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udp: initial tx only implementation

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Matheus
2024-03-29 13:41:08 -03:00
parent f4d5425c18
commit e3dd7964b4
1 changed files with 23 additions and 0 deletions
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kernel-src/io/net/udp.c
+23
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#include <kernel/net.h>
#include <arch/cpu.h>
#include <logging.h>
int udp_allocdesc(netdev_t *netdev, size_t requestedsize, netdesc_t *desc) {
int e = netdev->allocdesc(requestedsize + sizeof(udpframe_t), desc);
desc->curroffset += sizeof(udpframe_t);
return e;
}
int udp_sendpacket(netdev_t *netdev, netdesc_t desc, uint32_t ip, uint16_t srcport, uint16_t dstport) {
size_t len = desc.size - desc.curroffset;
desc.curroffset -= sizeof(udpframe_t);
udpframe_t frame = {
.srcport = cpu_to_be_w(srcport),
.dstport = cpu_to_be_w(dstport),
.length = cpu_to_be_w(len),
.checksum = 0xfefe
};
memcpy((void *)((uintptr_t)desc.address + desc.curroffset), &frame, sizeof(udpframe_t));
return ipv4_sendpacket(netdev, desc, ip, IPV4_PROTO_UDP);
}