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Added argument for the bind address to use. #7

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Jun 17, 2017
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Added argument for the bind address to use. #7

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17 changes: 13 additions & 4 deletions proxy.c
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Original file line number Diff line number Diff line change
Expand Up @@ -80,7 +80,7 @@ void plog(int priority, const char *format, ...);

int server_sock, client_sock, remote_sock, remote_port = 0;
int connections_processed = 0;
char *remote_host, *cmd_in, *cmd_out;
char *bind_addr, *remote_host, *cmd_in, *cmd_out;
bool foreground = FALSE;
bool use_syslog = FALSE;

Expand All @@ -89,10 +89,12 @@ int main(int argc, char *argv[]) {
int local_port;
pid_t pid;

bind_addr = NULL;

local_port = parse_options(argc, argv);

if (local_port < 0) {
printf("Syntax: %s -l local_port -h remote_host -p remote_port [-i \"input parser\"] [-o \"output parser\"] [-f (stay in foreground)] [-s (use syslog)]\n", argv[0]);
printf("Syntax: %s [-b bind_address] -l local_port -h remote_host -p remote_port [-i \"input parser\"] [-o \"output parser\"] [-f (stay in foreground)] [-s (use syslog)]\n", argv[0]);
return local_port;
}

Expand Down Expand Up @@ -132,11 +134,14 @@ int main(int argc, char *argv[]) {
int parse_options(int argc, char *argv[]) {
int c, local_port = 0;

while ((c = getopt(argc, argv, "l:h:p:i:o:fs")) != -1) {
while ((c = getopt(argc, argv, "b:l:h:p:i:o:fs")) != -1) {
switch(c) {
case 'l':
local_port = atoi(optarg);
break;
case 'b':
bind_addr = optarg;
break;
case 'h':
remote_host = optarg;
break;
Expand Down Expand Up @@ -181,7 +186,11 @@ int create_socket(int port) {
memset(&server_addr, 0, sizeof(server_addr));
server_addr.sin_family = AF_INET;
server_addr.sin_port = htons(port);
server_addr.sin_addr.s_addr = INADDR_ANY;
if (bind_addr == NULL) {
server_addr.sin_addr.s_addr = INADDR_ANY;
} else {
server_addr.sin_addr.s_addr = inet_addr(bind_addr);
}

if (bind(server_sock, (struct sockaddr*)&server_addr, sizeof(server_addr)) != 0) {
return SERVER_BIND_ERROR;
Expand Down