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Date: Tue, 2 Dec 2014 10:41:46 -0800
From: Martin KaFai Lau <kafai@...com>
To: <davem@...emloft.net>
CC: <netdev@...r.kernel.org>
Subject: [net_test_tools] udpflood: Add IPv6 support
This patch:
1. Add IPv6 support
2. Print timing for every 65536 fib insert operations to observe
the gc effect (mostly for IPv6 fib).
---
udpflood.c | 125 +++++++++++++++++++++++++++++++++++++++++++++++++------------
1 file changed, 101 insertions(+), 24 deletions(-)
diff --git a/udpflood.c b/udpflood.c
index 6e658f7..5855012 100644
--- a/udpflood.c
+++ b/udpflood.c
@@ -6,7 +6,9 @@
#include <string.h>
#include <errno.h>
#include <unistd.h>
+#include <stdint.h>
+#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
@@ -15,57 +17,121 @@
#define _GNU_SOURCE
#include <getopt.h>
+static int debug = 0;
+
+typedef union sa_u {
+ struct sockaddr_in a4;
+ struct sockaddr_in6 a6;
+} sa_u;
+
static int usage(void)
{
printf("usage: udpflood [ -l count ] [ -m message_size ] [ -c num_ip_addrs ] IP_ADDRESS\n");
return -1;
}
-static int send_packets(in_addr_t start_addr, in_addr_t end_addr,
- int port, int count, int msg_sz)
+static uint32_t get_last32h(const sa_u *sa)
+{
+ if (sa->a4.sin_family == PF_INET)
+ return ntohl(sa->a4.sin_addr.s_addr);
+ else
+ return ntohl(sa->a6.sin6_addr.s6_addr32[3]);
+}
+
+static void set_last32h(sa_u *sa, uint32_t last32h)
+{
+ if (sa->a4.sin_family == PF_INET)
+ sa->a4.sin_addr.s_addr = htonl(last32h);
+ else
+ sa->a6.sin6_addr.s6_addr32[3] = htonl(last32h);
+}
+
+static void print_sa(const sa_u *sa, const char *msg)
+{
+ char buf[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx")];
+
+ if (!debug)
+ return;
+
+ switch (sa->a4.sin_family) {
+ case PF_INET:
+ inet_ntop(PF_INET, &(sa->a4.sin_addr.s_addr), buf,
+ sizeof(buf));
+ break;
+ case PF_INET6:
+ inet_ntop(PF_INET6, sa->a6.sin6_addr.s6_addr, buf, sizeof(buf));
+ break;
+ }
+
+ printf("%s: %s\n", msg, buf);
+}
+
+static long get_diff_ms(const struct timeval *now,
+ const struct timeval *start)
+{
+ long start_ms, now_ms;
+ start_ms = start->tv_sec * 1000 + (start->tv_usec / 1000);
+ now_ms = now->tv_sec * 1000 + (now->tv_usec / 1000);
+ return now_ms - start_ms;
+}
+
+static int send_packets(const sa_u *start_sa, size_t num_addrs, int count,
+ int msg_sz)
{
char *msg = malloc(msg_sz);
- struct sockaddr_in saddr;
- in_addr_t addr;
+ sa_u cur_sa;
+ uint32_t start_addr32h, end_addr32h, cur_addr32h;
int fd, i, err;
+ struct timeval last, now;
if (!msg)
return -ENOMEM;
memset(msg, 0, msg_sz);
- addr = start_addr;
-
- memset(&saddr, 0, sizeof(saddr));
- saddr.sin_family = AF_INET;
- saddr.sin_port = port;
- saddr.sin_addr.s_addr = addr;
+ memcpy(&cur_sa, start_sa, sizeof(cur_sa));
+ cur_addr32h = start_addr32h = get_last32h(&cur_sa);
+ end_addr32h = start_addr32h + num_addrs;
- fd = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
+ fd = socket(cur_sa.a4.sin_family, SOCK_DGRAM, IPPROTO_IP);
if (fd < 0) {
perror("socket");
err = fd;
goto out_nofd;
}
- err = connect(fd, (struct sockaddr *) &saddr, sizeof(saddr));
+ err = connect(fd, (struct sockaddr *) &cur_sa, sizeof(cur_sa));
if (err < 0) {
perror("connect");
- close(fd);
goto out;
}
+ print_sa(start_sa, "start_addr");
+ gettimeofday(&last, NULL);
for (i = 0; i < count; i++) {
- saddr.sin_addr.s_addr = addr;
-
+ print_sa(&cur_sa, "sendto");
err = sendto(fd, msg, msg_sz, 0,
- (struct sockaddr *) &saddr, sizeof(saddr));
+ (struct sockaddr *) &cur_sa, sizeof(cur_sa));
if (err < 0) {
perror("sendto");
goto out;
}
- if (++addr >= end_addr)
- addr = start_addr;
+ if (++cur_addr32h >= end_addr32h)
+ cur_addr32h = start_addr32h;
+ set_last32h(&cur_sa, cur_addr32h);
+
+ /*
+ * print timing info for every 65536 fib inserts to
+ * observe the gc effect (mostly for IPv6 fib).
+ */
+ if (i && (i & 0xFFFF) == 0) {
+ long diff_ms;
+ gettimeofday(&now, NULL);
+ diff_ms = get_diff_ms(&now, &last);
+ printf("%d %ld.%ld\n", i >> 16,
+ diff_ms / 1000, diff_ms % 1000);
+ memcpy(&last, &now, sizeof(last));
+ }
}
err = 0;
@@ -79,14 +145,14 @@ out_nofd:
int main(int argc, char **argv, char **envp)
{
int port, msg_sz, count, num_addrs, ret;
- in_addr_t start_addr, end_addr;
+ sa_u start_sa;
port = 6000;
msg_sz = 32;
count = 10000000;
num_addrs = 1;
- while ((ret = getopt(argc, argv, "l:s:p:c:")) >= 0) {
+ while ((ret = getopt(argc, argv, "dl:s:p:c:")) >= 0) {
switch (ret) {
case 'l':
sscanf(optarg, "%d", &count);
@@ -100,18 +166,29 @@ int main(int argc, char **argv, char **envp)
case 'c':
sscanf(optarg, "%d", &num_addrs);
break;
+ case 'd':
+ debug = 1;
+ break;
case '?':
return usage();
}
}
+ if (num_addrs < 1 || count < 1)
+ return usage();
+
if (!argv[optind])
return usage();
- start_addr = inet_addr(argv[optind]);
- if (start_addr == INADDR_NONE)
+ memset(&start_sa, 0, sizeof(start_sa));
+ start_sa.a4.sin_port = htons(port);
+ if (inet_pton(PF_INET, argv[optind], &start_sa.a4.sin_addr))
+ start_sa.a4.sin_family = PF_INET;
+ else if (inet_pton(PF_INET6, argv[optind],
+ start_sa.a6.sin6_addr.s6_addr))
+ start_sa.a6.sin6_family = PF_INET6;
+ else
return usage();
- end_addr = start_addr + num_addrs;
- return send_packets(start_addr, end_addr, port, count, msg_sz);
+ return send_packets(&start_sa, num_addrs, count, msg_sz);
}
--
1.8.1
--
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