diff options
Diffstat (limited to 'meta-facebook/meta-wedge/recipes-wedge/oob-nic/oob-nic/src/libnetlink.c')
-rw-r--r-- | meta-facebook/meta-wedge/recipes-wedge/oob-nic/oob-nic/src/libnetlink.c | 717 |
1 files changed, 0 insertions, 717 deletions
diff --git a/meta-facebook/meta-wedge/recipes-wedge/oob-nic/oob-nic/src/libnetlink.c b/meta-facebook/meta-wedge/recipes-wedge/oob-nic/oob-nic/src/libnetlink.c deleted file mode 100644 index 019e2c8..0000000 --- a/meta-facebook/meta-wedge/recipes-wedge/oob-nic/oob-nic/src/libnetlink.c +++ /dev/null @@ -1,717 +0,0 @@ -/* - * Note: Original file from iproute2 package - * - * libnetlink.c RTnetlink service routines. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> - * - */ - -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <syslog.h> -#include <fcntl.h> -#include <net/if_arp.h> -#include <sys/socket.h> -#include <netinet/in.h> -#include <string.h> -#include <errno.h> -#include <time.h> -#include <sys/uio.h> - -#include "libnetlink.h" - -int rcvbuf = 1024 * 1024; - -void rtnl_close(struct rtnl_handle *rth) -{ - if (rth->fd >= 0) { - close(rth->fd); - rth->fd = -1; - } -} - -int rtnl_open_byproto(struct rtnl_handle *rth, unsigned subscriptions, - int protocol) -{ - socklen_t addr_len; - int sndbuf = 32768; - - memset(rth, 0, sizeof(*rth)); - - rth->fd = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, protocol); - if (rth->fd < 0) { - perror("Cannot open netlink socket"); - return -1; - } - - if (setsockopt(rth->fd,SOL_SOCKET,SO_SNDBUF,&sndbuf,sizeof(sndbuf)) < 0) { - perror("SO_SNDBUF"); - return -1; - } - - if (setsockopt(rth->fd,SOL_SOCKET,SO_RCVBUF,&rcvbuf,sizeof(rcvbuf)) < 0) { - perror("SO_RCVBUF"); - return -1; - } - - memset(&rth->local, 0, sizeof(rth->local)); - rth->local.nl_family = AF_NETLINK; - rth->local.nl_groups = subscriptions; - - if (bind(rth->fd, (struct sockaddr*)&rth->local, sizeof(rth->local)) < 0) { - perror("Cannot bind netlink socket"); - return -1; - } - addr_len = sizeof(rth->local); - if (getsockname(rth->fd, (struct sockaddr*)&rth->local, &addr_len) < 0) { - perror("Cannot getsockname"); - return -1; - } - if (addr_len != sizeof(rth->local)) { - fprintf(stderr, "Wrong address length %d\n", addr_len); - return -1; - } - if (rth->local.nl_family != AF_NETLINK) { - fprintf(stderr, "Wrong address family %d\n", rth->local.nl_family); - return -1; - } - rth->seq = time(NULL); - return 0; -} - -int rtnl_open(struct rtnl_handle *rth, unsigned subscriptions) -{ - return rtnl_open_byproto(rth, subscriptions, NETLINK_ROUTE); -} - -int rtnl_wilddump_request(struct rtnl_handle *rth, int family, int type) -{ - return rtnl_wilddump_req_filter(rth, family, type, RTEXT_FILTER_VF); -} - -int rtnl_wilddump_req_filter(struct rtnl_handle *rth, int family, int type, - __u32 filt_mask) -{ - struct { - struct nlmsghdr nlh; - struct ifinfomsg ifm; - /* attribute has to be NLMSG aligned */ - struct rtattr ext_req __attribute__ ((aligned(NLMSG_ALIGNTO))); - __u32 ext_filter_mask; - } req; - - memset(&req, 0, sizeof(req)); - req.nlh.nlmsg_len = sizeof(req); - req.nlh.nlmsg_type = type; - req.nlh.nlmsg_flags = NLM_F_DUMP|NLM_F_REQUEST; - req.nlh.nlmsg_pid = 0; - req.nlh.nlmsg_seq = rth->dump = ++rth->seq; - req.ifm.ifi_family = family; - - req.ext_req.rta_type = IFLA_EXT_MASK; - req.ext_req.rta_len = RTA_LENGTH(sizeof(__u32)); - req.ext_filter_mask = filt_mask; - - return send(rth->fd, (void*)&req, sizeof(req), 0); -} - -int