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Signed-off-by: Pavel Begunkov --- examples/send-zerocopy.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/examples/send-zerocopy.c b/examples/send-zerocopy.c index c83ef4d9..b4721672 100644 --- a/examples/send-zerocopy.c +++ b/examples/send-zerocopy.c @@ -68,6 +68,7 @@ static bool cfg_defer_taskrun = 0; static int cfg_cpu = -1; static bool cfg_rx = 0; static unsigned cfg_nr_threads = 1; +static const char *cfg_ifname; static int cfg_family = PF_UNSPEC; static int cfg_type = 0; @@ -343,6 +344,16 @@ static void do_tx(struct thread_data *td, int domain, int type, int protocol) if (fd == -1) t_error(1, errno, "socket t"); + if (cfg_ifname) { + struct ifreq ifr; + + memset(&ifr, 0, sizeof(ifr)); + snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), cfg_ifname); + + if (setsockopt(fd, SOL_SOCKET, SO_BINDTODEVICE, &ifr, sizeof(ifr)) < 0) + t_error(1, errno, "Binding to device failed\n"); + } + if (connect(fd, (void *)&td->dst_addr, cfg_alen)) t_error(1, errno, "connect, idx %i", td->idx); @@ -516,7 +527,7 @@ static void parse_opts(int argc, char **argv) cfg_payload_len = max_payload_len; - while ((c = getopt(argc, argv, "46D:p:s:t:n:z:b:l:dC:T:Ry")) != -1) { + while ((c = getopt(argc, argv, "46D:p:s:t:n:z:I:b:l:dC:T:Ry")) != -1) { switch (c) { case '4': if (cfg_family != PF_UNSPEC) @@ -530,6 +541,9 @@ static void parse_opts(int argc, char **argv) cfg_family = PF_INET6; cfg_alen = sizeof(struct sockaddr_in6); break; + case 'I': + cfg_ifname = optarg; + break; case 'D': daddr = optarg; break; @@ -588,6 +602,8 @@ static void parse_opts(int argc, char **argv) t_error(1, 0, "-s: payload exceeds max (%d)", max_payload_len); if (!cfg_nr_reqs) t_error(1, 0, "-n: submit batch can't be zero"); + if (cfg_ifname && cfg_rx) + t_error(1, 0, "Interface can only be specified for tx"); if (cfg_nr_reqs > 1 && cfg_type == SOCK_STREAM) printf("warning: submit batching >1 with TCP sockets will cause data reordering"); -- 2.48.1