343 lines
9.7 KiB
C
343 lines
9.7 KiB
C
//https://source.codeaurora.org/quic/la/platform/vendor/qcom-opensource/dataservices/tree/rmnetctl
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#include <sys/socket.h>
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#include <stdint.h>
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#include <linux/netlink.h>
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#include <string.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <linux/rtnetlink.h>
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#include <linux/gen_stats.h>
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#include <net/if.h>
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#include <asm/types.h>
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#include <linux/rmnet_data.h>
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#define RMNETCTL_SUCCESS 0
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#define RMNETCTL_LIB_ERR 1
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#define RMNETCTL_KERNEL_ERR 2
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#define RMNETCTL_INVALID_ARG 3
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enum rmnetctl_error_codes_e {
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RMNETCTL_API_SUCCESS = 0,
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RMNETCTL_API_FIRST_ERR = 1,
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RMNETCTL_API_ERR_MESSAGE_SEND = 3,
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RMNETCTL_API_ERR_MESSAGE_RECEIVE = 4,
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RMNETCTL_INIT_FIRST_ERR = 5,
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RMNETCTL_INIT_ERR_PROCESS_ID = RMNETCTL_INIT_FIRST_ERR,
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RMNETCTL_INIT_ERR_NETLINK_FD = 6,
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RMNETCTL_INIT_ERR_BIND = 7,
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RMNETCTL_API_SECOND_ERR = 9,
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RMNETCTL_API_ERR_HNDL_INVALID = RMNETCTL_API_SECOND_ERR,
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RMNETCTL_API_ERR_RETURN_TYPE = 13,
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};
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struct rmnetctl_hndl_s {
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uint32_t pid;
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uint32_t transaction_id;
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int netlink_fd;
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struct sockaddr_nl src_addr, dest_addr;
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};
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typedef struct rmnetctl_hndl_s rmnetctl_hndl_t;
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#define NLMSG_TAIL(nmsg) \
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((struct rtattr *) (((char *)(nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
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struct nlmsg {
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struct nlmsghdr nl_addr;
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struct ifinfomsg ifmsg;
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char data[500];
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};
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#define MIN_VALID_PROCESS_ID 0
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#define MIN_VALID_SOCKET_FD 0
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#define KERNEL_PROCESS_ID 0
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#define UNICAST 0
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enum {
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IFLA_RMNET_UL_AGG_PARAMS = __IFLA_RMNET_MAX,
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__IFLA_RMNET_EXT_MAX,
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};
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struct rmnet_egress_agg_params {
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uint16_t agg_size;
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uint16_t agg_count;
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uint32_t agg_time;
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};
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static int rmnet_get_ack(rmnetctl_hndl_t *hndl, uint16_t *error_code)
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{
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struct nlack {
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struct nlmsghdr ackheader;
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struct nlmsgerr ackdata;
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char data[256];
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} ack;
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int i;
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if (!hndl || !error_code)
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return RMNETCTL_INVALID_ARG;
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if ((i = recv(hndl->netlink_fd, &ack, sizeof(ack), 0)) < 0) {
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*error_code = errno;
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return RMNETCTL_API_ERR_MESSAGE_RECEIVE;
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}
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/*Ack should always be NLMSG_ERROR type*/
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if (ack.ackheader.nlmsg_type == NLMSG_ERROR) {
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if (ack.ackdata.error == 0) {
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*error_code = RMNETCTL_API_SUCCESS;
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return RMNETCTL_SUCCESS;
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} else {
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*error_code = -ack.ackdata.error;
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return RMNETCTL_KERNEL_ERR;
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}
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}
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*error_code = RMNETCTL_API_ERR_RETURN_TYPE;
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return RMNETCTL_API_FIRST_ERR;
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}
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static int rtrmnet_ctl_init(rmnetctl_hndl_t **hndl, uint16_t *error_code)
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{
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struct sockaddr_nl __attribute__((__may_alias__)) *saddr_ptr;
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int netlink_fd = -1;
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pid_t pid = 0;
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if (!hndl || !error_code)
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return RMNETCTL_INVALID_ARG;
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*hndl = (rmnetctl_hndl_t *)malloc(sizeof(rmnetctl_hndl_t));
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if (!*hndl) {
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*error_code = RMNETCTL_API_ERR_HNDL_INVALID;
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return RMNETCTL_LIB_ERR;
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}
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memset(*hndl, 0, sizeof(rmnetctl_hndl_t));
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pid = getpid();
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if (pid < MIN_VALID_PROCESS_ID) {
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free(*hndl);
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*error_code = RMNETCTL_INIT_ERR_PROCESS_ID;
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return RMNETCTL_LIB_ERR;
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}