rtnl_send(struct rtnl_handle *rth, const void *buf, int len) -{ - return send(rth->fd, buf, len, 0); -} - -int rtnl_send_check(struct rtnl_handle *rth, const void *buf, int len) -{ - struct nlmsghdr *h; - int status; - char resp[1024]; - - status = send(rth->fd, buf, len, 0); - if (status < 0) - return status; - - /* Check for immediate errors */ - status = recv(rth->fd, resp, sizeof(resp), MSG_DONTWAIT|MSG_PEEK); - if (status < 0) { - if (errno == EAGAIN) - return 0; - return -1; - } - - for (h = (struct nlmsghdr *)resp; NLMSG_OK(h, status); - h = NLMSG_NEXT(h, status)) { - if (h->nlmsg_type == NLMSG_ERROR) { - struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h); - if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) - fprintf(stderr, "ERROR truncated\n"); - else - errno = -err->error; - return -1; - } - } - - return 0; -} - -int rtnl_dump_request(struct rtnl_handle *rth, int type, void *req, int len) -{ - struct nlmsghdr nlh; - struct sockaddr_nl nladdr = { .nl_family = AF_NETLINK }; - struct iovec iov[2] = { - { .iov_base = &nlh, .iov_len = sizeof(nlh) }, - { .iov_base = req, .iov_len = len } - }; - struct msghdr msg = { - .msg_name = &nladdr, - .msg_namelen = sizeof(nladdr), - .msg_iov = iov, - .msg_iovlen = 2, - }; - - nlh.nlmsg_len = NLMSG_LENGTH(len); - nlh.nlmsg_type = type; - nlh.nlmsg_flags = NLM_F_DUMP|NLM_F_REQUEST; - nlh.nlmsg_pid = 0; - nlh.nlmsg_seq = rth->dump = ++rth->seq; - - return sendmsg(rth->fd, &msg, 0); -} - -int rtnl_dump_filter_l(struct rtnl_handle *rth, - const struct rtnl_dump_filter_arg *arg) -{ - struct sockaddr_nl nladdr; - struct iovec iov; - struct msghdr msg = { - .msg_name = &nladdr, - .msg_namelen = sizeof(nladdr), - .msg_iov = &iov, - .msg_iovlen = 1, - }; - char buf[16384]; - int dump_intr = 0; - - iov.iov_base = buf; - while (1) { - int status; - const struct rtnl_dump_filter_arg *a; - int found_done = 0; - int msglen = 0; - - iov.iov_len = sizeof(buf); - status = recvmsg(rth->fd, &msg, 0); - - if (status < 0) { - if (errno == EINTR || errno == EAGAIN) - continue; - fprintf(stderr, "netlink receive error %s (%d)\n", - strerror(errno), errno); - return -1; - } - - if (status == 0) { - fprintf(stderr, "EOF on netlink\n"); - return -1; - } - - for (a = arg; a->filter; a++) { - struct nlmsghdr *h = (struct nlmsghdr*)buf; - msglen = status; - - while (NLMSG_OK(h, msglen)) { - int err; - - if (nladdr.nl_pid != 0 || - h->nlmsg_pid != rth->local.nl_pid || - h->nlmsg_seq != rth->dump) - goto skip_it; - - if (h->nlmsg_flags & NLM_F_DUMP_INTR) - dump_intr = 1; - - if (h->nlmsg_type == NLMSG_DONE) { - found_done = 1; - break; /* process next filter */ - } - if (h->nlmsg_type == NLMSG_ERROR) { - struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h); - if (h->nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr))) { - fprintf(stderr, - "ERROR truncated\n"); - } else { - errno = -err->error; - perror("RTNETLINK answers"); - } - return -1; - } - err = a->filter(&nladdr, h, a->arg1); - if (err < 0) - return err; - -skip_it: - h = NLMSG_NEXT(h, msglen); - } - } - - if (found_done) { - if (dump_intr) - fprintf(stderr, - "Dump was interrupted and may be inconsistent.