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authorFlorin Coras <fcoras@cisco.com>2023-02-07 17:36:17 -0800
committerDave Barach <vpp@barachs.net>2023-02-20 18:50:52 +0000
commiteff5f7aea8c7ca8a63c88624bf962c43b3f8bdd3 (patch)
tree5ea812f27cf5da59498cb5d2c69e6009852e7cca /src/vcl/ldp.c
parent7c7231fc30d9da81bc1311966fe8b9d8720c1623 (diff)
vcl: ldp support for ip_pktinfo
Type: improvement Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I3c15f38a4a3f5e92506059277948e7fca9cd8b55
Diffstat (limited to 'src/vcl/ldp.c')
-rw-r--r--src/vcl/ldp.c143
1 files changed, 120 insertions, 23 deletions
diff --git a/src/vcl/ldp.c b/src/vcl/ldp.c
index 71ce94bdd18..9e8858fb230 100644
--- a/src/vcl/ldp.c
+++ b/src/vcl/ldp.c
@@ -26,7 +26,7 @@
#include <stdarg.h>
#include <sys/resource.h>
#include <netinet/tcp.h>
-#include <linux/udp.h>
+#include <netinet/udp.h>
#include <vcl/ldp_socket_wrapper.h>
#include <vcl/ldp.h>
@@ -1556,17 +1556,14 @@ __recv_chk (int fd, void *buf, size_t n, size_t buflen, int flags)
static inline int
ldp_vls_sendo (vls_handle_t vlsh, const void *buf, size_t n,
- vppcom_endpt_tlv_t *ep_tlv, int flags,
+ vppcom_endpt_tlv_t *app_tlvs, int flags,
__CONST_SOCKADDR_ARG _addr, socklen_t addr_len)
{
const struct sockaddr *addr = SOCKADDR_GET_SA (_addr);
vppcom_endpt_t *ep = 0;
vppcom_endpt_t _ep;
- if (ep_tlv)
- {
- _ep.app_data = *ep_tlv;
- }
+ _ep.app_tlvs = app_tlvs;
if (addr)
{
@@ -1679,6 +1676,97 @@ recvfrom (int fd, void *__restrict buf, size_t n, int flags,
return size;
}
+static int
+ldp_parse_cmsg (vls_handle_t vlsh, const struct msghdr *msg,
+ vppcom_endpt_tlv_t **app_tlvs)
+{
+ uint8_t *ad, *at = (uint8_t *) *app_tlvs;
+ vppcom_endpt_tlv_t *adh;
+ struct in_pktinfo *pi;
+ struct cmsghdr *cmsg;
+
+ cmsg = CMSG_FIRSTHDR (msg);
+
+ while (cmsg != NULL)
+ {
+ switch (cmsg->cmsg_level)
+ {
+ case SOL_UDP:
+ switch (cmsg->cmsg_type)
+ {
+ case UDP_SEGMENT:
+ vec_add2 (at, adh, sizeof (*adh));
+ adh->data_type = VCL_UDP_SEGMENT;
+ adh->data_len = sizeof (uint16_t);
+ vec_add2 (at, ad, sizeof (uint16_t));
+ *(uint16_t *) ad = *(uint16_t *) CMSG_DATA (cmsg);
+ break;
+ default:
+ LDBG (1, "SOL_UDP cmsg_type %u not supported", cmsg->cmsg_type);
+ break;
+ }
+ break;
+ case SOL_IP:
+ switch (cmsg->cmsg_type)
+ {
+ case IP_PKTINFO:
+ vec_add2 (at, adh, sizeof (*adh));
+ adh->data_type = VCL_IP_PKTINFO;
+ adh->data_len = sizeof (struct in_addr);
+ vec_add2 (at, ad, sizeof (struct in_addr));
+ pi = (void *) CMSG_DATA (cmsg);
+ clib_memcpy_fast (ad, &pi->ipi_spec_dst,
+ sizeof (struct in_addr));
+ break;
+ default:
+ LDBG (1, "SOL_IP cmsg_type %u not supported", cmsg->cmsg_type);
+ break;
+ }
+ break;
+ default:
