ng_pktsnip_t *ng_netreg_hdr_build(ng_nettype_t type, ng_pktsnip_t *payload, uint8_t *src, uint8_t src_len, uint8_t *dst, uint8_t dst_len) { switch (type) { #ifdef MODULE_NG_IPV6 case NG_NETTYPE_IPV6: return ng_ipv6_hdr_build(payload, src, src_len, dst, dst_len); #endif #ifdef MODULE_NG_TCP case NG_NETTYPE_TCP: return ng_tcp_hdr_build(payload, src, src_len, dst, dst_len); #endif #ifdef MODULE_NG_UDP case NG_NETTYPE_UDP: return ng_udp_hdr_build(payload, src, src_len, dst, dst_len); #endif default: (void)payload; (void)src; (void)src_len; (void)dst; (void)dst_len; return NULL; } }
static void send(char *addr_str, char *port_str, char *data) { uint8_t port[2]; uint16_t tmp; ng_pktsnip_t *payload, *udp, *ip; ng_ipv6_addr_t addr; ng_netreg_entry_t *sendto; /* parse destination address */ if (ng_ipv6_addr_from_str(&addr, addr_str) == NULL) { puts("Error: unable to parse destination address"); return; } /* parse port */ tmp = (uint16_t)atoi(port_str); if (tmp == 0) { puts("Error: unable to parse destination port"); return; } port[0] = (uint8_t)tmp; port[1] = tmp >> 8; /* allocate payload */ payload = ng_pktbuf_add(NULL, data, strlen(data), NG_NETTYPE_UNDEF); if (payload == NULL) { puts("Error: unable to copy data to packet buffer"); return; } /* allocate UDP header, set source port := destination port */ udp = ng_udp_hdr_build(payload, port, 2, port, 2); if (udp == NULL) { puts("Error: unable to allocate UDP header"); ng_pktbuf_release(payload); return; } /* allocate IPv6 header */ ip = ng_ipv6_hdr_build(udp, NULL, 0, (uint8_t *)&addr, sizeof(addr)); if (ip == NULL) { puts("Error: unable to allocate IPv6 header"); ng_pktbuf_release(udp); return; } /* send packet */ sendto = ng_netreg_lookup(NG_NETTYPE_UDP, NG_NETREG_DEMUX_CTX_ALL); if (sendto == NULL) { puts("Error: unable to locate UDP thread"); ng_pktbuf_release(ip); return; } ng_pktbuf_hold(ip, ng_netreg_num(NG_NETTYPE_UDP, NG_NETREG_DEMUX_CTX_ALL) - 1); while (sendto != NULL) { ng_netapi_send(sendto->pid, ip); sendto = ng_netreg_getnext(sendto); } printf("Success: send %i byte to %s:%u\n", payload->size, addr_str, tmp); }
static void udp_send(const char *str) { uint8_t data[20]; ng_pktsnip_t *payload, *udp, *ip; ng_netreg_entry_t *sendto; memcpy(data, str, strlen(str)); /* allocate payload */ payload = ng_pktbuf_add(NULL, data, strlen(str), NG_NETTYPE_UNDEF); if (payload == NULL) { puts("Error: unable to copy data to packet buffer"); return; } /* allocate UDP header, set source port := destination port */ udp = ng_udp_hdr_build(payload, port, 2, port, 2); if (udp == NULL) { puts("Error: unable to allocate UDP header"); ng_pktbuf_release(payload); return; } /* allocate IPv6 header */ ip = ng_ipv6_hdr_build(udp, NULL, 0, (uint8_t *)&addr, sizeof(addr)); if (ip == NULL) { puts("Error: unable to allocate IPv6 header"); ng_pktbuf_release(udp); return; } /* send packet */ sendto = ng_netreg_lookup(NG_NETTYPE_UDP, NG_NETREG_DEMUX_CTX_ALL); if (sendto == NULL) { puts("Error: unable to locate UDP thread"); ng_pktbuf_release(ip); return; } ng_pktbuf_hold(ip, ng_netreg_num(NG_NETTYPE_UDP, NG_NETREG_DEMUX_CTX_ALL) - 1); while (sendto != NULL) { ng_netapi_send(sendto->pid, ip); sendto = ng_netreg_getnext(sendto); } printf("Send %s\n", str); }