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Consolidate send_ip*_eth() functions

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This commit is contained in:
dmiller
2025-06-23 20:54:31 +00:00
parent 92e2c5f2aa
commit 7637ce3674
2 changed files with 10 additions and 35 deletions
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42
libnetutil/netutil.cc
View File

@@ -3450,14 +3450,17 @@ int Sendto(const char *functionname, int sd,
/* Send an IP packet over an ethernet handle. */
int send_ip_packet_eth(const struct eth_nfo *eth, const u8 *packet, unsigned int packetlen) {
static int send_ip_packet_eth(const struct eth_nfo *eth, const u8 *packet, unsigned int packetlen, int af) {
eth_t *ethsd;
u8 *eth_frame;
int res;
size_t framelen;
uint16_t ethertype = (af == AF_INET6 ? ETH_TYPE_IPV6 : ETH_TYPE_IP);
eth_frame = (u8 *) safe_malloc(14 + packetlen);
framelen = 14 + packetlen;
eth_frame = (u8 *) safe_malloc(framelen);
memcpy(eth_frame + 14, packet, packetlen);
eth_pack_hdr(eth_frame, eth->dstmac, eth->srcmac, ETH_TYPE_IP);
eth_pack_hdr(eth_frame, eth->dstmac, eth->srcmac, ethertype);
if (!eth->ethsd) {
ethsd = eth_open_cached(eth->devname);
if (!ethsd)
@@ -3465,7 +3468,7 @@ int send_ip_packet_eth(const struct eth_nfo *eth, const u8 *packet, unsigned int
} else {
ethsd = eth->ethsd;
}
res = eth_send(ethsd, eth_frame, 14 + packetlen);
res = eth_send(ethsd, eth_frame, framelen);
/* No need to close ethsd due to caching */
free(eth_frame);
@@ -3531,7 +3534,7 @@ int send_ip_packet_eth_or_sd(int sd, const struct eth_nfo *eth,
const struct sockaddr_in *dst,
const u8 *packet, unsigned int packetlen) {
if(eth)
return send_ip_packet_eth(eth, packet, packetlen);
return send_ip_packet_eth(eth, packet, packetlen, AF_INET);
else
return send_ip_packet_sd(sd, dst, packet, packetlen);
}
@@ -3588,7 +3591,7 @@ int send_frag_ip_packet(int sd, const struct eth_nfo *eth,
/* There are three ways to send a raw IPv6 packet.
send_ipv6_eth works when the device is Ethernet. (Unfortunately IPv6-in-IPv4
send_ip_packet_eth works when the device is Ethernet. (Unfortunately IPv6-in-IPv4
tunnels are not.) We can control all header fields and extension headers.
send_ipv6_ipproto_raw must be used when IPPROTO_RAW sockets include the IP
@@ -3603,31 +3606,6 @@ int send_frag_ip_packet(int sd, const struct eth_nfo *eth,
protocol. (More precisely, one socket per distinct Next Header value.)
*/
/* Send an IPv6 packet over an Ethernet handle. */
static int send_ipv6_eth(const struct eth_nfo *eth, const u8 *packet, unsigned int packetlen) {
eth_t *ethsd;
struct eth_hdr *eth_frame;
u8 *copy;
int res;
copy = (u8 *) safe_malloc(packetlen + sizeof(*eth_frame));
memcpy(copy + sizeof(*eth_frame), packet, packetlen);
eth_frame = (struct eth_hdr *) copy;
eth_pack_hdr(eth_frame, eth->dstmac, eth->srcmac, ETH_TYPE_IPV6);
if (!eth->ethsd) {
ethsd = eth_open_cached(eth->devname);
if (!ethsd)
netutil_fatal("%s: Failed to open ethernet device (%s)", __func__, eth->devname);
} else {
ethsd = eth->ethsd;
}
res = eth_send(ethsd, eth_frame, sizeof(*eth_frame) + packetlen);
/* No need to close ethsd due to caching */
free(eth_frame);
return res;
}
#if HAVE_IPV6_IPPROTO_RAW
/* Send an IPv6 packet over a raw socket, on platforms where IPPROTO_RAW implies
@@ -3837,7 +3815,7 @@ bail:
int send_ipv6_packet_eth_or_sd(int sd, const struct eth_nfo *eth,
const struct sockaddr_in6 *dst, const u8 *packet, unsigned int packetlen) {
if (eth != NULL) {
return send_ipv6_eth(eth, packet, packetlen);
return send_ip_packet_eth(eth, packet, packetlen, AF_INET6);
} else {
#if HAVE_IPV6_IPPROTO_RAW
return send_ipv6_ipproto_raw(dst, packet, packetlen);

3
libnetutil/netutil.h
View File

@@ -424,9 +424,6 @@ int route_dst(const struct sockaddr_storage *dst, struct route_nfo *rnfo,
/* Send an IP packet over a raw socket. */
int send_ip_packet_sd(int sd, const struct sockaddr_in *dst, const u8 *packet, unsigned int packetlen);
/* Send an IP packet over an ethernet handle. */
int send_ip_packet_eth(const struct eth_nfo *eth, const u8 *packet, unsigned int packetlen);
/* Sends the supplied pre-built IPv4 packet. The packet is sent through
* the raw socket "sd" if "eth" is NULL. Otherwise, it gets sent at raw
* ethernet level. */