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(*hndl)->pid = KERNEL_PROCESS_ID;
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netlink_fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
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if (netlink_fd < MIN_VALID_SOCKET_FD) {
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free(*hndl);
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*error_code = RMNETCTL_INIT_ERR_NETLINK_FD;
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return RMNETCTL_LIB_ERR;
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}
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(*hndl)->netlink_fd = netlink_fd;
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memset(&(*hndl)->src_addr, 0, sizeof(struct sockaddr_nl));
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(*hndl)->src_addr.nl_family = AF_NETLINK;
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(*hndl)->src_addr.nl_pid = (*hndl)->pid;
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saddr_ptr = &(*hndl)->src_addr;
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if (bind((*hndl)->netlink_fd,
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(struct sockaddr *)saddr_ptr,
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sizeof(struct sockaddr_nl)) < 0) {
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close((*hndl)->netlink_fd);
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free(*hndl);
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*error_code = RMNETCTL_INIT_ERR_BIND;
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return RMNETCTL_LIB_ERR;
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}
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memset(&(*hndl)->dest_addr, 0, sizeof(struct sockaddr_nl));
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(*hndl)->dest_addr.nl_family = AF_NETLINK;
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(*hndl)->dest_addr.nl_pid = KERNEL_PROCESS_ID;
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(*hndl)->dest_addr.nl_groups = UNICAST;
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return RMNETCTL_SUCCESS;
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}
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static int rtrmnet_ctl_deinit(rmnetctl_hndl_t *hndl)
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{
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if (!hndl)
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return RMNETCTL_SUCCESS;
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close(hndl->netlink_fd);
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free(hndl);
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return RMNETCTL_SUCCESS;
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}
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static int rtrmnet_ctl_newvnd(rmnetctl_hndl_t *hndl, char *devname, char *vndname,
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uint16_t *error_code, uint8_t index,
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uint32_t flagconfig, uint32_t ul_agg_cnt, uint32_t ul_agg_size)
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{
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struct rtattr *attrinfo, *datainfo, *linkinfo;
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struct ifla_vlan_flags flags;
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int devindex = 0, val = 0;
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char *kind = "rmnet";
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struct nlmsg req;
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short id;
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if (!hndl || !devname || !vndname || !error_code)
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return RMNETCTL_INVALID_ARG;
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memset(&req, 0, sizeof(req));
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req.nl_addr.nlmsg_type = RTM_NEWLINK;
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req.nl_addr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
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req.nl_addr.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL |
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NLM_F_ACK;
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req.nl_addr.nlmsg_seq = hndl->transaction_id;
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hndl->transaction_id++;
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/* Get index of devname*/
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devindex = if_nametoindex(devname);
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if (devindex < 0) {
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*error_code = errno;
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return RMNETCTL_KERNEL_ERR;
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}
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/* Setup link attr with devindex as data */
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val = devindex;
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attrinfo = (struct rtattr *)(((char *)&req) +
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NLMSG_ALIGN(req.nl_addr.nlmsg_len));
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attrinfo->rta_type = IFLA_LINK;
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attrinfo->rta_len = RTA_ALIGN(RTA_LENGTH(sizeof(val)));
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memcpy(RTA_DATA(attrinfo), &val, sizeof(val));
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req.nl_addr.nlmsg_len = NLMSG_ALIGN(req.nl_addr.nlmsg_len) +
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RTA_ALIGN(RTA_LENGTH(sizeof(val)));
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/* Set up IFLA info kind RMNET that has linkinfo and type */
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attrinfo = (struct rtattr *)(((char *)&req) +
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NLMSG_ALIGN(req.nl_addr.nlmsg_len));
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attrinfo->rta_type = IFLA_IFNAME;
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attrinfo->rta_len = RTA_ALIGN(RTA_LENGTH(strlen(vndname) + 1));
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memcpy(RTA_DATA(attrinfo), vndname, strlen(vndname) + 1);
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req.nl_addr.nlmsg_len = NLMSG_ALIGN(req.nl_addr.nlmsg_len) +
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RTA_ALIGN(RTA_LENGTH(strlen(vndname) + 1));
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linkinfo = (struct rtattr *)(((char *)&req) +
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NLMSG_ALIGN(req.nl_addr.nlmsg_len));
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linkinfo->rta_type = IFLA_LINKINFO;
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linkinfo->rta_len = RTA_ALIGN(RTA_LENGTH(0));
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req.nl_addr.nlmsg_len = NLMSG_ALIGN(req.nl_addr.nlmsg_len) +
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RTA_ALIGN(RTA_LENGTH(0));
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attrinfo = (struct rtattr *)(((char *)&req) +
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NLMSG_ALIGN(req.nl_addr.nlmsg_len));
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attrinfo->rta_type = IFLA_INFO_KIND;
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attrinfo->rta_len = RTA_ALIGN(RTA_LENGTH(strlen(kind)));
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memcpy(RTA_DATA(attrinfo), kind, strlen(kind));
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req.nl_addr.nlmsg_len = NLMSG_ALIGN(req.nl_addr.nlmsg_len) +
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RTA_ALIGN(RTA_LENGTH(strlen(kind)));
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datainfo = (struct rtattr *)(((char *)&req) +