\n"); - return 0; - } - - if (msg.msg_flags & MSG_TRUNC) { - fprintf(stderr, "Message truncated\n"); - continue; - } - if (msglen) { - fprintf(stderr, "!!!Remnant of size %d\n", msglen); - exit(1); - } - } -} - -int rtnl_dump_filter(struct rtnl_handle *rth, - rtnl_filter_t filter, - void *arg1) -{ - const struct rtnl_dump_filter_arg a[2] = { - { .filter = filter, .arg1 = arg1, }, - { .filter = NULL, .arg1 = NULL, }, - }; - - return rtnl_dump_filter_l(rth, a); -} - -int rtnl_talk(struct rtnl_handle *rtnl, struct nlmsghdr *n, pid_t peer, - unsigned groups, struct nlmsghdr *answer) -{ - int status; - unsigned seq; - struct nlmsghdr *h; - struct sockaddr_nl nladdr; - struct iovec iov = { - .iov_base = (void*) n, - .iov_len = n->nlmsg_len - }; - struct msghdr msg = { - .msg_name = &nladdr, - .msg_namelen = sizeof(nladdr), - .msg_iov = &iov, - .msg_iovlen = 1, - }; - char buf[16384]; - - memset(&nladdr, 0, sizeof(nladdr)); - nladdr.nl_family = AF_NETLINK; - nladdr.nl_pid = peer; - nladdr.nl_groups = groups; - - n->nlmsg_seq = seq = ++rtnl->seq; - - if (answer == NULL) - n->nlmsg_flags |= NLM_F_ACK; - - status = sendmsg(rtnl->fd, &msg, 0); - - if (status < 0) { - perror("Cannot talk to rtnetlink"); - return -1; - } - - memset(buf,0,sizeof(buf)); - - iov.iov_base = buf; - - while (1) { - iov.iov_len = sizeof(buf); - status = recvmsg(rtnl->fd, &msg, 0); - - if (status < 0) { - if (errno == EINTR || errno == EAGAIN) - continue; - fprintf(stderr, "netlink receive error %s (%d)\n", - strerror(errno), errno); - return -1; - } - if (status == 0) { - fprintf(stderr, "EOF on netlink\n"); - return -1; - } - if (msg.msg_namelen != sizeof(nladdr)) { - fprintf(stderr, "sender address length == %d\n", msg.msg_namelen); - exit(1); - } - for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) { - int len = h->nlmsg_len; - int l = len - sizeof(*h); - - if (l < 0 || len>status) { - if (msg.msg_flags & MSG_TRUNC) { - fprintf(stderr, "Truncated message\n"); - return -1; - } - fprintf(stderr, "!!!malformed message: len=%d\n", len); - exit(1); - } - - if (nladdr.nl_pid != peer || - h->nlmsg_pid != rtnl->local.nl_pid || - h->nlmsg_seq != seq) { - /* Don't forget to skip that message. */ - status -= NLMSG_ALIGN(len); - h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len)); - continue; - } - - if (h->nlmsg_type == NLMSG_ERROR) { - struct nlmsgerr *err = (struct nlmsgerr*)NLMSG_DATA(h); - if (l < sizeof(struct nlmsgerr)) { - fprintf(stderr, "ERROR truncated\n"); - } else { - if (!err->error) { - if (answer) - memcpy(answer, h, h->nlmsg_len); - return 0; - } - - fprintf(stderr, "RTNETLINK answers: %s\n", strerror(-err->error)); - errno = -err->error; - } - return -1; - } - if (answer) { - memcpy(answer, h, h->nlmsg_len); - return 0; - } - - fprintf(stderr, "Unexpected reply!!!\n"); - - status -= NLMSG_ALIGN(len); - h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len)); - } - if (msg.msg_flags & MSG_TRUNC) { - fprintf(stderr, "Message truncated\n"); - continue; - } - if (status) { - fprintf(stderr, "!!!Remnant of size %d\n", status); - exit(1); - } - } -} - -int rtnl_listen(struct rtnl_handle *rtnl, - rtnl_filter_t handler, - void *jarg) -{ - int status; - struct nlmsghdr *h; - struct sockaddr_nl nladdr; - struct iovec iov; - struct msghdr msg = { - .msg_name = &nladdr, - .msg_namelen = sizeof(nladdr), - .msg_iov = &iov, - .msg_iovlen = 1, - }; - char buf[8192]; - - memset(&nladdr, 0, sizeof(nladdr)); - nladdr.nl_family = AF_NETLINK; - nladdr.nl_pid = 0; - nladdr.nl_groups = 0; - - iov.iov_base = buf; - while (1) { - iov.iov_len = sizeof(buf); - status = recvmsg(rtnl->fd, &msg, 0); - - if (status < 0) { - if (errno == EINTR || errno == EAGAIN) - continue; - fprintf(stderr, "netlink