+ LDBG (1, "cmsg_level %u not supported", cmsg->cmsg_level);
+ break;
+ }
+ cmsg = CMSG_NXTHDR ((struct msghdr *) msg, cmsg);
+ }
+ *app_tlvs = (vppcom_endpt_tlv_t *) at;
+ return 0;
+}
+
+static int
+ldp_make_cmsg (vls_handle_t vlsh, struct msghdr *msg)
+{
+ u32 optval, optlen = sizeof (optval);
+ struct cmsghdr *cmsg;
+
+ cmsg = CMSG_FIRSTHDR (msg);
+
+ if (!vls_attr (vlsh, VPPCOM_ATTR_GET_IP_PKTINFO, (void *) &optval, &optlen))
+ return 0;
+
+ if (optval)
+ {
+ vppcom_endpt_t ep;
+ u8 addr_buf[sizeof (struct in_addr)];
+ u32 size = sizeof (ep);
+
+ ep.ip = addr_buf;
+
+ if (!vls_attr (vlsh, VPPCOM_ATTR_GET_LCL_ADDR, &ep, &size))
+ {
+ struct in_pktinfo pi = {};
+
+ clib_memcpy (&pi.ipi_addr, ep.ip, sizeof (struct in_addr));
+ cmsg->cmsg_level = SOL_IP;
+ cmsg->cmsg_type = IP_PKTINFO;
+ cmsg->cmsg_len = CMSG_LEN (sizeof (pi));
+ clib_memcpy (CMSG_DATA (cmsg), &pi, sizeof (pi));
+ }
+ }
+
+ return 0;
+}
+
ssize_t
sendmsg (int fd, const struct msghdr * msg, int flags)
{
@@ -1690,29 +1778,17 @@ sendmsg (int fd, const struct msghdr * msg, int flags)
vlsh = ldp_fd_to_vlsh (fd);
if (vlsh != VLS_INVALID_HANDLE)
{
+ vppcom_endpt_tlv_t *app_tlvs = 0;
struct iovec *iov = msg->msg_iov;
ssize_t total = 0;
int i, rv = 0;
- struct cmsghdr *cmsg;
- uint16_t *valp;
- vppcom_endpt_tlv_t _app_data;
- vppcom_endpt_tlv_t *p_app_data = NULL;
- cmsg = CMSG_FIRSTHDR (msg);
- if (cmsg && cmsg->cmsg_type == UDP_SEGMENT)
- {
- p_app_data = &_app_data;
- valp = (void *) CMSG_DATA (cmsg);
- p_app_data->data_type = VCL_UDP_SEGMENT;
- p_app_data->data_len = sizeof (*valp);
- p_app_data->value = *valp;
- }
+ ldp_parse_cmsg (vlsh, msg, &app_tlvs);
for (i = 0; i < msg->msg_iovlen; ++i)
{
- rv =
- ldp_vls_sendo (vlsh, iov[i].iov_base, iov[i].iov_len, p_app_data,
- flags, msg->msg_name, msg->msg_namelen);
+ rv = ldp_vls_sendo (vlsh, iov[i].iov_base, iov[i].iov_len, app_tlvs,
+ flags, msg->msg_name, msg->msg_namelen);
if (rv < 0)
break;
else
@@ -1723,6 +1799,8 @@ sendmsg (int fd, const struct msghdr * msg, int flags)
}
}
+ vec_free (app_tlvs);
+
if (rv < 0 && total == 0)
{
errno = -rv;
@@ -1828,7 +1906,11 @@ recvmsg (int fd, struct msghdr * msg, int flags)
size = -1;
}
else
- size = total;
+ {
+ if (msg->msg_controllen)
+ ldp_make_cmsg (vlsh, msg);
+ size = total;
+ }
}
else
{
@@ -2114,6 +2196,21 @@ setsockopt (int fd, int level, int optname,
break;
}
break;
+ case SOL_IP:
+ switch (optname)
+ {
+ case IP_PKTINFO:
+ rv = vls_attr (vlsh, VPPCOM_ATTR_SET_IP_PKTINFO, (void *) optval,
+ &optlen);
+ break;
+ default:
+ LDBG (0,
+ "ERROR: fd %d: setsockopt SOL_IP: vlsh %u optname %d"
+ "unsupported!",
+ fd, vlsh, optname);
+ break;
+ }
+ break;
default:
break;
}