_P_IPv4_ADDR_VIA_DHCP= 0x000b, /* only MS->Netowrk */
+ PCO_P_PCSCF_IPv4_ADDR = 0x000c,
+ PCO_P_DNS_IPv4_ADDR = 0x000d,
+ PCO_P_MSISDN = 0x000e,
+ PCO_P_IFOM_SUPPORT = 0x000f,
+ PCO_P_IPv4_LINK_MTU = 0x0010,
+ PCO_P_MS_SUPP_LOC_A_TFT = 0x0011,
+ PCO_P_PCSCF_RESEL_SUP = 0x0012, /* only MS->Network */
+ PCO_P_NBIFOM_REQ = 0x0013,
+ PCO_P_NBIFOM_MODE = 0x0014,
+ PCO_P_NONIP_LINK_MTU = 0x0015,
+ PCO_P_APN_RATE_CTRL_SUP = 0x0016,
+ PCO_P_PS_DATA_OFF_UE = 0x0017,
+ PCO_P_REL_DATA_SVC = 0x0018,
+};
+
+struct pco_element {
+ uint16_t protocol_id; /* network byte order */
+ uint8_t length; /* length of data below */
+ uint8_t data[0];
+} __attribute__((packed));
+
+
+/* RFC 1332 */
+enum ipcp_options {
+ IPCP_OPT_IPADDR = 3,
+ IPCP_OPT_PRIMARY_DNS = 129,
+ IPCP_OPT_SECONDARY_DNS = 131,
+};
+
+struct ipcp_option_hdr {
+ uint8_t type;
+ uint8_t len;
+ uint8_t data[0];
+} __attribute__ ((packed));
+
+struct ipcp_hdr {
+ uint8_t code;
+ uint8_t id;
+ uint16_t len;
+ uint8_t options[0];
+} __attribute__ ((packed));
+
+/* RFC 1334, section 3.2. Packet Format */
+struct pap_element {
+ uint8_t code;
+ uint8_t id;
+ uint16_t len; /* length including header */
+ uint8_t data[0];
+} __attribute__((packed));
+
+enum pap_code {
+ PAP_CODE_AUTH_REQ = 1,
+ PAP_CODE_AUTH_ACK = 2,
+ PAP_CODE_AUTH_NAK = 3,
+};
+
+struct apn_ctx;
+void process_pco(const struct apn_ctx *apn, struct pdp_t *pdp);