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NLMSG_ALIGN(req.nl_addr.nlmsg_len));
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datainfo->rta_type = IFLA_INFO_DATA;
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datainfo->rta_len = RTA_ALIGN(RTA_LENGTH(0));
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req.nl_addr.nlmsg_len = NLMSG_ALIGN(req.nl_addr.nlmsg_len) +
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RTA_ALIGN(RTA_LENGTH(0));
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id = index;
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attrinfo = (struct rtattr *)(((char *)&req) +
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NLMSG_ALIGN(req.nl_addr.nlmsg_len));
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attrinfo->rta_type = IFLA_VLAN_ID;
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attrinfo->rta_len = RTA_LENGTH(sizeof(id));
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memcpy(RTA_DATA(attrinfo), &id, sizeof(id));
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req.nl_addr.nlmsg_len = NLMSG_ALIGN(req.nl_addr.nlmsg_len) +
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RTA_ALIGN(RTA_LENGTH(sizeof(id)));
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if (flagconfig != 0) {
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flags.mask = flagconfig;
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flags.flags = flagconfig;
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attrinfo = (struct rtattr *)(((char *)&req) +
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NLMSG_ALIGN(req.nl_addr.nlmsg_len));
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attrinfo->rta_type = IFLA_VLAN_FLAGS;
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attrinfo->rta_len = RTA_LENGTH(sizeof(flags));
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memcpy(RTA_DATA(attrinfo), &flags, sizeof(flags));
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req.nl_addr.nlmsg_len = NLMSG_ALIGN(req.nl_addr.nlmsg_len) +
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RTA_ALIGN(RTA_LENGTH(sizeof(flags)));
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}
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if (ul_agg_cnt > 1) {
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struct rmnet_egress_agg_params agg_params;
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agg_params.agg_size = ul_agg_size;
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agg_params.agg_count = ul_agg_cnt;
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agg_params.agg_time = 3000000;
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attrinfo = (struct rtattr *)(((char *)&req) +
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NLMSG_ALIGN(req.nl_addr.nlmsg_len));
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attrinfo->rta_type = IFLA_RMNET_UL_AGG_PARAMS;
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attrinfo->rta_len = RTA_LENGTH(sizeof(agg_params));
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memcpy(RTA_DATA(attrinfo), &agg_params, sizeof(agg_params));
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req.nl_addr.nlmsg_len = NLMSG_ALIGN(req.nl_addr.nlmsg_len) +
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RTA_ALIGN(RTA_LENGTH(sizeof(agg_params)));
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}
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datainfo->rta_len = (char *)NLMSG_TAIL(&req.nl_addr) - (char *)datainfo;
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linkinfo->rta_len = (char *)NLMSG_TAIL(&req.nl_addr) - (char *)linkinfo;
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if (send(hndl->netlink_fd, &req, req.nl_addr.nlmsg_len, 0) < 0) {
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*error_code = RMNETCTL_API_ERR_MESSAGE_SEND;
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return RMNETCTL_LIB_ERR;
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}
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return rmnet_get_ack(hndl, error_code);
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}
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int rtrmnet_ctl_create_vnd(char *devname, char *vndname, uint8_t muxid,
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uint32_t qmap_version, uint32_t ul_agg_cnt, uint32_t ul_agg_size)
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{
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struct rmnetctl_hndl_s *handle;
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uint16_t error_code;
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int return_code;
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uint32_t flagconfig = RMNET_FLAGS_INGRESS_DEAGGREGATION;
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printf("%s devname: %s, vndname: %s, muxid: %d, qmap_version: %d\n",
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__func__, devname, vndname, muxid, qmap_version);
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ul_agg_cnt = 0; //TODO
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if (ul_agg_cnt > 1)
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flagconfig |= RMNET_EGRESS_FORMAT_AGGREGATION;
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if (qmap_version == 9) { //QMAPV5
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#ifdef RMNET_FLAGS_INGRESS_MAP_CKSUMV5
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flagconfig |= RMNET_FLAGS_INGRESS_MAP_CKSUMV5;
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flagconfig |= RMNET_FLAGS_EGRESS_MAP_CKSUMV5;
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#else
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return -1001;
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#endif
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}
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else if (qmap_version == 8) { //QMAPV4
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flagconfig |= RMNET_FLAGS_INGRESS_MAP_CKSUMV4;
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flagconfig |= RMNET_FLAGS_EGRESS_MAP_CKSUMV4;
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}
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else if (qmap_version == 5) { //QMAPV1
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}
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else {
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flagconfig = 0;
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}
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return_code = rtrmnet_ctl_init(&handle, &error_code);
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if (return_code) {
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printf("rtrmnet_ctl_init error_code: %d, return_code: %d, errno: %d (%s)\n",
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error_code, return_code, errno, strerror(errno));
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}
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if (return_code == RMNETCTL_SUCCESS) {
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return_code = rtrmnet_ctl_newvnd(handle, devname, vndname, &error_code,
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muxid, flagconfig, ul_agg_cnt, ul_agg_size);
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if (return_code) {
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printf("rtrmnet_ctl_newvnd error_code: %d, return_code: %d, errno: %d (%s)\n",
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error_code, return_code, errno, strerror(errno));
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}
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rtrmnet_ctl_deinit(handle);
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}
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return return_code;
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}
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