receive error %s (%d)\n", - strerror(errno), errno); - if (errno == ENOBUFS) - continue; - return -1; - } - if (status == 0) { - fprintf(stderr, "EOF on netlink\n"); - return -1; - } - if (msg.msg_namelen != sizeof(nladdr)) { - fprintf(stderr, "Sender address length == %d\n", msg.msg_namelen); - exit(1); - } - for (h = (struct nlmsghdr*)buf; status >= sizeof(*h); ) { - int err; - int len = h->nlmsg_len; - int l = len - sizeof(*h); - - if (l<0 || len>status) { - if (msg.msg_flags & MSG_TRUNC) { - fprintf(stderr, "Truncated message\n"); - return -1; - } - fprintf(stderr, "!!!malformed message: len=%d\n", len); - exit(1); - } - - err = handler(&nladdr, h, jarg); - if (err < 0) - return err; - - status -= NLMSG_ALIGN(len); - h = (struct nlmsghdr*)((char*)h + NLMSG_ALIGN(len)); - } - if (msg.msg_flags & MSG_TRUNC) { - fprintf(stderr, "Message truncated\n"); - continue; - } - if (status) { - fprintf(stderr, "!!!Remnant of size %d\n", status); - exit(1); - } - } -} - -int rtnl_from_file(FILE *rtnl, rtnl_filter_t handler, - void *jarg) -{ - int status; - struct sockaddr_nl nladdr; - char buf[8192]; - struct nlmsghdr *h = (void*)buf; - - memset(&nladdr, 0, sizeof(nladdr)); - nladdr.nl_family = AF_NETLINK; - nladdr.nl_pid = 0; - nladdr.nl_groups = 0; - - while (1) { - int err, len; - int l; - - status = fread(&buf, 1, sizeof(*h), rtnl); - - if (status < 0) { - if (errno == EINTR) - continue; - perror("rtnl_from_file: fread"); - return -1; - } - if (status == 0) - return 0; - - len = h->nlmsg_len; - l = len - sizeof(*h); - - if (l<0 || len>sizeof(buf)) { - fprintf(stderr, "!!!malformed message: len=%d @%lu\n", - len, ftell(rtnl)); - return -1; - } - - status = fread(NLMSG_DATA(h), 1, NLMSG_ALIGN(l), rtnl); - - if (status < 0) { - perror("rtnl_from_file: fread"); - return -1; - } - if (status < l) { - fprintf(stderr, "rtnl-from_file: truncated message\n"); - return -1; - } - - err = handler(&nladdr, h, jarg); - if (err < 0) - return err; - } -} - -int addattr(struct nlmsghdr *n, int maxlen, int type) -{ - return addattr_l(n, maxlen, type, NULL, 0); -} - -int addattr8(struct nlmsghdr *n, int maxlen, int type, __u8 data) -{ - return addattr_l(n, maxlen, type, &data, sizeof(__u8)); -} - -int addattr16(struct nlmsghdr *n, int maxlen, int type, __u16 data) -{ - return addattr_l(n, maxlen, type, &data, sizeof(__u16)); -} - -int addattr32(struct nlmsghdr *n, int maxlen, int type, __u32 data) -{ - return addattr_l(n, maxlen, type, &data, sizeof(__u32)); -} - -int addattr64(struct nlmsghdr *n, int maxlen, int type, __u64 data) -{ - return addattr_l(n, maxlen, type, &data, sizeof(__u64)); -} - -int addattrstrz(struct nlmsghdr *n, int maxlen, int type, const char *str) -{ - return addattr_l(n, maxlen, type, str, strlen(str)+1); -} - -int addattr_l(struct nlmsghdr *n, int maxlen, int type, const void *data, - int alen) -{ - int len = RTA_LENGTH(alen); - struct rtattr *rta; - - if (NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len) > maxlen) { - fprintf(stderr, "addattr_l ERROR: message exceeded bound of %d\n",maxlen); - return -1; - } - rta = NLMSG_TAIL(n); - rta->rta_type = type; - rta->rta_len = len; - memcpy(RTA_DATA(rta), data, alen); - n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(len); - return 0; -} - -int addraw_l(struct nlmsghdr *n, int maxlen, const void *data, int len) -{ - if (NLMSG_ALIGN(n->nlmsg_len) + NLMSG_ALIGN(len) > maxlen) { - fprintf(stderr, "addraw_l