diff options
Diffstat (limited to 'src/network.c')
| -rw-r--r-- | src/network.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/src/network.c b/src/network.c index d162839..a7843dc 100644 --- a/src/network.c +++ b/src/network.c @@ -90,9 +90,33 @@ int prepare_send_netmsg(struct mcast_sock *m, void *data) return ret; } +static int tx_buflenmax; static int tx_buflen = 0; -/* XXX: use buffer size of interface MTU */ -static char __tx_buf[1460], *tx_buf = __tx_buf; +static char *tx_buf; + +#define HEADERSIZ 28 /* IP header (20 bytes) + UDP header 8 (bytes) */ + +int mcast_buffered_init(struct mcast_conf *conf) +{ + int mtu = conf->mtu - HEADERSIZ; + + /* default to Ethernet MTU 1500 bytes */ + if (mtu == 0) + mtu = 1500 - HEADERSIZ; + + tx_buf = malloc(mtu); + if (tx_buf == NULL) + return -1; + + tx_buflenmax = mtu; + + return 0; +} + +void mcast_buffered_destroy(void) +{ + free(tx_buf); +} /* return 0 if it is not sent, otherwise return 1 */ int mcast_buffered_send_netmsg(struct mcast_sock *m, void *data, int len) @@ -101,8 +125,8 @@ int mcast_buffered_send_netmsg(struct mcast_sock *m, void *data, int len) struct nethdr *net = data; retry: - if (tx_buflen + len < sizeof(__tx_buf)) { - memcpy(__tx_buf + tx_buflen, net, len); + if (tx_buflen + len < tx_buflenmax) { + memcpy(tx_buf + tx_buflen, net, len); tx_buflen += len; } else { __do_send(m, tx_buf, tx_buflen); |