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dhcp.c: Make init_packet() not return a struct.

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Just work via a pointer to not rely on the compiler being intelligent
and inlining.
This commit is contained in:
Nicholas J. Kain 2015-02-14 01:41:52 -05:00
parent 70c750f50c
commit 0535b36534
1 changed files with 21 additions and 20 deletions
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41
src/dhcp.c
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@ -418,26 +418,23 @@ void handle_packet(struct client_state_t cs[static 1])
} }
// Initialize a DHCP client packet that will be sent to a server // Initialize a DHCP client packet that will be sent to a server
static struct dhcpmsg init_packet(char type, uint32_t xid) static void init_packet(struct dhcpmsg packet[static 1], char type)
{ {
struct dhcpmsg packet = { packet->op = 1; // BOOTREQUEST (client)
.op = 1, // BOOTREQUEST (client) packet->htype = 1; // ETH_10MB
.htype = 1, // ETH_10MB packet->hlen = 6; // ETH_10MB_LEN
.hlen = 6, // ETH_10MB_LEN packet->cookie = htonl(DHCP_MAGIC);
.cookie = htonl(DHCP_MAGIC), packet->options[0] = DCODE_END;
.options[0] = DCODE_END, add_option_msgtype(packet, type);
.xid = xid, memcpy(packet->chaddr, client_config.arp, 6);
}; add_option_clientid(packet, client_config.clientid,
add_option_msgtype(&packet, type);
memcpy(packet.chaddr, client_config.arp, 6);
add_option_clientid(&packet, client_config.clientid,
client_config.clientid_len); client_config.clientid_len);
return packet;
} }
ssize_t send_discover(struct client_state_t cs[static 1]) ssize_t send_discover(struct client_state_t cs[static 1])
{ {
struct dhcpmsg packet = init_packet(DHCPDISCOVER, cs->xid); struct dhcpmsg packet = {.xid = cs->xid};
init_packet(&packet, DHCPDISCOVER);
if (cs->clientAddr) if (cs->clientAddr)
add_option_reqip(&packet, cs->clientAddr); add_option_reqip(&packet, cs->clientAddr);
add_option_maxsize(&packet); add_option_maxsize(&packet);
@ -451,7 +448,8 @@ ssize_t send_discover(struct client_state_t cs[static 1])
ssize_t send_selecting(struct client_state_t cs[static 1]) ssize_t send_selecting(struct client_state_t cs[static 1])
{ {
char clibuf[INET_ADDRSTRLEN]; char clibuf[INET_ADDRSTRLEN];
struct dhcpmsg packet = init_packet(DHCPREQUEST, cs->xid); struct dhcpmsg packet = {.xid = cs->xid};
init_packet(&packet, DHCPREQUEST);
add_option_reqip(&packet, cs->clientAddr); add_option_reqip(&packet, cs->clientAddr);
add_option_serverid(&packet, cs->serverAddr); add_option_serverid(&packet, cs->serverAddr);
add_option_maxsize(&packet); add_option_maxsize(&packet);
@ -467,7 +465,8 @@ ssize_t send_selecting(struct client_state_t cs[static 1])
ssize_t send_renew(struct client_state_t cs[static 1]) ssize_t send_renew(struct client_state_t cs[static 1])
{ {
struct dhcpmsg packet = init_packet(DHCPREQUEST, cs->xid); struct dhcpmsg packet = {.xid = cs->xid};
init_packet(&packet, DHCPREQUEST);
packet.ciaddr = cs->clientAddr; packet.ciaddr = cs->clientAddr;
add_option_maxsize(&packet); add_option_maxsize(&packet);
add_option_request_list(&packet); add_option_request_list(&packet);
@ -479,7 +478,8 @@ ssize_t send_renew(struct client_state_t cs[static 1])
ssize_t send_rebind(struct client_state_t cs[static 1]) ssize_t send_rebind(struct client_state_t cs[static 1])
{ {
struct dhcpmsg packet = init_packet(DHCPREQUEST, cs->xid); struct dhcpmsg packet = {.xid = cs->xid};
init_packet(&packet, DHCPREQUEST);
packet.ciaddr = cs->clientAddr; packet.ciaddr = cs->clientAddr;
add_option_reqip(&packet, cs->clientAddr); add_option_reqip(&packet, cs->clientAddr);
add_option_maxsize(&packet); add_option_maxsize(&packet);
@ -492,7 +492,8 @@ ssize_t send_rebind(struct client_state_t cs[static 1])
ssize_t send_decline(struct client_state_t cs[static 1], uint32_t server) ssize_t send_decline(struct client_state_t cs[static 1], uint32_t server)
{ {
struct dhcpmsg packet = init_packet(DHCPDECLINE, cs->xid); struct dhcpmsg packet = {.xid = cs->xid};
init_packet(&packet, DHCPDECLINE);
add_option_reqip(&packet, cs->clientAddr); add_option_reqip(&packet, cs->clientAddr);
add_option_serverid(&packet, server); add_option_serverid(&packet, server);
log_line("%s: Sending a decline message...", client_config.interface); log_line("%s: Sending a decline message...", client_config.interface);
@ -501,8 +502,8 @@ ssize_t send_decline(struct client_state_t cs[static 1], uint32_t server)
ssize_t send_release(struct client_state_t cs[static 1]) ssize_t send_release(struct client_state_t cs[static 1])
{ {
struct dhcpmsg packet = init_packet(DHCPRELEASE, struct dhcpmsg packet = {.xid = nk_random_u32(&cs->rnd32_state)};
nk_random_u32(&cs->rnd32_state)); init_packet(&packet, DHCPRELEASE);
packet.ciaddr = cs->clientAddr; packet.ciaddr = cs->clientAddr;
add_option_reqip(&packet, cs->clientAddr); add_option_reqip(&packet, cs->clientAddr);
add_option_serverid(&packet, cs->serverAddr); add_option_serverid(&packet, cs->serverAddr);