ERROR: message exceeded bound of %d\n",maxlen); - return -1; - } - - memcpy(NLMSG_TAIL(n), data, len); - memset((void *) NLMSG_TAIL(n) + len, 0, NLMSG_ALIGN(len) - len); - n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + NLMSG_ALIGN(len); - return 0; -} - -struct rtattr *addattr_nest(struct nlmsghdr *n, int maxlen, int type) -{ - struct rtattr *nest = NLMSG_TAIL(n); - - addattr_l(n, maxlen, type, NULL, 0); - return nest; -} - -int addattr_nest_end(struct nlmsghdr *n, struct rtattr *nest) -{ - nest->rta_len = (void *)NLMSG_TAIL(n) - (void *)nest; - return n->nlmsg_len; -} - -struct rtattr *addattr_nest_compat(struct nlmsghdr *n, int maxlen, int type, - const void *data, int len) -{ - struct rtattr *start = NLMSG_TAIL(n); - - addattr_l(n, maxlen, type, data, len); - addattr_nest(n, maxlen, type); - return start; -} - -int addattr_nest_compat_end(struct nlmsghdr *n, struct rtattr *start) -{ - struct rtattr *nest = (void *)start + NLMSG_ALIGN(start->rta_len); - - start->rta_len = (void *)NLMSG_TAIL(n) - (void *)start; - addattr_nest_end(n, nest); - return n->nlmsg_len; -} - -int rta_addattr32(struct rtattr *rta, int maxlen, int type, __u32 data) -{ - int len = RTA_LENGTH(4); - struct rtattr *subrta; - - if (RTA_ALIGN(rta->rta_len) + len > maxlen) { - fprintf(stderr,"rta_addattr32: Error! max allowed bound %d exceeded\n",maxlen); - return -1; - } - subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len)); - subrta->rta_type = type; - subrta->rta_len = len; - memcpy(RTA_DATA(subrta), &data, 4); - rta->rta_len = NLMSG_ALIGN(rta->rta_len) + len; - return 0; -} - -int rta_addattr_l(struct rtattr *rta, int maxlen, int type, - const void *data, int alen) -{ - struct rtattr *subrta; - int len = RTA_LENGTH(alen); - - if (RTA_ALIGN(rta->rta_len) + RTA_ALIGN(len) > maxlen) { - fprintf(stderr,"rta_addattr_l: Error! max allowed bound %d exceeded\n",maxlen); - return -1; - } - subrta = (struct rtattr*)(((char*)rta) + RTA_ALIGN(rta->rta_len)); - subrta->rta_type = type; - subrta->rta_len = len; - memcpy(RTA_DATA(subrta), data, alen); - rta->rta_len = NLMSG_ALIGN(rta->rta_len) + RTA_ALIGN(len); - return 0; -} - -int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len) -{ - return parse_rtattr_flags(tb, max, rta, len, 0); -} - -int parse_rtattr_flags(struct rtattr *tb[], int max, struct rtattr *rta, - int len, unsigned short flags) -{ - unsigned short type; - - memset(tb, 0, sizeof(struct rtattr *) * (max + 1)); - while (RTA_OK(rta, len)) { - type = rta->rta_type & ~flags; - if ((type <= max) && (!tb[type])) - tb[type] = rta; - rta = RTA_NEXT(rta,len); - } - if (len) - fprintf(stderr, "!!!Deficit %d, rta_len=%d\n", len, rta->rta_len); - return 0; -} - -int parse_rtattr_byindex(struct rtattr *tb[], int max, struct rtattr *rta, int len) -{ - int i = 0; - - memset(tb, 0, sizeof(struct rtattr *) * max); - while (RTA_OK(rta, len)) { - if (rta->rta_type <= max && i < max) - tb[i++] = rta; - rta = RTA_NEXT(rta,len); - } - if (len) - fprintf(stderr, "!!!Deficit %d, rta_len=%d\n", len, rta->rta_len); - return i; -} - -int __parse_rtattr_nested_compat(struct rtattr *tb[], int max, struct rtattr *rta, - int len) -{ - if (RTA_PAYLOAD(rta) < len) - return -1; - if (RTA_PAYLOAD(rta) >= RTA_ALIGN(len) + sizeof(struct rtattr)) { - rta = RTA_DATA(rta) + RTA_ALIGN(len); - return parse_rtattr_nested(tb, max, rta); - } - memset(tb, 0, sizeof(struct rtattr *) * (max + 1)); - return 0; -} |